On the process of powder metallurgy forming technology

A lot of metal can be formed by powder metallurgy, so each aspect of the product is still a good performance, in the molding process, will involve a lot of relevant parameters, which and powder metallurgy forming effect are has a lot to do with. To this end, a small series to study the whole process of powder metallurgy.

Metal powder metallurgy molding is mainly used to complete the welding, the process of the electrode, the role of the pressure, the set of these parameters and the size of the workpiece, the specifications and the effect to achieve. In order to ensure the forming structure meet the requirements, welding process is also very important, with the use of numerical control technology, welding in the process of horizontal movement speed of electrode, electrode feeding time and initial PU powder thickness can get precise control.

In general, the powder metallurgy technology can effectively overcome the workpiece produced in the process of some adverse effects, and the work efficiency have significantly improved, even forming quality and accuracy have improved a lot.

What are the advantages of powder metallurgy products?

In recent years, the powder metallurgy industry in the market to fight the fiery, but the metal powder metallurgy which has the advantages of it? Want to know with the Shenzhen MIM manufacturers ZCMIM together to see it!

1. The yield is high, for example to make a gear, the general gear shaper, gear hobbing and other machine to cut off a lot of material, powder metallurgy is not.

2 high melting point materials can be processed, tungsten and molybdenum are almost all produced by the powder metallurgy method, because the melting point is too high and it is difficult to be melted.

3 can be made of porous materials, such as oil bearing, can be stored oil.

4 high production efficiency, because you do not need to machine processing can produce complex shape. Used for small size parts.

5 suitable for making metal matrix composites, such as tungsten / copper composites.

In recent years, the average annual growth rate of powder metallurgy products in China is over 15%

A lot of metal forming processes are closely related to the development of materials and powder metallurgy. Powder metallurgy is the process of metal powder as raw material, through the forming and consolidation, the manufacture of metal materials, composite materials and products. The development and production of high performance metal powder plays an important role in improving the properties of powder metallurgy materials and products and promoting the progress of powder metallurgy technology.

In all kinds of metal powder, high purity iron powder is powder injection molding is an important one of the raw materials, consumption accounts for about the powder metallurgy industry with 70% of the amount of powder, which reduced iron powder due to having a porous, with irregular morphology, forming and good green strength is high pressure, in divided into auto parts, compressor parts, sintered bearing, electric tool parts and electronic components production become irreplaceable raw materials.

Statistics show that in the last 5 years, the average annual growth rate of China's powder metallurgy products is 15.4%, the average annual growth rate of sales revenue is 16.2%. In 2013, the total sales volume of powder metallurgical machinery parts in China has reached more than.

What are the advantages of powder metallurgy and casting and machining?

Powder metallurgy is the preparation of metal or with a mixture of metal powder or metal powder injection and non metal powder) as raw material, through forming and sintering, manufacturing metal materials, composite and products of various types of technology. What are the advantages of powder metallurgy and casting process? Shenzhen MIM manufacturers to give you talk about.

1, to casting

Advantages are high efficiency, low energy consumption and high precision. Can do a very small volume of things. Low cost.

2, on the machine plus

Advantages in large quantities, low cost of manufacturing complex parts, good consistency, high efficiency

Define for MIM

MIM is a high-tech technology (metal injection molding) which is a traditional powder metallurgy and plastic injection molding process combined with the. Metal powder injection molding technology is a product of plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials science and other disciplines of infiltration and cross. 

MIM technology overcomes the traditional powder metallurgy products’ weak point,like low density, inhomogeneous materials, mechanical performance is not high, not easy to complex pieces of thin-wall molding shortcomings .Metal injection moulding technology suitable for mass production of complex products, high precision and high performance requirements of small metal parts.

History of MIM

Kun Hsiung Huang is a professor of Taiwan University which started into the circle of Chinese technology from the German professor at Rensselaer Polytechnic Institute (RPI) of powder metallurgy laboratory in 1985 . 

In 2008, apple began attention to MIM technology and 2011 began using metal injection molding parts replaced traditional die-casting parts as the internal and external parts for apple mobile phone and notebook computers. The MIM industry showed explosive growth in the past five years (2011-2015)

Advantages of powder metallurgy technology

1, the vast majority of refractory metals and compounds, pseudo alloys, porous materials can only be manufactured by powder metallurgy method.

