METAL POWDER FOR POWDER METALLURGY MAINLY CONTAINING IRON AND IRON-BASE SINTERED MATERIAL

摘要

Disclosed is a mixed powder for powder metallurgy which is capable of improving antirust effects easily without altering the conventional production process very much. Specifically disclosed is a metal powder for powder metallurgy mainly containing iron which is characterized by including a metallic soap containing at least one metal having a standard oxidation potential higher than that of iron and selected from the group consisting of Ag, Au, Bi, Co, Cu, Mo, Ni, Pd, Pt, Sn and Te, and an additional metal which forms a liquid phase at 1200°C or less in combination with the metal contained in the metallic soap. The metal powder for powder metallurgy is further characterized in that the soap contains such a metal that forms an alloy phase together with the additional metal.