激光熔覆MOS2/TiC/Ni减摩耐磨复合涂层组织及磨损性能的研究Study on microstructure and wear behaviors of MoS2/TiC/Ni composite wear-resistant coating by laser cladding
陈哲源,徐江,刘文今,钟敏霖
摘要(Abstract)：
以MoS_2、TiC、Ni粉为原料,在20钢基材表面利用激光熔覆技术制备了减摩耐磨复合涂层。采用SEM和XRD对复合涂层的组织和相组成进行了研究,结果表明复合涂层主要由部分未熔的TiC颗粒、Mo_2C、γ镍基固溶体和多种两元、三元硫化物TiS、NiS、Ni_3Ti_4S_8等组成。用FALEX-6摩擦磨损实验机对MoS_2/TiC/Ni复合涂层、MoS_2/Ni激光熔覆层以及45钢的耐磨性能进行了对比,并对三种试样表面的磨损形貌进行了SEM观察。实验表明:MoS_2/Ni激光熔覆层具有最低的摩擦系数,但磨损失重最大;MoS_2/TiC/Ni复合涂层在载荷17.8N、转速200r/min条件下,磨损40分钟,其磨损失重仅为45钢的1/6。
关键词(KeyWords)： 激光熔覆;MoS_2/TiC/Ni;减摩耐磨;磨损性能
基金项目(Foundation):
作者(Author): 陈哲源,徐江,刘文今,钟敏霖
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