激光熔覆WC/17-4PH复合涂层组织及性能研究  

Study on Microstructure and Properties of Laser Cladding WC/17-4PH Composite Coating

作　　者：张永岩 魏彤 杨海 洪富民 孙薇薇 ZHANG Yongyan;WEI Tong;YANG Hai;HONG Fumin;SUN Weiwei(School of Mechanical Engineering,Anhui Science and Technology University,Fengyang 233100,China;School of Mechanical and Vehicle Engineering,Bengbu University,Bengbu 233000,China)

机构地区：[1]安徽科技学院机械工程学院,安徽凤阳233100 [2]蚌埠学院机械与车辆工程学院,安徽蚌埠233000

出　　处：《安阳工学院学报》2024年第6期48-52,共5页Journal of Anyang Institute of Technology

基　　金：安徽省质量工程项目(2023xjzlts075);蚌埠学院应用型项目(2024YYX03QD、2024YYX04QD)。

摘　　要：采用LaserlineLDF-3000-60型激光器在45钢表面,利用激光熔覆技术,制备不同质量分数的17-4PH+碳化钨(WC)复合涂层。借助光学显微镜、显微硬度计、摩擦磨损测试方法对熔覆层的显微组织、硬度及耐磨性检测及分析。结果表明,熔覆层的平均硬度和磨损量均随WC质量分数的增加呈现梯度增加的趋势。当WC质量分数为25%时,涂层与基材冶金结合良好,组织均匀、致密,无热裂纹及气孔等缺陷,熔覆层平均硬度为497.6 HV,相较于基体提高了153.0%;当WC质量分数为30%时,陶瓷相进一步增多,使得熔覆层出现从涂层表层至基体的贯穿裂纹,涂层硬度相较于基体提高了160.7%,磨损量为基体的26.2%。Composite coatings of 17-4PH+WC with varying mass fractions were prepared on the surface of 45 steel using the Laserline LDF-3000-60 laser cladding technique.The microstructure,hardness,and wear resistance of the fused cladding layer were examined and analyzed using an optical microscope,microhardness tester,and friction-wear testing method.The results indicate that the average hardness of the fused cladding layer increases with the WC content.When the WC mass fraction is 25%,the coating achieves good metallurgical bonding with the substrate,displaying a uniform and dense structure,free from defects such as thermal cracks and porosity.The average hardness of the fused cladding layer is 497.6 HV,which is 153.0%higher than that of the substrate.When the WC mass fraction is 30%,an increase in the ceramic phase results in the appearance of through-cracks from the coating surface to the substrate,with the coating hardness rising 160.7%compared to the substrate,and wear volume being 26.2%of that of the substrate.These findings suggest that the coating exhibits optimal performance when the WC mass fraction is 25%.

关 键 词：激光熔覆 17-4PH 碳化钨含量 复合涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]