东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (5): 673-678.DOI: -

• 材料与冶金 • 上一篇    下一篇

方坯连铸凝固末端电磁搅拌工艺优化的数值模拟

苏旺，姜东滨，罗森，朱苗勇   

  1. (东北大学材料与冶金学院，辽宁沈阳110819)
  • 收稿日期:2012-10-26 修回日期:2012-10-26 出版日期:2013-05-15 发布日期:2013-07-09
  • 通讯作者: 苏旺
  • 作者简介:苏旺(1966-)，男，湖南湘潭人，东北大学博士研究生；朱苗勇(1965-)，男，辽宁沈阳人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(50925415)；中央高校基本科研业务费专项资金资助项目(100102001)；辽宁省博士启动基金资助项目(20121010)

Numerical Simulation for Optimization of FEMS in Billet Continuous Casting

SU Wang， JIANG Dongbin， LUO Sen， ZHU Miaoyong   

  1. School of Materials ＆ Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2012-10-26 Revised:2012-10-26 Online:2013-05-15 Published:2013-07-09
  • Contact: ZHU Miaoyong
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摘要： 利用ANSYS和CFX软件建立了描述160mm×160mm方坯连铸凝固末端电磁搅拌过程的数学模型.通过确立钢液黏度与温度的定量关系，考虑凝固时钢液黏度的重要影响，研究了方坯凝固末端糊状区磁场和流场的分布，以及电流强度对凝固前沿钢液最大搅拌速度的影响规律.结果表明:搅拌电流强度每增加100A，铸坯中心磁感应强度增加250×10-4T，切向电磁力增加1933N/m3，最大流速增加69cm/s.现场实验检验结果表明:60#钢凝固末端电磁搅拌器安装位置处液芯半径为344mm，最佳电磁搅拌频率为6Hz，最佳搅拌电流为380A，此时凝固前沿最大流速为165cm/s，铸坯中心碳偏析得到明显改善，中心碳偏析指数为104.

关键词: 方坯连铸, 末端电磁搅拌, 电磁场, 流场, 数值模拟

Abstract: An FEMS mathematical model was built for 160mm×160mm continuous casting billet by ANSYS and CFX software. With establishing viscosity of the molten steel as a function of temperature， and considering the important effect of molten steel while solidification， the distribution of electromagnetic field and flow field in the mushy zone of the billet and the influence law of maximum flow velocity at the solidification front under various stirring currents were investigated. The calculation results showed that with increasing 100A of the current intensity， the magnetic intensity， tangential electromagnetic force and flow velocity of molten steel increase 250×10-4T， 1933N/m3 and 69cm/s， respectively. The onsite tests showed that the proper liquid core radius at solidification end of billet for FEMS is 344mm， and the optimal frequency and current for FEMS are 6Hz and 380A， respectively. With these FEMS parameters， the maximum flow velocity of molten steel at the solidification front caused by electromagnetic force is 165cm/s and central carbon segregation index in billet is 104.

Key words: billet continuous casting, FEMS (final electromagnetic stirring), electromagnetic field, flow field, numerical simulation

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