取向硅钢连铸过程的凝固偏析模型计算

刘磊; 乔家龙; 郭飞虎; 项利; 仇圣桃

doi:10.7513/j.issn.1004-7638.2019.02.020

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取向硅钢连铸过程的凝固偏析模型计算

doi: 10.7513/j.issn.1004-7638.2019.02.020

1. 钢铁研究总院连铸技术国家工程研究中心, 北京 100081;
2. 安徽工业大学冶金工程学院, 安徽马鞍山 243032

基金项目:

国家重点研发计划（2016YFB0300305）。

详细信息

作者简介:
刘磊(1988-),男,博士研究生,河北衡水人,主要从事电工钢的研究,E-mail:liuleicn@live.com。

中图分类号: TF777.1
计量
- 文章访问数: 175
- HTML全文浏览量: 32
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2019-01-03
- 网络出版日期: 2023-12-02

Mathematical Model of Microsegregation of Grain-oriented Silicon Steel during Solidification of Continuous Casting

1. Engineering and Research Center for Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China;
2. College of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243032, Anhui, China

摘要

摘要: 以Clyne-Kurz方程为基础建立了取向硅钢连铸过程的微观偏析模型，研究了取向硅钢连铸凝固过程中溶质元素在液相中的偏析规律。通过比较连铸凝固过程中锰和硫实际活度积和平衡活度积的关系，确定了MnS的析出条件。结果表明：二次枝晶间距随着冷却速率的增加而减小，柱状晶区域二次枝晶间距为191.3μm，元素的分配系数越小，其偏析程度越大，并且溶质偏析程度随着固相率的增加而增大，当凝固分数达到0.997时，MnS开始析出。
- 取向硅钢 /
- 连铸 /
- 凝固 /
- 偏析 /
- 析出
Abstract: Based on CLYNE-Kurz model,segregation model of grain-oriented silicon steel during solidification of continuous casting was established,segregation of Mn and S elements in liquid phase during solidification of continuous casting was calculated,and the relationship between actual concentration product and equilibrium concentration product of Mn and S during solidification of continuous casting was compared.The results show that the secondary dendrite spacing decreases with the increase of cooling rate.The secondary dendrite spacing in columnar region is 191.3 μm.The degree of segregation increases with the decrease of the distribution coefficient of elements.The degree of solute segregation increases with the increase of solid fraction.When the solidification fraction reaches 0.997,MnS begins to precipitate.
- grain-oriented silicon steel /
- continuous casting /
- solidification /
- segregation /
- precipitation