How to make up for the carbide part defect of metal powder injection molding

Processes for the production of carbide parts first is complex, is the combination of mixed metal powder and binder, and has the ability, in a controlled environment, can produce high quality products, but the big macro new material of MIM experts found there are some defects in production of carbide parts, therefore the MIM technology team think it need to do some good measures to solve is better.

1. Powder selection link. Hard alloy powder not only meets the basic requirements of particle size distribution and particle size, but also requires high purity of powder. Powder and impurities cannot be used. If the powder is mixed with sulfur, phosphorus, silicon and other elements, these substances will form pores in the injection molding process of metal powder, resulting in product defects.

2. Feed production. When the cemented carbide powder is mixed, an appropriate binder is needed to fully mix the cemented carbide powder and the binder. In the mixing process, the temperature should be strictly controlled to avoid the volatility and uneven distribution of the binder, so that the mixed material has good rheological properties and viscosity value, in order to avoid future defects.

3. Form a green link. In order to avoid product defects, it is necessary to pay attention to reasonable control of mold temperature, feed volume, injection pressure, pressure, pressure time and injection speed in the process of injection molding to effectively avoid green defects.

4. Skim the conversation. Carbide degreasing, in the degreasing process, if the degreasing furnace heating speed is too fast, will cause the carbide defects in the parts, daihong new material proposed to use the method of gradual heating degreasing.

Metal powder injection molding technology enables metal powder injection molding manufacturers to combine several stages and operations into a single process, thus greatly reducing production costs and delivery time. At the same time, due to the manufacturing of metal powder injection molding parts, such as MIM mobile phone parts, MIM car parts, etc., its net weight, so as to reduce the waste of MIM materials and related costs.