Shallow Hilbert curve patterns with easily programmable texture density were selected for laser texturing of stainless steel substrates. Two different texture path segment lengths (12 and 24 µm) and four different laser power percentages (5%, 10%, 15%, and 20%) were investigated. The textured and smooth substrates were coated with thin polydopamine/polytetrafluoroethylene (PDA/PTFE) coatings for tribological property assessment. The effects of texture density (texture area coverage) and laser power on the durability and friction of the coated surfaces were studied. Laser texturing the substrates improved the coating durability up to 25 times, reduced the friction coefficient, and prevented coating global delamination. The textures fabricated with a laser power of 15% and a texture path segment length of 12 µm yielded the best coating durability. The textures provided the interlocking for the PTFE coating and thus prevented its global delamination. Furthermore, the PTFE inside the texture grooves replenished the solid lubricant worn away in the wear track and prolonged the coating wear life.

选择具有易于编程的纹理密度的浅希尔伯特曲线图案用于不锈钢基板的激光纹理化。研究了两种不同的纹理路径段长度（12 和 24 µm）和四种不同的激光功率百分比（5%、10%、15% 和 20%）。纹理和光滑的基材涂有薄的聚多巴胺/聚四氟乙烯 (PDA/PTFE) 涂层，用于摩擦学性能评估。研究了纹理密度（纹理区域覆盖率）和激光功率对涂层表面耐久性和摩擦力的影响。对基材进行激光纹理处理可将涂层耐久性提高 25 倍，降低摩擦系数，并防止涂层整体分层。使用 15% 的激光功率和 12 µm 的纹理路径段长度制造的纹理产生了最佳的涂层耐久性。纹理为 PTFE 涂层提供了互锁，从而防止了其整体分层。此外，纹理槽内的聚四氟乙烯补充了磨损轨迹中磨损的固体润滑剂，延长了涂层的磨损寿命。