激光熔覆Ni基涂层组织性能研究  

Microstructure and Properties of Laser Cladding Ni-based Coating

作　　者：任涛 王琦 张清华 姜威 Ren Tao;Wang Qi;Zhang Qinghua;Jiang Wei(Department of Materials Science and Engineering,Shanxi Institute of Technology,Yangquan Shanxi 045000,China)

机构地区：[1]山西工程技术学院材料科学与工程系,山西阳泉045000

出　　处：《山西冶金》2024年第2期1-4,共4页Shanxi Metallurgy

基　　金：阳泉市基础研究项目(项目编号:2022JH060);矿区生态修复与固废资源化厅市共建山西省重点实验室培育基地。

摘　　要：以17-4PH沉淀硬化马氏体不锈钢叶片的激光再制造修复技术为背景,选取镍铬合金与WC-Co复合粉末作为熔覆材料,采用激光熔覆技术在17-4PH不锈钢表面制备复合涂层,通过调整激光功率和送粉速度两个工艺参数进行实验。通过观察试样熔覆层的微观组织,并对熔覆层的力学性能进行测试,结果表明:当激光功率为1700 W时,涂层的组织均匀致密。涂层的硬度和摩擦磨损性能均高于基体。最优的工艺参数激光功率为1700 W,送粉速度为30 mg/s,此工艺参数下制备的复合涂层可以有效提高17-4PH不锈钢的硬度和耐摩擦磨损性。The laser remanufacturing repair technology for 17-4PH precipitation hardening martensitic stainless steel blades is taken as study background.In this study,nickel chromium alloy and WC-Co composite powder were selected as cladding materials.Laser cladding technology was used to prepare composite coatings on the surface of 17-4PH stainless steel.Experiments were conducted by adjusting two process parameters:laser power and powder feeding speed.By observing the microstructure of the sample cladding layer and testing the mechanical properties of the cladding layer,the results showed that when the laser power was 1700 W,the microstructure of the coating was uniform and dense.The hardness and wear properties of the coating are higher than those of the substrate.The optimal process parameters are laser power of 1700 W and powder feeding speed of 30 mg/s.The composite coating prepared under these process parameters effectively improves the hardness and friction wear resistance of 17-4PH stainless steel.

关 键 词：激光熔覆 NI基复合涂层 工艺参数 组织性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]