Laser micro polishing (LμP) is a new laser-based material processing method that has a high potential to overcome common disadvantages of traditional polishing techniques. A special challenge in LμP is the processing of large areas since processing in a process gas atmosphere is deemed necessary to avoid undesired oxidation and minimize surface roughness. Therefore, a new process strategy for LμP on stainless steel AISI 410 was investigated in which a gas nozzle was used to create a local process gas shielding and therefore to significantly increase the field of maximal processing. Using a Nd:YAG high power Q-switch laser, we demonstrated that local process gas shielding is feasible for LμP in terms of avoidance of surface defects and achieved micro-roughness. In addition, a wide process window in terms of nozzle distances and gas flow exists for LμP. The resulting surfaces are highly reproducible in terms of surface roughness. Besides Argon, Nitrogen is another process gas that is highly suitable for LμP of AISI 410. The use of Nitrogen might therefore significantly lower future production costs in LμP. Finally, spatially resolved LμP was explicitly demonstrated on a textured press plate.

激光微抛光（LμP）是一种新的基于激光的材料加工方法，具有克服传统抛光技术常见缺点的巨大潜力。LμP的一个特殊挑战是大面积加工，因为在加工气体气氛中进行加工被认为是避免不希望的氧化并使表面粗糙度最小化的必要条件。因此，研究了一种在不锈钢AISI 410上对LμP进行加工的新工艺策略，其中使用了一个喷嘴来形成局部工艺气体保护层，从而显着增加了最大工艺范围。使用Nd：YAG高功率Q开关激光器，我们证明了在避免表面缺陷和实现微粗糙度方面，局部工艺气体屏蔽对于LμP是可行的。此外，对于LμP，在喷嘴距离和气体流量方面存在较大的处理窗口。所得表面在表面粗糙度方面是高度可再现的。除氩气外，氮气是另一种非常适合AISI 410LμP的工艺气体。因此，使用氮气可能会大大降低LμP的未来生产成本。最终，在带纹理的压板上明确展示了空间分辨的LμP。