Ni,Co元素对FeCrAlCu系高熵合金涂层组织和耐磨性能的影响  

Effect of Ni and Co element on microstructure and wear resistance of FeCrAlCu HEA coating

作　　者：刘建军[1,2] 马凯 丁雨田[1,2] 冯力[1,2] LIU Jianjun;MA Kai;DING Yutian;FENG Li(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]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,兰州730050

出　　处：《材料工程》2024年第1期241-248,共8页Journal of Materials Engineering

基　　金：甘肃省青年博士基金项目(2021QB-043)。

摘　　要：为了解决金属零件表面的防护问题,采用冷喷涂辅助感应重熔合成高熵合金涂层的方法,在45#钢基体表面制备FeCrAlCu,FeCrAlCuNi,FeCrAlCuCo,FeCrAlCuNiCo高熵合金涂层,通过XRD,SEM,EDS,TEM,磨擦磨损试验机等,研究Ni,Co元素添加对FeCrAlCu系高熵合金涂层的相结构、显微组织以及耐磨性能的影响。结果表明:FeCrAlCu系高熵合金涂层均为FCC+BCC相构成,其中Ni元素添加可以促进FCC相形成,Co元素添加促进B2相(AlCo)生成。FeCrAlCu系高熵合金涂层组织均为树枝晶,随着Ni,Co元素的同时添加,涂层中的枝晶数目增加,并明显粗化。Ni,Co元素同时添加时,FeCrAlCuNiCo高熵合金涂层的摩擦性能最佳,涂层的硬度为565.5HV,摩擦因数为0.349,磨损率为3.97×10^(-5)mm^(3)·N^(-1)·m^(-1)。In order to solve the protection problem of metal parts surface,the mixed metal coating was prepared on 45#steel by cold spraying,and then synthesized into FeCrAlCu,FeCrAlCuNi,FeCrAlCuCo,FeCrAlCuNiCo HEA coating by induction remelting technology.The effect of the addition of Ni and Co on the phase composition,microstructure,hardness and wear resistance of the FeCrAlCu series HEA coating were investigated by XRD,SEM,EDS,TEM,microhardness tester and abrasive wear tester,etc.The results show that the coating of FeCrAlCu series HEA is composed of FCC+BCC phase,and the addition of Ni element can promote the formation of FCC phase,and the addition of Co element can promote the formation of B2 phase(AlCo).The microstructure of FeCrAlCu HEA coating is dendrite.With the addition of Ni and Co,the dendrite number in the coating increases and coarsenes obviously.When Ni and Co are added at the same time,the friction property of FeCrAlCuNiCo HEA coating is the best.The hardness of the coating is 565.5HV,the friction coefficient is 0.349,and the wear rate is 3.97×10^(-5)mm^(3)·N^(-1)·m^(-1).

关 键 词：冷喷涂 感应重熔 高熵合金涂层 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]