Abstract
Behaviors and evolutions of MgO·Al2Q3 in non-oriented silicon steel during calcium treatment were investigated by thermodynamic calculations and high-temperature experiments. MgO·Al2O3 inclusions were the main type of inclusions before calcium treatment, which is also confirmed by the stability diagram of MgO/MgO Al2O3/Al2Q3 from thermodynamic calculations. After calcium treatment, the majority of original MgO·Al2Q3 inclusions were mainly modified to CaO-MgO-Al2Q3 system inclusions, this would be beneficial to improve castability and product quality of silicon steel. But there was no modification happening to some MgO·Al2Q3 spinels which were directly surrounded by CaS inclusions. The content of Al2O3 occasionally existed a sudden increase besides a common decrease in the product layer of CaO·MgO Al2O3. Then the evolution mechanisms of MgO·Al2O3 inclusions were proposed in present work. Thus, Al/Mg atom ratio had a significant influence on the modification of MgO·Al2O3 spinel.
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Zhao, Y., Sun, Yh. (2016). Behaviors and Evolutions of MgO·Al2O 3 in Non-Oriented Silicon Steel During Calcium Treatment. In: Allanore, A., Bartlett, L., Wang, C., Zhang, L., Lee, J. (eds) EPD Congress 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48111-1_8
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DOI: https://doi.org/10.1007/978-3-319-48111-1_8
Publisher Name: Springer, Cham
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