采用 5kW大功率激光器在不锈钢基材上熔覆Co基合金 ,制取的涂层质量优于传统的电弧、火焰堆焊以及等离子喷焊工艺制取的涂层。对氮肥生产线上甲胺泵中的进排液组合阀多冲接触表面进行激光熔覆 ,成功地实现了传统工艺难以完成的涂层强化工艺。上线应用证明其抗多冲接触载荷的能力明显增强。承受多冲接触载荷的表面强化涂层质量与强化工艺、基体和涂层材料、涂层厚度等有关。涂层厚度应根据多冲接触载荷的性质、应力大小、基体等情况来决定 ,太薄的涂层会造成或加剧涂层开裂、塌陷等失效行为。激光熔覆为工程中承受多冲载荷的重要零部件表面强化提供了一种更好的工艺方法 Using 5kW high power laser cladding Co-based alloy on stainless steel substrate, the quality of the prepared coating is better than that of the traditional arc welding, flame welding and plasma spray welding. In the nitrogen production line methylamine pump inlet and exhaust valve multi-contact surface laser cladding, successfully achieved the traditional process is difficult to complete the coating strengthening process. The on-line application proved its ability to resist multiple red impact loads significantly. The surface-enhanced coating that withstands multiple impact loads is related to reinforcement processes, substrate and coating materials, and coating thickness. Coating thickness should be based on the nature of multi-impact contact load, stress, matrix and other circumstances to decide, too thin coating can cause or aggravate coating cracking, collapse and other failure behavior. Laser Cladding provides a better process for the surface strengthening of critical parts subjected to multiple blanking loads in engineering