What are the signs of the rapid development of industrial technology in powder metallurgy?

The rapid development of the technology of powder metallurgy industry, of China's metallurgical industry put forward more requirements, conventional metallurgical techniques with high hardness, low purity, precision and poor shortcomings, can not meet the industry demand, after several years of technical study, released a new powder metallurgy technology more competent industry demand, it is with metal powder or metal powder and metal powder mixture) as the raw material, after forming and sintering, manufacturing metal materials, composite and products of various types of technology.

From time to time through the combination of the introduction of foreign advanced technology and independent innovation development. In recent years, powder metallurgy industry and technology of China are showing a trend of high speed development, industry one of the fastest growing parts of China general machinery industry, every year, the powder metallurgy industry, the output value of 35% speed increments.

The global manufacturing industry is accelerating the transfer to China, the rapid development of automobile industry, machinery manufacturing, metal industry, aerospace, instrumentation, hardware tools, construction machinery, electronic appliances and high-tech industries such as, for the powder metallurgy industry brought rare development opportunity and huge market space.

In addition, powder metallurgy industry has been included in the China priority development and encourage foreign investment projects. Therefore the development of powder metallurgy industry is very broad prospects. Traditional metallurgical export high yield, for example to make a gear, the general gear shaper, gear hobbing and other machining to cut off a lot of material, powder metallurgy is not.

At present, the powder metallurgy technology commonly used in the production of porous materials, such as oil lubricated bearings, oil storage. The production efficiency is high, because there is no need for machining complex shape can be produced. For small size parts. Suitable for the production of metal matrix composites, powder metallurgy products, compared with the traditional roasting process, not only reduces the cost of manufacturing process, also a lot of precision.

Metal injection molding mold design MIM

MIM (metal injection molding) mold design is not a simple task, tolerance and strict, need to pay special attention to the details of the complex, all this is like climbing to the peak of an iceberg, very difficult.

High precision, super high tolerance without flash, surface quality, all of these standards are some requirements must meet the manufacturing process of metal parts die casting die. There is no doubt that the metal mold manufacturers to reach this level although there are a few, but very few, however, for this industry companies, is "profitable".

First of all, the mold design should have a good plan. Shenzhen ZCMIM company's engineers had pointed out, "because it is the foundation and the key to success. It should include excellent cooling water circuit layout and parting line lock locking device, to prevent the dislocation of production and processing of mould, a deputy to good support of mould cavity and core sidewall mold frame, a suitable for specific parts demoulding method. "

The basic structure and the injection mold MIM mold is similar, only a few exceptions. Including steel mould cavity and core, close the angle with the selection of member and the slider, materials with good liquidity of the runner system design, gate location, ventilation depth, molding shaping region of the surface quality and its applications in coating mould cavity and core details correct choice. " Our company engineer told Xiao Bian, and detailed these views. Because of the many mold manufacturers according to the general design began to manufacture the mold, so when the mold manufacturing, machinery and tooling division they give workers many degrees of freedom design details. But this method of MIM mold manufacturing is invalid.

MIM molding mold manufacturers and workers not to observe a mold layout, their main task is to study and observe a set of detailed drawings. They spend more time in front of mold design details, so the successful operation of the mold to obtain the spent less time. The details of the design, including the selection of die materials and mould cavity tolerances, surface quality and coating, gate and runner size, vent position and size, position of pressure sensor. After the successful production of MIM mould, demoulding and cooling has become a key problem.

Metal powder injection molding machines and other equipment are constantly innovation and development

With development of product and forming process, forming equipment is also in constant innovation and development, focus on the development of modern injection molding machine is to control, in order to improve the level and degree of automation of the machine, and machine optimization design and processing technology improvement and meet the requirements of injection molding machine quality and saving energy. The development trend of modern injection molding machine is summed up as follows.

