Experimental study on ablation of stainless steel with a new type of beam-coupled nanosecond laser

Stainless steel has the characteristics of high temperature resistance, corrosion resistance, oxidation resistance and good welding performance. This work was studied the static ablation experiment of a new type of beam-coupled nanosecond laser to explore the changes of the main parameters of the laser, such as frequency and power, on the ablation aperture, hole depth, ablation area roughness and ablation morphology of stainless steel. The low-frequency 1 kHz and highfrequency 10 kHz were used to irradiate stainless steel to conduct a comparative analysis of the same frequency and different single pulse energy, and a comparative analysis of the same power and different frequencies. The influence of laser energy density and repetition frequency on the morphology of the processed microstructures was investigated. The ablation morphology of stainless steel becomes more severe with the increase of single pulse energy, and the ablation pore depth and pore size increase with the increase of single pulse energy.