Mo含量对激光熔覆铁基涂层组织和性能的影响  

Effect of Mo Content on Microstructure and Properties of Laser Clad Fe-based Coatings

作　　者：章浩 师文庆 贾东贺 梁飞龙[2] ZHANG Hao;SHI Wenqing;JIA Donghe;LIANG Feilong(School of Electronics and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;College of Shipping and Ocean transportation,Guangdong Ocean University,Zhanjiang 524005,China)

机构地区：[1]广东海洋大学电子与信息工程学院,广东湛江524088 [2]广东海洋大学船舶与海运学院,广东湛江524005

出　　处：《热加工工艺》2024年第24期116-120,共5页Hot Working Technology

基　　金：广东省普通高校重点领域专项项目(2020ZDZX2061);国家自然科学基金项目(62073089)。

摘　　要：为了增强Q235碳素钢的表面硬度和耐蚀性能,采用激光熔覆技术在其表面制备了Fe60+Mo复合涂层。对涂层的显微组织、显微硬度、耐磨性和耐蚀性能进行了分析。结果表明,随着Mo含量的增加,熔覆层的微观硬度先增高后降低,当Mo添加量达到5wt%时,显微硬度最高为1030 HV,同时,该熔覆层耐磨性最好,比未添加Mo的熔覆层提高了1.8倍。通过电化学腐蚀测试的结果表明,加入少量的Mo可以提高铁基涂层的耐蚀性。此研究结果对激光熔覆添加Mo的铁基涂层制备有一定的指导作用。In order to enhance the surface hardness and corrosion resistance of Q235 carbon steel,Fe60+Mo composite coating was prepared on its surface by laser cladding.The microstructure,microhardness,wear resistance and corrosion resistance of the coatings were analyzed.The results show that the microhardness of the fused cladding layer increases first and then decreases with the increase of Mo content,and the microhardness is up to 1030 HV when the addition of Mo reaches 5wt%,and at the same time,the fused cladding layer has the best abrasion resistance,which is 1.8 times higher than that of the fused cladding layer with no added Mo.The results of electrochemical corrosion tests show that the addition of a small amount of Mo can improve the corrosion resistance of iron-based coatings.The results of the study are instructive for the preparation of Mo-added iron-based coatings by laser cladding.

关 键 词：激光熔覆 Q235碳素钢 Mo含量 微观硬度 耐磨性 电化学腐蚀 

分 类 号：TG174.4[金属学及工艺—金属表面处理]