激光熔覆送粉量对17-4PH不锈钢基碳化钨熔覆层组织及性能的影响研究  

Research on the Effect of Laser Cladding Powder Feeding Quantity on the Structure and Properties of 17-4PH Stainless Steel Based Tungsten Carbide Cladding Layer

作　　者：刘艳颖 王钰夏 张清华 Liu Yanying;Wang Yuxia;Zhang Qinghua(Shanxi Institute of Engineering and Technology,Yangquan Shanxi 045000,China;Provincial Key Laboratory for Ecological Restoration and Solid Waste Resource Utilization in Mining Areas,Jointly Built by Provinces and Cities,Yangquan Shanxi 045000,China)

机构地区：[1]山西工程技术学院,山西阳泉045000 [2]矿区生态修复与固废资源化省市共建省级重点试验室,山西阳泉045000

出　　处：《山西冶金》2024年第1期15-17,共3页Shanxi Metallurgy

基　　金：山西省科研项目“煤机装备关键零部件激光熔覆制备技术研究”(2019L0987)。

摘　　要：以机械设备摩擦损伤区域的修复与再制造为背景,选取汽轮机叶片用料17-4PH马氏体沉淀硬化不锈钢作为研究对象,采用激光熔覆技术进行表面创新修复,在17-4PH不锈钢表面以不同的送粉量熔覆Ni和WC合金粉末,观察并测试熔覆层、熔覆层与基材交界处和基材的微观结构和成分分布,测试熔覆层的力学性能,在试验过程中分析熔覆过程中送粉量对涂层品质的直接影响。试验结果表明:在相同的激光功率(1 250 W)和送粉速率(10 mm/s)下,随着送粉量的增大,熔覆层的显微硬度增大。Based on the repair and remanufacturing of friction damage areas in mechanical equipment,17-4PH martensitic precipitation hardening stainless steel used for steam turbine blades was selected as the research object.Laser cladding technology was used for innovative surface repair.Ni and WC alloy powders were melted on the surface of 17-4PH stainless steel at different powder feeding rates.The microstructure and composition distribution of the cladding layer,the interface between the cladding layer and the substrate,and the substrate were observed and tested.Test the mechanical properties of the cladding layer and analyze the direct impact of powder feeding on the coating quality during the testing process.The experimental results show that under the same laser power(1250 W)and powder feeding rate(10 mm/s),the microhardness of the cladding layer increases with the increase of powder feeding amount.

关 键 词：激光熔覆技术 微观组织 显微硬度 耐磨性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG665[金属学及工艺—金属学]