ABRASIVE WEAR BEHAVIOR OF WC REINFORCEDNi-BASED COMPOSITE COATING SPRAYED AND FUSED BY OXY-ACETYLENE FLAME

Qun Wang, Zhenhua Chen, Zhang Xiong Ding and Ding Chen
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Qun Wang: College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
Zhenhua Chen: College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
Zhang Xiong Ding: College of Energy and Engineering, Wuhan University of Technology, Wuhan, Hubei 430063, China
Ding Chen: College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China

Surface Review and Letters (SRL), 2009, vol. 16, issue 03, 475-485

Abstract: Microstructure of WC reinforcedNi-based self-fluxing alloy composite coating sprayed and fused by oxy-acetylene flame was investigated by scanning electron microscopy and energy dispersive X-ray Spectrometry, X-ray diffraction, and transmission electron microscopy. The wear performance of the coating was studied by a MLS-225 wet sand rubber wheel abrasive wear tester at various loads and sizes of abrasive particles. Also, the wear resistance of the coating was compared with uncoated ASTM1020 steel. The results indicated that the coating is bonded metallurgically to the substrate and has a homogeneous microstructure composed of both coarse WC and fine carbide and boride grains such asCr7C3,Cr23C6, andNi2Bwhich disperse uniformly in the matrix of γ-Nisolid solution andNi3B. The worn mass loss of the coating and ASTM1020 steel both increased with the load and size of abrasive particles, also, the coating has exhibited excellent abrasive wear resistance compared with ASTM1020 steel.

Keywords: Abrasive wear; spraying and fusing coating; Ni-based self-fluxing alloy (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012883

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