激光熔覆(FeCrCo/Ni)_5-SiTiNbMoW高熵合金涂层组织及性能研究  

Study on Microstructure and Properties of Laser Cladding(FeCrCo/Ni)_5-SiTiNbMoW High-entropy Alloy Coatings

作　　者：王茵[1] 尚晓娟 田兴强[1] 郭亚雄 汪震[1] 陈佳[2] WANG Yin;SHANG Xiao-juan;TIAN Xing-qiang;GUO Ya-xiong;WANG Zhen;CHEN Jia(Department of Mechanical and Electronic Engineering,Guizhou Communication Vocational College,Guiyang 550008,China;College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州交通职业技术学院机电工程系,贵州贵阳550008 [2]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《稀有金属与硬质合金》2018年第5期30-36,共7页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(51671061);贵州省科技计划项目(黔科合平台人才[2017]5788);贵州省科技计划项目(黔科合基础[2016]1024);贵州省高层次创新型人才培养项目(黔科合人才[2015]4009);贵州省工业攻关项目(黔科合GZ字[2015]3022)

摘　　要：通过激光熔覆技术在工具钢表面成功制备(FeCrCo/Ni)_5-SiTiNbMoW高熵合金涂层,并采用带有能谱仪的扫描电镜(SEM/EDS)、X射线衍射仪(XRD)、显微硬度计对涂层组织、成分、物相和硬度进行分析测试。结果表明,(FeCrCo)_5-SiTiNbMoW涂层含有BCC主相、少量MC相及Laves相,(FeCrNi)_5-SiTiNbMoW涂层含有FCC主相及少量MC相、Laves相;两种涂层组织均以树枝晶为主,(FeCrNi)_5-SiTiNbMoW涂层组织中同时还出现共晶组织。(FeCrCo)_5-SiTiNbMoW高熵合金涂层的显微硬度略高于(FeCrNi)_5-SiTiNbMoW高熵合金涂层。The （FeCrCo/Ni）5-SiTiNbMoW high-entropy alloy coatings were successfully prepared on the surface of the tool steel by laser cladding technology. The microstructure,composition, phase and hardness of the coatings were analyzed and tested by SEM/EDS, XRD and microhardness tester. The results show that the （FeCrCo）5-SiTiNbMoW coating contains BCC main phase,and a small amount of MC phase and Laves phase. The （FeCrNi）5-SiTiNbMoW coating contains FCC main phase and a small amount of MC phase and Laves phase. The two coatings are dominated by dendrites,while the （FeCrNi）5-SiTiNbMoW coating also has eutectic microstructure. The microhardness of the （FeCrCo）5-SiTiNbMoW high-entropy alloy coating is slightly higher than that of the （FeCrNi）5-SiTiNbMoW high-entropy alloy coating.

关 键 词：高熵合金 涂层 激光熔覆 显微组织 物相 硬度 

分 类 号：TG113[金属学及工艺—物理冶金]