2, due to the powder metallurgical method can be pressed into the final size of the compact, and do not need or need little subsequent mechanical processing, it can greatly save metal, reduce the cost of products. Products manufactured by powder metallurgy, metal loss only 1-5%, and general casting method used in the production, the loss of metal may will reach 80%.

3, due to the technology of powder metallurgy in the production process of the material does not melt materials, not mixed with impurities caused by crucible and deoxidizing agent and sintering general in vacuum and in a reducing atmosphere, not afraid of oxidation nor to any material pollution, so it is possible for preparation of high purity materials.

4, powder metallurgy method can guarantee the accuracy and uniformity of the composition ratio of the material.

5, powder metallurgy is suitable for the production of the same shape and the number of products, especially gear and other high processing costs of products, powder metallurgy process can greatly reduce production costs.

How to avoid the defects in the production of MIM cemented carbide parts

Cemented carbide with high hardness, high strength, wear resistance, high temperature resistance, corrosion resistance and a series of advantages, is an indispensable part of the metal parts of the important material. The traditional production method of hard alloy parts (press forming) can only produce the products with simple shape, which limits the application range of the cemented carbide.

The production process of MIM products is: powder + binder, mixing, granulation, injection molding, skim (MIM), sintering (MIM sintering furnace), and subsequent treatment. In the production of MIM carbide parts in the process, any part of the selection of materials, improper operation of the hard alloy parts are likely to cause defects, then how to avoid this defect?

First, the powder selection process. MIM of cemented carbide powder metallurgy in addition to meet the requirements of its particle size distribution, particle size, purity of the powder to be high, cannot use folders impurities powder, if the powder is mixed with sulfur, phosphorus, silicon and other elements, sintering process in these substances will formation pore and cause of product defects.

Second, production of feed. Hard alloy powder in the process of mixing needs appropriate binder, mixing will hard alloy powder and binder are fully mixed, mixing process must be strict control the temperature, to avoid evaporation of binder and its uneven distribution, the mixed feed made from materials with good rheological properties and viscosity values, to avoid the occurrence of defects in the later part of.

Third, forming part of the green. The hard alloy parts production is also the key link to avoid the defects of products, need to pay attention to in the injection process reasonable control mold temperature, feeding rate, injection pressure, Paul pressure, pressure holding time, injection speed etc., can effectively avoid the defects of injection of the green.

Fourth, skim links. Hard alloy compact degreasing, in degreasing process, if the degreasing furnace heating speed too fast, will cause cracks in hard alloy parts, step by step heating method can be used for degreasing.

Fifth, sintering process. Because of the high density of the hard alloy and the gravity of the liquid phase sintering, the products are easy to deform. The appropriate supporting device can be used for the large size of the product can be selected as a supporting plate shrinkage of the material, in addition, it should be as much as possible to shorten the time of liquid sintering.

MIM can forming complex shape of hard alloy products, with defects in the control of problem solving, MIM technology gradually perfect, the application range of the hard alloy gradually expanded, greatly promoting the development of whole hard alloy industry.

At home and abroad, there are differences in the main application areas of powder metallurgy products

At present, powder metallurgy parts technology has been widely used in the fields of automobile, household appliances, construction machinery, electric tools, etc. However, there are differences between domestic and foreign powder metallurgy products in the main application areas.

From the developed countries or regions of the powder metallurgy product structure, the automobile industry is the largest industry in the powder metallurgy parts industry. Developed countries and regions of the powder metallurgy parts of about 90% are used in the automotive industry. Because the development of China's auto industry is relatively late, and the industry of home appliances and motorcycles developed earlier in China, the product structure of the powder metallurgy industry in China is different from that in the developed countries. Automotive industry is China's largest powder metallurgy parts market, which accounted for of the powder metallurgy parts market increased from 32% in 2014 to 57.8% in 2005, is still far below the level of the developed countries.

