OPTIMIZATION OF STEEL PROCESSING PARAMETERS 12KH18N9T ROUND LASER BEAMS
Laser processing of 12Х18Н9Т steel was optimized using the MOGA genetic algorithm built into the DesignXplorer module of the ANSYS Workbench program. The temperature fields were calculated by finite element method taking into account the dependence of thermophysical properties of the material on the temperature in the ANSYS Workbench program. Using a face-centered version of the central compositional design of the experiment, a regression model of laser processing of 12Х18Н9Т steel was obtained. Power density of laser radiation, diameter of laser beam and duration of laser radiation pulses were used as variable factors. As responses, the maximum temperatures in the treatment zone and the depth of penetration of the material were used. The effect of the treatment parameters on the maximum values of the temperature and penetration depth of the material in the laser impact zone was evaluated. It was found that the maximum temperatures and depths of penetration of the material are most affected by the power density of laser radiation. Optimization of laser processing of steel was 12Х18Н9Т performed when setting maximum temperature limits in the treatment area for three variants of minimum penetration depth. Parameters obtained as a result of optimization and parameters obtained as a result of finite element modeling were compared. The maximum relative error of the results obtained using the MOGA algorithm did not exceed 8% in determining the maximum temperatures and 10% in determining the maximum penetration depths.