不同电流模式下电渣重熔的电磁特性  

Electromagnetic characteristics of electroslag remelting process with different current models

作　　者：李兴达 赵岩 张红伟[1,2] 何江一 韩信 雷洪 Li Xinga;Zhao Yan;Zhang Hongwei;He Jangyi;Han Xin;Lei Hong(Northeastern University,Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Shenyang 110819,China;Northeastern University,School of Metallurgy,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,沈阳110819 [2]东北大学冶金学院,沈阳110819

出　　处：《材料与冶金学报》2025年第2期138-145,共8页Journal of Materials and Metallurgy

基　　金：国家自然科学基金与宝钢联合资助项目(U1460108)。

摘　　要：为了深入探究导电结晶器电渣重熔和传统电渣重熔的电磁特性,求解了简化的Maxwell方程,并分析了交流电流和直流电流下两种电渣重熔装置内磁场、电流密度、电磁力和焦耳热的分布.结果表明:两种电渣重熔装置的磁场、电流密度、电磁力和焦耳热均呈轴对称分布;随着电流频率的增加,趋肤效应变得更为明显,电极和金属熔池处的焦耳热比渣池处的焦耳热高3个数量级;两种装置下的电极/渣池界面、渣池/金属熔池界面均为等电势面,渣池的等效电阻比电极与金属熔池的等效电阻低3个数量级;当电流频率为100 Hz时,传统电渣重熔电磁力和焦耳热的最大值分别为1220N/m^(3)和7.15×10^(7) W/m^(3),导电结晶器电渣重熔电磁力和焦耳热的最大值分别为586 N/m^(3)和7.54×10^(7) W/m^(3).In order to have a deep insight into the electromagnetic condition of traditional electroslag remelting(ESR)and electroslag remelting with conductive mold,the simplified Maxwell equations were solved.The spatial distribution of magnetic field,current density,electromagnetic force,and Joule heat were analyzed in the case of alternative current and direct current.The results show that there are axisymmetric distributions for magnetic field,current density,electromagnetic force,and Joule heat in traditional ESR and ESR with conductive mold.The greater the current frequency,the more obvious the skin effect.Joule heat in the electrode and the molten steel pool is three orders less than that in the slag pool.The interfaces of electrode/slag pool and slag pool/molten steel pool are the equipotential surface in both cases of traditional ESR and ESR with conductive mold,and the equivalent resistance of slag pool is three orders greater than that of conductor and molten steel pool.When the case of current frequency is 100 Hz,the maximums of electromagnetic force and Joule heat are 1220 N/m^(3) and 7.15×10^(7) W/m^(3) for traditional ESR,and 586 N/m^(3) and 7.54×10^(7) W/m^(3) for ESR with conductive mold,respectively.

关 键 词：电渣重熔 导电结晶器 电磁场 焦耳热 等效电路 

分 类 号：TF774[冶金工程—钢铁冶金]