Defects in stainless steel powder metallurgy products

Stainless steel powder metallurgy products, injection molding defects in blank mostly in the process of injection forming. Some of the defects of injection molding are visible to the naked eye, and some may appear in the subsequent desorption or sintering process, but also to be traced back to the injection molding process. Therefore, the quality control of stainless steel powder metallurgy products is very important.

Stainless steel powder metallurgy products injection forming slab defects: appearance observed flying edge, foaming, corrugated surface, layered or skin, depression, and deformation of surface black spots, the green strength is low and the operation of die sticking. The causes and influencing factors of these defects are various, among which the injection temperature and injection pressure are the key factors.

By adjusting the injection temperature and injection pressure, most of the defects can be solved. When the temperature and pressure of the adjustment to some defects change, further tracing to the binder system is the right choice, powder and a node agent mixed refining homogeneous degree, feeding with or without contamination, moisture absorption and moisture factors, also check the mold cavity design, the sprue, distributary channel and the gate design is reasonable.

In short, injection molding normal operation and high quality injection molding compacts, many influencing factors to in practice constantly explore and summarize, accumulate experience, to the problems are compared with the exact analysis and judgment, and make timely adjustments.

Difficulties in processing powder metallurgy parts

Although the development of P / M industry one of the goals is relieving machine and process of P to a main attraction is only a small amount of processing is needed, but many parts still need processing accuracy and better surface finish. Unfortunately the processing of these parts is extremely difficult. Most of the trouble encountered is caused by the porous.

Porous lead to micro fatigue of blade. Cut out the cutting edge of the cut, it is passed between particles and holes. The impact caused by the repeated small cracks on the cutting edge of the. The fatigue crack growth until the cutting edge chipping. This is usually very small micro chipping, abrasive wear is usually normal.

Also reduce the thermal conductivity of P/M porous parts. The result is on the cutting edge of a high temperature and can cause crater wear and deformation. Path connected to the internal porous structure provides cutting fluid discharged from the cutting area. This will cause thermal cracks or deformation, especially important in drilling.

The surface area of the porous structure caused by inner increase also allows oxidation and / or carbonation occurred during heat treatment. As previously mentioned, the oxide and carbide hard wear.

This is extremely important porous structure is also given failure parts hardness readings. When one intends to measure the macro hardness of P/M parts, which includes hole hardness factor. The porous structure leads to the collapse of the structure, the relatively soft parts of the wrong impression. A lot of hard particles to the individual. As described above, the difference is dramatic.

In the powder metallurgy parts of inclusions is negative. In the process, the particles are pulled from the surface when it is rubbed out of the cutting tool and can form a scratch or scratch on the surface of the part. These inclusions are usually large, leaving visible holes on the surface of the part.

The carbon content of the mixed lead to inconsistent workability. For example, the carbon content of FC0208 alloy is between 0.6% and 0.9%. A batch of 0.9% of the material with carbon content is relatively hard, resulting in poor tool life, while the other batch of carbon content of 0.6% of the material has excellent tool life.Two kinds of alloys are within the allowable range.

The final machining problem is related to the type of cutting which occurs on the P/M part. As the parts are close to the final shape, the cutting depth is very shallow. This requires free cutting edge. The built-up edge of the cutting edge often leads to micro collapse.

Stainless steel powder and its special application in MIM industry

25 years ago, AMETEK developed the production and processing of fine metal powder for the first time. By today, with advanced metallurgical technology, can provide custom formulations, as well as 45 microns (-325 mesh) powder screening, making AMETEK known as the best choice.

austenitic stainless steel

316L application in the requirements of parts with good corrosion resistance, high strength and ductility. Others have 304L, 310L and 347L.

Ferritic stainless steel

430L ferritic stainless steel combined with good magnetic ring and corrosion resistance. Others have P410L, P434L, P409 and P420.

17-4PH precipitation hardening stainless steel

This kind of stainless steel is used for parts that require high strength and hardness. It can also provide better corrosion resistance than the 400 series stainless steel, and can be treated by heat treatment to obtain different performance.

PM parts performance summary

Although one of the original intention of the P/M industry is to eliminate all of the processing, but this goal has not been reached. Most of the parts are "close to the final shape", it must be some kind of finishing. However, the removal of a small amount of material from the P/M component is typically very wear-resistant compared to castings and forgings.

Porous structure is one of the characteristics of P/M parts, which are widely used, but the tool life was damaged by porous structure. Porous structure can be oil storage and noise, but also produce intermittent cutting on the micro. When from the hole to solid particles moving to and fro nose continuously by the impact, which can lead to very small fatigue deformation and fracture along the cutting edge of the tiny chip. What is worse, usually hard particles.

Even if the macro hardness detected between Rockwell 20~35 degrees, but part of the particle's 60 degrees high of talok. These hard particles lead to severe and rapid wear of the blade. Many P/M parts are heat treated, and they are much harder and stronger after heat treatment. Finally, due to sintering and heat treatment technology and the use of gas, the surface will be hard and wear resistant oxide and / or carbide.

