High entropy alloy (HEA) as coating material has more economical application value. In this study, CoCrFeNiTi HEA coating without cracks and pores was successfully prepared on 304 stainless steel substrate by laser cladding. The phase structure of the CoCrFeNiTi HEA coating was composed of main phase with an FCC lattice, Fe and Cr rich phase with an SC lattice and CoTi₂ type Laves phase. The microstructure of the prepared coating consisted of bonding zone and cladding zone. It was an obviously metallurgical bonding between the coating and substrate and typical columnar dendrites were generated with growth direction perpendicular to the interface in the bonding zone. The cladding zone showed a typical long strip proeutectic structure and a lamellar eutectic structure. The average microhardness of CoCrFeNiTi HEA coating reached to 568 HV_0.2, which was approximately 2.5 times higher than that of the substrate (236 HV_0.2). Erosion tests were conducted on both CoCrFeNiTi HEA coatings and the substrates with an erosion angle of 30 and 90°. The results showed that CoCrFeNiTi HEA coating exhibited much lower erosion rates with an erosion angle of 30° (0.68 mg/cm²) and 90° (0.42 mg/cm²). Ploughing and micro-cutting were the two primary erosion mechanisms of material loss for CoCrFeNiTi HEA coating at oblique erosion angles, while the erosion mechanism was replaced by the formation of craters at vertical erosion angles.

高熵合金（HEA）作为涂层材料具有更经济的应用价值。在这项研究中，成功​​地通过激光熔覆在304不锈钢基底上制备了无裂纹和孔隙的CoCrFeNiTi HEA涂层。CoCrFeNiTi HEA涂层的相结构由具有FCC晶格的主相，具有SC晶格的Co和Fe ₂富铁相组成。键入Laves相。制备的涂层的微观结构由粘结区和包层区组成。这是涂层与基材之间的明显冶金结合，并且生成了典型的柱状枝晶，其生长方向垂直于粘合区​​中的界面。熔覆区显示出典型的长条状共晶结构和层状共晶结构。CoCrFeNiTi HEA涂层的平均显微硬度达到568 HV _0.2，约为基材（236 HV _0.2）的2.5倍。）。在CoCrFeNiTi HEA涂层和基材上都进行了腐蚀试验，腐蚀角度分别为30和90°。结果表明，CoCrFeNiTi HEA涂层的腐蚀速率要低得多，腐蚀角度为30°（0.68 mg / cm ²）和90°（0.42 mg / cm ²）。犁削和微切割是在倾斜腐蚀角下CoCrFeNiTi HEA涂层材料损失的两个主要腐蚀机理，而在垂直腐蚀角处形成凹坑则代替了腐蚀机理。