激光熔敷制备高速钢涂层  

High speed steel coating produced by laser cladding

作　　者：尹燕[1] 路超[1] 刘鹏宇[1] 肖梦智 蔡伟军 张瑞华 屈岳波 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]阳江市五金刀剪产业技术研究院,广东阳江529533 [3]中国钢研科技集团有限公司,北京100081

出　　处：《电焊机》2017年第10期99-103,共5页Electric Welding Machine

基　　金：广东省2015年省前沿与关键技术创新专项资金(重大科技专项)项目资助(2015B010123002);阳江市2015年度新型研发机构建设;工程技术研究开发中心建设;企业实验室专项资金项目资助(2015019);阳江2016年科技发展专项资金(协同创新与平台环境建设方向)资助(2060502);兰州理工大学学生科技创新基金资助项目(S20);"广东省"扬帆计划引进创新创业团队专项资助(2015YT02G090)

摘　　要：为了利用高速钢的优良性能,拓展其应用范围、降低使用成本,采用同轴送粉激光熔敷技术,在3mm厚的普通用不锈钢侧面制备高硬度的高速钢耐磨涂层,并对熔敷后的试样进行热处理。分析涂层的显微组织,研究热处理制度对涂层显微硬度的影响,测试涂层的耐磨性能。结果表明:涂层热处理前主要为细小等轴晶,组织为淬火马氏体+残留奥氏体+少量碳化物;热处理后主要为回火马氏体+少量残留奥氏体+大量析出碳化物;获得了最佳热处理参数,热处理后涂层硬度大幅度提高,约为基材的2倍;相同磨损条件下,耐磨涂层的磨损失质量仅为基体的1/5。In order to take advantage of the excellent performance of high speed steel and expand its application area and reduce its cost,high hardness high speed steel wear resistant coating was produced on the side surface of stainless steel with a thickness of 3 mm by the coaxial powder feeding laser cladding technology and then some heat treatment of the samples were carried out. The microstructure of the coatings was analyzed, and the effect of heat treatment on the micro-hardness of the coating was studied. The wear resistance of the coating was tested. The results showed that the microstructure of the coating before heat treatment is small equiaxed grain,and the microstructure of the coating consists of quenched rnartensite,retained austenite and a small amount of carbides and tempered martensite,a small amount of retained austenite and a large number of precipitated carbides after heat treatment. The best heat treatment parameters were obtained,and the hardness of the coating was greatly improved after heat treatment,which was about 2 times than that of the substrate. The wear loss of the coating was only 1/5 compared to substrate.

关 键 词：高速钢 激光熔敷 涂层 显微组织 

分 类 号：TN24[电子电信—物理电子学] TG11[金属学及工艺—物理冶金]