Metall. Res. Technol.
Volume 114, Number 3, 2017
|Number of page(s)||8|
|Published online||30 May 2017|
Influence of Mg/Ti complex addition on evolution and thermodynamics of the inclusion in Al-killed steel
Key Laboratory of Ecological Utilization of Multi-Metallic Mineral of Education Ministry, Northeastern University,
110819, P.R. China
2 Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
3 College of Mechanical and Electrical Engineering, Yangtze Normal University, Chongqing 408000, P.R. China
⁎ e-mail: email@example.com
Received in final form: 14 March 2017
Accepted: 16 March 2017
To reveal the effects of magnesium and titanium on the behavior of inclusions in Al-killed steels, four types of experimental steel with different magnesium and titanium contents were prepared. Subsequently, the samples extracted from the steels were polished and analyzed by field emission scanning electron microscopy. The results show that titanium and magnesium can control efficiently the inclusions size and morphology. The number of Mg–Al–Ti–O inclusions in high-Mg and low-Ti steel was large, but their size was small. The Mg–Al–Ti–O inclusions were nearly spherical, unlike the Mg–Al–O spinel. According to the phase stability diagram, the MgO · Ti2O3 phase is not stable, unless the ratio of log[aMg] and log[aTi] of molten steel is lower than 0.654. As for the production practice, the addition amount of magnesium and titanium should be considered simultaneously to modify inclusions in molten steel.
Key words: inclusion / thermodynamic / Ti-bearing / deoxidation / magnesium
© EDP Sciences, 2017
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