| 摘要 |
An alloy steel powder for metal injection molding, characterized in that it has a chemical composition, in mass %: C: 0.1 to 1.8 %, Si: 0.3 to 1.2 %, Mn : 0.1 to 0.5 %, Cr: 11 to 18 %, Nb: 2 to 5 %, and the balance: Fe and inevitab le impurities; the alloy steel powder, characterized in that it further compris es at least one of Mo, V and W in an amount of 5.0 mass % or less; and a sinter ed article derived from the alloy steel powder (provided that the content of C is 0.1 to 1.7). The alloy steel powder can provide sintered articles having a constant sintered density over a range of sintering temperatures having a width of 50~C, as shown in FIG~s 6 to 9, resulting in the easiness of the control of sintering temperature, which leads to the improvement of productivity and the prevention of the occurrence of a product having a reduced strength. |
