Reassessment of Oxide Stability Diagram in the Fe–Al–Ti–O System
Reassessment of Oxide Stability Diagram in the Fe–Al–Ti–O System
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DOI：
10.2355/isijinternational.isijint-2017-182
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发表时间：
2017-09
影响因子：
1.8
通讯作者：
Youn‐Bae Kang;Joo-Hyeok Lee
中科院分区：
文献类型：
--
作者：
Youn‐Bae Kang;Joo-Hyeok Lee
本文简要地评述了Fe-Al-Ti-O系的相平衡，特别是氧化物相在稀浓度下与液态铁合金相平衡时的稳定性。该系统与钛合金化超低碳钢（Ti-ULC）相关，在连续铸造期间经常导致浸入式水口（SEN）堵塞。为了预测Ti-ULC钢中的稳定氧化物，采用CALPHAD方法进行热力学计算。以前可用的热力学计算进行了检查，并与现有的实验数据进行了比较。对以往研究的热力学模型进行了轻微的修改，结果表明，通过热力学计算预测稳定相的能力得到了显著的提高。从钛合金超低碳铸铁水口堵塞的角度讨论了热力学模型修正的意义。
Phase equilibria of Fe–Al–Ti–O system is shortly reviewed, in particular for stability of oxide phases in equilibrium with liquid Fe alloy in dilute concentration. This system is relevant to Ultra Low Carbon steel with Ti alloying (Ti-ULC), often causing clogging of Submerged Entry Nozzle (SEN) during continuous casting. In order to predict stable oxides in the Ti-ULC steel, thermodynamic calculation using CALPHAD approach was employed. Previously available thermodynamic calculations were examined, and compared with available experimental data. A slight modification of thermodynamic modeling of previous investigation resulted in noticeable improvement for the prediction of stable phases by thermodynamic calculation. Significance of the present revision of the thermodynamic modeling is discussed in the view of nozzle clogging of Ti-ULC casting.