脉冲激光铣削的机制研究与应用

通过观察和分析研究高、低两种脉冲激光功率密度条件下激光铣削的硬质合金的表面形貌和其铣削实验过程，发现脉冲激光铣削的材料去除机制存在材料直接气化、材料溶化后其熔体喷射和材料表面块状剥落三种方式。这三种材料去除机制在脉冲激光铣削过程中一般是同时存在的，但在不同条件下其主次不同，在本实验条件下，较低脉冲激光功率密度激光铣削的硬质合金材料去除机制以材料熔化后熔体喷射为主，而在较高功率密度条件下硬质合金铣削表面上存在类似解理断裂一样的表面形貌，即激光铣削表面以块状剥落为主。最后简单介绍了一些脉冲激光铣削的应用。

Mechanism Research and Application of Pulse Laser Milling

Through the observation and analysis on the surface formation and the milling test of hard alloy under power-density conditions of high and low pulse lasers, it shows that there exist three modes of material removal mechanism milled by pulse laser, including immediate gasification, ejection after being melted, and ablation of material surface. In the process of pulse laser milling, these three modes coexist but plays a different role under different conditions. In the test, under the condition of a low power-density, the removal mechanism for hard alloy material is primarily ejection; under a high power-density condition, the milling surface of the hard alloy shows some fracture in formation, that is, the ablation as the main mode. In the last part, some applications of pulse laser milling are briefly introduced.