CALCULATION OF LASER TRANSFORMATION HARDENING WITH A CIRCLE BEAM

摘要

Considering the circle beam with even distribution of power density, an analytical model of single-pass laser transformation hardening is presented based on Green function. With the model, temperature profiles of the laser-heat affected zones of the samples are calculated to provide information about the depths of hardened zones. In order to verify the validity of the model, experiments are carried out. In the experiments, a 1.5-kW continuous CO_2 laser unit and ductile cast iron QT600-3 samples are used. The hardness distribution of the treated area of the sample is examined. There is a good agreement between the theoretical predictions and the experimental results.