WC-Co添加量对激光熔覆镍基涂层微观结构及摩擦学性能的影响  

Effect of WC-Co Content on Microstructure and Wear Resistance of Nickel-Based Laser Cladding Coatings

作　　者：郭纯[1,2] 陈建敏[1] 周健松[1] 赵杰荣[1,2] 王凌倩[1,2] 俞友军[1,2] 周惠娣[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院北京研究生院,北京100049

出　　处：《材料保护》2012年第1期23-26,78,共4页Materials Protection

基　　金：国家自然科学基金(51045004);中科院知识创新工程项目(YYYJ-0913)资助

摘　　要：为了使激光熔覆镍基耐磨涂层得到更广泛的应用,通过激光熔覆技术在1Cr18Ni9Ti不锈钢表面制备了NiCrBSi/WC-Co镍基涂层,研究了WC-Co添加量对涂层微观结构及摩擦学性能的影响。结果表明:随WC-Co添加量的增加,镍基涂层的结构由枝晶和枝晶间的共晶逐渐向球状晶和块状晶转变,涂层的硬度和耐磨性增加。Ni-based composite coatings(NiCrBSi/WC-Co) with different contents of WC-Co were prepared on 1Cr18Ni9Ti stainless steel substrate by laser cladding.The effect of WC-Co dosage on the microstructure and wear resistance of the composite coatings was investigated.It was found that the microhardness and wear resistance of the Ni-based composite coatings were greatly increased with increasing WC-Co content.In the meantime,incorporating WC-Co transferred the microstructure of the coatings from dendrite and inter-dendrite eutectics to sphere-like and block-like crystals.

关 键 词：激光熔覆 镍基涂层 1CR18NI9TI WC-CO 微观结构 摩擦学性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]