Influence of temperature and time factor on process of spraying of metallic powders in a plasma atomizer

Peter the Great St. Petersburg Polytechnic University, National Technology Initiative Center for Advanced Manufacturing Technologies, 194064 Saint-Petersburg, Russia

^* Corresponding author: author@email.org

Abstract

The development of additive technologies is hampered by the almost complete absence of domestic systems for the production of metal powders. A prototype installation of a plasma atomizer was developed and manufactured, which makes it possible to obtain low-tonnage batches of metal powders of various chemical compositions. However, when the technology was transferred from the laboratory to production, a number of additional issues arose associated with a decrease in the quality of commercial products as the time of continuous spraying increases. It was found that the reason for this is the formation of powder deposits on the walls of the spray chamber and the increase in its temperature. Using the method of mathematical modelling, the maximum permissible temperature of the walls of the spraying chamber was determined, ways of stabilizing the quality of the powder during industrial production were shown.