The bulk properties of P/M parts, including machinability, are not only related to the chemical composition of the alloy but also to the level of the porous structure. Many structural parts with hole rate up to 15~20%. The hole rate of the part used as a filter device may be as high as 50%. At the other end of the series, or HIP (forging die casting parts with hole thermionic) rate of 1% or less. This is especially important in the automotive and aircraft applications, because they can get a higher level of strength.

The tensile strength, toughness and ductility of P/M alloy will increase with the increase of the density, and it may also improve the workability. This is because the porous harmful effect on the nose. The increase of the hole rate and the sound insulation performance of the parts. Standard parts generally damped oscillations in the P/M parts to reduce. This is very important for machine tools, air conditioning duct and pneumatic tools. The high porosity of self lubricating gear is also necessary.

Shanghai Powder Metallurgy Exhibition –ZCMIM

Shanghai Everbright Powder Metallurgy Exhibition is April 2016 27-29, 26, Shenzhen ZCMIM powder metallurgy company's business people together went straight to Shanghai began to decorate the venue.

To the venue, first put up posters, gracefully counter, the show will be equipped with tables and chairs, consider the results of ZCMIM exhibition layout!

 

Is not very significant atmosphere? Slightly little deficiency is the company introduced did not add, but one way or the other, in fact, in the domestic, ZCMIM just make know there is such a company, mainly for customers or foreign, for some at home do purchasing or domestic branch of the customers, in the country, a number of promotional activities and exhibitions or to do the!

The next look tired a day of business and to eat and drink to play, to see their victories!

To tell you a hearsay! ZCMIM company in June will go to Germany for exhibition with the intention of friends can look at!

How to improve the processing performance of metallurgical parts?

(http://www.zcmim.com/)Powder metallurgy can was prepared by ordinary smelting method to preparation of special materials, and can produce various kinds of precision mechanical parts, powder metallurgy forming features not only, also labor-saving.

Physical properties of powder metallurgy, such as particle shape, particle size, particle size distribution and specific surface area. Common spherical, granular, flake like and needle like. The linear size of a single powder particle is its size, according to different size, divided into several levels, each level of powder in accordance with the quality, quantity or volume percentage is its size distribution.

The total surface area per unit mass of powder is its specific surface area. When the powder is compressed into a certain shape and the ability to maintain this shape in subsequent processing, the higher the compressive strength obtained under a certain pressure, the better the formability of powder metallurgy.

Powder metallurgy selection criteria

1 part size

The size of the powder metallurgy parts is limited to the compression of the powder and the forming press tonnage. For general steel powder metallurgy materials, parts of the following specifications can be prepared:

The projected surface area is less than 32 000ram2;

Diameter less than 175mm or less than 300ram (parts for large holes);

The maximum length is 150ram, the minimum length is 1.5ram;

The maximum ratio of length to diameter is 5:1; the maximum value of the ratio of length to wall thickness is 8.

If the product is designed to use non ferrous materials, the projected area can be increased by 50%

2 part shape

The geometry of the parts must be suitable for single axial compression movement in vertical direction (see legend parts). The undercut and concave or threads are generally formed in the subsequent processing or machining. When the cross section of the part is changed, the mold in the forming press is required to have different actions. These limitations parts only have five table, however, through the mold design, in the direction of the length of parts (table) increased small changes are possible (see specific instructions complex shape of powder metallurgy parts design MPIF design manual). When the part length is greater than 25.4mm, the density will be different from the top (highest density) to the middle (low density).

3 part number

In view of special mould is the use of "hardware", should discuss the quantity cost and feasibility of the number of production orders.

4 Mechanical / physical performance requirements

Standard 35 offers a wide range of design performance in order to contribute to the selection of suitable materials for most product applications. (6.4-6.9g / cm3) medium density steel grades can be alternative to cast iron or plain carbon steel; high density grades (7.0 - all / focusing) general alternative ductile cast iron and heat treatment of steel, powder forging and non porous material system generally can be used as a substitute for high performance steel. If the key performance requirements of the part design exceed the standard values listed in the standard, these requirements shall be detailed in the engineering drawings.

In order to select the best materials for performance and cost and feasibility of the two, and the application of the powder metallurgy parts manufacturers to discuss parts is the most important.

In order to avoid the emergence of the concept of unclear or misunderstanding, the buyer and production should be before manufacturing powder metallurgy parts, the following conditions reached an agreement: minimum intensity values, brand choice, chemical composition, acceptance test, performance standard value and powder metallurgy manufacturing process, because these may affect parts.

Introduction to MIM and PIM

MIM began at the end of 1970s, including product design, mold design, mold design, quality testing, mixing, injection, skim, sintering, two processing, such as 8 important links. With the continuous development of the research and the development of new binder, flour milling technology and the continuous progress of the process, to the beginning of the 90's has been realized. Currently, MIM has been hailed as' one of the world's most popular metal parts forming technology '.

PIM can manufacture of disposable many complex shapes difficult molding parts, such as a variety of external cutting groove, external thread, the tapered outer surface, cross holes, blind holes, grooves and key pin, strengthen rib plate, surface knurling. In addition, the technology can realize automatic continuous operation, the production efficiency is high, and the material utilization rate is almost 100%. And due to the traditional methods of production of tungsten and molybdenum powder with fine particle size by MIM process does not need to increase the cost of raw material powder, so that the tungsten and molybdenum products have significant economic benefits.

