Ni PRODUCTION METHOD FOR Ni ALLOY COMPONENT

• Main Authors: IKEDA SHUJI, TSUNO NOBUYASU
• Format: Patent
• Language: English; Korean
• Published: 19.12.2016
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; ALLOYS; BLASTING; CASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; FERROUS OR NON-FERROUS ALLOYS; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; NON-POSITIVE DISPLACEMENT PUMPS; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; POWDER METALLURGY; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STEAM ENGINES; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS; WORKING METALLIC POWDER

본 발명은, 석출 경화형 Ni 합금 분말을 사용하여 금속 분말 사출 성형법으로 성형되는 Ni 합금 부품의 기계적 강도 특성을 향상시키는 제조 방법을 제공한다. Ni 합금 부품의 제조 방법은, Ti: 0.65 질량% 이상 1.15 질량% 이하, Al: 0.20 질량% 이상 0.80 질량% 이하, Cr: 17.00 질량% 이상 21.00 질량% 이하, Nb: 4.75 질량% 이상 5.50 질량% 이하, Mo: 2.80 질량% 이상 3.30 질량% 이하, Ni: 50.00 질량% 이상 55.00 질량% 이하, 잔부가 Fe 및 불가피한 불순물로 이루어지는 석출 경화형 Ni 합금 분말을 금속 분말 사출 성형법으로 소결시켜 성형한 소결체를, 1050℃ 이상 1250℃ 이하로 1시간에서 5시간 유지한 후에, 실온까지 급랭하여 용체화 처리하는 용체화 처리 공정과, 용체화 처리한 소결체를 600℃ 이상 800℃ 이하로 유지한 후에, 실온까지 냉각하여 시효 처리하는 시효 처리 공정을 포함한다. 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.