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2018 | OriginalPaper | Chapter

Evolution of Al-Ti-Mg-O Inclusions During Refining and Casting Process of Interstitial Free Steel

Authors : Pengcheng Xiao, Xiaoyan Wu, Qingjun Zhang, Yihua Han, Liguang Zhu

Published in: 9th International Symposium on High-Temperature Metallurgical Processing

Publisher: Springer International Publishing

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Abstract

The evolution of chemical composition, size, proportion, and morphology of the Al-Ti-Mg-O inclusions during the steelmaking process of Interstitial Free (IF) steel from the RH to the Continuous Casting (CC) slab were investigated by means of Auto-SEM. Results showed that many of Al2O3 and MgO-Al2O3 type inclusions are modified by TiOx, while most of their shapes are irregular due to the high melting temperature. The composition evolutions and melting characteristics of Al-Ti-Mg-O inclusions under different contents of [Al], [Ti] and [Mg] were estimated by using thermodynamic software Factsage 7.0. Resulted showed that estimated results are in good agreement with the analysis results of industrial samples. Both the Ti alloying and spontaneous enrichment would make a high Ti concentration environment that was in favor of the TiOx existence. Moreover, more TiOx component can modify MgO-Al2O3 spine inclusion into inclusions with a lower melting temperature.

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Metadata
Title
Evolution of Al-Ti-Mg-O Inclusions During Refining and Casting Process of Interstitial Free Steel
Authors
Pengcheng Xiao
Xiaoyan Wu
Qingjun Zhang
Yihua Han
Liguang Zhu
Copyright Year
2018
Book
9th International Symposium on High-Temperature Metallurgical Processing

Print ISBN: 978-3-319-72137-8

Electronic ISBN: 978-3-319-72138-5

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-72138-5_51

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