激光熔覆铁基涂层显微组织和摩擦磨损性能的研究  

Investigation on the Microstructure and Wear Resistance of Laser Coated Fe-based Coating

作　　者：牛海云[1] 王开明 马鹏飞 谢立铁 麻红军 Niu Haiyun;Wang Kaiming;Ma Pengfei;Xie Litie;Ma Hongjun(School of Materials Engineering,Jiyuan Vocational and Technical College,Jiyuan 459000,Henan,China;College of Automobile and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410114,Hunan,China;Caofeidian Maintenance Branch of Beijing Shougang Machinery&Electric Co.,Ltd.,Tangshan 063200,Hebei,China)

机构地区：[1]济源职业技术学院材料工程学院,河南济源459000 [2]长沙理工大学汽车与机械工程学院,湖南长沙410114 [3]北京首钢机电有限公司曹妃甸检修分公司,河北唐山063200

出　　处：《应用激光》2023年第12期21-26,共6页Applied Laser

基　　金：长沙市自然科学基金(kq2202196)。

摘　　要：借助光纤激光器在42CrMo钢表面制备成形良好和性能优异的激光熔覆涂层。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、激光共聚焦显微镜,显微硬度计和摩擦磨损试验机研究熔覆层显微组织形貌、物相类型、化学成分以及显微硬度和往复摩擦磨损性能。结果表明,激光熔覆铁基涂层的物相主要由α-(Fe, Cr)、γ-Fe、大板块状M_(7)C_(3)和长板条状M_(23)C_(6)组成。熔覆层的摩擦磨损速率相对于基体降低了71.8%,表明其耐磨性显著提高。熔覆层的摩擦磨损机制主要包括磨粒磨损和氧化磨损。A laser cladding coating with good shape and excellent properties was prepared on 42CrMo steel by fiber laser in this study.X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and wear testing machine were used to study the microstructure,phase type,chemical composition,and wear resistance of the coating.Results show that the phases of Fe-based coating are mainly composed of α-(Fe,Cr),-Fe,large-plate M_(7)C_(3) and long-strip M_(23)C_(6).The wear rate of coating reaches 1.83X10^(-6) mm.n^(-1).min^(-1),which is 3.6 times lower compared to the matrix,indicating that the wear resistance of the coating is significantly improved.The wear mechanism of coating mainly includes abrasive wear and oxidation wear.

关 键 词：42CrMo 激光熔覆 铁基涂层 显微组织 摩擦磨损性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]