Patent ID: 6464751
Filing Date: 2002-10-15
Classification: B22F,C22C

Abstract:
An iron-based mixed powder for use in powder metallurgy having an apparent density of at least about 3.1 Mg/m3,comprising:an iron-based powder; at least one alloying powder; binder; and optionally, at least one machinability improving powder; wherein the alloying powder and the machinability improving powder are adhered on the surface of the iron-based powder by the binder; wherein the iron-based powder comprises an atomized iron powder, or a mixed powder of the atomized iron powder and a reduced iron powder; wherein the atomized iron powder has an apparent density of at least about 2.85 Mg/m3wherein the iron-based powder has a maximum particle size of less than about 180 &mgr;m and has a particle size distribution comprising about 18.5 mass % or less of particles with a particle size of less than about 45 &mgr;m, at least about 46 mass % of particles with a particle size of from about 75 &mgr;m to about 150 &mgr;m, and less than about 10 mass % of particles with a particle size of from about 150 &mgr;m to about 180 &mgr;m.