(1)功能专门化和价格低廉化在生产实践中，由于制品形状和塑料品种的不同，常常对注射机有一些特殊要求。例如，从制品方面来讲，有的有嵌件，有的无嵌件，有的是单色，有的是双色;从塑料品种来说，有的是热塑性塑料，有的是热固性塑料。因此，开发适合用户要求的特殊和专用注射机，具有性能价格比高、技术密集和结构简化等特征。例如，气体辅助注射设备、可熔芯注射设备、磁石与金属粉末注射机等。

(1) functional specialization and low price in the production practice, the product shape and plastic varieties, often have some special requirements for injection machine. For example, from the product side, there are some inserts, some without insert, there is some monochrome, two-color; from plastic varieties, some thermoplastics, some thermosetting plastics. Therefore, special and special injection machine suitable for the development of user requirements, with a higher ratio of performance to price, technology intensive and simplified structure characteristics. For example, gas assisted injection equipment, fusible core injection device, magnet and metal powder injection machine etc..

(2)高速、高效和精密化开闭模的速度快，模具的开闭速度从20—30mm/min，增加到40—50mm/min，有的甚至高达60mm/min。注射速度快，从100mm/s提高到450mm/s，对于中小型注射机注射速度达600mm/s的已不算罕见，有的可达900mm/s。

(2) high speed and high efficiency and precision of the die opening and closing speed, mold opening and closing speed from 20 30mm/min increased to 40 50mm/min, some even as high as 60mm/min. The injection speed is increased from 100mm/s to 450mm/s, for small and medium sized injection speed injection machine of 600mm/s is not rare, some up to 900mm/s.

以中小型注射机为主，同时发展大型和超大型甚至巨型和微型注射机。锁模力达40MN、50MN、甚至更大的大型注射机已经问世。原西德制造的锁模刀达50MN的注射机，注射量24.5kg，注射压力为140—370MPa。日本名机制作所制造的大型注射机，锁模力120MN。目前，普通、精密和超精密注射机的成型精度已经达到0.02—0.05mm、0.01—0.02mm和小于0.001mm。

In the small injection machine, at the same time, the development of large and super large or giant and micro injection machine. 40MN, 50MN, locking lidamycin and even large injection machine has come out more. The injection machine made by Germany locking knife up 50MN, 24.5kg injection volume, injection pressure of 140 - 370MPa. Large injection machines in Japan were produced by machine manufacturing, clamping force 120MN. At present, ordinary, precision and ultra precision injection molding machine precision has reached 0.02 0.05mm, 0.01 0.02mm and less than 0.001mm.

(3)自动化自动化生产是保证制品质量、提高生产率、降低劳动强度、改善劳动条件、充分发挥设备利用率、降低成本的重要途径。目前，采用许多新型控制装置，如可编制程序控制器(PLC)取代传统的继电器。编程器控制。工作可靠，程序可以灵活修改。微型计算机已用于注射机的过程控制和工艺参数的控制，这种新的控制方法对于成型精密制品特别重要，它能够自动调整成型条件，保证制品的尺寸和质量。对于生产一般制品的机器，其生产过程从加料到取出制品的检验包装也都是自动进行的。机器的安全由安全装置来保证，不但可以自动化，而且可集中管理，实现无人操作。

(3) automation production is to ensure product quality, improve productivity, reduce labor intensity, improve working conditions, make full use of the equipment utilization rate, reduce the cost of an important way. At present, with many new control devices, such as programmable controller (PLC) to replace the traditional relay. Programmer control. Reliable work, can easily modify the program. Microcomputers have been used for injection machine process control and process parameter control, this new control method for precision molding products is particularly important, it can automatically adjust the molding conditions to ensure the size and quality of the products. For the production of general machine products, the production process from feeding to remove the product inspection and packaging are done automatically. To ensure the safety of the machine by a security device, not only can be automated, and centralized management, realize unmanned operation.

