The study is about the process of laser marking by melting products made of carbon structural steel 15Cr2 with wide application in industry. A fibre laser operating in the near-infrared region was used to perform the experiments. A raster marking method was used by varying the power density of the laser radiation and the frequency of pulses repetition. For each marked area, the contrast is determined by measuring the saturation of the marked area and the background by the greyscale. Graphs of the dependence of the contrast on the power density for three marking speeds and on the contrast on the frequency for two marking speeds are analysed. The work intervals for the power density and frequency for this steel and fibre laser, are determined.

这项研究是关于通过熔化碳素结构钢15Cr2制成的产品进行激光打标的过程，在工业上得到广泛应用。使用在近红外区域工作的光纤激光器进行实验。通过改变激光辐射的功率密度和脉冲重复频率来使用光栅标记方法。对于每个标记区域，通过灰度测量标记区域和背景的饱和度来确定对比度。分析了三种标记速度下对比度对功率密度的依赖性以及两种标记速度下频率对对比度的依赖性。确定该钢和光纤激光器的功率密度和频率的工作间隔。