THE PROCESS OF MAGNESIUM ALLOYS POWDER PREPARATION BY GAS ATOMIZATION

Abstract

Model studies of the conditions for obtaining powders of magnesium alloys by gas atomization with high-pressure
argon have been carried out. It is shown that with an increase in the gas velocity from 100 to 400 m/s and the melt temperature
from 700 °С to 1000 °С, the processes of dispersion of powder particles are intensified. It was established that obtaining particles
smaller than 150 μm is achieved by atomization at a speed of the energy carrier of 400 m/s and a melt temperature of 1000 °C.
The resulting powder particles have an average size of less than 70 μm and a spherical shape. The formation of the reqular
particle morphology is due to a significantly longer cooling time than spheroidization. It was established that the formation of
small crystallized drops of the melt occurs on the surface of the particles due to the secondary destruction of the melt jet.