The most prominent advantages of powder metallurgy

ZCMIM powder metallurgy company to introduce you to two of the most prominent advantages of powder metallurgy:

(1) can make the other processes can be made or is difficult to manufacture materials and products, such as porous, sweating, shock absorption, noise, and other materials and products, tungsten, molybdenum, titanium and other refractory metal materials and products, metal plastic, double metal composite materials and products.

(2) to directly manufacture a logical or close to finished size requirements of products and to reduce or cancel the processing machinery, the material utilization rate can be up to more than 95%, it can in some products to the generation of iron and copper, do "material saving, energy saving.

Shanghai International Powder Metallurgy injection molding

Metal powder injection forming technology and traditional technology compared with high precision, uniform structure, excellent performance, low production cost, its products are widely used in the field of electronic and information engineering, bio medical devices, office equipment, automobile, machinery, hardware, sports equipment, clocks and watches industry, weapons, aviation, aerospace and other industrial.

Therefore, it is generally believed that the development of the technology will lead to a revolution in parts forming and processing technology, known as "the most popular parts forming technology" and "forming technology" in twenty-first Century ".

As the core function of automobile parts, engine processing equipment is one of the most important equipment of automobile production. With the acceleration of new models of vehicle enterprises to promote, the engine production line to the requirements of flexibility is more and more high, usually an engine production line needs to be able to meet the production of at least three models. At the same time, the development trend of automotive lightweight of engine block and cylinder head material requirements change from cast iron to Aluminum Alloy.

The rapid development of medical device industry provides a strong driving force for the development of powder injection molding industry. Medical devices contain a large number of precision components and sensors, due to people for medical equipment accuracy requirements, of precision parts and medical sensor accessories has a very high requirements,

By powder injection forming production medical parts with high precision, meet the most sophisticated medical equipment for components that need to be small, high density, complex shape, high mechanical performance requirements, so the development of medical device industry also will pull the injection forming parts usage, in the future, medical apparatus and instruments will still be an important market for China injection molding industry field

MIM industry has great room for development

It has some time in this company,there have continued domestic and foreign guests inquiry, nothing return after offered the quotation,since the MIM technology usually mold cost higher, so not for the sustainability of the sales of the product for a long time,it  is not suitable for this process to produce.

This week will go to Shanghai to participate in China International Powder Metallurgy Exhibition, a little excited, because it is an industry professional exhibition, all have a lot of MIM enterprises and institutions to actively participate in.

There you have a joyous gathering, sharing of new products, new technologies, new ideas, customers from different industries such as electronics, communications, medical, military, aerospace, IT electronic products, textile and other industries, because of the injection molding products we do can be used in the automotive industry, medical equipment, aerospace industry, watch electric tools, mobile phone, IT, digital communications, home appliances, military industry and so on, looking forward to meet with many new customers, 

build a high-quality database of potential customers, face-to-face communication with the intention of buyers, timely feedback to establish a more close relationship to obtain the market for ZCMIM products and services, to remain competitive and well-known in the market.

Other applications of powder metallurgy materials

First, to provide special materials for manufacturing and defense industries. Manufacturing industry is the foundation of the sustainable development of the national economy. It is the engine and power source of industrialization and modernization. Powder metallurgy products in the manufacturing industry especially the equipment manufacturing industry in the use of high strength, high density of mechanical parts, hard alloy, electric contact materials, a variety of permanent magnetic and soft magnetic materials, sintered metal filter material, etc. more and more.

In the defense industry, such as launch vehicles, missiles, aircraft engines, ships, nuclear industry, the use of heat and corrosion resistance, refractory metals, ultra hard materials in the military electronics industry, etc.. Can only be produced by powder metallurgy technology. In the modern science and technology, nanotechnology is an emerging field of powder metallurgy. Therefore, in the world, powder metallurgy technology has been a new technology is paid more attention in the field of material science.

Second, another powder metallurgy technology is the main direction of development of manufacturing machinery parts. Including structural parts, oil bearing and sintered friction materials. Powder metallurgy parts starting in 1916, in the performance of copper based powder metallurgy bearing industry. With the development of automobile industry, powder metallurgy parts for automobile manufacturing industry.

In order to adapt to the car to environmental protection, energy conservation, reduce manufacturing cost and improve the performance requirements, people developed the automobile engine, gearbox and other used on thousands of key powder metallurgy parts, such as exhaust door seat, a connecting rod, a ABS ring, all kinds of gear, chain wheel, automatic variable speed device part, cam. Powder metallurgy technology has become the automobile and auto parts manufacturing industry to improve and enhance the quality and development of new materials, new products, reduce production cost and enhance the competitive ability is one of the key technology. The global auto industry has been paid much attention.

Powder metallurgy selection criteria

1 part size

The size of the powder metallurgy parts is limited to the compression of the powder and the forming press tonnage. For general steel powder metallurgy materials, parts of the following specifications can be prepared:

The projected surface area is less than 32 000ram2;

Diameter less than 175mm or less than 300ram (parts for large holes);

The maximum length is 150ram, the minimum length is 1.5ram;

The maximum ratio of length to diameter is 5:1; the maximum value of the ratio of length to wall thickness is 8.