(4)其他机械结构设计采用先进的方法、构思及手段，合模方式以肘杆和直压式为主，改进合模机构，形成标准化系列;主机外观及形状优化设计，降噪，注射机配套设备的标准化、系列化以及注射机的模块化，发展环保型注射机等已引起注射机生产厂家的重视。

(4) other mechanical structure design using advanced methods and ideas and means, clamping way to toggle rod and direct pressure, improved clamping mechanism to form a series of standardized; host appearance and shape optimization design, noise reduction, the modularity of the injection machine and ancillary equipment standardization, serialization and injection machine, development of environment-friendly type injection machine and other has caused the attention of the injection molding machine manufacturers.

The application of metal injection molding in the field of mobile phone

Metal injection molding is used more and more widely, in which the mobile phone began to use the metal injection molding technology. Because of the market of lighter, thinner and more beautiful mobile phone, need to use the best technology to reduce the size of the mobile phone, a mobile phone company is seeking to create mobile phone assembly parts by metal injection molding method.

某手机品牌总裁在午餐会上说：“我们的第一个金属手机是采用铝制造，我们发现为了满足所有的要求，金属注射成形方法是最好的，在很多情况下也是唯一的选择”。但是该公司并不将金属注射成形零件作为首先材料，因为手机的市场寿命很短，样式变化很快，而金属注射成形方法的生产周期长，生产成本也较高。

A mobile phone brand president at the luncheon, said: "we first metal 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 the company is not the first material as parts of 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.

现在手机中有几种零件是采用金属注射成形方法制造的，例如：采用钨制造的振子平衡重量，采用高强度钢制造的铰链，金属注射成形方法在手机中最重要的应用是制造滑道、圆桶和铰链。其公司总裁说：“金属注射成形方法的优点及金属注射成形技术的提高会增加其在手机制造中的应用，手机制造行业对金属注射成形方法缺乏了解影响了应用”。

Now the phone has several parts is by metal injection molding manufacturing method. For example: the manufacturing tungsten vibrator balance weight, use made of high strength steel hinges, metal injection forming method in mobile phone is one of the most important application is to create a slide, barrel and a hinge. The president of the company said: "metal injection moulding method and metal injection moulding technology improvement increases with its application in the manufacture of mobile phones, mobile phone manufacturing industry of metal injection moulding method lack of understanding of the impact of the application".

现在金属注射成形方法只是用来制造一些结构和功能比较复杂的手机，如带翻盖的手机。该公司总裁说：“从制造时间和费用考虑，制造普通手机不宜采用金属注射成形零件”。

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

此从这个事件可以看出，粉末注射成型的应用面开始更为广泛。其技术也越来越纯熟，随着社会国民经济的发展，粉末注射成型将迈上更高一个层次。

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

ZCMIM introduce

ZCMIM located at Songgang powder processing plant, is one of the metal powder injection molding process (MIM, PIM process) for the foundation, development and production of electronic communication, glasses Parts, auto parts and vehicle powertrain, confidential machinery parts and components enterprises. With the size of processing equipment including vacuum sintering furnace, furnace, vacuum degreasing Catalytic Debinding sintering furnace, injection molding equipment, more than one batch production with a high level of spare parts.

MIM can describe the product surface processing

Surface processing refers to the surface of the base metal through various methods (mechanical, chemical, electrochemical, physics and so on), the formation of new surface layer on the substrate. This new layer surface is designed to the people, therefore, whether the state of the metal matrix suitable for surface processing requirements is very important. Surface treatment is usually surface adjustment (grinding, polishing, sandblasting, eaves gutter, CNC high light etc.), surface cleaning (in addition to wax, degreasing, cleaning, etc.), surface conversion film processing (chemical oxidation, chemical passivation, phosphating etc.), metal coloring (electroplating, PVD, fuel injection, electrophoresis, etc.).

The advantages of MIM products are those?

