윤활유 개발을 위한 고온에서의 강철의 윤활특성 해석 = An Analysis on the Lubrication of Steels at High Temperature for Oils

다국어 초록 (Multilingual Abstract)

Effective "break-in" and "scuff" damage of boundary lubricated steel surfaces was found to be due primarily to the rate of growth of "protective" films of oxides and compounds derived from the lubricant. The protection afforded by the films is strongly dependent on lubricant chemistry, steel composition, initial surface roughness and the load/speed sequence or history in the early stages of sliding. The protective films, formed by chemical and mechanical action between lubricant and mating surfaces, delayed the surface roughening and offered higher load capacity.
Especially, the temperature rises due to sliding speed and load change lubrication characteristics. With consideration of temperature rises the characteristics of the protective films should be analysed to verify the lubricating and wear phenomena.
Even the great number of variables involved it is not possible to follow more than a few of the chemical changes on surfaces using the electron/ion/x-ray column analytical instruments at the end of experiments. Ellipsometry was therefore used to monitor the formation and loss of dual protective films in real time, and also to find the effect of protective films on scuffing and break-in depending on lubricant conditions.

목차 (Table of Contents)

• Ⅰ. 서 론
• Ⅱ. 실험방법 및 재료
• 1. 실험방법 및 재료
• 2. Ellipsometry
• 3. 이중보호막 모델
• (Dual film model)
• Ⅲ. 실험결과
• 1. 미끄럼 속도와 부하정도에 따른 온도 증가
• 2. 보호막의 내구성과 굴절율
• (Refractive Index)
• 3. 보호막의 화학적 성질
• 4. 마멸
• Ⅳ. 토 의
• Ⅴ. 결 론