If the product is designed to use non ferrous materials, the projected area can be increased by 50%

2 part shape

The geometry of the parts must be suitable for single axial compression movement in vertical direction (see legend parts). The undercut and concave or threads are generally formed in the subsequent processing or machining. When the cross section of the part is changed, the mold in the forming press is required to have different actions. These limitations parts only have five table, however, through the mold design, in the direction of the length of parts (table) increased small changes are possible (see specific instructions complex shape of powder metallurgy parts design MPIF design manual). When the part length is greater than 25.4mm, the density will be different from the top (highest density) to the middle (low density).

3 part number

In view of special mould is the use of "hardware", should discuss the quantity cost and feasibility of the number of production orders.

4 Mechanical / physical performance requirements

Standard 35 offers a wide range of design performance in order to contribute to the selection of suitable materials for most product applications. (6.4-6.9g / cm3) medium density steel grades can be alternative to cast iron or plain carbon steel; high density grades (7.0 - all / focusing) general alternative ductile cast iron and heat treatment of steel, powder forging and non porous material system generally can be used as a substitute for high performance steel. If the key performance requirements of the part design exceed the standard values listed in the standard, these requirements shall be detailed in the engineering drawings.

In order to select the best materials for performance and cost and feasibility of the two, and the application of the powder metallurgy parts manufacturers to discuss parts is the most important.

In order to avoid the emergence of the concept of unclear or misunderstanding, the buyer and production should be before manufacturing powder metallurgy parts, the following conditions reached an agreement: minimum intensity values, brand choice, chemical composition, acceptance test, performance standard value and powder metallurgy manufacturing process, because these may affect parts.

Production process of powder metallurgy

The basic process of powder metallurgy includes powder preparation, molding and sintering. Powder preparation methods include mechanical crushing method, reduction method, atomization method, electrolysis method, gas phase deposition method, liquid phase deposition method, reduction method and so on.

Compression molding (steel mould) is the most widely used method in powder metallurgy production. It is a semi - finished or finished product with a predetermined shape, size, density and strength. Sintering is a complicated process of material transfer between powder particles at high temperature, which results in the strengthening of the bonding between the powder particles and the densification of the powders.

(1) production of powder. Powder production process including the preparation of powder, powder mixing and other steps. In order to improve the formability and the plasticity of the powder, the addition of gasoline, rubber or wax, etc..

(2) pressing and forming. The powder is pressed into the desired shape under 500-600MPa pressure.

(3) sintering. In the protection of the atmosphere of the high temperature furnace or vacuum furnace. Sintering is different from metal melting, sintering at least one element is still in the solid state. Become metallurgical products with a certain porosity and sintering process of powder particles by diffusion, recrystallization, welding, the compound, the dissolution a series of physical and chemical processes.

(4) after treatment. In general, sintered parts can be used directly. But for some of the requirements of high precision and high hardness, wear resistance of the parts will be processed after sintering. Postprocessing including coining, rolling, extrusion, quenching, surface hardening, immersion and infiltration etc.

Why is the metal part of the metal powder injection molding injection molding it?

Metal powder injection molding (MIM) is a new type of powder metallurgy near net forming technology which combines the modern plastic injection molding technology with the traditional powder metallurgy technology. MIM products with high dimensional accuracy (+ 0.1% ~ + 0.5%), good surface finish (roughness 1 ~ 5 m), and the yield is very large. But the MIM process is more, there are certain technical barriers. Why MIM can't do a mobile phone in the frame structure / back cover larger?

First of all, MIM debinding and sintering will make the product size, product size, size deviation is larger, and not easy to skim;

Secondly, the majority of MIM stainless steel parts, although stainless steel anode, but still aluminum anode effect best (mainly because of the aluminum oxide layer by alumina composition, the formation of well ordered hexagonal tube structure, similar to the specular reflection effect, the color looks bright.

Nevertheless, there are still companies try to use MIM technology in the mobile phone / box cover, is the MIM technology to further tap! In general, at present, processing machine represents the phone boxes / cover in the high-end market; stamping represents a phone box / cover in the low-end market, the mainstream of MIM on behalf of mobile phone small parts and other metal parts.

MIM future development direction

Although MIM is getting more and more attention, but at present its scale and traditional processing technology is also significantly weaker, there is a great potential for development. The new MIM industry also requires us to adopt a series of efforts to develop industrial standards, accelerate industrialization, improve the quality of practitioners, research and development equipment, and strive for customers, and so on.

(1) the multi direction development of the material system

Injection molding technology is ideal, can be economical to form, close to the final need shape, the need for a small amount or do not need subsequent processing of near net shape forming technology. Mainly used in the production of precision ceramics carbide, metal ceramics, inorganic non-metallic ceramics, oxide ceramics, metal compounds, etc..

