FeCoCrNiMn-WC高熵合金熔覆涂层组织与性能研究  

Study on Organisation and Properties of FeCoCrNiMn-WCHigh-entropy Alloy Cladding Coating

作　　者：王欢乐 谢渭莉 张天亮 史啸妍 刘力豪 Wang Huanle;Xie Weili;Zhang Tianliang;Shi Xiaoyan;Liu Lihao(Xi’an Heavy Equipment Pubai Coal Mine Machinery Co.,Ltd.,Weinan 715500,China;School of Materials Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]西安重装蒲白煤矿机械有限公司,陕西渭南715500 [2]陕西理工大学材料科学与工程学院,陕西汉中723000

出　　处：《煤矿机械》2024年第10期83-87,共5页Coal Mine Machinery

摘　　要：为了探究WC颗粒对熔覆涂层组织与性能的影响,采用1 200 W激光功率和6 mm/s的扫描速度在NM450钢表面制备FeCoCrNiMn-x WC高熵合金熔覆涂层。通过X射线衍射仪(XRD)、扫描电镜(SEM)、维氏显微硬度计、摩擦磨损试验机对涂层的物相、显微组织、力学性能及耐磨性能进行了研究。结果表明:当FeCoCrNiMn高熵合金涂层加入WC颗粒后,高熵合金复合涂层组织主要为FCC和BCC相,含有少量WC、W2C和Cr7C3相,显微结构为柱状晶和胞状晶组织。在10%WC复合涂层综合性能最佳,显微硬度达到最大值484.5 HV0.3;摩擦因数为0.58,磨损量和磨损率最低分别为0.011 4 g与0.857×10^(-5)g/(N·m),复合涂层的磨损方式主要为磨粒磨损与氧化磨损,并伴随黏着磨损。In order to investigate the effect of WC particles on the microstructure and properties of the cladding coating,FeCoCrNiMn-xWC high-entropy alloy cladding coating was prepared on the surface of NM450 steel with 1200 W laser power and a scanning speed of 6 mm/s.The microstructure,phase,mechanical properties and wear resistance of the coating were studied by X-ray diffraction(XRD),scanning electron microscopy(SEM),Vickers microhardness tester,friction and wear testing machine.The results show that when FeCoCrNiMn high-entropy alloy coating is added with WC particles,the organisation of the high-entropy alloy composite coating is mainly FCC and BCC phases,with a small amount of WC,W2C and Cr7C3 phases,and the microstructure is a columnar crystal and cellular crystal organisation.In 10%WC composite coating comprehensive performance is the best,microhardness reaches the maximum value of 484.5 HV0.3;friction coefficient is 0.58,the amount of the lowest wear and wear rate respectively is 0.0114 g and 0.857×10^(-5)g/(N·m),the composite coatings wear mode is mainly for abrasive wear and oxidative wear,and is accompanied by adhesive wear.

关 键 词：激光熔覆 FeCoCrNiMn高熵合金 WC颗粒 耐磨性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]