半导体激光熔覆与超音速火焰喷涂Ni60粉末组织与性能的研究  

Study on Microstructure and Properties of Ni60 Powder By Diode Laser Cladding and High Velocity Oxy-fuel

作　　者：李正秋[1] 张志坚[1] 石玗[1] 苏义祥[1] 曹驰[2] LI Zhengqiu ZHANG Zhijian SHI Yu SU Yixiang CAO Chi(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology Lanzhou 730050, China Wenzhou Pump and Valve Engineering Research Institute of Lanzhou University of Technology Wenzhou 325105, China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105

出　　处：《热加工工艺》2017年第20期149-151,共3页Hot Working Technology

基　　金：国家火炬计划资助项目(2015GH531401);温州市激光与光电产业集群科技专项资助项目(j20130014)

摘　　要：分别用半导体激光与超音速火焰喷涂设备在45钢基体上制备Ni60合金涂层。用扫描电镜、金相显微镜、XRD对熔覆层进行微观组织和成分的研究。并对熔覆层的显微硬度和耐磨性进行分析。结果表明:激光熔覆层质量良好、无缺陷,熔敷层与基体之间形成良好的冶金结合;超音速火焰喷涂的熔覆层与基体为机械结合,结合力相对较弱。激光熔覆层内组织致密、晶粒细小且析出了C化物与Cr化物,这使激光熔敷层的硬度与耐磨性高于超音速火焰喷涂。Using diode laser and high velocity oxy-fuel, respectively, Ni60 alloying coatings were deposited on 45 steel matrix. Using SEM, metallurgical microscope and XRD, the microstructure and composition of the cladding layer were studied. The microhardness and wear resistance of the cladding layer were analyzed. The results show that laser cladding coating has good quality and no defects and the cladding layer has good metallurgical bonding with the base metal. There is a good mechanically bonding between the cladding coating and matrix after high velocity oxy-fuel and the bonding force is relative small. The laser cladding coating has dense microstructure and small grain, C and Cr compounds precipitate in laser cladding coating, which can make hardness and wear resistane of laser cladding coating higher than that of high velocity oxy-fuel.

关 键 词：激光熔覆 超音速火焰喷涂 组织 性能 

分 类 号：TG456.7[金属学及工艺—焊接] TG174