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在激光冲击强化技术中,充当能量转换体的涂层厚度问题是影响激光冲击强化效果的关键技术之一。许多研究者认为激光冲击强化处理技术中的涂层应有一个最佳值。涂层过厚,剩余涂层会对激光冲击波产生损耗;涂层过薄,又使金属表面产生气化,二者均会影响激光冲击强化效果。本文从激光与涂层相互作用的物理机理,研究推导了激光冲击涂层的理论厚度计算公式,并从工件表面状态、涂层和约束层等相关环境因素出发,讨论了它们对涂层厚度理论计算的影响,得到了具体工况条件下激光冲击涂层厚度的理论估算公式。
In the laser shock enhancement technology, the problem of the coating thickness acting as the energy converter is one of the key technologies that affect the laser shock enhancement effect. Many researchers believe that the laser shock enhancement treatment of the coating should have an optimum value. The coating is too thick, the remaining coating will produce laser shock wave loss; coating is too thin, but also the metal surface gasification, both will affect the laser shock enhancement. Based on the physical mechanism of the interaction between laser and coating, this paper deduces the theoretical formula of laser shock coating. Based on the surface conditions of the workpiece, the relevant environmental factors such as coating and constraining layer, The theoretical calculation formula of laser shock coating thickness under specific operating conditions was obtained.