A Study on Thermodynamic Model for Rare Earth Element Existence in Clean Heavy Rail Steel

朱江波; 宋智芳; 方磊; 刘承军; 姜茂发

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A Study on Thermodynamic Model for Rare Earth Element Existence in Clean Heavy Rail Steel

更新时间：2026-01-21

- A Study on Thermodynamic Model for Rare Earth Element Existence in Clean Heavy Rail Steel
- Special Steel Vol. 30, Issue 2, Pages: 13-14(2009)
- 作者机构：
  
  1. 首钢迁安钢铁有限责任公司炼钢厂，迁安,064404
  2. 东北大学材料与冶金学院,沈阳,110004
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 September 2008，
  
  Online First：02 December 2022，
  
  Published：02 December 2009
- 稿件说明：
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朱江波, 宋智芳, 方磊, et al. A Study on Thermodynamic Model for Rare Earth Element Existence in Clean Heavy Rail Steel[J]. Special Steel, 2009, 30(2): 13-14.
DOI：

朱江波, 宋智芳, 方磊, et al. A Study on Thermodynamic Model for Rare Earth Element Existence in Clean Heavy Rail Steel[J]. Special Steel, 2009, 30(2): 13-14. DOI：

摘要

建立了可以定量描述洁净稀土重轨钢凝固过程中成分偏析与夹杂物析出的耦合热力学模型

经文献验证

模型具有较高精度。通过模型分析了稀土加入量对洁净钢中夹杂物的析出规律与稀土存在状态的影响。得出在洁净重轨钢中加入稀土可以变质钢中MnS、Al

夹杂;钢中首先析出稀土氧硫化物(或稀土铝酸盐)

其次是稀土硫化物

最后是稀土氮化物;在同一稀土加入量条件下

固溶La的量要大于固溶Ce的量。

Abstract

A coupling thermodynamic model to quantitatively describe elements segregation and inclusions precipitation during solidifcation process of clean RE heavy rail steel has been established

and according to the analysis on literature data

the model has higher precision.The effect of RE adding amount on law of precipitation of inclusions and RE elements existence state in clean steel has been analyzed by the model. It is obtained that the MnS and Al

inclusions in steel can be modifed by adding RE elements in clean heavy rail steel; the RE oxysulfide(or RE aluminate)first precipitates in steel

then RE sulfide and last RE nitride; and with adding same RE elements amount

the lanthanum solute content is larger than the cerium solute content.

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