RESEARCH OF INJECTION METHODS FOR Y2O3 NANOPARTICLES INTO NICKEL- FREE STAINLESS STEEL DURING INDUCTION VACUUM REMELTING

Investigation of the possibility of obtaining an oxide-dispersed strengthening steel alloy based on 5 different ways of fine-dispersed strengthening particles Y2O3 injection into the liquid phase of steel Fe-13Cr (wt. %) in a vacuum. For this purpose, were conducted 5 series of experiments with different conditions and regimes. 2 series of 5 melts were carried out to evaluate the possibility of mechanical injection of yttrium oxide in the melt with different entry conditions. 3 series of 5 melts were conducted to evaluate the possibility of oxidation of metallic yttrium in the melt with the formation of yttrium oxide particles. Either melt residence or residual pressure in the furnace chamber was varied in different series. The results of ingot analysis on XRF, ICP-AES, and EDS showed that significant amounts of yttrium oxide were not injected. The method with oxidation of metallic yttrium in the melt from the reduction ofspecially added iron oxide with a concentration of 0.0552 ppm showed the best result.