МАТЕМАТИЧНЕ МОДЕЛЮВАННЯ НЕСТАЦІОНАРНИХ ПРОЦЕСІВ СЕЛЕКТИВНОГО ЛАЗЕРНОГО ПЛАВЛЕННЯ МЕТАЛЕВИХ ПОРОШКІВ

Анотація

Mathematical modeling of non-stationary processes of selective laser melting of metal powders is considered. The general mathematical formulation of the problem of selective laser melting of metal powders is reduced to the formulation of separate structurally interconnected problems. Such as: the problem of non-stationary heat transfer taking into account phase transitions when heating metal powders with a moving laser beam; the problem of the dynamics of liquid metal in a molten bath; the task of determining the non-stationary shape of the free surface of the melt bath in the presence of recoil pressure. As a result of the carried out computer modeling, the distribution of the temperature field in the calculation area with the selection of the liquid zone was obtained. The dependences of the width and depth of the melt bath on the laser movement speed and the laser spot diameter are plotted.