Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Research and Technology-Jmr&t Pub Date : 2025-01-15 DOI:10.1016/j.jmrt.2025.01.110

Yeongjin Jun , Yongsug Chung , Sungjin Park , Suchang Kang , Min-Kyu Paek , Joo Hyun Park

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引用次数: 0

Abstract

The cleanliness of Ti-containing ferritic stainless steel (Ti-FSS) has been improved via vacuum-oxygen-decarburization (VOD) and ladle treatment (LT) processes. However, the reoxidation phenomena inevitably occur during melt transfer from ladle to continuous casting tundish, resulting in a loss of titanium yield in conjunction with the formation of reoxidative inclusions. Hence, the present work aims to systematically investigate the combinational effect of different tundish fluxes on the reoxidation behavior of Al-killed Ti-FSS melt. Rice husk ash (RHA) and MgO (M) insulation powders, and calcium aluminate, CaO–Al₂O₃ (CA) based flux were used for the experiments. When the molten steel was covered by M + CA fluxes, the average size of inclusions decreased. On the other hand, when the RHA + CA fluxes were added, the average size of inclusion decreased, whereas total number of inclusions significantly increased due to a reoxidation reaction by SiO₂ in RHA. When the M + RHA + CA combinative fluxes were added, the size of inclusion decreased, and the number of inclusions exhibited a value between the M + CA and RHA + CA conditions. Consequently, a decrease in total oxygen content in Ti-FSS was most effective in the M + CA flux combination.

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来源期刊

Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys

CiteScore

8.80

自引率

9.40%

发文量

1877

审稿时长

35 days

期刊介绍： The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.