The development of China's automobile industry not only provides a huge market demand for the powder metallurgy industry, but also puts forward higher requirements for the technology and quality of the powder metallurgy industry in China. Powder metallurgy auto parts can promote the automobile lightweight, energy-saving emission reduction, with the promotion of the domestic automobile market of sustainable development and energy saving and environmental protection policy, powder metallurgy auto parts market will also enter the new period of rapid development, powder metallurgy auto parts will become the main direction of development of the powder metallurgy industry.

4th industrial revolution to be driven by renewable energy: WEF meeting

DAVOS, Switzerland, Jan. 20 (Xinhua) -- The leaders from various key sectors highlighted the 4th industrial revolution will be driven by renewable energy at the 46th World Economic Forum (WEF) annual meeting, which kicked off on Wednesday in Davos-Klosters, Switzerland.

Under the theme "Mastering the 4th Industrial Revolution", over 2,500 leaders from business, government, international organizations, civil society, academia, media and the arts are participating the event.

In a session titled "Transformation of energy", participants have shared ideas that renewable energy are central to meet the energy demands that the new revolution will bring.

Clean energy now accounts for more than half of all new energy supply, said Fatih Birol, Executive Director, International Energy Agency.

The bulk of new installations, more than two-thirds, come from emerging countries, he added, saying "To meet climate change and growth targets, around 40 percent of future energy supply must come from zero-emission technologies."

Hiroaki Nakanishi, Chairman of Hitachi, said the challenge has moved from having more renewable energy to having better energy systems.

There are distributional challenges that come with the distance between generation sites of wind and solar energy and the load centers.

"A more systematic approach is required to integrate renewable energy sources into an overall smart grid," he stressed.

Over the next 25 years, energy demand will increase by more than 80 percent globally. Huge investments are required across all energy technologies as well as electric grids and distribution systems.

China will play a leading role in this transformation towards green and renewable energy, said Luo Xin, CEO from China's Shunfeng International Clean Energy.

"The country has set an ambitious target that 25 percent of all energy production comes from renewable sources," Luo said. In the meantime, China is already a leading exporter of clean energy technology, for instance, more than 60 percent of the world's solar panels are manufactured in China.

Present situation and market demand of powder metallurgy technology at home and abroad

According to the China General Machinery Parts Association powder metallurgy branch report, 2006 China's powder metallurgy parts and products production increased by 17.5%, reaching about 88000t. Statistical product categories include iron copper based powder metallurgy parts, oil bearing and friction materials. In which the amount of powder metallurgy parts of the automobile market is about 32000t, accounting for 37%, an increase of 28%; power tool market growth of 29%.

The future will show a potential of China's automobile parts in powder metallurgy products market growth spurt. According to statistics, the amount of powder metallurgical products in developed countries accounted for the vast majority of the total production of powder metallurgy products, such as the United States accounted for 90%, 80% in Europe, while China is still less than 40%. European average per vehicle powder metallurgy products usage is 14kg, Japan is 16KG, the United States has reached more than 19.5kg.

The next few years is expected to reach 22kg, while China's current average per vehicle powder metallurgy products are only about 5kg. If calculated according to an annual output of 50 million cars, China's annual auto parts uses about 2.5 million tons of iron and steel powder, if the amount of our country every car powder metallurgy products to reach the European level, and keep car powder metallurgy parts replacement, so only the steel powder will need to nearly 10 million tons, is 1.25 times as much as that of the powder metallurgy total demand.

What are the characteristics of stainless steel parts?

Stainless steel parts can be used in communications, electronics, automobiles, hardware, medicine, machinery, watches and clocks, military small arms industry. Then the stainless steel parts than other metal parts have what advantage?? with this problem, with the Shenzhen powder metallurgical factory ZCMIM with a look at the following content.

1, the appearance of the surface and the possibility of diversification.

2, clean, high degree of finish.

3, good corrosion resistance. Mechanical parts

4, resistant to high temperature oxidation and high strength, so it can resist fire.

5, room temperature processing, that is easy to plastic processing.

6, the surface does not have to deal with, so simple, easy to maintain.

7, high strength, and thus the possibility of use of thin sheet.

8, good welding performance.

