NUMERICAL ANALYSIS OF THE PROCESSES OF HEATING AND CONVECTIVE EVAPORATION OF METAL IN PULSE LASER TREATMENT

摘要

Mathematical model of the processes of heating, melting and evaporation of metal under the effect of a focused laser beam is suggested. The model allows describing thermal processes in the bulk of metal and gas-dynamic processes in a metal vapour flow occurring in laser treatment by using pulse lasers. Numerical analysis was conducted to study the processes of heating and convective evaporation of metal with a millisecond pulse of the Nd:YAG-laser beam affecting a low-carbon steel sample.