DC53 tool steel has potential applications in mold product manufacturing because of its excellent toughness properties. However, it suffers from poor wear resistance, which limits its wide range of applications. A micron-size fish-scale film structure was designed on the DC53 steel surface and fabricated using crossover laser surface remelting processing to improve its tribological properties. Three kinds of DC53 surfaces, including the as-received, quenched, and fish-scale film structure, were used to evaluate the tribological properties. Specifically, tribological performance was evaluated using a reciprocating sliding tester. The unidirectional ball-on-disc method was employed to assess the wear of the mating surfaces under low-, medium-, and high-load conditions in terms of friction and wear tests. The friction coefficient and the wear rate were recorded to investigate the formation mechanism of tribo-layers. Experimental results demonstrated that the structure combined with microbulges on the DC53 surface had excellent load-bearing capabilities and wear resistance. Energy dispersive spectroscopy following wear tests showed pronounced material transfer from the structured surfaces, with SiO₂ particles filling up some groove voids. The reinforcing layer in the form of nanoscale SiO₂ particles exhibited enhanced performance at higher tribological loads. The synergistic effects of microbulges and SiO₂ films significantly improved the tribological properties of DC53 materials. In addition, the precipitation of SiO₂ contributed to the anti-wear performance of the tool steel surface, which is consistent with the self-lubricating wear mechanism of the worn surface. The laser surface remelting technique enables the fabrication of a micro fish-scale film structure, which has great potential for enhancing the wear resistance and applications of DC53 materials in various fields.

DC53工具钢因其优异的韧性性能，在模具产品制造中具有潜在的应用前景。但其耐磨性​​较差，限制了其广泛的应用。在DC53钢表面设计微米级鱼鳞膜结构，并采用交叉激光表面重熔工艺制造，以提高其摩擦学性能。使用三种 DC53 表面（包括原样、淬火和鱼鳞膜结构）来评估摩擦学性能。具体而言，使用往复滑动试验机评价摩擦学性能。采用单向球盘法在摩擦磨损试验中评估低、中、高载荷条件下配合表面的磨损情况。记录摩擦系数和磨损率以研究摩擦层的形成机制。实验结果表明，DC53表面微凸起结合的结构具有优异的承载能力和耐磨性。磨损测试后的能量色散光谱显示，结构化表面有明显的材料转移，其中 SiO ₂颗粒填充了一些凹槽空隙。纳米级SiO ₂颗粒形式的增强层在较高摩擦载荷下表现出增强的性能。微凸起和SiO ₂薄膜的协同作用显着改善了DC53材料的摩擦学性能。此外，SiO ₂的析出有助于工具钢表面的抗磨损性能，这与磨损表面的自润滑磨损机制一致。激光表面重熔技术可以制备微鱼鳞状薄膜结构，对于增强DC53材料的耐磨性和在各个领域的应用具有巨大的潜力。