Tribology and Lubricants

  • 제25권4호
  • /
  • Pages.217-224
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  • 2009
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  • 2713-8011(pISSN)
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  • 2713-802X(eISSN)
한국트라이볼로지학회 (Korean Tribology Society)
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무윤활 상태에서 미세공이 가공된 표면의 마찰거동에 관한 연구

A Study on Friction Behavior of Textured Surface in Unlubricated State

  • 오석주 (한국과학기술원 기계항공시스템학부) ;
  • 김성기 (한국과학기술원 기계항공시스템학부) ;
  • 김경웅 (두산인프라코어(주))
  • Oh, Seok-Ju (School of Mechanical, Aerospace & Systems Engineering, KAIST) ;
  • Kim, Sung-Gi (School of Mechanical, Aerospace & Systems Engineering, KAIST) ;
  • Kim, Kyung-Woong (Doosan Infracore Co., Ltd)
  • 발행 : 2009.08.31
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초록

In this study, friction tests were carried out in order to investigate the friction behavior of textured surface in unlubricated state using ball-on-disk type apparatus. Test specimens were SUJ2 bearing steel ball and SM45C steel disk. Square arrays of circular micro-dimples were created on the surface of disk specimen by Nd:YAG Laser. Friction tests were performed for the disk specimen with various micro-dimple parameters and was also conducted for the variation of normal loads and relative velocities. The results showed that fiction coefficient of textured surface was lower than that of non-textured surface and the deeper depth of micro-dimple was, the lower friction coefficient obtained at the same diameter of micro-dimple in unlubricated state. Area density of micro-dimple had an effect on the friction coefficient. It was also found that friction coefficient generally decreased with the increase of normal load and relative velocity.

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참고문헌

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