- Ni-Cr-Sn-Bi합금의 anti-galling 특성에 미치는 Te의 영향
- ㆍ 저자명
- 하헌필,김경탁,심재동,김용규,Ha. Heon-Phil,Kim. Kyung-Tak,Shim. Jae Dong,Kim. Yong Kyu
- ㆍ 간행물명
- 한국재료학회지
- ㆍ 권/호정보
- 2005년|15권 1호|pp.14-18 (5 pages)
- ㆍ 발행정보
- 한국재료학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Ni-Cr-Sn-Bi alloys were prepared by air melting and sand casting method and their anti-galling behaviors were examined. Anti-galling properties were dominantly influenced by Bi-rich low temperature precipitates. Alloying effects on the anti-galling properties were investigated for several alloying elements to improve anti-galling properties of the alloy. An alloy with $1-3wt\%$ of Te showed markedly improved anti-galling properties. Metallographic and tribological tests were carried out to find out reasons for excellent properties. It was found that Te containing alloy has finely distributed precipitates of Bi-rich phase. The addition of Te changed the morphology of the Ni-rich primary phase from globular to fine dendritic. As a result, the anti-galling phase precipitated between dendrite arms with fine distribution showed excellent anti-galling properties.