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Understanding the Behavior of Ti in Ultralow-C Liquid Steel

Interstitial-free (IF) steel is used for automotive outer panel applications. In order to ensure high deformability, extremely low C and N contents are required. Such low C and N contents are obtained during the RH process via vacuum degassing. Therefore, it becomes ultralow- C (ULC) steel. Additional capture of these interstitial elements is carried out by adding Ti into the liquid steel. Since Ti has an affinity to O, its addition follows Al deoxidation. During Al deoxidation, a considerable amount of alumina is generated, followed by decreasing soluble O content in the steel. The generated alumina is floated and removed to the RH slag by the circulation of the steel in the RH vessel.

Cite This Article: Youn-Bae Kang, Young-Joon Park, Dong-Hyun Kim, Joo-Hyeok Lee, "Understanding the Behavior of Ti in Ultralow-C Liquid Steel," AIST Transactions, Iron & Steel Technology, November 2023, Vol. 20, No. 11, pp. 140-147. DOI 10.33313/TR/1123.
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2023 AIST Transactions, November
PR-TN1123-1
Youn-Bae Kang, Young-Joon Park, Dong-Hyun Kim, Joo-Hyeok Lee
November 01, 2023
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