- 쾌삭강의 피로수명 및 절삭성에 미치는 인발-열처리의 영향
- ㆍ 저자명
- 서창희,김동배,오상균,정윤철,박명규,김영석,Suh. C.H.,Kim. D.B.,Oh. S.K.,Jung. Y.C.,Park. M.K.,Kim. Y.S.
- ㆍ 간행물명
- 소성가공
- ㆍ 권/호정보
- 2010년|19권 2호|pp.95-100 (6 pages)
- ㆍ 발행정보
- 한국소성가공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Drawing and normalizing are efficient means for controlling strength, fatigue and machinability of free machining steel. Normally strength and machinability are conflicting properties which need to be optimized. In this study, the effects of normalizing temperature and reduction of area on strength, fatigue and machinability were investigated. Fine grains were generated at lower normalizing temperature and fatigue life was increased with decreasing grain size. Matrix was work hardened and elongated with increasing reduction of area. Inclusions also were elongated and cross-sectional area of inclusions along drawing axis was decreased. The effects of work hardening and grain size on fatigue life were significant, but only work hardening affected machinability. Shape and distribution of inclusions after drawing had little effect on fatigue life and machinability.