(2) the diversification of binder and the multi way of skim Technology

With acetic acid fiber, polyethylene glycol polymer, acrylic polymer, agar as the matrix, many of the binder system has been further development and application. Computer aided control of thermal skim technology, solvent absorbent, catalytic technology, and freeze drying technology, microwave assisted drying technology are used in the study of adhesive.

(3) more advanced, more accurate control of the equipment

The research and development of the computer aided key equipment technology of the key equipment of the key equipment of the key equipment of the computer aided research and the development of the key equipment of the key equipment for the research and development of the key equipment for the research of the computer and the relevant online quality control system for injection molding machine. Forming equipment, such as powder synchronous injection molding machine, the use of control and coordination of the production of composite materials.

(4) to form the industry association of industry chain, industry intensive and meticulous farming

The technology and engineering capability in-depth understanding, the formation of eco industrial chain, industrial chain to accelerate the development of Baotuan resistance risk.

Copper based powder metallurgy oil bearing

Cu Fe based powder metallurgy bearing working principle: powder metallurgy bearing the porous sintered body, the impregnation of 10%~40% (volume fraction) of lubricating oil, to oil supply condition. During operation, the bearing temperature, because the expansion coefficient of oil than metal, thus automatically enter the sliding surface to stop working when the oil lubricated bearings, and decreased with the temperature being sucked back into the void.

Cu Fe based powder metallurgy bearing is to iron and copper powder as raw material, through mould pressing, sintering, vacuum oil immersion after processing. The products are widely used in household appliances, electric tools, textile machinery, chemical machinery and automobile industry etc..

Copper iron base powder metallurgy bearing processing type: can processed into a straight sleeve, flange shaft sleeve, gaskets, slider, non-standard shaped pieces, supporting non-standard custom-made products.

Copper iron base powder metallurgy bearing application characteristics: powder metallurgy bearings oil in general is mainly used raw material powder by pressing, sintering, shaping, oil impregnation process and. The production machine with higher degree of automation, the daily output is relatively large, once most of the products forming, so the better batch production.

And now for a little less mold might do a few hundred thousand, many words can do more than one million. But the mold cost is relatively high, so the small batch if not done well, and mould replacement time is long. Powder metallurgy oil bearing in general will be able to shape, basically no cutting processing. The cost is lower than the machine processing, the material waste also is little, the price therefore is quite cheap. Also in line with the current national policy to promote energy conservation, so that this is a technology that will not fall behind.

Powder metallurgy oil bearing the matrix have used vacuum impregnation method with lubricating oil, and in operation due to the elevated temperature and the pump suction, the lubricating oil will seep to the running surface, so it can be for no extra lubricant occasions.

Cost analysis of each process in MIM production process

MIM applicable materials mainly include: Fe alloy, Fe-Ni alloy, stainless steel, W alloy, Ti alloy, Si-Fe alloy, hard alloy, permanent magnetic alloy and alumina, silicon nitride, zirconia and other ceramic materials.

MIM process longer, many materials processing, in the actual production, if through scientific analysis to know which processes cost is the highest, to improve the key process to improve the efficiency, yield, we can effectively increase the profit, so as to improve the enterprise's own competitiveness, especially in the current Chinese economy has entered a new normal situation, to the enterprise is particularly important.

For hard, brittle hard cutting materials or casting materials with complex geometry, segregation or contamination of the components, using MIM technology can greatly save the cost.

Clearly, the MIM industry in general, degreasing, injection molding, mold loss is 3 place 3 low cost, but also add up to 3 of the total is 10%~15%, not only to the postprocessing of 1/3! (of course, according to different products have different difference).

MIM difficulty

What are the difficulties of MIM? MIM manufacturer ZCMIM to help you answer!

(1) control of parts size accuracy

Compared with the traditional powder metallurgy method, the accuracy of metal injection molding is still a certain gap. There is room for improvement in precision, mainly through the fine process control, sometimes using two times, such as machining, heat treatment and polishing, etc..

(2) lower production costs

To save cost by optimizing the production process, standardized operation, recycling of waste materials and so on.

Why foreign trade salesman development letter into spam

Email marketing is foreign customer development indispensable step, but the general effect is not good, reply rarely, a list of customers can have half of the people who received the letter is good. Where is the problem? Usually the process is identified as the bulk of the "unauthorized spam", but if you take a hair, and send the contents are not the same, it is not a spam.

Development do not believe easily recklessly, must understand the customer's basic situation, to find customers, customer demand for products that you most likely to find. You can help customers succeed, you naturally moved him. The mail is not the length, but in the refining, to seize the customers everywhere. Starting from the other side of the benefits. You can touch the customer, there is a natural force.

Foreign trade will Everything is going smoothly.?

I graduated in 2003, has been to do foreign trade industry, diving clothing, household products, jewelry, and other related products. The former is essentially in the documentary and procurement work and stable income let yourself without any hope for the future, the world is so big, I want money to see, so decided to quit to now the company engaged in foreign trade salesman, our company's website: http://www.zcmim.com is a professional engaged in stainless steel, hard alloy, high density tungsten alloy, Fe and so on metal powder injection molding product development, production and sales of the company.

