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The Wear Properties of the Precipitation Hardened Al-Pb-Cu Bearing Alloys

석출경화된 Al-Pb-Cu계 베어링 합금의 마모거동

  • 홍택기 (고려대학교 금속공학과) ;
  • 허무영 (고려대학교 금속공학과) ;
  • 임대순 (고려대학교 재료공학과) ;
  • 안성욱 (한국과학기술연구원 특성분석센터)
  • Published : 1993.10.01

Abstract

Al-Pb-Cu and Al-Si-Pb-Cu bearing alloys were produced by forced-stirring method and water-cooled copper mold casting to investigate the effect of the precipitation hardening on the wear properties. Sliding of produced alloy pin against a steel disc were performed under various applied loads. Lowering the wear rate and material transfer phenomena were explained by the strengthening of $\theta'$ precipitates on AI matrix. The transmission electron microscope observation reveals the role of the precipitates in the alloys with Cu. The movement of dislocations was hindered by precipitates which resulted in the reduction of plastic deformation at the worn surfaces.

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