Calculation of thermal processes during laser treatment of dual phase steel using computer-generated diffractive optical element

Experimental studies of the shaping of CO
₂
laser beam by a reflective diffractive optical element have been performed. A formula that describes the distribution of power density in the form of an equation for a rectangular-shape heat source was obtained. Calculation of thermal processes under laser irradiation was made, taking into account changes in the absorption coefficient of the surface of the processed material using the "Sergey Korolev" computer cluster. To determine the temperature fields that occur during laser treatment of the DP 1000 dual phase steel, the CFX version 15.0 computational gas dynamics program was used. It was revealed that for the selected processing mode and the integrated value of coating absorption of 0.5, the maximum temperature on the front surface exceeds the liquidus temperature for the processed sheet material, and on the back side it is in the range of white heat.