Analysis of the manufacturing method of metal powder injection molding technology

Analysis of the manufacturing method of metal powder injection molding technology

In recent years, metal powder injection molding (MIM) technology has been more and more widely used in our production and life. Do you know the manufacturing method of metal powder injection molding technology? Through its own manufacturing experience in metal powder injection molding technology, Zhongwei Precision will briefly introduce the manufacturing method of metal powder injection molding technology.

The main manufacturing methods of metal powder injection molding (MIM) technology include water atomization and gas atomization.

1. Water atomization

Select stainless steel raw materials - melting in medium frequency induction furnace - composition adjustment - deoxidation and slag removal - atomization and pulverization - quality inspection - screening - packaging and warehousing. The equipment mainly used includes medium frequency induction furnace, high pressure water pump, fully enclosed pulverizing device, circulating water pool, screening and packaging equipment, testing instruments, etc.

2. Aerosol method

Select stainless steel raw materials - melting in medium frequency induction furnace - composition adjustment - deoxidation and slag removal - atomization and pulverization - quality inspection - screening - packaging and warehousing. The equipment mainly used includes medium frequency induction furnace, nitrogen gas source and atomization device, circulating water pool, screening and packaging equipment, testing instruments, etc.

The manufacturing methods of the above two metal powder injection molding (MIM) technologies have advantages and disadvantages:

1. Water atomization is the main pulverizing process, which has high efficiency and is economical for large-scale production. It can make the powder fine, but the shape is irregular, which is conducive to shape preservation, but the use of more adhesives affects the accuracy. In addition, through technical experience, zhongwei found that the oxide film formed by high temperature reaction of water and metal hinders sintering.

2. Gas atomization is the main method to produce powder for metal injection molding technology. The powder produced is spherical, with low oxidation degree, less binder required, and good formability, but the yield of ultra-fine powder is low, the price is high, and the shape retention is poor. The C, N, H, O in the binder have an impact on the sinter. Zhongwei's precise MIM experts found that the powder produced by carbonyl method has high purity, stable beginning and extremely fine particle size, which is most suitable for MIM technology, but it is limited to Fe, Ni and other powders, and cannot meet the requirements of variety.

The above contents are mainly about the main manufacturing methods of metal powder injection molding (MIM) technology and the analysis of the advantages and disadvantages of these two methods. If you have any questions, please consult the MIM technical team of ZHONGWEI Precision Metal Powder Injection Molding in Qinhuangdao to answer them!