METAL POWDER FOR IRON-NICKEL TYPE SINTERED COMPACT, IRON-NICKEL TYPE SINTERED COMPACT, AND PRODUCTION THEREOF

摘要

PURPOSE: To minimize energy loss at the time of vibration in a low-freauency region by subjecting a molded body of a kneaded material consisting of an Ni alloy powder of prescribed conditions, containing prescribed percentages of Ni and Fe, and an organic binder to sintering at a temp. slightly lower than the melting point of this alloy powder. ;CONSTITUTION: An alloy having a composition consisting of, by weight, 10-60% Ni and the balance Fe is melted. This Fe-Ni alloy is formed into powder, in which average grain size, carbon content, and oxygen content are regulated to ≤15μm, ≤0.1%, and ≤0.5%, respectively. Then, this alloy powder is kneaded with an organic binder, which is molded and degreased. Subsequently, sintering is done at a temp. lower by 20-100°c than the melting point of this alloy powder, By this method, the Fe-Ni type sintered compact minimal in energy loss at the time of vibration in a low frequency region of ≤100KHz can be obtained.;COPYRIGHT: (C)1994,JPO