한국분말재료학회지 (Journal of Powder Materials)

  • 제17권6호
  • /
  • Pages.456-463
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  • 2010
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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하이브리드 선형이온원에 의한 유압 기어펌프용 Cr-DLC코팅막의 특성과 효율성능

Coatings Properties and Efficiency Performance of Cr-DLC Films Deposited by Hybrid Linear Ion Source for Hydraulic Gear Pump

  • 차순용 (부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)) ;
  • 김왕렬 (한국생산기술연구원 동남권기술지원본부) ;
  • 박민석 (한국생산기술연구원 동남권기술지원본부) ;
  • 권세훈 (부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)) ;
  • 정원섭 (부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)) ;
  • 강명창 (부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC))
  • Cha, Sun-Yong (National Core Research Center for Hybrid Materials Solution, Pusan National University) ;
  • Kim, Wang-Ryeol (Dongnam Technology Application Division, Korea Institute of Technology) ;
  • Park, Min-Suk (Dongnam Technology Application Division, Korea Institute of Technology) ;
  • Kwon, Se-Hun (National Core Research Center for Hybrid Materials Solution, Pusan National University) ;
  • Chung, Won-Sub (National Core Research Center for Hybrid Materials Solution, Pusan National University) ;
  • Kang, Myung-Chang (National Core Research Center for Hybrid Materials Solution, Pusan National University)
  • 투고 : 2010.10.20
  • 심사 : 2010.11.22
  • 발행 : 2010.12.28
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초록

This paper describes the results of the application of Cr-Diamond-like carbon (DLC) films for efficiency improvement through surface modification of spur gear parts in the hydraulic gear pump. Cr-DLC films were successfully deposited on SCM 415 substrates by a hybrid coating process using linear ion source (LIS) and magnetron sputtering method. The characteristics of the films were systematically investigated using FE-SEM, nano-indentation, sliding tester and AFM instrument. The microstructure of Cr-DLC films turned into the dense and fine grains with relatively preferred orientation. The thickness formed in our Cr buffer layer and DLC coating layer were obtained the 487 nm and $1.14\;{\mu}m$. The average friction coefficient of Cr-DLC films considerably decreased to 0.15 for 0.50 of uncoated SCM415 material. The hardness and surface roughness of Cr-DLC films were measured 20 GPa and 10.76 nm, respectively. And then, efficiency tests were performed on the hydraulic gear pump to investigate the efficiency performance of the Cr-DLC coated spur gear. The experimental results show that the volumetric and mechanical efficiency of hydraulic gear pump using the Cr-DLC spur gear were improved up to 2~5% and better efficiency improvement could be attributed to its excellent microstructure, higher hardness, and lower friction coefficient. This conclusion proves the feasibility in the efficiency improvement of hydraulic gear pump for industrial applications.

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