Thermodynamics of Oxygen and Nitrogen in Liquid Fe-20mass%Cr Alloy Equilibrated with Titania-based Slags

Abstract

Equilibrium between CaO-Al2O3-TiOx or BaO-AI2O3-TiOx slags and a liquid Fe-20mass%Cr alloy with respect to oxygen and nitrogen was studied at 1 873 K as a function of Ti (or Al) content in alloys, using an Al2O3 crucible. The AI-O and Ti-AI relations in liquid alloy were studied, and nitride capacity defined by [formula omitted] was obtained from nitrogen distribution ratios, coupled with the analyzed oxygen content in liquid alloy or the PO2 determined by Ti/TiO2 equilibrium. Based on these results, activity of Al2O3 and activity coefficients of TiO2, TiO1.5 and CrO1.5 were evaluated. © 1994, The Iron and Steel Institute of Japan. All rights reserved.