Can according to customer's demand, mass production of precision, 3D shape complex and has a special performance requirements of metal parts, the emerging industry and has never engaged in business development, make more in the future a lot of uncertainty, but company foreign trade platform and colleagues help, let me have confidence and slowly familiar with the product knowledge, business development steps, hope to soon meet in life honored guest, opened the first single foreign trade. If you have a good foreign trade of the experience to teach, I would be grateful!

MIM process is the most suitable for large quantities of high difficulty parts requirements

From the analysis of the nature of MIM technology, is the most suitable for the production of large quantities of high melting point, high strength, technology of parts with complex shape, its advantages can be summarized as follows:

(1) MIM can be all kinds of metal materials forming complex 3D shapes (as long as the material can be made into fine powder). The uniform density and performance parts, both isotropic. For parts design provides a greater degree of freedom.

(2) MIM can maximize the preparation of near net shape parts, high precision.

(3) even more than solid state sintering, relative density of up to 95% MIM products, its performance can be comparable with the forging materials. Especially good dynamic performance.

(4) powder metallurgy (PM) automatic molding machine, injection molding machine several times higher than the price. MIM can be used conveniently in a multi cavity mould forming, high efficiency, long service life of the die, convenient and quick adjustment of mould.

(5) the injection material can be used repeatedly, the material utilization rate of more than 98%.

(6) products to fast. Production flexibility, new products from design to production time is short.

(7) MIM is especially suitable for mass production, and the product performance is good. If the parts of the production are chosen appropriately, the quantity is large, and the economic benefit can be obtained.

(8) MIM materials used in a wide range, wide application areas. Can be used for injection molding material is very wide, such as carbon steel, alloy steel, tool steel, refractory alloy, hard alloy, high proportion of alloys, etc..

Yesterday, the person in charge of the Swiss KABA group came to ZCMIM look at the plant

Yesterday met with the Swiss KABA group JEFF, their company in China, Shenzhen, there is a procurement office, according to yesterday's ZCMIM technology business team report, small make up the next customer feedback is as follows:

Kaba group is the world's third largest security equipment group enterprises every year in China's procurement of $60 million. Today he is mainly to do the preliminary watch factory, understand the zcmim management structure, design department, production capacity, tasting program and our core competitiveness and subsequent zcmim powder metallurgy factory to Kaba management structure chart, design structure diagram and equipment list to him, he submitted information, said that after Kaba company send foreign colleagues come to factory inspection, after signing a confidentiality agreement will design drawings to us for quotation.

Overall operational feedback from the customer's attitude is satisfactory, and now every week 3 customers come round to see a factory, ZCMIM attention in powder metallurgy has 8 years of industry experience, this is also a lot of foreigners fancy place, also factory MIM devices and services, the customer look at the factory at the same time will feel, real strength is customers to talk! Friends who are interested to watch factory!www.zcmomim.com

Cost analysis of each process in MIM process

MIM applicable materials mainly include: Fe alloy, Fe-Ni alloy, stainless steel, W alloy, Ti alloy, Si-Fe alloy, hard alloy, permanent magnetic alloy and alumina, silicon nitride, zirconia and other ceramic materials.

MIM process longer, many materials processing, in the actual production, if through scientific analysis to know which processes cost is the highest, to improve the key process to improve the efficiency, yield, we can effectively increase the profit, so as to improve the enterprise's own competitiveness, especially in the current Chinese economy has entered a new normal situation, to the enterprise is particularly important.

For the perfect, hard to cut material or difficult to cut the geometry of the complex, casting raw materials, segregation or contamination of the parts, using MIM technology can greatly save costs.

MIM industry are clear, usually, skim, injection molding, mold loss for 3 of the 3 lower costs, the 3 plus up is but the total amount of 10%~15%, only less than after the treatment of 1/3! (of course, according to different products will have different differences).

Reduce the cost of the main direction of:

1) their ingredients, mixing by feeding, but high technical barriers;

2) to improve the yield of the product, use the maximum feeding;

3) the process of improving the process to induce the accelerated removal of the binder, it may greatly reduce the cost of sintering;

4) to strengthen the training, training an experienced, skilled workforce, in order to reduce the number of employees.

The reason is that after the treatment including: sand blasting, to the front, shaping and testing, most of the artificial detection. Artificial detection accounts for a large proportion of the cost

What is the surface treatment of metal injection molding process?

MIM pieces of commonly used surface treatment process? Follow the ZCMIM metal injection molding process manufacturers to learn about it!

Polishing process

To reduce the surface roughness of the workpiece by using mechanical, chemical or electrochemical processes to obtain a bright and smooth surface.

Plating treatment

Process for attaching a metal or other material to a metal film on the surface of a metal or other material. Electroplating can play a role in preventing metal oxidation (such as corrosion), improve wear resistance, conductivity, reflective, corrosion resistance (such as copper sulfate, etc.) and enhance the role of beauty and so on.

PVD treatment

Using the physical process to realize the material transfer, the atom or molecule is transferred from the source to the surface of the substrate. Its function is to make some special properties (such as high strength, wear resistance, heat resistance, corrosion resistance, etc.) particles sprayed on the lower performance of the matrix, making the matrix has better performance.

