Abstract

The phase boundaries in the Fe–Mg–Al–O, Fe–Ca–Al–O, Fe–Sr–Al–O, and Fe–Ba–Al–O systems at 1600°C are determined using the theory of construction of solubility surfaces of components in a metal. The equilibrium constants of the formation of alkaline-metal aluminates from the components of a metallic melt are estimated. The compositions of the nonmetallic inclusions formed upon melt deoxidation and equilibrated with liquid iron are determined. A complex mechanism of deoxidation with the formation of oxide compounds containing aluminum and alkaline-earth metal is found to take place in all systems at 0.01 wt % aluminum dissolved in a metallic melt and an alkaline-earth metal concentration of 0.001 wt %. The deoxidation ability curves of the alkaline-earth metals are constructed for a fixed aluminum concentration [Al] = 0.01 wt %.

中文翻译：

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铝存在下碱土金属脱氧能力的热力学分析

摘要

Fe–Mg–Al–O、Fe–Ca–Al–O、Fe–Sr–Al–O 和 Fe–Ba–Al–O 体系在 1600°C 的相界是使用构造理论确定的金属中组分的溶解度表面。估计从金属熔体的组分形成碱金属铝酸盐的平衡常数。测定了在熔融脱氧时形成并与铁水平衡的非金属夹杂物的成分。发现在金属熔体中溶解的铝含量为 0.01 wt% 且碱土金属浓度为 0.001 wt% 时，在所有系统中都会发生复杂的脱氧机理，即形成含有铝和碱土金属的氧化物。碱土金属的脱氧能力曲线是针对固定铝浓度 [Al] = 0.01 wt% 构建的。