Using simultaneous assistance of the water-based ultrasonic vibrations and a side-loaded magnetic field, the transient real-time observation and metallurgical examination were carried out for laser percussion drilling in stainless steel sheets, aiming for demonstrating the effect of the magnetic-ultrasonic assistance on the hole-drilling process and the metallurgical alteration characteristics. The effect of the camera shooting distance on the signal detection below the hole exit was discussed for laser drilling of through holes. The laser drilling efficiency was characterized based on the real-time observation. It was found that the camera shooting distance affected the signal observation below the hole exit after a workpiece was drilled through due to an optical shield effect of its border side. The influence of the magnetic-ultrasonic assistance was much more notable when the dominant or sufficient heat input for drilling through a hole could not be provided by using a smaller pulse energy, a smaller pulse duration or a bigger laser fluence. The average recast layer thickness of the through-hole middle generated using a millisecond laser could be less than around $5\mathrm{\mu }\mathrm{m}$ when using the water-based ultrasonic assistance accompanied with the magnetic assistance. Compared to the corresponding case without external assistance, a reduction of $40\mathrm{\mu }\mathrm{s}$ was achieved for drilling through a hole by using the simultaneous magnetic-ultrasonic assistance. The average grain size number became bigger for validating the grain refinement in the heat affected zone after laser drilling using the water-based ultrasonic vibrations with and without magnetic assistance.

利用水基超声振动和侧向磁场的同时辅助，对不锈钢薄板中的激光冲击钻进行了瞬态实时观察和冶金检查，目的是证明电磁超声辅助的效果。钻孔过程和冶金蚀变特征。对于通孔的激光打孔，讨论了相机拍摄距离对孔出口下方信号检测的影响。基于实时观察来表征激光钻孔效率。结果发现，由于工件边缘的光学屏蔽作用，在钻通工件后，摄像机的拍摄距离会影响孔出口下方的信号观察。当通过使用较小的脉冲能量，较小的脉冲持续时间或较大的激光通量无法提供用于钻通孔的主要或足够的热量输入时，电磁超声辅助的影响会更为明显。使用毫秒激光产生的通孔中间部分的平均重铸层厚度可能小于$5\mathrm{\mu }\mathrm{米}$与磁性辅助一起使用水基超声辅助时。与没有外部援助的相应案件相比，减少了$40\mathrm{\mu }\mathrm{s}$通过同时使用电磁超声波辅助工具在一个孔中钻孔，获得了成功。在使用和不使用磁辅助的情况下，使用水基超声振动进行激光钻孔后，平均晶粒尺寸数变得更大，以验证热影响区的晶粒细化。