Above is the today to explain parts of stainless steel at all, I hope to help everyone in the use of more simple. At the same time, we will make persistent efforts to provide

Application of metal injection molding

Metal powder injection molding is a new technology of powder metallurgy, which is formed by introducing modern plastic injection molding technology into powder metallurgy field. The basic process is: first solid powder and organic binder is mixed uniformly practice. After granulation in heating and plasticizing state (to 150 DEG C) by injection molding machine injection mold cavity solidification and then using chemical or thermal decomposition method will be forming in casting binder removal and the Sintering Densification of final product.

Compared with the traditional process, with high precision, uniform structure, excellent performance, low production cost, its products are widely used in electronic and information engineering, bio medical devices, office equipment, automobile, machinery, hardware, sports equipment, clocks and watches industry, weapons, aviation, aerospace and other industries. 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 ".

MIM laser engraving products (marking / welding)

MIM products laser engraving / marking: laser engraving (also known as laser engraving, laser marking, laser marking, etc.) is an important application of the principle of laser processing, namely the use of after treatment of laser beam irradiation on the surface of the material, light instantly transforms into heat energy, the surface material instantaneous melting and vaporization, thus forming a mark.

Welding: using high energy laser pulses within a small region of local heating of materials, laser radiation energy by heat transfer material guiding the internal diffusion, the molten material after the formation of specific molten pool;

MIM Technology

Metal injection molding technology is a set of plastic forming process science, polymer chemistry, powder metallurgy and metal material science and other disciplines through and cross product, the mold can be injection molded blank and by sintering rapid manufacturing structure parts with high density, high precision and 3D complex shape, can quickly and accurately will design thought to have certain structural and functional properties of products, and can directly produce a large quantity of parts and manufacturing technology industry a new change.

This technology not only has less conventional powder metallurgy process, without cutting or less cutting and economic advantages, and to overcome the traditional powder metallurgy products, inhomogeneous materials and mechanical properties of low, not easy to forming thin-walled and complicated structure of the shortcomings, particularly suitable to mass production of small and complex and has special requirements of metal parts.

MIM postprocessing products run out (magnetic slide, water slide)

MIM postprocessing smoothing - slip magnetic products;

A. needle size according to the specific needs of product selection, selection is based on the products after processing of needle and easy separation of products.

B. choose the length of processing time according to the appearance of the product.

C. in processing powder metallurgy stainless steel 17-4PH is required to use a stick to stir, each processing capacity of selected according to the size of the products, to prevent the product deformation.

Mizutame; the products and materials in accordance with the corresponding proportion goes into the machine in the container, then add the right amount of grinding agent. By using the principle of the centrifuge, the grinding stone and the workpiece have relative motion, so that the grinding grain and the surface of the workpiece are fine cut, extrusion, so that the surface of the workpiece can be obtained.

MIM postprocessing products run out (magnetic slide, water slide)

MIM postprocessing smoothing - slip magnetic products;

A. needle size according to the specific needs of product selection, selection is based on the products after processing of needle and easy separation of products.

B. choose the length of processing time according to the appearance of the product.

C. in processing powder metallurgy stainless steel 17-4PH is required to use a stick to stir, each processing capacity of selected according to the size of the products, to prevent the product deformation.

Mizutame; the products and materials in accordance with the corresponding proportion goes into the machine in the container, then add the right amount of grinding agent. By using the principle of the centrifuge, the grinding stone and the workpiece have relative motion, so that the grinding grain and the surface of the workpiece are fine cut, extrusion, so that the surface of the workpiece can be obtained.

What are the key points to be mastered in the forming process of powder metallurgy products?

Powder metallurgy products, powder metallurgy, metal injection molding

Powder metallurgy products need to be used to the mold, then the products in the process of forming what should be the main point of it?

Metal injection molding powder metallurgy common forming method is in rigid closed mold metal powder compression molding, the mold cost is high; due to poor powder mobility, and by friction, compact density is generally low and uneven distribution, high strength, thin wall, elongated and along the pressing direction was changed for the section of the product is difficult to form. Therefore, the design of the structure of the parts used for pressing and forming should pay attention to the following problems.

1) free from the side walls of the groove and the concave hole, in order to facilitate the compaction or reduction of residual block.

