How to remedy the defects of carbide parts formed by metal powder injection molding?

How to remedy the defects of carbide parts formed by metal powder injection molding?

The production process of carbide components is composite at first. It is the combination of mixed metal powder and agent. It has the ability to produce high-quality products in a controlled environment. However, there are defects in the production of carbide components, and good measures should be taken to solve them.

1. Powder selection link

In addition to meeting the basic requirements of particle size distribution and particle size, cemented carbide powder has high purity and cannot use powder and impurities. When sulfur, phosphorus, silicon and other elements are mixed in the powder, these substances will produce pores and defects in the product.

2. Feed production

When mixing cemented carbide powder, appropriate adhesive is required. The cemented carbide powder and adhesive shall be fully mixed. During the mixing process, the temperature shall be strictly controlled to avoid the volatility and uneven distribution of the adhesive, so that the mixed supply has good rheological properties and viscosity values and avoid the defects of the future links.

3. Form green links

This is also an important part in the production of cemented carbide parts, to avoid product defects, and to reasonably control the mold temperature, supply volume, injection pressure, pressure, pressure time, injection speed, etc. during injection to effectively avoid green defects in injection.

4. Skip the conversation

Carbide degreasing. During the degreasing process, too fast heating speed of the degreasing furnace will lead to carbide defects in the parts. The method of gradually increasing temperature and degreasing can be adopted.