HVOF制备的多峰WC-12Co涂层摩擦磨损特性  

Friction and Wear Characteristics of Multimodal WC-12Co Coatings Deposited by HVOF

作　　者：丁彰雄[1] 陈伟[1] 王群[2] 曹正黄[1] 

机构地区：[1]武汉理工大学能源与动力工程学院,湖北武汉430063 [2]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《摩擦学学报》2011年第5期425-430,共6页Tribology

基　　金：国家自然科学基金项目(50479016)资助~~

摘　　要：本文采用超音速火焰喷涂(HVOF)工艺制备了2种多峰结构和1种亚微米结构WC-12Co涂层,并采用SEM、XRD等方法对3种涂层进行了显微组织、孔隙率、相结构及显微硬度分析;在进行涂层球盘摩擦磨损试验的基础上,探讨了多峰WC-12Co涂层的磨损机理.研究结果表明:由含30%纳米WC-12Co的粉末制备的多峰涂层WC氧化脱碳程度最低,显微硬度最高;采用含50%纳米WC-12Co的粉末制备的多峰涂层孔隙率最低、耐磨损性能最为优良.In the present paper,two WC-12Co cermet coatings that have a multimodal structure and one WC-12Co cermet coating that has a submicron structure were deposited by high velocity oxygen fuel（HVOF） process,and the microstructure,porosity,phase structure and microhardness of the two coatings were analyzed by using scanning electron microscopy（SEM） and x-ray diffraction（XRD）.The friction and wear characteristics of the two coatings were carried out on a ball-on-disc tribo-tester and the wear mechanisms of the two WC-12Co coatings were explored.Results show that the multimodal structured coating deposited by powders containing 30% nano-size WC-12Co particles had the lowest degree of decarburization during spraying and the highest microhardness.In addition,the multimodal structured coating deposited by the powders containing 50% nano-size WC-12Co particles had the lowest porosity and the highest wear resistance.

关 键 词：超音速火焰喷涂(HVOF) WC-12CO涂层 多峰结构 耐磨性 摩擦 

分 类 号：TG174.442[金属学及工艺—金属表面处理]