Laser surface hardening of steel parts

The hardness of steel parts after laser treatment depends on a number of factors. In this paper, attention is focused on the surface heating temperature. The aim of the study is to make a reasonable choice of heating temperature. The results of physical modeling are presented. It is established that the temperature of the phase transformation decreases by 150 … 200 K. This is due to thermal stresses. The kinetics and mechanism of transformation during laser processing affect the formation of the structure. Heating to a temperature 200.250 K below the melting point leads to an increase in hardness by 10-15 HRC units.