摘要
氩弧熔覆FeAlCoCrCuTi_(0.4)高熵合金成本低,操作方便,熔覆层与基体结合牢固,目前有关此类的研究报道较少。利用氩弧熔覆技术在Q235钢表面制备了FeAlCoCrCuTi_(0.4)高熵合金层。借助XRD-6100型X射线衍射仪、Axiovert40 MAT倒置式金相显微镜、HV-50型维氏硬度计、磨损试验机等设备,研究了该熔覆层的微观组织结构、硬度及耐磨性能。结果表明:FeAlCoCrCuTi_(0.4)熔覆层与基体呈牢固的冶金结合,表面无气孔、裂纹等缺陷;熔覆层由晶界处大量黑色颗粒聚集的不规则晶粒构成,物相为大量的BCC相(Fe-Cr固溶体)和少量的FCC相;熔覆层硬度最高可达536.4 HV,平均硬度约是基体的3倍;磨粒磨损时以微观切削磨损机理为主,耐磨性为基体的6.85~7.44倍。
FeAlCoCrCuTi0.4 high-entropy alloy （HEA） coating was cladded on Q235 steel substrate by means of argon arc cladding. The microstructure, hardness and wear resistance of the coating were studied by means of X-ray diffractometer, metallographic microscope, Vickers hardness tester and wear tester. Results showed that the interface between coating and the substrate showed close metallurgical bonding. There were no defects such as pores and cracks on the coating surface. The coating was consisted of irregular grains with a large number of black particles at the grain boundaries, and its phase was a large number of BCC and a small amount of FCC. Furthermore, the highest hardness of coating reached 536.4 HV, which was three times as great as the average hardness of the substrate. In abrasive wear test, the wear mechanism mainly belonged to micro-cutting, and the wear resistance could reach 6.85-7.44 times as great as that of the substrate.
作者
董世知
孟旭
马壮
赵越超
DONG Shi-zhi1, MENG Xu1, MA Zhuang1, 2, ZHAO Yue-chao3(1. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China; 2. Institute of Metallurgical Engineering, Liaoning Institute of Science and Technology, Benxi 117300, China; 3. College of Engineering, Yantai Nanshan University, Longkou 265713, China)
出处
《材料保护》
CAS
CSCD
北大核心
2018年第9期8-11,共4页
Materials Protection
作者简介
[通信作者]董世知（1981-），博士，副教授，主要从事材料表面改性和金属强韧化方面研究，电话：13941809225，E-mail：xiaodong8125@163．com