2) avoid along the pressing direction for increasing the cross-sectional area, compaction. The junction of the wall should be rounded or chamfered transition, avoid sharp corners to compaction and prevent the stress concentration caused by mold or compacts.

3) the amount of simple, symmetrical shape, avoid cross section change is too large and narrow groove, spherical and so on, in order to facilitate the mold making and compaction,

4) free local thin for powder compaction and prevent the emergence of crack.

Three important marks and development trend of powder metallurgy technology

The application of powder metallurgy technology in ancient times, the first method of making iron is essentially used in powder metallurgy. And the development of modern powder metallurgy technology, there are three important signs:

1, to overcome the difficulties produced in the process of refractory metal casting, in 1923 powder metallurgy hard alloy was hailed as a revolution in machining.

2, thirty years, the successful preparation of porous oil bearing; and then the development of powder metallurgy iron based machinery parts, and give full play to the advantages of powder metallurgy less cutting and cutting.

3, in the 1940s, metal ceramic, dispersion strengthened materials such as, from the late 1960s to early 1970s, high-speed steel powder, Powder Superalloy have appeared, and the powder metallurgy forging and hot pressing technology gradually large-scale manufacturing parts with complicated shape and high strength.

Development trend of powder metallurgy technology:

1, representative of the iron base alloy, will be to the large volume of precision products, high quality structural components development.

2. High performance alloy with uniform microstructure and difficult to process.

3, with enhanced densification process to produce a general composition containing a mixture of special alloy.

4, the manufacture of non - uniform materials, amorphous, microcrystalline or metastable alloy.

5, the processing of unique and non general form or composition of the composite parts.

MIM process characteristics

MIM combines the advantages of powder metallurgy and plastic injection molding technology, breaking the limit of the traditional metal powder forming process in the shape of the product. MIM using metal powder technology can be characterized by sintering out of the dense, with good mechanical properties and surface quality of mechanical parts.

At the same time, the use of plastic injection forming technology can mass, high efficiency to produce many parts with complex shape features: such as a variety of external grooving, external thread, the tapered outer surface, cross through hole and blind hole and concave part and the pin key, strengthen rib plate, surface knurling and so on, parts with the above characteristics are inaccessible by conventional powder metallurgy method, precision casting process are obtained.

MIM hardness test

MIM commonly used hardness test method has a lot of different hardness measurement methods have their own characteristics and scope of application. The more commonly used is the hardness of Vivtorinox hardness;

The hardness value of HRC can be directly read out, the operation is simple and quick, and the work efficiency is high. However, due to the production of diamond head and measuring mechanism of poor accuracy, the accuracy of the precision is not as good as Vivtorinox. Suitable for bulk parts inspection, can be on-site or production line on the finished product testing.

Vivtorinox hardness; hardness measurement range of Vivtorinox, hardness value of HV, not only can measure the hardness of materials, but also can measure the soft metal and sheet, strip, with high accuracy. But the measurement efficiency is low.

　　　　　　　　　　　　　　　　　　　　　　

Manufacture of gear by powder metallurgy industry

First of all, Shenzhen MIM plant ZCMIM brief description of the basic production process of powder metallurgy process, the first is the preparation of raw materials, the current powder metallurgy method is mainly used in mechanical and physical chemical method.

Mechanical method can be divided into mechanical crushing atomization. The physical chemical method is divided into reduction method, chemical method and electrolysis method. Using powder to form a desired shape. The purpose is to make a certain shape and size. And make it have certain density and intensity. The molding method basically can be divided into two types, compression molding and pressure forming.

Sintering powder metallurgy technology is the key process and after sintering can be molded blank block to obtain a final desired physical and mechanical properties, the sintering temperature should be slightly lower than the melting point of the metal and alloy, for sintered alloy materials, temperature control than the difficult to melt compositions of low melting point, but need to higher than the melting point of the fusible component. The final step is to form, through the processing of equipment will be processed into the required gear products.

Design points of stainless steel powder metallurgy structural parts

1, material selection

The choice of material of stainless steel powder metallurgy parts, in addition to the mechanical properties, should also to select the raw powder of the species and its composition, the density of the material, sintering conditions and subsequent processing in accordance with the requirements of part of wear-resistant, corrosion resistance and other characteristics.

