|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||D-6: Evolution of Al-Ti-Mg-O Inclusions during Refining and Casting Process of Interstitial Free Steel
||Xiao Pengcheng, Xiaoyan Wu, Liguang Zhu, Qingjun Zhang, Yihua Han
|On-Site Speaker (Planned)
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 show that many of 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.