激光熔覆WC/Fe梯度涂层对40Cr合金钢抗磨损性能的影响  

Effects of Laser Cladding Fe-WC Gradient Composite Coating on Wear Resistance of 40Cr Alloy Steel

作　　者：隋琦 张硕 马翊珈 孙泽轩 陈佩强 SUI Qi;ZHANG Shuo;MA Yijia;SUN Zexuan;CHEN Peiqiang(College of Material Science and Engineering,Changchun University of Technology,Changchun 130012,China)

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《热加工工艺》2024年第16期78-83,88,共7页Hot Working Technology

基　　金：“十三五”科学技术项目(JJKH20200662KJ);吉林省自然科学基金项目(20210101389JC)。

摘　　要：利用ND-YAG激光器对40Cr钢进行表面熔覆WC增强铁基复合涂层,并且对比了单层激光熔覆、多层激光熔覆及梯度激光熔覆工艺制备的复合涂层的耐磨损性能。对比复合涂层分别为单层50%WC/Fe熔覆涂层、3层50%WC/Fe熔覆涂层、10%WC/Fe+30%WC/Fe+50%WC/Fe梯度涂层。对涂层的微观组织结构、显微硬度和耐磨性能进行了分析。讨论了不同晶粒的形成和生长机制,阐述了WC颗粒对涂层耐磨性能的影响机制。结果发现,与单层铁基WC熔覆涂层相比,多层铁基WC熔覆涂层展现出优异的抗磨损性能,其中,梯度涂层具有更高的硬度、耐磨性和较高的摩擦系数。WC-reinforced Fe matrix composite coatings on 40Cr steel were prepared by ND-YAG laser device.The wear resistance of the single-layer,the multi-layer and the gradient coatings was also tested respectively.Composite coatings for comparison are:single layer 50%WC/Fe cladding coating,three layers 50%WC/Fe cladding coating,10%WC/Fe+30%WC/Fe+50%WC/Fe gradient coating.The microstructure,micro-hardness and wear resistance of the coating materials were also analyzed.The formation and growth mechanism of different grains were discussed,and the influence mechanism of WC particles on the wear resistance of the coating was expounded.The results show that,compared with the single-layer Fe matrix WC cladding coating,the multilayer Fe matrix WC cladding coating shows excellent wear resistance.The gradient coating has higher hardness,wear resistance and higher friction coefficient.

关 键 词：激光熔覆 铁基涂层 WC颗粒 磨损性能 显微硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]