Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Wear Property of Diamalloy-4006 Coating Prepared by OCP HVOF Thermal Spraying

최적 고속화염용사법으로 제조된 Diamalloy4006 코팅의 내마모 특성

  • Joo, Yunkon (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Yoon, Jaehong (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Jung, Yeongil (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Lee, Jehyun (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University)
  • 주윤곤 (창원대학교 신소재공학부, 메카트로닉스 융합부품소재 연구센터) ;
  • 윤재홍 (창원대학교 신소재공학부, 메카트로닉스 융합부품소재 연구센터) ;
  • 정연길 (창원대학교 신소재공학부, 메카트로닉스 융합부품소재 연구센터) ;
  • 이재현 (창원대학교 신소재공학부, 메카트로닉스 융합부품소재 연구센터)
  • Received : 2015.07.26
  • Accepted : 2015.08.02
  • Published : 2015.09.27

Abstract

The effects of coating parameters were investigated in wear resistance coatings of Diamalloy-406 on Inconel 718 to obtain an optimum coating condition by high velocity oxy-fuel spraying. The coating parameters, the flow rates of source gases (hydrogen and oxygen), the powder feed rate, and the spray distance, were designed by the Taguchi method. The optimal conditions were determined: oxygen flow rate 34 FRM, hydrogen flow rate 57 FRM, powder feed rate 35 g/min, and spray distance 7 inch. Friction coefficients of the coating and the substrate decreased with an increasing sliding surface temperature from $25^{\circ}C$ to $450^{\circ}C$. The friction coefficient of Diamalloy-4006 coating decreased as the sliding surface temperature increased from $0.43{\pm}0.01$ at $25^{\circ}C$ to $0.29{\pm}0.01$ at $450^{\circ}C$. The wear trace and wear depth of the coating were smaller than the substrate at all temperatures tested. The relationship between spray parameters and wear resistance was discussed extensively, based on the measured roughness, hardness, and porosity in each coating.

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Acknowledgement

Supported by : National Research Foundation of Korea(NRF)

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