HIGH STRENGTH ALLOY STEEL FOR INJECTION MOLDING AND POWDER METALLURGY

摘要

PURPOSE: To provide alloy steel for injection molding and powder metallurgy having much higher strength and slightly lower elongation than a conventional Fe-Ni-C alloy. ;CONSTITUTION: A blend having a compsn. consisting of 1-10wt.% Cu, 1-10wt.% Ni, 0.3-1wt.% C and the balance Fe is kneaded with an org. binder and injection molded. The resulting compact is freed of the binder and sintered to obtain a sintered compact having 93.2kg/mm² tensile fracture strength and 10.6% elongation. The elongation is slightly lower than that (15.7%) of an Fe-Ni-C alloy but the tensile fracture strength is much higher than that (51.3kg/mm²) of the Fe-Ni-C alloy.;COPYRIGHT: (C)1993,JPO&Japio