钢液中镁合金复合脱氧热力学分析  

Thermodynamic analysis of complex deoxidization by magnesium-alloy in the liquid steel

作　　者：张同生[1] 王德永[1] 刘承军[1] 张永启[1] 姜茂发[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819

出　　处：《材料与冶金学报》2014年第2期79-84,91,共7页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(50904017);中央高校基本科研业务费项目(N120602005)和(N120502004)

摘　　要：镁具有净化钢液、细化钢中非金属夹杂物的作用.针对钢液镁处理技术的发展需求,本文采用一阶和二阶相互作用系数,基于吉布斯自由能最小原理计算得到了Mg-Al-O、Mg-Si-O、Mg-Ti-O、MgZr-O的热力学优势区域图,并探讨合金元素含量与脱氧平衡产物间的关系.通过热力学计算,揭示了钢液镁处理在不同脱氧制度下钢中脱氧产物的变化规律,可为镁处理在生产实践中的应用奠定理论基础.Magnesium has a role to clean the steel and to refine the inclusions. In order to meet development of magnesium -treat technology, in this paper, the phase stability diagrams ofMg -A1 - O~ Mg - Si - O, Mg - Ti - O, Mg - Zr - O were drawn through first - and second - order interaction parameters, based on principle of Gibbs free energy minimization. And the relationship between the element content and the deoxidation products was discussed simultaneously. Through thermodynamic calculation, an evolution regulation for the deoxidation products was revealed, under different magnesium - treat conditions. The authors hoped that our work may present a theoretical basis for the practice.

关 键 词：镁合金 复合脱氧 热力学 非金属夹杂物 

分 类 号：TF704.1[冶金工程—钢铁冶金]