when molding plastics of particularly large abrasion force, the abrasion may still be rather serious even if high carbon or high chrome is used. Under such instance, hard alloy made through powder metallurgy method can be adopted as mold material, wherein this alloy steel contains approximately 33% titanic carbide whose hardness is pretty high, and therefore, the abrasion resistance is excellent.
Similar with other tool steel, hard alloy presents low hardness under anneal state and is suitable for machining.
The hardness of hard alloy after heat treatment can reach approximately 70HRC, Heat treatment thereof can be done in vacuum furnace if condition permits, due to the carbon content, the dimension change after heat treatment is only 50% of that for smelting steel.