Blackening

The metal surface to produce a layer of oxide film, to isolate the air, to achieve the purpose of rust, is a chemical treatment is very common. The appearance of requirements is not high by blackening, the main component of blackening is sodium hydroxide and sodium nitrite.

Phosphating treatment

Is a kind of chemical and electrochemical reaction to form the phosphate film process. The purpose of phosphate is mainly:

1) to provide protection to the base metal, to a certain extent, to prevent corrosion of metal;

2) for painting before bottoming, improve the paint film adhesion and corrosion resistance.

Spray treatment

Through the gun or disc type atomizer, with pressure or centrifugal force and disperse into uniform and fine droplets, applying to be painted surface coating method.

In short:

1) polishing, phosphating is mainly pretreatment, preparation for the rest of the treatment;

2) electroplating, PVD is the application of more two kinds of processing technology;

3) and black spray would have great changes on the surface of the products, more suitable for large workpiece.

Processing method for complex parts

The structure of the more complex parts are generally precision casting or investment casting process. Here zcmim powder metallurgy to introduce the processing methods of complex parts there.

Part structure analysis

The analysis of the components in the processing of parts by important, it analysis the influence to the parts clamping. Don't underestimate this link clamping. Often put clip mistakes can make the machining process can not continue down, so that the parts can not be completed.

1, the basic types of parts

(1) parts of the composition of a variety, such as the pros and cons of mating parts, parts of the surface of the main surface of the parts to be processed parts. First, we should according to the characteristics of the parts to analyze the processing route of the parts.

2, parts of the processing surface

(2) the selection of parts of the processing surface is very important, often the wrong choice of the processing surface so that parts can not be installed in the next step, so that parts processing can not continue.

Two, a brief introduction of the processing parts of the relevant processes

1, part of the processing of material selection

Blank data including all blank manufacturing methods of technical and economic characteristics of various profiles of varieties and specifications, rough map; under no blank map, practical understanding of the blank shape, size and mechanical properties of the. Different material will affect the components and different material will make the service life of the parts and the production cost is greatly different, so parts of the material is especially important.

2, to develop the process route.

3, determine the machining allowance of each process, calculate the working dimensions and tolerances.

4, determine the various processes used in the equipment and tools, fixtures, measuring tools and auxiliary tools.

5, determine the time quota.

6, processing parts.

7, check the size of the parts.a

Demand for powder metallurgy parts remains stable growth

In the past 10 years, from the market demand for auto parts, from 34% to 45% growth. And, in recent years, the demand for powder metallurgy parts in the automotive industry is still growing steadily. A car in the weight of powder metallurgy parts, the United States increased from 12 kg to 18-20 kg, Japan rose from 6.5 kg to 10 kg, from 7 kg to 8-10 kg in europe.

Large orders, high profits, become the supplier of auto parts, is the development goals of many powder metallurgy enterprises. However, the strict requirements on the quality of automotive parts, discourage  many enterprises.

As with the host plant plans to maintain coordination, to meet the needs of the host plant frequent changes: "on time delivery" supply mode; to ensure quality and stability, the whole process of quality tracking, etc.. Faced with changes in market demand, how to overcome the difficulties, seize the opportunity, every day thinking about the problem of powder metallurgy entrepreneurs. "The devil in the details", from the powder metallurgical material and mixed material screening, forming, sintering and post processing, On a step by step, resulting in thousands of miles.

The 21st century, the rapid development of science and technology for powder metallurgy products of China's rapid development provides a solid foundation, powder metallurgy products in China from so far only lasts for a few decades of time has in the market into the from all walks of life, which indicates that the powder metallurgy products in today's society has great significance.

Powder injection molding is widely used in the field of mobile phone

The application of powder injection molding is more and more extensive, and the technology of powder injection molding is used on the mobile phone. As the market needs a lighter, thinner and more beautiful cell phone, the best technology to reduce the size of the phone, mobile phone companies are seeking to use metal injection molding method to manufacture mobile phone assembly parts.

Our first metal cell phone is made of aluminum, we found that in order to meet all the requirements, metal injection molding method is the best, in many cases is the only choice. But not as the first material parts, metal injection molding, because the mobile phone market has very short service life, the style changes quickly, and the metal injection molding method of long production cycle, high cost.

Now there are several mobile phone parts are made of metal injection molding manufacturing method, such as: the use of tungsten manufacturing oscillator balance weight, using high strength steel hinge manufacture, application of metal injection molding is the most important method in mobile phone manufacturing slide, barrel and hinge. Technical advantages and metal injection molding method of metal injection molding can increase its application in mobile phone manufacturing, mobile phone manufacturing industry of metal injection molding method is lack of understanding of the impact of the application.

Now the metal injection molding method is used to create the structure and function of complex mobile phone, such as flip mobile phone. Considering the time and cost of manufacture, making the ordinary mobile phone should not be used for metal injection molding parts.

From this event can be seen, the application of powder injection moulding to more widely. The technology is more and more skilled, with the development of social economy, the powder injection molding will step onto a higher level.

