1, milling
Milling is the process of making raw materials into powder, and the commonly used milling methods are oxide reduction method and mechanical method.
Step 2 mix
Mixing is the process of mixing all kinds of required powders in a certain proportion and homogenizing them into green powders. There are dry, semi-dry and wet types for different requirements.
Step 3 form
Molding is the process of putting the evenly mixed mixture into a mold and pressing it into a parison with a certain shape, size and density. Forming methods are basically divided into pressure forming and pressureless forming. Compression molding is the most widely used in pressure molding.
4. Sintering
Sintering is a key process in powder metallurgy. The formed compact is sintered to obtain the required final physical and mechanical properties. Sintering is divided into unit sintering and multi-system sintering. In addition to ordinary sintering, there are special sintering processes such as loose sintering, impregnation and hot pressing.
5. Post-processing
The treatment after sintering can be carried out in various ways according to different product requirements. Such as finishing, oil immersion, machining, heat treatment and electroplating. In addition, in recent years, some new technologies, such as rolling and forging, have also been applied to the processing of powder metallurgy materials after sintering, and satisfactory results have been achieved.