Although, in high alloy powders as raw materials by material of high density and sintering conditions, or the carburizing and quenching heat treatment, the physical and mechanical properties of stainless steel powder metallurgy parts material increased, but parts of the production cost also correspondingly increased. Therefore, in the selection of materials, it is best not to pursue the excessive material properties, and increased production costs.

2, shape design

Stainless steel powder metallurgy structural parts are generally made of metal powder with single axial compression, so the shape of the parts are subject to various restrictions. When designing parts, we must pay attention to overcome these limitations, so as not to increase the production cost of parts or produce quality problems. In addition, the clever use of combination or sintering method, such as the legitimate, but also to overcome some of the limitations of the shape of the parts.

In addition, some parts of the shape of cutting and other methods can not or difficult to make, but it is suitable for stainless steel powder metallurgy process. Such examples are many, such as tooth in motor pulley, the transmission synchronizer gear hub etc.. This kind of parts fully embodies the characteristics of stainless steel powder metallurgy technology.

3, size accuracy

Generally speaking, although can be made very high dimensional accuracy of green compacts, but due to shrinkage or swell produced in the sintering process, powder metallurgy parts size precision reduced. When the size precision of stainless steel powder metallurgy parts can not meet the technical requirements, it is necessary to increase the finishing, cutting, grinding and other follow-up processing. Therefore, to determine the size accuracy of parts, to master the allowable size of each process accuracy, as far as possible to reduce the number of processing procedures, in order to reduce the production cost of parts.

Comparison of import and export of high end powder metallurgy products

Compared with developed countries, the production scale of China's iron powder plant is small, the layout is scattered, the equipment renewal and self-development capacity is insufficient. Many of China's export of iron are general properties of iron, mainly exported to Japan, Korea, Southeast Asia and Hong Kong and Taiwan, while imports of iron mainly from Japan, Sweden and Canada and other countries, imports is iron quality iron powder and special purpose.

Compared with foreign advanced level, the reduced iron powder in China still has a big gap. This gap is mainly manifested in the following two aspects:

One is the reduced iron powder is not stable physical and chemical properties, such as components, Poisson ratio, liquidity, and elastic aftereffect compression index fluctuation;

Two is the lower end of the reduction of iron powder, high-end powder series varieties, and more dependent on imports.

The MIM powder metallurgy after recent years of development, varieties of iron powder is obviously increased, but still can not catch up with market demand. This has seriously affected and have limited the development of China's high-end powder metallurgy industry and products. This shows that China is a big country in the world, but it is not a powerful country.

High performance metal powder market share is increasing

China is a big country in the world, the rapid development of the national economy is a great demand for high and new materials, especially the rapid development of automotive and electronic industries, the demand for high-end powder metallurgy products is strong.

In addition, countries in the world are constantly strengthening the research and development and application of 3D printing technology, the United States and some European Union countries have led the world 3D printing technology, and in the application and promotion of the technology to get the initiative. Powder metallurgy forming technology to make the powder "grow into" parts, for the development of 3D printing technology provides a convenient, boost metal powder metallurgy into a power of the industry.

In recent years, enterprise of our country iron through in the production of grasp quality, grasping the marketable products, generally improve the quality of iron powder, also opened the hedonic price gap. At present, the status quo of the domestic iron powder market is high quality iron powder and special use of iron powder in short supply, the production of surplus products, high-end powder metallurgy products still need to be imported from abroad.

The microstructure of products is uniform, high density and good performance.

In the pressing process due to the friction between the wall of the mould and the powder and powder and powder, the pressure distribution is very uneven, resulting in the pressed blank in the microstructure is not uniform. This will cause pressed powder metallurgy parts in sintering shrinkage is not uniform, so we had to reduce sintering temperature to reduce this effect, so that products of porosity, material density, low density, seriously affecting the product mechanical properties.

Whereas the injection molding process is a kind of fluid molding process, adhesive guarantee the powder evenly distributed which eliminates the uneven microstructure of blank, and sintering the density of the products can reach to the theoretical density of the material. In general, the density of the product can be compressed to a maximum of 85% of theoretical density. The high density of the product can increase the strength and toughness, and the ductility, the conductive heat conductivity and the magnetic properties can be improved.

