Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
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The Changes of Transfer film and friction Characteristics with the Relative Amounts of Raw Materials

자동차용 마찰재에서 각 원료의 상대량에 따른 전이막 형성 및 마찰특성의 변화

  • Cho, Min-Hyung (Division of Materials Science and Engineering, Korea University) ;
  • Lee, Jae-Young (Division of Materials Science and Engineering, Korea University) ;
  • Kim, Dae-Hwan (Advanced Materials Research Team, Ltd. R&D Center, Hankook Tire Co.) ;
  • Cheong, Geun-Joong (Advanced Materials Research Team, Ltd. R&D Center, Hankook Tire Co.) ;
  • Choi, Chun-Rak (Advanced Materials Research Team, Ltd. R&D Center, Hankook Tire Co.) ;
  • Jang, Ho (Division of Materials Science and Engineering, Korea University)
  • 조민형 (고려대학교 재료금속공학부) ;
  • 이재영 (고려대학교 재료금속공학부) ;
  • 김대환 (한국타이어(주) 중앙연구소 신소재연구팀) ;
  • 정근중 (한국타이어(주) 중앙연구소 신소재연구팀) ;
  • 최천락 (한국타이어(주) 중앙연구소 신소재연구팀) ;
  • 장호 (고려대학교 재료금속공학부)
  • Published : 2001.06.01
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Abstract

An NAO friction material (low-steel type) containing 15 ingredients was investigated to study the role of transfer film on the friction characteristics. The friction material specimens with extra 100% of each ingredient were tested using a pad-on-disk type tribotester. A non-destructive method of measuring the transfer film was developed by considering the electric resistance of the transfer film. Results showed that solid lubricants and iron powder assisted transfer film formation on the rotor surface. Average friction coefficient was independent of transfer film thickness in this experiment. On the other hand, the thick transfer film on the rotor surface reduced the amplitude of friction oscillation under temperature conditions ( 250$^{\circ}C$) that transfer film forms.

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