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Metal powder injection molding technology are generally made by what method?

Categories: ZCMIM NewsStars: 3StarsVisit: -Release time: 2016-03-03 11:45:00
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MIM metal injection molding material system of application include: Fe Ni alloy, stainless steel, tool steel, high proportion alloy, hard alloy, titanium alloy, nickel base super alloy, intermetallic compound, alumina, zirconia and other. The technical requirements of the micron size of the metal powder injection molding, nearly spherical shape. In addition to the apparent density of the powder and the tap density of powder, slenderness ratio, natural slope angle and size distribution also have certain requirements. The main methods for production of metal powder injection molding technology are: water atomization method, gas atomization, carbonyl. Powder grade stainless steel metal injection commonly used are: 304L, 316L, 317L, 410L, 430L, 434L, 440A, 440C, 17-4PH etc..

 

For the production process for water atomization:

- deoxy except for slag, atomization quality detection of screening, packaging and storage mainly used equipment: intermediate frequency induction furnace, high pressure pump, full closed pulverizing device, circulation water pool, screening and packaging equipment, testing instruments, such as selection of stainless steel raw materials, intermediate frequency induction furnace melting, adjustment of composition.

 

The atomization process for its production:

- deoxy except for slag, atomization quality detection of screening, packaging and storage mainly used equipment: if induction furnace, nitrogen source and an atomization device, circulation water pool, screening and packaging equipment, testing instruments, such as selection of stainless steel raw materials, intermediate frequency induction furnace melting, adjustment of composition.

 

Each method has its advantage and disadvantage: water atomization method is main milling process, the high efficiency, large-scale production and economic comparison, the refined powder, but irregular shape, which is conducive to the conformal, but more binder affecting the accuracy. In addition, the formation of water and metal oxide film prevents high temperature reaction sintering.

 

Gas atomization method is the production of metal injection molding technology with powder is the main method and its production of powder is spherical, the low degree of oxidation, the required less binder, forming good, but very fine powder yield is low, prices high, conformal poor and binder in C, N, h, O of the sintered bodies. Method for the production of high purity carbonyl powder, at the beginning of stable, very fine granularity, it is most suitable for MIM, but only Fe, Ni powder, can not meet the requirements of variety.

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