Effect of Laser Power on Microstructure and Wear Resistance of WC_P/Ni Cermet Coating

查看全文 作　　者：SI Song-[1]hua;YUAN Xiao-[1]min;LIU Yue-[1]long;HE Yi-[1]zhu;Keesam [2]Shin

机构地区：[1]School of Materials Science and Technology, Anhui University of Technology, Ma'anshan 243002, Anhui, China;[2]School of Nano and Advanced Materials, Changwon National University, Changwon 641-773, Gyeungnam do, Korea

出　　处：《Journal of Iron and Steel Research(International)》索引2006年第13卷第3期,共5页

基　　金：Item Sponsored by Research Programof Anhui Science and Technology Office (2005KJ030) and Korea Research FoundationGrant (KRF-2004-005-D00096) 摘　　要：Laser cladding nickel-based alloy coating (Ni60) and nickel-based composite coating doped with WC par-ticles by 35 %( WCP/Ni) were produced onthelow-carbon steel substrate by CO2continuous wavelaser with pow-er of 5 kWusing theinjected powder technique . The effect of laser power on microstructure and wear resistance oflaser cladding WCP/Ni cermet coating was investigated . The WC_P/Ni alloy coating with evenly distributed WCce-ramic phases and the better bond with the substrate alloy was obtained at a power of 2·2 kW. Diffusion solutionreaction happened between WC particles and the substrate alloy during laser cladding ,and led to the formation ofblock rich-tungsten carbide on the edges of the WC particles ,especially at higher power . The WC_P/Ni alloy coat-ing consists of the undissolved WC particles ,the block or dendritic rich-tungsten carbide ,the bar-like rich-chromi-umcarbide ,and dendrite solid solution and eutectic structure among the carbides . Microhardness and wear resist-ance of the WC_P/Ni coating at different powers were much higher or better than those of Ni60 alloy coating ,andthe best results were obtained at power of 2·2 kW. 关键词：陶瓷涂层 WCp/Ni 激光功率显微结构磨损抗力

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Effect of Laser Power on Microstructure and Wear Resistance of WC_P/Ni Cermet Coating

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