Microstructure and Wear Resistance Properties of FeCrAl-Cu(Ni,Co)HEA Coatings Synthesized by Laser Remelting  

激光重熔合成FeCrAlCu(Ni,Co)高熵合金涂层组织与耐磨性能

作　　者：Ma Kai Feng Li Zhao Yanchun Liu Jianjun 马凯;冯力;赵燕春;刘建军(兰州理工大学材料科学与工程学院,甘肃兰州730050;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)

机构地区：[1]School of Materials Science and Technology,Lanzhou University of Technology,Lanzhou 730050,China [2]State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China

出　　处：《稀有金属材料与工程》2024年第10期2747-2754,共8页Rare Metal Materials and Engineering

基　　金：Supported by China National Nuclear Power Plant Operation(QS4FY-22003224)。

摘　　要：FeCrAlCu,FeCrAlCuNi,FeCrAlCuCo,and FeCrAlCuNiCo high-entropy alloy(HEA)coatings were synthesized on the surface of 45#steel through cold spraying-assisted laser remelting.Results reveal that all four HEA coatings are composed of face-centered cubic+body-centered cubic phases.Additionally,the microstructure of the coatings consists of columnar dendrites.With the simultaneous addition of both Ni and Co elements,the columnar dendritic grains are gradually refined in the coating.Moreover,the FeCrAlCuNiCo HEA coating exhibits excellent friction performance with the coating hardness of 5847.7 MPa,friction factor of 0.45,and wear rate of 3.72×10^(−5) mm^(3)·N^(−1)·m^(−1).The predominant wear mechanism is the adhesive wear and abrasive wear.通过冷喷涂辅助激光重熔合成高熵合金涂层,在45#钢表面制备FeCrAlCu、FeCrAlCuNi、FeCrAlCuCo和FeCrAlCuNiCo高熵合金涂层。结果表明,这4种高熵合金涂层均由面心立方+体心立方相构成,涂层的组织由柱状树枝晶构成。随着Ni、Co元素的同时添加,涂层中的柱状树枝晶晶粒逐渐细化。FeCrAlCuNiCo高熵合金涂层的摩擦性能最佳,涂层的硬度为5847.7 MPa,摩擦因数为0.45,磨损率为3.72×10^(−5) mm^(3)·N^(−1)·m^(−1)。磨损机制为粘着磨损和磨粒磨损。

关 键 词：laser remelting high-entropy alloy coating wear mechanism abrasion resistance 

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]