- TiC 분산된 니켈기 합금의 미세조직 및 기계적 특성에 미치는 열처리 영향
- ㆍ 저자명
- 홍성현,황금철,이원혁,진억용,Hong. Seong-Hyeon,Hwang. Keum-Chul,Rhee. Won-Hyuk,Chin. Eog-Yong
- ㆍ 간행물명
- 한국분말야금학회지
- ㆍ 권/호정보
- 2002년|9권 6호|pp.455-462 (8 pages)
- ㆍ 발행정보
- 한국분말야금학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The microstructures and properties of TiC dispersed nickel-base alloy were studied in this work. The alloy prepared by powder metallurgical processing was solution treated, 1st-aged at $880^{circ}C$ for 16 hours, and then 2nd-aged at $760^{circ}C$ for 4 hours. Microstucture of sintered specimen showed that TiC particles are uniformly dispersed in Ni base alloy. In the specimen aged at $880^{circ}C$ for 8 hours, the fine $gammaNi_3$(Al,Ti) precipitates with round shape are observed and the very fine $gammaNi_3$(Al,Ti) particles with round shape are precipitated in the specimen aged at $760^{circ}C$ for 4 hours. The presence of ${gamma}$precipitates in TiC/Ni base alloy increased the hardness and wear resistance of the specimen. The hardness and wear resistance of the Ni-base with TiC are higher than those of conventional Ni-base superalloy X-750 because of dispersion strengthening of TiC particles. The hardness, transverse rupture strength and resistance of the specimen 2nd-aged at $760^{circ}C$ for 4 hours are higher than those of 1st-aged specimen due to ultrafine $gammaNi_3$(Al,Ti) precipitates.