| 摘要 |
Provided is a powder comprising precipitation hardening stainless steel comprising, in terms of percentage by mass, ≦1.0% of Si, ≦1.8% of Mn, 3.0-8.5% of Ni, 12.0-20.0% of Cr, 0.1-2.5% of Mo, 1.0-5.0% of Cu, and/or 1.0-5.0% of Ti+Al, where Nb+Ta≧5C or Nb≧5C, N≦350 ppm, and the balance is Fe and unavoidable impurities, wherein a martensite structure contained in a sintered compact produced from the steel powder constitutes 90% or more of the precipitation hardening stainless steel powder. This precipitation hardening stainless steel powder yields high strength even when the sintered compact produced from the powder is aged without modification. |
