FeCoCrNiMo high-entropy alloy (HEA) has attracted great interests due to its excellent corrosion resistance, but it suffers relatively low hardness and poor tribological performance. In this work, a systematic study on microstructural evolution and tribological behavior of equiatomic FeCoCrNiMoSi_x (x = 0.5, 1.0, 1.5) HEA coatings prepared by laser cladding (LC) on Q235 steel substrates is reported. Confirmed by X-ray diffraction analysis (XRD) and energy dispersive spectrometry (EDS) results, these coatings mainly consist of Fe-rich FCC and FeMoSi phases. The increase of Si content leads to greater lattice distortion and promotes the formation of Si-rich intermetallics, which can significantly improve the hardness and the wear resistance of the FeCoCrNiMoSi_x coatings. The best wear resistance is achieved in FeCoCrNiMoSi_1.0 coating, which the wear mechanism is a combined abrasive and adhesive wear.

FeCoCrNiMo高熵合金（HEA）由于其优异的耐腐蚀性能引起了人们的极大兴趣，但它的硬度相对较低，摩擦学性能较差。在这项工作中，系统研究了通过激光熔覆 (LC) 在 Q235 钢基材上制备的等原子 FeCoCrNiMoSi _x (x = 0.5, 1.0, 1.5) HEA 涂层的微观结构演变和摩擦学行为。通过 X 射线衍射分析 (XRD) 和能量色散谱 (EDS) 结果证实，这些涂层主要由富铁 FCC 和 FeMoSi 相组成。Si含量的增加导致更大的晶格畸变并促进富Si金属间化合物的形成，可显着提高FeCoCrNiMoSi _x的硬度和耐磨性涂料。FeCoCrNiMoSi _1.0涂层的耐磨性最好，其磨损机制是磨料和粘着磨损的结合。