Process of metal powder injection molding (MIM) is a new manufacturing technology combined with powder metallurgy and plastic injection molding technology, as a kind of near net shape forming technology to produce high quality of precision parts, MIM technology in powder metallurgy and machine has an unparalleled advantage, MIM can production quantity is larger and more complex parts, such as parts outside notching and tapping, conical surface, perforation, blind hole, concave, a key pin, stiffened plate, surface and rolling flower, these are ordinary powder metallurgy processing to achieve that MIM can be finished at one time, greatly shortening the processing procedure.

MIM injection molding

Injection molding machine injection molding process using MIM and commonly used injection molding machine is the same. Because the sintered products will reduce about 20%, so it is necessary to consider the shrinkage in mould design. In the injection molding machine, raw material melting, and then injected into the mold cavity, cooled and solidified into the shape of the product, then the product ejection, cleaning the cavity, thus completing the product molding;

Metal powder micro injection molding

Traditional powder injection molding technology, can be made to 01 ~ 1mm size parts, has made the smallest 20mg parts. But with the development of the micro system, including micro optics, minimum damage to the surgery and micro fluidic technology, the need for complex shape, size in the micron range of metal and ceramic parts. Micro injection molding is suitable for mass production of micro structure parts.

Germany 10 years ago began to study micro injection molding technology, but the raw materials for thermal plastic plastic, the small size has reached 0.2 um. The German research foundation, is studying the micro metal injection molding technology and micro ceramic injection molding. The powder is used as the average particle size of 15 mu m carbonyl iron powder, 4 to 5 m stainless steel powder and 0.6 m of aluminum oxide powder. The binder has self mixing polyolefin / wax compound and normal compound. In the study, the method of removing binder has the heating removal of organic compounds, the catalytic removal of the aldehyde compounds and the supercritical carbon dioxide desorption method.

After the system, the density of the product is 98%, and the linear shrinkage is 15% ~ 22%. The smallest micro ceramic injection molding structure with a size of 10 m, micro injection of ceramic gear weight is only 0 5mg, the smallest micro metal injection molding parts size of 50 m. Micro injection molding for micro pump, micro gear, micro turbine, minimal damage surgery, micro catheter, etc.

What are the main functions of powder metallurgy technology?

The powder metallurgy technology can be directly made into porous, semi dense or fully dense materials and products, such as oil bearing, gear, cam, guide rod, cutter, etc..

(1) powder metallurgy technology can reduce the segregation of alloy components and eliminate the coarse and uneven casting structure. In the preparation of high performance rare earth permanent magnetic materials, rare earth storage hydrogen materials, rare earth luminescent materials, rare earth catalyst, high temperature superconducting materials, a new type of metal materials (such as Al Li alloy, heat-resistant Al alloy, super alloy, powder corrosion resistance of stainless steel, high-speed steel powder, intermetallic compounds for high temperature structural materials) has an important role.

(2) can be prepared in amorphous and microcrystalline, crystal, nano crystal and super saturated solid solution and a series of high performance non equilibrium materials. These materials have excellent electrical, magnetic, optical and mechanical properties.

(3) it is easy to implement various types of composite, give full play to the characteristics of each component, and it is a kind of low cost technology for producing high performance metal matrix and ceramic composite materials.

(4) can produce ordinary smelting method can produce with special structure and properties of materials and products, such as a new type of porous biomaterials, porous separation membrane materials, high performance structure ceramic abrasive and ceramic materials and other.

(5) can achieve near net shape forming and automated mass production, so that can effectively reduce the production of resources and energy consumption.

(6) it can make full use of ore, tailings, steel making sludge, steel rolling scale, recycling of scrap metal as raw materials, is a kind of new technology which can effectively carry out the material recycling and comprehensive utilization.

All the above are the characteristics of powder metallurgy, powder metallurgy technology has significant energy saving, material saving, excellent performance, high precision and good stability, and a series of advantages, is very suitable for mass production.

Diamond grinding polishing should pay attention to what aspects?

Diamond polishing should pay attention to what?

