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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 18b
SUMMARY:Inclusion formation and reoxidation behavior of si-killed austenitic stainless steel under ladle refining and tundish conditions
DESCRIPTION:The effect of slag composition on the refining and reoxidation behavior of Si-killed 316L stainless steel during ladle and tundish processes were investigated in an induction furnace equipped with a MgO crucible under high purity Ar atmosphere at 1873 K and 1773 K, respectively. For the ladle refining process, the total oxygen (T.O.) content decreased with increasing the Vee ratio (CaO/SiO2=C/S, 1.0, 1.3, 1.7, and 2.3) of the CaO-SiO2-Al2O3-MgO-CaF2 ladle refining slag, but the effect of CaF2 content (15, 20, 25, and 30 %) on the T.O. can be neglected at high C/S condition. The CaO-SiO2-Al2O3-MgO system liquid inclusions can be found as the C/S < 1.3, while the formation of spinel and MgO inclusions were observed at the C/S > 1.7 for a fixed CaF2 content (10 %). For the tundish metallurgy process, the liquid and SiO2-rich Mn-Si-O system inclusions were found as the liquid steel reacted with rice husk ash (RHA) and RHA-CaO-SiO2. The liquid Mn-Si-Al-O system inclusions were observed as reacted with RHA-CaO-Al2O3 flux. The number density of inclusions increased, decreased, and remained constant with the reaction time when the liquid steel reacted with RHA, RHA-CaO-Al2O3, and RHA-CaO-SiO2 fluxes, respectively. The results indicated that the reoxidation of the liquid steel is aggravated as the RHA was used, whereas the RHA-CaO-Al2O3 can facilitate the removal of the inclusions during the tundish metallurgy process.
CLASS:PUBLIC
DTSTART:20230614T151000
DTEND:20230614T153000
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