Cemented carbide tensile abrasives are ten times or even dozens of times the life of steel molds. Cemented carbide molds only have high hardness, high strength, corrosion resistance, high temperature resistance and small expansion coefficient. Generally, tungsten and cobalt are used. alloy.

     Many problems will be encountered in the process of casting castings, such as:

1. Poor filling conditions, gate location, diversion method, improper selection of the number of inner gates, or the cross-sectional area of the inner gate is too small, resulting in large flow resistance.

2. The temperature of molten metal and mold is too low.

3. Insufficient amount of pouring material.

4. Poor exhaust.

5. There is residue in the mold cavity

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