(1) the polishing must as far as possible in the light under the pressure of pre hardened steel parts and especially polishing with a fine abrasive polishing paste. In the use of #8000 polishing paste, the commonly used load for 100~200g/cm2, but to maintain the accuracy of this load is difficult to do. In order to easier to do this a little can do a thin and narrow handle in the wood, such as with a copper sheet; or in the bamboo trim part and make it more flexible. This can help to control the polishing pressure to ensure that the mold surface pressure will not be too high.

(2) when a diamond is used for grinding and polishing, it is not only the working surface, but also the worker's hands must be carefully cleaned.

(3) each polishing time should not be too long, the time is short, the effect is better. If for too long will cause the polishing process of the "orange peel" and "pitting".

(4) in order to obtain high quality polishing effect, it is easy to heat the polishing method and the tool should be avoided. For example: polishing polishing wheel, polishing wheel heat generated is likely to result in the "orange peel".

(5) when the polishing process is stopped, it is important to ensure that the surface is clean and carefully remove all the grinding agents and lubricants, and then spray a layer of mold anti rust coating on the surface.

Polishing technology is still the main reason why the polishing quality is influenced mainly by the mechanical polishing. In addition, also with the mold material, polishing before the surface condition, the heat treatment process and so on. The quality of steel is a prerequisite for good polishing quality, if the hardness of the steel surface is uneven, there are differences in the characteristics, often resulting in the difficulty of polishing. All kinds of inclusions and air holes in steel are not conducive to polishing.

Research progress of cemented carbide MIM Technology

Cemented carbide injection molding, powder injection molding, MIM technology, injection molding(www.zcmim.com)

As early as in 1977 Curry obtained using paraffin wax as the binder of cemented carbide injection molding technology patents, and later transferred to the Leco company, becoming the Leco process. But due to single component wax binder will lead to skim over a long period of time, it is easy to produce defects and other issues, the scope of the patent has little effect on. But in the 1980s, with the breakthrough of MIM in adhesive formulations, degreasing technology, which on hard alloy injection forming technology matures provides strong technical support, coupled with hard alloy injection molding technology of its unique advantage, from the early 1980s is within the scope of world emerged a group engaged in hard alloy injection forming production and research of the manufacturers and research institutions.

Leco Carbide Corporation of the United States under the Leco Corporation of a branch, the company is the first to use injection molding method of production of carbide products company. The company adopts two kinds of production methods of WC based hard alloy, a kind of is suppress the traditional sintering method, products accounted for 60% of sales; another is the new hard alloy injection molding) carbide injection molding) method, the product sales accounted for 40%. The company's CCIM product weight in the range of 0.3-2kg, the maximum diameter of 10.59 inches.

The company is said to be the world's largest manufacturer of hard alloy injection molding products. German MIM company from the beginning of the 80's Degussa research, 1986 officially out of the product. They used polyethylene, polypropylene, polystyrene, thermoplastic plastic and wax, resin and other special additives mixture for forming agent, the with about 0.8 m of WC Co alloy powder mixed and granulation, injection molding, binder removal and fired. The company is mainly engaged in the feed rack as well as the cutting tool of the whole or the first - class production.

Now they have been able to follow the requirements of the user to carry out a small batch of multi variety, multi material production. The largest volume of the product is 1000cm3, the longest is 100mm, the maximum weight is about 100g, the deviation of the product is about 0.3%, the thickness is 1-5mm, the final density can reach more than 95% of the theoretical density. Also Forn physical company production of tungsten carbide base hard alloy rotary chisel, binders binary above, the first component with chemical solvent extraction removal, residual thermal plastic binder in sintering removal. Many other manufacturers such as Singapore Phimax company, IBM, all parts of the country, such as Qingdao, Shanghai, Beijing, Shenzhen, powder injection Manufacturing Co., Ltd., have invested the CCIM technology research and production, output in steady rise.

Metal lost wax molding process step

Today, what is the point of the metal lost wax molding process?

Step 1: melt the liquid wax into prior preparation of the metal mold (generally used aluminum mold), the formation of a number of parts of the wax after cooling solidification.

