论文部分内容阅读
基于纳米压痕仪,研究不同激光工艺参数下制备镍基合金激光熔覆层力学性能的变化规律,并分析不同激光工艺参数对熔覆层力学性能的影响,探索最佳激光熔覆工艺参数。研究发现,熔覆层的硬度值随着激光扫描速度的增大而增大,随着激光功率的增大而降低;镍基熔覆层的摩擦系数随着扫描速度的增大反而降低,随着激光功率的增大而增大。此现象说明适当的降低激光功率,增加扫描速度,可以提高熔覆层的耐磨性,功率过低或扫描速度过快可能导致熔覆层与基体未形成冶金结合。
Based on the nanoindenter, the variation regularity of mechanical properties of Ni-based alloy cladding layer under different laser parameters was studied. The influence of different laser parameters on the mechanical properties of the cladding layer was analyzed, and the optimum laser cladding parameters were explored. The results show that the hardness of the coating increases with the increase of laser scanning speed and decreases with the increase of laser power. The friction coefficient of nickel-based coating decreases with the increase of scanning speed. The laser power increases and increases. This phenomenon shows that proper reduction of laser power and increase of scanning speed can improve the abrasion resistance of cladding layer. If the power is too low or the scanning speed is too fast, the cladding layer may not form metallurgical bond with the substrate.