热源对原位合成WC颗粒增强铁基涂层的影响  

Effect of Heat Source on Fe-based Coating Reinforced by In-situ Synthesized WC Particles

作　　者：袁其兵 胡超[1] 陈希章[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《热加工工艺》2016年第4期162-164,共3页Hot Working Technology

摘　　要：以设定比例的Fe、W、C等粉末为反应元素,通过激光和氩弧在Q235钢基体上熔覆原位反应合成WC颗粒增强铁基涂层。利用SEM和EDS分析熔敷层组织和成分,利用显微硬度仪测量熔敷层至基体的硬度。结果表明:激光和氩弧熔敷均得到成型良好的熔敷层,激光熔敷层的硬质相主要是枝晶Fe3W3C并含有少量WC颗粒,氩弧熔敷层内硬质相都是块状WC颗粒。激光熔敷层最大硬度达906 HV,氩弧熔敷层最大硬度达1108 HV。Fe-based coating on Q235 steel reinforced by in-situ synthesized WC particles was produced by argon arc and laser melting in a certain proporation of powder mixture ofFe, W and C reaction element. The microstructure and composition of the cladding coating were analyzed by SEM and EDS and the microhardness was measured by vickers hardness tester. The results show that the coatings produced by laser and argon arc have well shaping. The hard phases in laser coating are mainly dendrites Fe3W3C and a small amount of WC, and the hard phases in argon arc coating are massive WC particles. Maximum hardness in laser coating is 906 HV, while it is 1108 HV in argonarc coating.

关 键 词：原位合成 碳化钨 激光熔敷 氩弧熔敷 

分 类 号：TG174[金属学及工艺—金属表面处理]