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논문 기본 정보

자료유형
학술저널
저자정보
조민행 (중앙대학교) 이성혁 (중앙대학교) 박상일 (중앙대학교) 여인웅 (현대자동차)
저널정보
한국트라이볼로지학회 Tribology and Lubricants 윤활학회지 제26권 제6호
발행연도
2010.12
수록면
311 - 316 (6page)

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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 ㎛ 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 ㎫ and 20 ㎐, 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.

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UCI(KEPA) : I410-ECN-0101-2012-551-004137101