High efficiency, easy to achieve large quantities and large-scale production of MIM technology using the metal mold, and its life and engineering plastic injection molding tool quite. Due to the use of metal molds, MIM is suitable for the mass production of parts. Due to the use of injection molding machine is blank, greatly improves the production efficiency, reduces the production cost, and the injection molding product consistency and repeatability, to provide a guarantee for large batch and large-scale industrial production.

Application materials a wide range, the broad field of application (iron, low alloy, high speed steel, stainless steel, G valve alloy, hard alloy) can be for injection molding material is very extensive, in principle any, including traditional manufacturing process of difficult to machine materials and high melting point materials, pouring hot junction of powder materials can be by MIM process caused by parts. In addition, MIM metal injection molding can also be based on the requirements of the user material formulation research, manufacture any combination of alloy materials, the composite material into parts. The application field of injection molding products has been widely used in various fields of national economy, and has a broad market prospect.

Application of powder metallurgy material for iron powder

In powder metallurgy industry, high purity iron powder is dosage is the biggest, the most widely used metal powder, accounting for the powder metallurgy injection with 70% of the amount of powder can be said of high-purity iron powder production technology, scale, variety and quality in a certain extent, reflect the overall development of powder metallurgy industry.

Compared with tiejingfen, regardless of price, market performance, high performance materials, metal powders have the incomparable advantages. Emerging metal materials are made from metal powder, powder metallurgy make its performance has been greatly changed. For example, molten steel and molten iron at high temperature is difficult to mix together, but the two are easy to mix together, and the metal structure will be changed, the more resistant to high temperature, resistance to cold.

At present, the high-purity iron powder production method mainly [reduction method, spraying method, electrolysis and carbonyl]. The reductive method is low cost, large output, low energy consumption, and has porous morphology, irregular, good formability and green strength is high pressure, in the production of auto parts, compressor parts, sintered bearing, electric tool parts and electronic components such as become irreplaceable raw materials, so the reduction method is one of the main production technique of high purity iron, reduced iron powder has been powder metallurgy industry the main raw materials.

Development direction of high performance powder metallurgy products

Since the beginning of this century, China's economic development has led to the rapid development of the powder metallurgy industry, mainly for the production and varieties increased significantly, and has been higher than the growth rate of GDP development.

With the development of market economy, in recent 10 years, in China's iron quality have greatly improved, mainly improve the total iron content in the finished product of iron, further reducing the oxygen, carbon, acid insoluble matter and other harmful impurities, the increase of the compression performance, varieties and grades increased to more than 20.

Industry insiders have suggested, the future in accordance with national standards for the production of the product types and brands, should also gradually increase the alloy powder, pre alloyed powder, easy cutting powder, iron powder, high wear resistance of powder, no segregation of mixed powder and high technology content, high performance iron powder production, in order to meet the needs of the domestic market, and expand exports to Japan, the Middle East, Southeast Asia and other places.

Performance and cost analysis of injection molded products

MIM process using micron grade fine powder, can not only accelerate the sintering shrinkage, help to improve the mechanical properties of the material, prolong the fatigue life of the material, but also can improve the resistance, stress corrosion resistance and magnetic properties.

The application fields of MIM technology include:

1 the computer and its auxiliary facilities: if the printer parts, core, a shaft pin, driving parts

2 tools: such as drill, cutter head, nozzle, gun drill, spiral cutter, punch, sleeve, wrench, electrical tools, hand tools etc.

3. Household appliances: such as watchcase, watch chain, electric toothbrush, scissors, fan, golf head, jewelry chain, ball point pen card first hoop, a knife cutting tool parts

4 medical machinery parts: such as orthopedic rack teeth, scissors, tweezers

The 5 part: military missile wing, gun parts, warhead, liner, fuze parts

6 electrical components: electronic packaging, micro motors, electronic parts, sensors

7 mechanical parts: such as loose cotton, textile machine, crimping machine, office equipment etc.;

8. Automobile and ship parts: such as the clutch inner ring, fork sleeve, distributor sleeve, valve guide, synchronous hub, airbag parts.

