45钢表面激光熔覆WC/Co金属陶瓷  

LASER CLADDING WC/Co METAL CERAMIC ON 45 STEEL

作　　者：陈传忠[1] 于慧君[1] 侯勇[1] 王国敦 于家洪 雷廷权[2] 

机构地区：[1]山东工业大学 [2]哈尔滨工业大学

出　　处：《陶瓷学报》1998年第3期137-143,共7页Journal of Ceramics

基　　金：山东省教委资助

摘　　要：研究了45钢表面WC／Co金属陶瓷激光熔覆层的组织、界面特征及其形成机制,分析了激光熔覆层中涂层元素和硬度的分布特征。结果表明,激光熔覆使WC／Co等离子喷涂层的片层状组织特征消除,形成了连续致密的熔覆层;由于涂层中不同部位的成分。温度分布及冷速不同使初生相呈树枝状、多边形块状、花瓣状、条状及颗粒状等几种形态;实现了涂层与基体间的冶金结合,结合带宽度约3-5μp;涂层硬度达1794HV0.1。In this paper the structure and intefface structural characteristics of WC/Co laser cladded coatings, as well as their forming mechanism is researched. The distribution characteristics of composition and hardness of the coatings is analyzed. The results show that laser cladding can cause the elimination of the lamallar structural charateristics of plasma sprayed WC/Co coatings and the formation of the continuous and compact cladding coatings. Different composition , temperature gradient and cooling speed in diffrent areas of the coatings lead to the primary phase has several kinds of structural feathers, such as dendritic,polygon lumpish, petaloitic, lathy and particlate. The metallurgical combining interface between the cladding coating and matrix is achieved, the bonding zone width is about 3～5μm. The microhardness of WC/Co coating cladded by laser comes up to 1794HV0.1.

关 键 词：激光熔覆 涂层 45钢 钴 碳化钨 陶瓷复层 

分 类 号：TG174.453[金属学及工艺—金属表面处理] TG135.5[金属学及工艺—金属学]