真空熔覆原位自生W_xC/Ni基复合涂层的组织及耐磨性能  

Microstructure and wear resistance of in-situ synthesized W_xC/Ni composite coating prepared with vacuum cladding

作　　者：张春华[1] 张瀚方 刘凯[2] 谭俊哲[2] 张松[1] ZHANG Chun-hua;ZHANG Han-fang;LIU Kai;TAN Jun-zhe;ZHANG Song(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Nuclear Power Pump Industry Co. Ltd.,Shenyang Blower Works Group Corporation,Shenyang 110869,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]沈阳鼓风机集团核电泵业有限公司,沈阳110869

出　　处：《沈阳工业大学学报》2019年第1期25-30,共6页Journal of Shenyang University of Technology

基　　金：国家重点研发计划项目(2016YFB1100204);沈阳市科技局计划项目(17-29-2-00;Z17-2-002;Y17-1-031)

摘　　要：为了提高煤油泵的使用寿命,利用真空熔覆技术在316L不锈钢表面原位合成了W_xC/Ni基复合涂层.采用扫描电子显微镜、能谱仪、X射线衍射仪研究了复合涂层的显微组织和相组成,并对其进行了硬度测量和摩擦性能试验.结果表明,复合涂层组织细密且与基材呈冶金结合.复合涂层主要由γ-Ni固溶体、原位生成的W_xC、(Cr,Fe)_7C_3和Cr_7C_3相组成,且W_xC相弥散分布在γ-Ni固溶体中.复合涂层的硬度约为316L不锈钢基材的4倍,相对耐磨性约为基材的37倍.In order to improve the service life of kerosene pumps,the in-situ synthesized WxC/Ni composite coating was fabricated on the surface of 316L stainless steel with the vacuum cladding technology.The microstructure and phase constitute of composite coating were characterized with the scanning electron microscope(SEM),energy dispersive spectroscope(EDS)and X ray diffractometer(XRD),and the hardness measurement and friction performance test of composite coating were also performed.The results indicate that the composite coating has dense microstructure,and displays metallurgical bonding with the substrate.The composite coating are mainly composed ofγ-Ni solid solution,in-situ synthesized WxC,(Cr,Fe)7C3and Cr7C3phases,and the WxC phase dispersively distributes in theγ-Ni solid solution.The hardness of composite coating is 4 times as that of 316L stainless steel substrate,and the relative abrasion resistance is 37 times as that of the substrate.

关 键 词：真空熔覆 原位自生 镍基合金 碳化钨 复合涂层 显微组织 显微硬度 摩擦磨损 

分 类 号：TG174.4[金属学及工艺—金属表面处理]