Domestic metal injection molding industry product quantity and output value has a lot of room for improvement

At present, the competition between countries in the automotive industry is becoming increasingly fierce, the prerequisite for winning in the fierce competition is the low cost technology to produce high quality products, the automobile industry in the near net forming processing production put forward higher requirements. The development of metal powder injection molding (MIM) technology has greatly promoted the development of automobile industry.          

MIM combines the advantages of two kinds of powder metallurgy and plastic injection molding technology, breaking the traditional metal powder pressing molding process in product shape. MIM powder metallurgy technology can be sintered to a dense, with good mechanical properties and surface quality of mechanical parts. At the same time, the plastic injection forming technology to large scale and high efficiency production with many complexity characteristics of parts: such as a variety of external grooving, external thread, the tapered outer surface, cross through holes, blind holes, concave part and the pin key, strengthen rib plate, surface knurling and so on, with to features of parts are unable to use conventional powder metallurgy method, precision casting process of.          

From the traditional powder metallurgy, metal injection molding industry in full swing in recent years, the domestic powder metallurgy industry seems to be growing. But horizontal comparison of the manufacturing process industry, powder metallurgy, metal injection molding in particular, the market is still just the tip of the iceberg. The number of products and the value of enterprise production, not to mention the "substantial".

The development of metal powder injection molding is influenced by several key factors.

a new type of forming technology, the development of metal powder injection molding is affected by several key factors. These factors determine the development prospects, development speed and development trend of the technology. These factors are well studied, can promote the further development of metal powder injection molding, and can not solve the problem of the development of the resistance.          

Metal injection molding technology of the material composition, including metal powder and binder two parts. Simply put, the powder metallurgy and metal binder in certain proportion, according to the provisions of feed mechanism and order in under the action of high temperature and shear stress were mixing and uniform structure of feeding and the granulator granulation. Due to the presence of binder, granulating material in the injection molding machine injection has good rheological property, can be filled completely to the cavity of the mold. After the forming, the body is obtained by taking off the organic component of the body and sintering the densification process, and the product can be obtained.          

From the seventies of the 20th century to the present only lasts for a few decades time, metal powder injection forming technology has made considerable development and progress, but from the development also exposed some of the shortcomings of current technical route and process route. These deficiencies in the objective to prevent the technology to a deeper level of development. So it is urgent to solve these problems.

The principle of powder metallurgy

Powder metallurgy is the preparation of metal powder or with a mixture of metal powder or metal powder and metal powder) as raw material, through forming and sintering, preparation of metal materials, composite materials and products of various types of industrial technology. With the popularity of powder metallurgy products in the market, the principle for the majority of users are more concerned about the technology of powder metallurgy. So ZCMIM today to explain: the principle of powder metallurgy, up to understand it:

1, the production of raw materials, we will according to the specific use of the product to determine the powder metallurgy processing of raw materials, there are many different types of metal powder and a variety of metal powder has different performance, processed products also has different performance, only to choose a good production of raw materials, to produce the most suitable products.

2, press forming and by selecting the raw materials to produce we can carry on production and processing, will be selected out of the metal powder by a professional mold for molding and forming method of the general with compression molding and compression molding.

3, after forming the needs of products after sintering process can make produced have better mechanical properties, more in line with the needs of the user. In general, we can use two methods of unit system sintering and multiple sintering to carry out the sintering process of powder metallurgy products.

4, sintering after treatment, due to various kinds of powder metallurgy products, so some need to carry out some of the sintering process, in order to meet the needs of users.

Powder metallurgy Damascus steel smelting products are very popular

Damascus tool steel is mainly used for cutting tools in various forms, from the shape of the limit. People use it as a hunting knife, used to peel, flesh, very easy to use; can also be made into a small knife, carry, had cut the rope, cardboard boxes and other things can use it easily calm. Although these things with common tools can be completed, but in Damascus, the feeling is not the same. And others use it to make traditional longswords, light steel will cost thousands of dollars and extravagance.

Now, made by powder metallurgy Damascus steel jewelry jewelry is very popular. From the style, the name "Damascus steel" shows a kind of martial spirit, and therefore more suitable for men to wear. If a man is always wearing the gold and silver, may let a person feel less masculine, and wear of the Damascus steel jewelry will not have this "side effects." From the raw material price, powder metallurgy jewelry of Damascus steel and silver prices of similar, but silver products, scrap collected can still use, and Damascus steel scrap completely into the scrap iron, so the product price is higher than that of silver.

Powder metallurgy jewelry of Damascus steel can also be used to make a variety of products, such as tableware, automobile, furniture accessories. It is said that the country has mobile phone producers in preparation for the development of the mobile phone shell of Damascus steel.

Traditional Damascus steel according to the genesis is divided into two kinds: the first is casting Damascus steel, also known as wootz steel, in ancient India, the lines are in the casting process of crystallization, and now have been lost; the second is forging modeling Damascus steel, welding lines of steel is also known, the lines by two or more than two kinds of folded steel forging play and.

This technology is widespread, various regions of the world are in use, but the style is different. But in modern times, the traditional Damascus steel in both performance and cost are not rivals of stainless steel products. However, in Damascus steel tends to decline when using the new technology of powder metallurgy in contemporary Damascus steel into sight, make people re application of this ancient steel saw hope......