Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Wear Property of SACM645 Material with DLC Coating

DLC 코팅된 SACM645 소재의 마모 특성

  • Kim, Nam-Soek (Graduate School, Pukyong National University) ;
  • Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University) ;
  • Park, Jong-Nam (Defense Agency for Technology and Quality) ;
  • Ahn, Seok-Hwan (Bukyong Education Center for Vehicle Safety Component Technology, Pukyong National University) ;
  • Kim, Hyun-Soo (Research Center, Sam-Ho Precision)
  • 김남석 (부경대학교 대학원) ;
  • 남기우 (부경대학교 신소재공학부) ;
  • 박종남 (국방기술품질원) ;
  • 안석환 (부경대학교 수송기계안전편의융합부품소재인재양성센터) ;
  • 김현수 (삼호정밀 기술연구소)
  • Received : 2010.06.21
  • Accepted : 2010.12.17
  • Published : 2010.12.31
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Abstract

Oil hydraulic piston pumps are being extensively used around the world, because of their simple design, light weight, effective cost, etc. An oil hydraulic pump is likely to have the serious problems of high leakage, friction, and low energy efficiency after a long period of use. In an oil hydraulic piston pump, the clearance between the valve block and piston plays an important role for volumetric and overall efficiency. In this study, the wear property of the SACM645 material with DLC coating used for a hydraulic piston pump was determined by experimentation with variable heat treatment. To investigate the effect according to the piston surface condition, five different types of specimens were prepared. The maximum tensile strengths of the QT and QT Nitration specimens had similar values of about 800 MPa, but the strains indicated a big difference. In a wear test, the wear characteristic of the DLC coating specimen was shown to be excellent. The QT, QT + IH, QT + Nitration, and matirx specimen showed similar wear characteristics. In the case of a dry condition without oil, the DLC coating specimen had good wear resistance, with no wear shown.

Keywords

References

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