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首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >Investigation on the Laser Surface Treatment of Steel and Aluminum with a Single-Mode Pulsed Fiber Laser Source
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Investigation on the Laser Surface Treatment of Steel and Aluminum with a Single-Mode Pulsed Fiber Laser Source

机译：用单模脉冲光纤激光源研究钢和铝激光表面处理的研究

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The effects of modifying the microstructure of a surface on its macroscopic properties have been studied intensively in the last decade, a well-known example being the generation of superhydrophobic surfaces with laser beams. For such kind of surface treatment, where the surface roughness (R_a value) is typically either increased or decreased, pulsed fiber lasers are an excellent tool. By focusing energy into a small spot on the surface, local intensity greater than the ablation threshold of the material can be reached and a portion of it is removed from the surface. Controlling the size and spacing of each of these holes or trenches allows to precisely modify the roughness (R_a value). For this study, we used a single-mode pulsed fiber laser with 100 ns pulse duration and up to 1 mJ pulse energy combined with a high-speed galvanometer scanner. Several parameters of the process were optimized in order to determine the induced roughness rate (cm~2/s for different R_a values) achievable at full power on steel and aluminum.
机译：在过去的十年中，已经在过去的十年中强烈地研究了改变表面的微观结构对其宏观性质的影响，是具有激光束的超疏水表面产生的众所周知的示例。对于这种表面处理，在表面粗糙度（R_A值）通常增加或减小的情况下，脉冲光纤激光器是优异的工具。通过将能量聚焦到表面上的小点，可以达到大于材料的消融阈值的局部强度，并且将其一部分从表面移除。控制每个孔或沟槽中的每一个的尺寸和间隔允许精确地修改粗糙度（R_A值）。对于这项研究，我们使用了一个具有100ns脉冲持续时间的单模脉冲光纤激光器，最多1 MJ脉冲能量与高速电压计扫描仪相结合。优化了该方法的几个参数，以确定在钢和铝的全功率下可实现的诱导粗糙度（用于不同R_A值的CM〜2 / s）。

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