激光熔覆镍基无磁合金涂层的耐磨性能  

Wear Resistance of Laser Cladded Nickel-Based Non-Magnetic Alloy Coatings

作　　者：齐悦[1] 刘海波[1] 王皓[2] 赵云[2] 

机构地区：[1]大庆钻探工程公司钻井工程技术研究院,黑龙江大庆163413 [2]北京理工大学材料科学与工程学院,北京100081

出　　处：《材料保护》2014年第7期30-32,35,共4页Materials Protection

摘　　要：无磁不锈钢耐磨性差,采用激光熔覆技术在304无磁不锈钢表面制备了3种无磁耐磨涂层,对熔覆层的显微组织、硬度、相组成和摩擦磨损性能进行了测试与分析。结果表明:无磁镍基合金熔覆层的显微硬度为393HV,比不锈钢基体提高了约60%,无磁镍基合金粉末与WC颗粒以体积比为2∶1混合的熔覆层与以3∶1混合的熔覆层的硬度均为520 HV,较基体提高了1倍;无磁合金熔覆层的抗磨损能力是不锈钢基体的2.88倍,而镍基合金粉末与WC颗粒体积比为2∶1和3∶1的混合熔覆层的抗磨损能力均为基体的6.45倍。Three kinds of Ni-based non-magnetic wear-resistant alloy coatings were prepared on 304non- magnetic stainless steel substrate by laser cladding.The microstructure and phase composition of as- prepared laser cladded coating were analyzed,and its hardness and friction and wear behavior were measured.Results indicated that laser cladded Ni-based non-magnetic coating prepared with Ni-based powder as the starting material had a microhardness of 393 HV,which was higher than that of the stainless steel substrate by 60%.After non-magnetic Ni-based powder was mixed with WC particulate at a volume fraction of 2:1 and 3:1,resultant laser cladded coatings both exhibited a microhardness of 520 HV,which was double as compared with the microhardness of the stainless steel substrate.The wear- resistant ability of the non- magnetic Ni-based coating prepared with Ni- based powder alone was 2.88 times as much as that of the stainless steel substrate,while the wear-resistant ability of the two kinds of blended laser cladded coatings was 6.45 times as much as that of the steel substrate.

关 键 词：镍基合金涂层 耐磨性 硬度 激光熔覆 无磁镍基合金粉末 WC颗粒 304无磁不锈钢 

分 类 号：TG174.4[金属学及工艺—金属表面处理]