H13钢激光熔覆Co基与H13合金涂层的组织和性能  

Microstructure and Properties of Co-based and H13 Alloy Coating on H13 Steel by Laser Cladding

作　　者：叶四友[1] 刘建永[1,2] 杨伟[1] 

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442000 [2]西安交通大学材料科学与工程学院,陕西西安710049

出　　处：《热加工工艺》2016年第6期193-195,198,共4页Hot Working Technology

基　　金：湖北省教育厅科学研究项目(Q20122302)

摘　　要：在H13钢基体上激光熔覆Co基涂层和H13合金涂层,借助光学显微镜和扫描电镜分析了涂层和基材的结合特征、涂层的显微组织形貌和成分,通过显微硬度计测试了涂层截面的显微硬度分布。结果表明:扫描速度22 mm/s,激光功率1300 W,送粉速率21 g/min时,Co基合金和H13合金涂层均与基体呈良好的冶金结合,涂层的截面显微硬度都高于H13钢基体,且H13涂层的硬度约为Co基涂层的2.5倍。Co-based alloy cladding and H13 alloy cladding were obtained on H13 steel by laser cladding. The bonding characteristics of coating and matrix, microstructure and elementary composition of the coating were investigated by OM and SEM. The microhadness distribution of the section of coating was tested by microhardness tester. The results indicate that： when scanning speed is 22 mm/s, laser power is 1300 W and feeding powder is 21 g/min, Co-based alloy cladding as well as H13 alloy cladding show good metallurgical bonding characteristics with H13 steel substrate surface; the cross-section microhardness of two claddings are higher than that of H13 steel substrate and the microhardness of H13 coating is about 2.5 times higher than that of Co-based coating.

关 键 词：激光熔覆 Co基涂层 H13合金涂层 组织 显微硬度 

分 类 号：TG174[金属学及工艺—金属表面处理]