Stainless Buckle For Custom Quartz Stainless Steel Case Back Watch

Quartz Stainless Steel Case Back Watch

Stainless Buckle  

Custom Quartz Stainless Steel Case Back Watch

Website:  www.zcmim.com   

Tel：15012709260

QQ:  3247389486    

E-mail：sales2@zcmim.com

Skype:  allysha-yuan

MIM technology suitable for precise and complex metal products with special performance requirements. ZCMIM Supply metal products like industrial parts, medical accessories, tool accessories, fishing accessories, mobile phone accessories, electronic accessories, watches accessories.

Comparative characteristics of MIM technology and other processing technology

MIM feedstock powder size used in the 2-15μm, while the original powder metallurgy powder size mostly in the tradition 50-100μm. Finished high density MIM process, because the use of a fine powder. MIM process has the advantages of traditional powder metallurgy process, and high degree of freedom in shape is the traditional powder metallurgy can not be achieved.

Traditional powder metallurgy limited strength and packing density of the mold, mostly two-dimensional cylindrical shape traditional casting off the dry process production of complex shape of the product as a very effective technique, in recent years the use of ventricular assist pottery can be done slit deep hole The finished product, but because of the strength of the pottery of the heart, as well as casting liquid liquidity constraints, the process still has some technical difficulties.

In general, this process of manufacturing large and medium-sized parts more appropriate, small and complex shaped parts MIM process is more suitable places. Comparison Project MIM manufacturing process of traditional powder metallurgy process powder particle size (μm) 2-1550-100 relative density (%) 95-9880-85 Product weight (g) of less than or equal to 400 g 10- Hundreds of three-dimensional shape of the product of complex shape Simple mechanical properties of two-dimensional shapes and compare the merits of MIM process die-casting process using conventional powder metallurgy aluminum and zinc alloy low melting point, good fluidity casting liquid material. The product of this process due to material limitations, its strength, wear resistance, corrosion resistance are limits.

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ZCMIM is specialized in iron, stainless steel, carbide, high density tungsten alloy, aluminum, copper and other metal powder metallurgy materials, injection molding product development, production and sale of high-volume production of precision, three-dimensional complex shapes and a special performance requirements of metal parts.

MIM technology suitable for precise and complex metal products with special performance requirements. ZCMIM Supply metal products like industrial parts, medical accessories, tool accessories, fishing accessories, mobile phone accessories, electronic accessories, watches accessories.

Historical origin MIM technology

California Parmatech invented in 1973 in the early 1980s in many European countries and Japan have invested great effort began to study the technology, and the rapid promotion. Especially in the mid-eighties, but get this technology to achieve rapid industrialization since the development are increasing at an alarming rate every year. So far, the United States, Western Europe, Japan and other countries and regions, more than 100 companies engaged in the technology of product development, research and marketing.

Japan in the competition is very positive, and outstanding performance, many are involved in the promotion of large-scale Corporation MIM industry, these companies include Pacific Metals, Mitsubishi Steel, Kawasaki Steel, Kobe Steel, Sumitomo Mining, Seiko - Epson, Datong Special steel. Japan currently has more than forty companies specialized in the MIM industry, the total value of its sales of industrial products, MIM has already exceeded catching up with Europe and the United States.

So far, the world has the technology hundred companies engaged in product development, research and sales work, MIM technology has thus become the most active of the new cutting-edge manufacturing technology, is the world's pioneering technology metallurgical industry, representatives the main direction of the MIM process powder metallurgy technology.

Metal powder injection molding technology is a set of plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials science and other disciplines through the cross product of injection molding using a mold can be blank and rapid manufacturing by sintering high-density, high-precision , three-dimensional structure of a complex shape parts, can be quickly and accurately design ideas materialized into a certain structure, functions and features of products and direct mass-produced parts, the manufacturing technology industry a new revolution.

The technology not only has the less conventional powder metallurgy process steps, no cutting or less cutting and economic advantages, but also to overcome the traditional powder metallurgy technology products, non-uniform materials, low mechanical performance, easy molding of thin-walled, complex structural shortcomings, particularly suitable for mass production of small, complex and metal parts with special requirements. Process binder → mixing → injection molding → degreasing → → after sintering process.