Abstract
The evolution mechanisms of Al2O3-SiO2 system inclusion in 13Cr stainless steel with CaO-SiO2-Al2O3 top slag were investigated from thermodynamic ,kinetic as well as experimental work.
From theoretical aspect: the stability diagrams of Ca-Si-Al-O and Mg-Al-O were obtained, From experimentally aspect: Increasing Al2O3 content in slag would low slag melting temperature and the usage of CaF2. On the condition of relatively high Al2O3 in slag, the top slag would have a good kinetic condition. But excessive high Al2O3 in slag would increase total oxygen in stainless steel and cause a more complex series of slag-steel-inclusions reactions. Meanwhile, it is found that high basicity slag has good de-oxidation ability and it also accelerates the transition from high Al2O3 inclusions to low melt point CaO-Al2O3-SiO2-MgO system inclusions. But excessive high basicity would have no effect on T.O and leads high content of [Al], [Mg] in liquid iron and which would promote the MgO-Al2O3 inclusions.
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Wang, Q., Wang, L., Chou, K. (2016). Effect of Al2O3 Content in Top Slag on Cleanness of Stainless Steel Fe-13Cr. In: Reddy, R.G., Chaubal, P., Pistorius, P.C., Pal, U. (eds) Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48769-4_16
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DOI: https://doi.org/10.1007/978-3-319-48769-4_16
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