- 미세 딤플의 밀도에 따른 SCM415강의 마찰 거동 연구
- ㆍ 저자명
- 조민행,이성혁,박상일,여인웅,Cho. Min-Haeng,Lee. Seung-Hyuk,Park. Sang-Il,Lyo. In-Woong
- ㆍ 간행물명
- 윤활학회지
- ㆍ 권/호정보
- 2010년|26권 6호|pp.311-316 (6 pages)
- ㆍ 발행정보
- 한국윤활학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Surface texturing of micro dimple or pore-shaped pattern was prepared using a fiber laser system. Surface texturing was designed to have a square pattern with a particular pitch distance for each corresponding density of 5, 10, 20, and 30%. Thermal damages such as bulges and burrs formed during laser irradiation were observed around the dimples. Thermal damages were later removed by lapping using alumina particles of $0.3{mu}m$ in diameter. Oscillating friction tests were performed against heat-treated high speed steels under lubricated condition. The lubricant used was SAE 5W-30 automotive engine oil. Normal contact pressure and oscillating frequency was 0.28 MPa and 20 Hz, respectively. The tests were continued for 20 minutes, and friction plots were recorded for examination. Results revealed that the coefficient of friction was lowered regardless of texturing density. Moreover, the lowest coefficient of friction was obtained for 10% density texturing. It is attributed to increased lubricity due to the introduction of surface texturing. In addition, it is concluded that the optimum texturing density and pattern must be found for the best lubricity and low friction.