| 摘要 |
A method of manufacturing a Ni alloy part includes a solution treatment step (S10) of solution treating a sintered compact, which is obtained by sintering and molding a precipitation hardening Ni alloy powder by metal injection molding, by allowing the sintered compact to hold at a temperature of not lower than 1050°C but not higher than 1250°C for one hour to five hours, followed by rapidly cooling to room temperature, where the precipitation hardening Ni alloy powder includes Ti of 0.65% by mass to 1.15% by mass, inclusive, Al of 0.20% by mass to 0.80% by mass, inclusive, Cr of 17.00% by mass to 21.00% by mass, inclusive, Nb of 4.75% by mass to 5.50% by mass, inclusive, Mo of 2.80% by mass to 3.30% by mass, inclusive, Ni of 50.00% by mass to 55.00% by mass, inclusive, and the balance including Fe and unavoidable impurities, and an aging treatment step (S12) of aging-treating the solution-treated sintered compact by allowing the solution-treated sintered compact to hold at the temperature of not lower than 600°C but not higher than 800°C, followed by cooling to room temperature. |
