摘要
使用激光熔覆法制备了铈掺杂镍基碳化钨涂层,使用X射线衍射仪和扫描电镜观察了涂层的相组成与微观结构,使用摩擦磨损和冲蚀磨损试验测定了室温、400℃和800℃下涂层的耐磨性能。结果表明,微量的CeO2可以抑制WC在高温下的分解反应,细化碳化物晶粒,减少裂纹的产生和扩展。CeO2添加量为0.5wt%时,涂层的显微硬度最高,在不同温度下的耐磨性能最好。
Ni based-WC coating with Ce doped was prepared by laser cladding.The microstructure of laser clad coating was investigated by means of XRD and SEM.Wear resistance of the coating was tested by sliding wear and impact abrasion wear tests at room temperature,400℃and 800℃,respectively.The results showed that the coating with a small amount of CeO2 can inhibit the decomposition reaction of WC at high temperature,refine the grains sizes of carbides and reduce the formation and propagation of cracks.The coating with 0.5wt%CeO2 presents the highest microhardness and the best wear resistance at different temperatures.
作者
陈川辉
陈彦
沈剑标
王文明
Chen Chuanhui;Chen Yan;Shen Jianbiao;Wang Wenming(Wuxi Smart Aut)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第12期192-197,共6页
Heat Treatment of Metals
关键词
激光融覆
镍基碳化钨
耐磨
稀土
laser cladding
Ni-based tungsten carbide
wear resistance
rare earth