HVOF喷涂纳米WC-12Co涂层的性能研究  

Performance Study of Nano Structured WC–Co Coatings Sprayed by HVOF

作　　者：张云乾[1] 丁彰雄[1] 范毅[1] 

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063

出　　处：《中国表面工程》2005年第6期25-29,共5页China Surface Engineering

基　　金：国家自然基金项目资助(项目批准号:50479016)

摘　　要：为促进HVOF喷涂纳米WC–12Co涂层在工业上的应用,采用HVOF喷涂法分别制备了纳米和微米结构WC–12Co涂层。研究了涂层的结合强度,测试了两种涂层的显微硬度及耐冲蚀磨损性能,并利用扫描电镜对喷涂粉末、涂层显微组织、冲蚀表面形貌进行了分析。研究结果表明:两种涂层中纳米涂层显微硬度是普通涂层的1.5倍,最高达到1610HV,纳米涂层中WC颗粒的分布更均匀,冲蚀率是微米级涂层的1/2左右,性能更优越。Nanostructured and conventional WC-I 2Co coatings were prepared by HVOF spraying. The properties of adhesion, hardness and erosion resistance of two coatings were investigated. The characterizations of spraying powders, microstructure and surface morphology of coatings were analyzed by SEM. The results indicated that nanostructured WC 12Co coating showed better properties not only in density and hardness but also in distribution of WC and resistance of erosion than that of conventional. Micohardness reached to 1610 HV, aboutl.5 times that of conventional coating. Erosion rate reduced about half of the rate of conventional coating.

关 键 词：HVOF 纳米结构涂层 WC-12CO 

分 类 号：TG174.442[金属学及工艺—金属表面处理]