目的 研究抑制玻璃冲头表面热疲劳裂纹失效和粘着磨损的规律。方法 利用高温松弛软化带辅助激光熔覆制备复合涂层，以Ni60+35%WC(质量分数)粉末作为复合涂层材料，45^#钢作为基体材料，316不锈钢网作为高温松弛软化带，研究高温松弛软化带对复合涂层组织结构及其耐磨性能的影响。结果 未加316不锈钢网时，复合涂层表面的磨损量和摩擦因数分别0.04 g和0.32，磨痕宽度为(2120±250) μm，残余拉应力较大且分布不均衡，伴随有大量裂纹产生。加入316不锈钢网后，复合涂层表面的磨损量和摩擦因数分别为0.03 g和0.25，磨痕宽度为(1202±100) μm，残余拉应力小且分布较均衡，伴随有少量裂纹产生。316不锈钢网可以吸收复合涂层表面的残余拉应力，减少裂纹扩展甚至形成无裂纹的复合涂层，使复合涂层表面纵向和横向残余应力分布均衡，同时添加Ni60+35%WC(质量分数)粉末可提高复合涂层表面的耐磨性和硬度。结论 通过在玻璃冲头表面加入高温松弛软化带辅助激光熔覆制备复合涂层可以显著提高其硬度和耐磨性，并抑制复合涂层表面裂纹的产生与扩展。

The work aims to study the law of inhibiting the failure of thermal fatigue crack and adhesive wear on the surface of glass punch. The composite coating was prepared by high temperature relaxation softening zone aided with laser cladding, and the effect of high temperature relaxation softening zone on the structure and wear resistance of composite coating was studied with Ni60+35% WC (mass fraction) powder as a composite coating material, 45# steel as base material, and 316 stainless steel mesh as high temperature relaxation softening zone. Before adding 316 stainless steel mesh, the surface abrasion and friction coefficient of the composite coating were 0.04 g and 0.32 respectively. In addition, the width of the wear scar on the surface of the composite coating was (2120±250) μm The residual tensile stress was large and unevenly distributed, accompanied by a large number of cracks. After adding 316 stainless steel mesh, the surface abrasion and friction coefficient of the composite coating were 0.03 g and 0.25, respectively, the width of the wear scar was (1202±100) μm. The residual tensile stress was small and evenly distributed. The 316 stainless steel mesh can absorb the residual tensile stress of composite coating, inhibit the propagation of cracks and even form a crack-free composite coating, so that the longitudinal and transverse residual stress distribution of composite coating surface can be balanced. At the same time, the surface of the composite coating had high wear resistance and hardness due to the simultaneous addition of Ni60+35% WC (mass fraction) powder. The final result fully shows that, high temperature relaxation softening zone aided with laser cladding on the surface of the glass punch can significantly improve the hardness and wear resistance of the composite coating, and inhibit the generation and propagation of surface cracks of the composite coating.