WC-reinforced Stellite-21 coatings were prepared on AISI H13 steel by laser cladding (LC). The microstructure, phases and hardness of obtained coatings were analyzed by super-depth of field microscope (SDFM), X-ray diffraction (XRD) and microhardness tester, respectively. The effects of WC mass fraction on the coefficients of friction (COF) and wear rate of WC-reinforced Stellite-21 coatings at 550 °C were investigated. The results indicated that the undissolved WC particles act as the skeleton for the Stellite-21 coating, which has a positive effect on the improvement of hardness. The average COFs of Stellite-21-10%WC, Stellite-21-20%WC and Stellite-21-30%WC coatings are 0.447, 0.383 and 0.349, respectively, and the corresponding wear rates are 192.4, 148.6 and 101.4 μm³ N⁻¹ mm⁻¹, respectively, showing that the wear resistance increases with the increase in the WC mass fraction, and the wear mechanism is combined by the adhesive wear, abrasive wear and slight oxidative wear.

通过激光熔覆 (LC) 在 AISI H13 钢上制备 WC 增强 Stellite-21 涂层。分别采用超景深显微镜(SDFM)、X射线衍射仪(XRD)和显微硬度计对所得涂层的显微组织、物相和硬度进行了分析。研究了 WC 质量分数对 550 °C 下 WC 增强 Stellite-21 涂层的摩擦系数 (COF) 和磨损率的影响。结果表明，未溶解的 WC 颗粒作为 Stellite-21 涂层的骨架，对提高硬度具有积极作用。Stellite-21-10%WC、Stellite-21-20%WC和Stellite-21-30%WC涂层的平均摩擦系数分别为0.447、0.383和0.349，对应的磨损率为192.4、148.6和101.4 μm ³否^分别为-1 mm ^-1，表明耐磨性随WC质量分数的增加而增加，磨损机制由粘着磨损、磨粒磨损和轻微氧化磨损组合而成。