Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Effect of Coating Layer Hardness on the Wear Characteristics of Diesel Engine Cylinder liner-Piston Ring

디젤엔진 실린더 라이너-피스톤 링의 코팅 층 강도에 따른 마모특성 연구

  • 장정환 (부산대학교 정밀기계공학과/ 정밀정형 및 금형가공 연구소) ;
  • 김정훈 (두산엔진(주) 기술연구소) ;
  • 김창희 (두산엔진(주) 기술연구소) ;
  • 문영훈 (부산대학교)
  • Published : 2008.08.01
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Abstract

The wear between piston ring face and cylinder liner is an extremely unpredictable and hard-to-reproduce phenomenon that significantly decreases engine performance. This study will discuss characteristics of wear between hard and soft piston ring coatings with running surface of cylinder liner. Detailed tribological analysis by using Pin-on-Disk(POD) testing machine describes the lubricity mechanism between piston ring coatings and cylinder liner at different temperature with and without oil. The effect of surface roughness of the cylinder liner on the friction coefficient and wear amount of piston ring coatings will also be analyzed. To simulate scuffing mechanism between piston ring and cylinder liner, accelerated lab testing was performed. This study will provide the data from tribological testing of hard and soft piston ring coatings against cylinder liner. Furthermore, the microstructures and morphological features of the surface and the near-surface materials during wear will be investigated. From the scuffing test by using POD testing machine, scuffing mechanisms for the soft and hard coating will be analyzed and experimentally confirmed.

Keywords

References

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