东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (4): 533-536.DOI: -

• 论著 • 上一篇    下一篇

双级串联电渣重熔系统电磁场和焦耳热场研究

王芳;李宝宽;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金重点资助项目(50934008)

Electromagnetic field and Joule heating of an electroslag remelting process with two series-connected electrodes

Wang, Fang (1); Li, Bao-Kuan (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, F.
  • About author:-
  • Supported by:
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摘要： 以双级串联电渣重熔工艺中电极、渣池和钢锭为研究对象,建立了三维谐波电磁场数学模型,分析了其磁场、电磁力、电流密度和焦耳热功率密度分布.结果表明:对于双电极电渣重熔系统,临近效应占据主导,这和单电极电渣重熔系统集肤效应占主导完全不同.电流密度主要集中在渣内上半部分及两对电极的内侧,并且只有总电流的1/5~1/4流经钢锭;焦耳热的最大值出现在渣中及电极底部内侧.参数研究还发现:当频率大于等于35 Hz时,在电极内部电流密度趋向线性分布;当电极侵入深度增大或渣层的厚度减小时,渣池中焦耳热的最大值增大.

关键词: 双级串联, 电渣重熔, 电磁场, 焦耳热, 数值模拟

Abstract: A 3D finite element model was developed to analyze magnetic field, electromagnetic force, current density, and the Joule heating field for electrodes, slag, and ingots in an electroslag remelting process with two series-connected electrodes. The proximity effect dominated in the two-electrode ESR system, while the skin effect was important in the single electrode system. Maximum current distribution occurred on the interior of two series-connected electrodes in the slag and 20 to 25% of total current went through the ingot. Maximum Joule heating was at the bottom interior of the slag electrode. Investigating the various parameters indicated that if current frequency exceeded 35 Hz, current density in the inner electrode tended towards a linear distribution. Maximum Joule heating in the slag increased with increasing electrode immersion depth and decreasing of slag cap thickness.

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