Investigation and application of high strength low alloy wear resistant cast steel

摘要

A kind of low alloy wear resistant cast steel that does not contain costly alloy elements such as molybdenum, nickel, copper and vanadium has been successfully developed. By the refinement with rare earth and titanium, the purification with blowing argon and improving the hardenability with boron, the cast steel containing 0-25-0-45%C, 0-5-1-5%Si, 0-5-1-5%Mn, 0-5-1 -5%Cr and a small quantity of titanium, boron, rare earth, calcium and aluminium has high tensile strength, impact and fracture toughness and excellent wear resistance. In the excavator bucket teeth, crusher hammer and ball mill liner, low alloy wear resistant cast steel has 2-4 times longer servicing life than that of Hadfield austenitic steel, and its production cost is equal to that of Hadfield austenitic steel. The use of low alloy wear resistant cast steel is safe and reliable, and there is no fracture and scaling in the use. The application of low alloy wear resistant cast steel has good economic and social benefits.