Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel
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 t...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001103 |
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| author | Yeongjin Jun Yongsug Chung Sungjin Park Suchang Kang Min-Kyu Paek Joo Hyun Park |
| author_facet | Yeongjin Jun Yongsug Chung Sungjin Park Suchang Kang Min-Kyu Paek Joo Hyun Park |
| author_sort | Yeongjin Jun |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-8edda6e9ba074409b06dc89f07ca6aaa |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-8edda6e9ba074409b06dc89f07ca6aaa2025-01-20T04:17:31ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013512501264Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steelYeongjin Jun0Yongsug Chung1Sungjin Park2Suchang Kang3Min-Kyu Paek4Joo Hyun Park5Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, South KoreaDepartment of Materials Science and Engineering, Tech University of Korea (TU Korea), Siheung, South KoreaSteelmaking Research Group, Technical Research Laboratories, POSCO, Pohang, South KoreaSteelmaking Research Group, Technical Research Laboratories, POSCO, Pohang, South KoreaDepartment of Chemical and Metallurgical Engineering, Aalto University, Espoo, FinlandDepartment of Materials Science and Chemical Engineering, Hanyang University, Ansan, South Korea; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S2238785425001103ReoxidationTundishStainless steelInclusionRice husk ashCalcium aluminate flux |
| spellingShingle | Yeongjin Jun Yongsug Chung Sungjin Park Suchang Kang Min-Kyu Paek Joo Hyun Park Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel Journal of Materials Research and Technology Reoxidation Tundish Stainless steel Inclusion Rice husk ash Calcium aluminate flux |
| title | Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel |
| title_full | Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel |
| title_fullStr | Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel |
| title_full_unstemmed | Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel |
| title_short | Influence of tundish flux on reoxidation behavior of Al-killed Ti-containing stainless steel |
| title_sort | influence of tundish flux on reoxidation behavior of al killed ti containing stainless steel |
| topic | Reoxidation Tundish Stainless steel Inclusion Rice husk ash Calcium aluminate flux |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001103 |
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