钨极氩弧熔敷技术制备含TiC颗粒增强涂层的研究  

Study on the microstructures of in-situ TiC particle reinforced composites coating layer processed by Tungsten arc welding

作　　者：宋思利[1] 邹增大[1] 王新洪[1] 李清明[1] 

机构地区：[1]山东大学材料科学与工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2006年第3期1-4,12,共5页Journal of Shandong University（Engineering Science）

基　　金：教育部博士点基金资助项目(20020422032)

摘　　要：在碳钢基体表面预涂一定混合比例的钛铁和石墨,用钨极氩弧热源熔敷,使Ti元素和C元素在高温下原位反应,获得TiC颗粒增强的综合性能优异的铁基复合材料涂层;试验测试和分析表明,熔敷层中原位生成了TiC增强颗粒;熔敷层微观组织主要有珠光体、铁素体、马氏体、少量残余奥氏体、TiC颗粒等组成;涂层表面硬度达到了HRC55以上;越靠近熔覆层表面,硬度越高,具备良好的耐磨性能.The in-situ TiC particle reinforced composites coating layer had been produced by prepared ilmenite and graphite powder on carbon steel through metallurgy interaction in tungsten arc welding. The result shows that the microstructure of coating layer includes peadite, ferrite, martensite, residual austenitic and in-situ TiC par- ticles and the TiC particles dispersed in matrix compounds of martensite and residual austenitic. The composite coating layer has higher surface rigidity of exceed HRC 55 and better abrasion resistance property.

关 键 词：钨极氩弧熔敷 熔敷层(涂层) TIC颗粒 微观组织 宏观硬度 

分 类 号：TG423[金属学及工艺—焊接]