激光重熔合成FeCrAlCu(Ni,Co)高熵合金涂层组织与耐磨性能
Microstructure and Wear Resistance Properties of FeCrAl-Cu(Ni,Co)HEA Coatings Synthesized by Laser Remelting
马凯 1冯力 1赵燕春 1刘建军1
作者信息
- 1. 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
- 折叠
摘要
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3.72×10-5mm3·N-1·m-1.磨损机制为粘着磨损和磨粒磨损.
Abstract
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 mm3·N-1·m-1.The predominant wear mechanism is the adhesive wear and abrasive wear.
关键词
激光重熔/高熵合金涂层/磨损机制/耐磨性Key words
laser remelting/high-entropy alloy coating/wear mechanism/abrasion resistance引用本文复制引用
基金项目
China National Nuclear Power Plant Operation(QS4FY-22003224)
出版年
2024
NETL
NSTL
万方数据