High-entropy alloys (HEAs) are of great interest in materials science and engineering communities owing to their unique phase structure. HEAs are constructed with five or more principal alloying elements in equimolar or near-equimolar ratios. Therefore, they can derive their performance from multiple principal elements rather than a single element. In this work, three-dimensional printing laser cladding was applied to produce an Al_0.4CoCu_0.6NiSi_0.2Ti_0.25 HEA coating. The experimental results confirmed that the laser cladding could be used to produce a thin coating of 120 μm in thickness. In the high-temperature laser cladding process, some Fe elements diffused from the substrate to the coating, forming a combination of face-centred cubic and body-centred cubic phase structures. The HEA coating metallurgically bonded well with the substrate. Owing to the increased dislocation density and number of grain boundaries, the HEA coating was harder and had a stronger hydrophobicity than X70 steel. The electrochemistry results showed that the HEA coating had better corrosion resistance than X70 steel. Aluminium oxides formed on the surface of the HEA coating had a certain protective effect. However, because of the laser cladding, the HEA coating generated cracks. In future work, the laser cladding technology will be improved and heat treatment will be implemented to prevent formation of cracks.

由于其独特的相结构，高熵合金（HEA）在材料科学和工程界引起了极大的兴趣。HEA由五个或更多等摩尔或接近等摩尔比的主要合金元素构成。因此，他们可以从多个主要要素而不是单个要素中获得绩效。在这项工作中，三维印刷激光熔覆被应用于生产Al _0.4 CoCu _0.6 NiSi _0.2 Ti _0.25HEA涂层。实验结果证实，激光熔覆可用于生产厚度为120μm的薄涂层。在高温激光熔覆过程中，一些铁元素从基底扩散到涂层，形成面心立方和体心立方相结构的组合。HEA涂层与基材冶金结合良好。由于位错密度和晶界数量的增加，HEA涂层比X70钢更硬，疏水性更强。电化学结果表明，HEA涂层比X70钢具有更好的耐腐蚀性。HEA涂层表面形成的氧化铝具有一定的保护作用。但是，由于激光熔覆，HEA涂层会产生裂纹。在以后的工作中，