氩弧熔覆TiCrCuFeNi高熵合金涂层的组织与性能

Microstructure and Properties of TiCrCuFeNi High-Entropy Alloy Coating Prepared by Argon Arc Cladding

摘要: 采用氩弧熔覆工艺在Q235钢基体上制备了TiCrCuFeNi高熵合金涂层, 采用SEM、EDS、XRD等对该涂层的组织进行了分析, 并对其硬度、耐磨性、耐蚀性进行研究。结果表明: 高熵合金涂层主要由FCC固溶体、BCC固溶体及Laves相组成; 涂层表面显微硬度可达754.5 HV; 涂层的耐磨性较好, 优于熔覆钴基合金涂层的, 干磨时主要磨损机理为磨粒磨损和粘着磨损; 涂层在3.5%NaCl溶液中的耐蚀性比06Cr19Ni10不锈钢的优异。

Abstract: TiCrCuFeNi high-entropy alloy (HEA) coating had been cladded on Q235 steel substrate by means of argon arc cladding. The microstructure was investigated by SEM, EDS, XRD, then the hardness, wear resistance and corrosion resistance were also studied. The results show that the TiCrCuFeNi HEA coating consisted of FCC solid solution, BCC solid solution and the Laves phases. The microhardness of the coating was 754.5 HV. The HEA coating had good wear resistance better than the Co-based cladding coating. The dominant wear mechanism of the coating in dry wear was abrasive wear and adhesive wear. And the corrosion resistance of HEA coating was better than that of 06Cr19Ni10 stainless steel in 3.5% NaCl solution.