METHOD FOR PRODUCING MIXED POWDER FOR POWDER METALLURGY METHOD FOR PRODUCING SINTERED COMPACT AND SINTERED COMPACT

摘要

A mixed powder for powder metallurgy which can obtain a sintered body having an excellent tensile strength and toughness equal to or higher than that of Ni, even when Ni is not contained. A first mixing step of mixing the iron powder with the Mo-containing powder and the Cu-containing powder to form a raw material mixture powder; and heat-treating the raw material mixture powder to diffuse Mo and Cu on the surface of the iron powder, And a second mixing step of mixing the graphite powder with the partially-diffused alloy steel powder to prepare a mixed powder for powder metallurgy, wherein the iron powder powder has an average particle diameter of 30 - Wherein the powdery metallurgical mixture powder comprises 0.2 to 1.5 mass% of Mo, 0.5 to 4.0 mass% of Cu, 0.1 to 1.0 mass% of C, And the balance of Fe and inevitable impurities. The present invention also provides a method for producing a mixed powder for powder metallurgy.