After preparing the CoCrFeNiMoW high-entropy alloy coating via laser cladding, micro-dimple textures with varying diameters (70 μm, 100 μm, and 200 μm) and area ratios were fabricated on the coating surface using laser surface texturing. The results reveal that the coating's microstructure mainly comprises petal-like dendrites, fishbone-like dendrites, and incompletely melted W particles. The average microhardness of the coating is 647.7 HV 0.2, approximately 3.9 times that of the substrate (45 steel). The high hardness is attributed to second-phase strengthening, solid solution strengthening, and grain refinement strengthening. The present work then compares the dry friction performance of the high-entropy alloy surface with different micro-texturing parameters under a normal load of 4.9 N and a reciprocating speed of 6 m/min. The original high-entropy alloy surface experiences abrasive and adhesive wear, accompanied by severe oxidation. Micro-dimples with a 100 μm diameter reduce abrasive wear by capturing and storing grinding debris, and mitigate adhesive wear and oxidation by minimizing direct contact between friction counterparts. Samples with the textured surface featuring 100 μm diameter micro-dimples exhibit different wear mechanisms depending on the area ratio. At a 4 % area ratio, the sample primarily undergoes minor abrasive wear. At 8 %, it mainly experiences abrasive wear with minor adhesive wear. At 12 %, the dominant wear mechanism is adhesive wear with minor abrasive wear. The surface-textured specimen with 100-μm-diameter micro-dimples at a 4 % area ratio exhibited the best friction and wear resistance, with a reduction in friction coefficient and wear volume of 7.73 % and 42.04 %, respectively. This study developed a novel approach to enhance anti-friction and wear resistance in high-entropy alloy surfaces.
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