Effect of laser radiation parameters on surface modification of critical engineering part

Abstract

In this work, computational experiments were carried out using the MatLab Laser ToolBox package to determine the power range of a radiation source for realizing nanomodification of the C45 grade steel surface without melting. The dependences of the sample maximum temperature are determined depending on the power of the laser radiation source, beam diameter, and scanning speed. It has been found that for a steel plate, a power of more than 3.7 kW in the case of a slowly moving source (10 mm/s) and more than 4.9 kW in the case of a fast-moving source (20 mm/s) are required for melting. Moreover, an increase in power of a slow source by 0.2-0.3 W is accompanied by an increase in the maximum temperature by 200 K at the beginning and will increase towards the end of the heating process, which goes into melting stage.