한국분말재료학회지 (Journal of Powder Materials)

  • 제24권5호
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  • Pages.370-376
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  • 2017
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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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레이저 클래딩 공정을 이용한 Ni-Cr-B-Si + WC/12Co 복합 코팅층의 제조 및 기계적 특성

Manufacturing of Ni-Cr-B-Si + WC/12Co Composite Coating Layer Using Laser Cladding Process and its Mechanical Properties

  • Ham, Gi-Su (Department of Materials Science and Engineering, Inha University) ;
  • Kim, Chul-O (Vitzrotech Co.) ;
  • Park, Soon-Hong (Research Institute of Industrial Science and Technology) ;
  • Lee, Kee-Ahn (Department of Materials Science and Engineering, Inha University)
  • 투고 : 2017.08.10
  • 심사 : 2017.08.26
  • 발행 : 2017.10.28
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초록

In this study we manufacture a Ni-Cr-B-Si +WC/12Co composite coating layer on a Cu base material using a laser cladding (LC) process, and investigate the microstructural and mechanical properties of the LC coating and Ni electroplating layers (reference material). The initial powder used for the LC coating layer is a powder feedstock with an average particle size of $125{\mu}m$. To identify the microstructural and mechanical properties, OM, SEM, XRD, room and high temperature hardness, and wear tests are implemented. Microstructural observation of the initial powder and LC coating layer confirm the layer is composed mainly of ${\gamma}-Ni$ phases and WC and $Cr_{23}C_6$ carbides. The measured hardness of the LC coating and Ni electroplating layers are 653 and 154 Hv, respectively. The hardness measurement from room up to high temperatures of $700^{\circ}C$ result in a hardness decrease as the temperature increases, but the hardness of the LC coating layer is higher for all temperature conditions. Room temperature wear results show that the wear loss of the LC coating layer is 1/12 of the wear level of the Ni electroplating layer. The measured bond strength is also greater in the LC coating than the Ni electroplating.

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피인용 문헌

  1. Microstructure and Room Temperature Wear Properties of a Ni-Cr-B-Si-C Coating Layer Manufactured by the Laser Cladding Process vol.56, pp.6, 2018, https://doi.org/10.3365/KJMM.2018.56.6.423