Step 2: use the characteristics of the low wax melting point, a single wax components combined into a tree structure.

Step 3: the combination of a good wax tree structure soaked in ceramic slurry.

Step 4: the ceramic surface sprayed with high temperature resistant fire particles.

Step 5: in a 500 -1095 high temperature oven, the inside of the wax will melt and drain away, forming a hollow ceramic tree structure.

Step 6: melt the liquid metal (gray part) into the cavity and fill the hollow cavity of the ceramic.

Step 7: after waiting inside the cavity of the liquid metal completely cooled and solidified, the outer surface of the ceramic shell crack. Finally, the single metal parts from tree cutting separation.

Key points of metal lost wax molding

Now to say the process is: lost wax casting (also known as lost wax method), is a kind of less cutting or no cutting precision casting process. Its application is very extensive. It can not only be used in all types, all kinds of alloy precision casting, and production of casting dimension precision, surface quality than other precision casting method to high, and other precision casting method is difficult to cast the complex, high temperature resistant, not easy machining of castings can be used lost wax casting.

Process costs: tooling costs (low - middle), single piece costs (middle - high), labor charges (high)

Typical products: the use of a very wide range, such as building structure, consumer electronics, aerospace, jewelry, urban sculpture, etc.

Production is suitable for medium and large scale production

Quality: high precision forming surface, especially suitable for forming metal parts with complex shape.

Speed: the cycle is long (24 hours).

Applicable Materials

Not only for all ferrous and non-ferrous metals, but also can be used for the traditional cast materials such as super alloy. The most commonly used materials are: low alloy steel, stainless steel, aluminum, titanium, zinc, copper, nickel alloys and precious metals.

Design considerations

The part thickness is determined by the alloy material used.

1 aluminum alloy and zinc alloy parts wall thickness should be controlled between 1.5mm-3mm (0.079-0.118in)

2 steel and copper alloy parts wall thickness should be greater than 3mm (0.118in)

Problems to be noticed in mechanical polishing

Should pay attention to problems in mechanical polishing with sandpaper polishing, should pay attention to the following points:

(1) need to use sandpaper polishing stick or soft bamboo stick. When polishing round or spherical surface, the use of cork rod can better fit the circular surface and the surface of the sphere. Hard wood like cherry, polishing is more suitable for smooth surface. Trimming of the wood at the end of the surface shape of steel parts and kept consistent. Only in this way can avoid the wood or bamboo strips) acute angle of contact on the surface of steel caused by deep scratches.

(2) when used for different types of sand paper, the polishing direction should transform 45 ~ 90 degrees, so the former models of sandpaper polishing after leave the shadow stripe can be resolution. Before the change of different types of sand must be 100% pure cotton picks up like alcohol cleaning fluid to the polished surface was carefully wipe, because that will destroy the next a small gravel left on the surface polishing work as a whole. From the sandpaper polished into diamond grinding paste polishing, the cleaning process is equally important. All particles and kerosene must be thoroughly cleaned before the polishing is carried out.

(3) in order to avoid scratches and burn the surface of the workpiece, must be careful in using #1200 and #1500 sandpaper polishing. So it is necessary to load a light load and use the two step polishing method to polish the surface. For each type of sandpaper polishing should be in two different directions of two polishing, two direction between each rotation of 45 degrees ~ 90 degrees.

What are the properties used for the determination of powder metallurgy?

What are the general characteristics of the powder used for powder metallurgy?

There are three general: chemical composition, physical properties and process performance. The physical properties of the powder used for powder metallurgy mainly include those?

(1) particle shape of powder;

(2) the size and composition of the powder;

(3) the specific surface of the powder.

What are the main properties of powder metallurgy process for powder metallurgy? Mainly include the following five:

(1) loose packing density;

(2) the density of vibration:

(3) liquidity;

(4) compressibility;

(5) formability.

What is the requirement of powder metallurgy injection molding process for organic binder?

