MASS-TRANSFER IN A MELT UNDER LASER-ARC INTERACTION CONDITIONS

An analytic form of the steady-state lines of flow is found for a melt inside a bath operating under laser-arc interaction conditions in the range of the laser radiation intensities 0,5-1 MW/cm2 when the electric-are discharge current is low (< 100 A) and the velocity of the combined laser-discharge source is also low (less-than-or-equal-to 1 cm/s). The results of analytic calculations are in agreement with the experimental data. An allowance for the nonsteady motion of the melt does not alter the lines of flow, although the existence of pulsations of the metal vapor recoil pressure is the decisive factor responsible for the excitation of such melt motion.