在H13钢表面进行了激光熔覆Ni基合金+WC粉末实验,测试了熔覆层的组织和性能。实验表明激光熔覆可以得到组织致密,晶粒细化,稀释率低,与基体结合牢固的表面强化层。熔覆层的平均硬度为630 HV0.2,耐磨损性能比基体提高145%。H13钢是常用热作模具钢之一,由于工作条件恶劣,经常发生磨损失效,经激光熔覆强化后,其使用寿命将大大提高。 Laser cladding Ni-based alloy + WC powder was carried out on the surface of H13 steel to test the microstructure and properties of the cladding. Experiments show that the laser cladding can get dense structure, grain refinement, dilution rate is low, and the substrate with a solid surface strengthening layer. The average hardness of the cladding is 630 HV0.2, wear resistance than the matrix increased by 145%. H13 steel is one of the commonly used hot work die steel, due to poor working conditions, wear and tear often occur failure, after laser cladding strengthened, its service life will be greatly enhanced.