ALLOYED STEEL POWDER FOR POWDER METALLURGY

摘要

A Mo source powder is added to and mixed with an iron-based powder containing 1.0 % by mass or less of prealloyed Mn to yield a powder mixture containing 0.2 to 10.0 % by mass of Mo, the resulting powder mixture is subjected to heat treatment in a reducing atmosphere to thereby yield an alloyed steel powder containing Mo as a powder partially diffused and bonded to a surface of the iron-based powder particles. The prepared alloyed steel powder for powder metallurgy has satisfactory compactability. The use of this alloyed steel powder can produce a sintered powder meta l body (an intermediate material after compaction and preliminary sintering in re-compaction of sintered powder materials process) for highly strong sintered member.