电渣重熔06Cr18Ni11Ti奥氏体不锈钢铝钛烧损热力学分析

Thermodynamic analysis of aluminum-titanium burning loss for electroslag remelted 06Cr18Ni11Ti austenitic stainless steel

安涛 ¹王芳 ¹刘中秋 ²李宝宽 ²徐鹏飞 ²岳云辉³

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作者信息

1. 东北大学共生矿生态化冶金教育部重点实验室,辽宁沈阳 110819;东北大学冶金学院,辽宁沈阳 110819
2. 东北大学冶金学院,辽宁沈阳 110819
3. 沈阳东大三建工业炉制造有限公司,辽宁沈阳 110100
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摘要

为了研究06Cr18Ni11Ti奥氏体不锈钢电渣重熔过程中关键元素Al和Ti的热力学平衡,建立了基于分子离子共存理论(IMCT)的热力学模型,推导出针对该钢种的无TiO2四元渣系(Al2O3-CaO-MgO-CaF2)的IM-CT计算公式,并计算了渣系各组元以及钢中初始Al含量对Al、Ti平衡的影响.结果表明:过量的Al2O3会造成Ti元素的烧损;而过量的CaO则会造成Al元素的烧损;CaF2和MgO对Al、Ti平衡影响较小,可以利用其来调节渣系的黏度、熔点及比电阻等物性参数;冶炼温度升高会导致平衡Al含量增加,而平衡Ti含量降低;初始Al含量越高,平衡状态下的Al、Ti含量就越高.

Abstract

To study the thermodynamic equilibrium of the key elements Al and Ti of the 06Cr18Ni11Ti austenitic stainless steel during the electroslag remelting process,a thermodynamic model based on the ion and molecule coexistence theory(IMCT)was established.For the four-component slag(Al2O3-CaO-MgO-CaF2)with no TiO2,an IMCT formula was developed to calculate the effects of the components of the slag system and the initial Al content in the steel on the equilibrium of Al and Ti.The results indicate that excessive Al2O3 can cause the burning loss of Ti element,excessive CaO will lead to the burning loss of Al element.CaF2 and MgO in slag,which can be used to adjust the viscosity,melting point,and specific resistance of the slag system,have little impact on the equilibrium of Al and Ti.With the increase in temperature in slag,the content of Al at equilibrium time rises,while the content of Ti drops.When more initial Al content is in steel,the content of Al and Ti in equilibrium state is higher.

关键词

奥氏体不锈钢/电渣重熔/分子离子共存理论/铝钛平衡/热力学

Key words

austenitic stainless steel/electroslag remelting/ion and molecule coexistence theory/aluminum-titani-um equilibrium/thermodynamic analysis

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出版年

2024

钢铁研究学报

中国钢研科技集团有限公司

钢铁研究学报

CSTPCDCSCD北大核心

影响因子：0.997

ISSN：1001-0963

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