| 摘要 |
PURPOSE:To obtain low-alloy iron powder for a high density and high strength sintered material at a low cost by mixing low-alloy iron powder contg. restricted amounts of C and O2 and specified amounts of Mo and Cr with Ni powder, subjecting the powdery mixture to reduction treatment at a specified temp., and powdering the resulting caked mixture again. CONSTITUTION:Low-alloy iron powder consisting of, by weight, 0.2-1.4% Mo, 0.1-0.3% Cr, <=0.3% C, <=0.2% O2, <=2% inevitable impurities and the balance Fe is prepd. The powder is mixed with Ni powder or Ni oxide powder, and the powdery mixture is subjected to reduction treatment at 800-1,050 deg.C for >=20min. The resulting caked mixture is powdered again with a grinder. By this method, low-alloy iron powder for sintering having superior compactibility, heat treatability and toughness is obtd.
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