ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Thermodynamic Consideration on the Oxide System Containing MnO and TiO2 as Deoxidization Products in Steels
Mitsuhiko OhtaNobuo SanoKazuki Morita
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2000 Volume 40 Issue Suppl Pages S87-S91

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Abstract

Thermodynamics of the MnO-SiO2-TiO2 and the MnO-Al2O3-TiO2 systems have been studied for optimizing the property of oxides in steel. Iso-activity curves of each component, which are necessary for the determination of the composition of steel equilibrated with such oxides, have been estimated in the wide range of liquid phases. Although in the study of the MnO-SiO2-TiO2 system, iso-activity curves of SiO2 and TiO2 were partially obtained due to the lack of integration limit on the saturated line of SiO2 and TiO2, integration limits of each component have been derived by ternary Gibbs-Duhem equation. This enabled the estimation of steel composition in equilibrium with a wide range of the oxide system. In addition, the behavior of sulfur in the MnO-SiO2-TiO2 and the MnO-Al2O3-TiO2 oxides in steels were simulated using the sulfide capacities of these systems in order to optimize processing conditions.

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© The Iron and Steel Institute of Japan
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