Y_2O_3对多道搭接镍基碳化钨金属陶瓷激光熔覆层的影响  

Effect of Y_2O_3 on the Multi - track -joined Ni - WC Alloy Coatings by Laser Cladding

作　　者：赵栋[1] 白蓉[1] 晁明举[1] 梁二军[1] 

机构地区：[1]郑州大学物理工程学院河南省激光应用技术重点实验室,郑州450052

出　　处：《应用激光》2002年第2期123-126,共4页Applied Laser

基　　金：河南省杰出人才创新基金;河南省高校创新人才培养对象基金资助项目

摘　　要：向Ni基WC合金粉末中加入适量Y_2O_3,在一定条件下利用激光熔覆技术得到了高质量的多道搭接较厚熔覆层。与未加Y_2O_3的覆层相比,由于Y^(3+)离子的晶粒细化、净化、强化作用,新的覆层组织明显细化,分布更均匀;相应的显微硬度值提高且分布更加均匀;同未加Y_2O_3的原覆层相比,掺入Y_2O_3后的覆层摩擦系数更稳定,耐磨性更好。High quality nickel based WC coatings by laser cladding are obtained with addition of proper amount of Y2O3. Compared to the coatings without Y2O3, the coatings with Y2O3 possess a much finer and more uniform mi-crostructure, higher micro- hardness and much better tribological properties. Its friction coefficient remains constant during wear test while that of the coatings without Y2O3 increases quickly. We attribute the quality improvement by Y2O3 to the crystalline refinement, clarifying and strengthening effect of Y3+ .

关 键 词：激光熔覆 显微组织 耐磨性 三氧化二钇 多道搭接镍基碳化钨 金属陶瓷 

分 类 号：TG148[一般工业技术—材料科学与工程] TG174.44[金属学及工艺—金属材料]