Powder metallurgy injection molding process of metal powder particle size is generally in 0.5~20 mu m; theoretically speaking, the smaller the particle size, the larger the surface area, easy forming and sintering. The traditional powder metallurgy process uses more than 40 m of coarse powder. The role of organic adhesive is to bond metal powder particles, so that the mixture in the jet barrel heating with rheological properties and lubrication, that is, to drive the flow of powder carrier. Therefore, the choice of adhesive is the carrier of the whole powder.

Requirement of powder metallurgy injection molding process for organic binder:

1 less dosage, with less adhesive agent can make better rheological properties of the mixture;

2 does not react, in the process of removing the adhesive and metal powder can not afford any chemical reaction;

3 easy to remove, no residual carbon in the inner. Mixing metal powder with organic binder mixed together, so that a variety of raw materials into a mixture of spray forming. The uniformity of the mixture has a direct impact on its mobility, which influences the spray forming process parameters, as well as the density and other properties of the final materials. The process of spray forming is consistent with the principle of plastic injection molding process, and the equipment condition is basically the same.

On the advantages of powder injection molding of cemented carbide

cemented carbide powder injection molding technology advantage

Injection molding technology for the production of powder metallurgy parts of the raw materials required to be harsh, in the range of 0.1-10 m particle size of the powder produced products are easy to achieve high dimensional accuracy. The current hard alloy used raw material production basically belong to the size range, meet the requirements of raw material powder MIM technology, so hard alloy powder can be directly applied to injection molding process, raw material cost is not increased, it is hard alloy injection forming technology is a big advantage.

Hard alloy with high hardness, high strength, wear resistance, corrosion resistance, high temperature resistance and expansion coefficient is small wait for a series of advantages, is indispensable for metal processing, mining, oil drilling, national defense and military tools and materials. In addition, in recent years hard alloy in a watch case, the decoration wear-resistant parts has also been widely used.

The traditional hard alloy production method (pressing and sintering method) can only produce relatively simple products, thus limiting the scope of application of cemented carbide. Cold, hot and other static pressure can produce complex shape products, but the cost is very high, not suitable for mass production. Hard alloy injection forming technology and widen the application fields of the hard alloy, the technology can to lower the cost of producing a near net shape, complex geometry and ordinary molding and other methods are difficult to manufacture the product.

What is the most prominent advantages of powder metallurgy products are

PM parts in the proportion of the number can be seen in the position of the rapid development of powder metallurgy gear in the powder metallurgy industry.

The most prominent advantages of powder metallurgy are two:

(1) can be manufactured using other processes currently unable to manufacture or difficult to manufacture materials and products, such as porous, sweating, shock absorption, insulation and other materials and products, tungsten, molybdenum, titanium and other refractory

Metal materials and products, metal - plastic, double metal and other composite materials and products.

(2) can directly produce desirable or close to finished size requirements of products, thereby reducing or eliminating machining, the material utilization can be up to 95%, it can in some articles of iron and copper, so that the "provincial timber saving. "

Is to use MIM mobile phone card metal manufacturing process

You may not know that MIM (metal injection molding) technology, but you must know that mobile phone metal Cato, the mobile phone metal Cato is mainly fabricated by MIM technology.

The MIM process combines the flexibility of the injection molding design and the high strength and integrity of the precision metal to achieve a low cost solution for the extremely complex geometric components. MIM manufacturing processes generally include: mixing granulation, injection molding, skim, sintering and surface treatment to achieve the production of parts, the product characteristics determine whether the surface treatment.

MIM metal forming technology can not only applied to mobile phone metal Cato, has also been widely used in various automotive, medical, electronics, industrial, consumer and other sectors, products related to include auto parts, aerospace equipment, mobile phones, dental instruments, electronic radiator and sealed packaging, electronic connector hardware, industrial tools, optical fiber connector, spray system, disk drives, medical equipment, handheld electric tools, surgical instruments and sports equipment etc., the future of MIM technology will involve more industries.