ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (2): 13-14.

• 试验研究 • 上一篇    下一篇

稀土元素在洁净重轨钢中存在状态的热力学模型研究

朱江波1,宋智芳1,方 磊2 ,刘承军2,姜茂发2   

  1. 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 ;
  • 收稿日期:2008-09-28 出版日期:2009-04-01 发布日期:2022-12-02
  • 作者简介:朱江波(1981-),男,硕士,工程师,东北大学毕业,从事产品质量管理。

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

Zhu Jiangbo1 , Song Zhifang1 , Fang Lei2 , Liu Chengjun2 , Jiang Maofa2   

  1. 1. Steelmaking Plant,Shougang Qian'an Iron and Steel Co,Qian'an 064404;
    2. School of Materials and Metallurgy,Northeastern University,Shenyang 110004;
  • Received:2008-09-28 Published:2009-04-01 Online:2022-12-02

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、Al2O3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。

关键词: 稀土元素, 洁净重轨钢, 热力学模型

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 Al2O3 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.

Key words: Rare Earth Elements, Clean Heavy Rail Steel, Thermodynamics Model