电磁连铸系统磁场的数值模拟及试验研究  

Numerical Simulation of Magnetic Field in Electromagnetic Continuous Casting and Its Experiment

作　　者：张兴国[1] 曲若家[1] 何文庆[1] 贾非[1] 金俊泽[1] 

机构地区：[1]大连理工大学

出　　处：《特种铸造及有色合金》2004年第6期34-36,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金重点资助项目 (50 2 340 2 0 ) ;国家自然科学基金资助项目 (597750 53);辽宁省自然科学基金资助项目 (962 1 1 0 )

摘　　要：以电磁场理论为依据 ,建立了电磁连铸成型系统的物理和数学模型 ,用小线圈法实测了不同电源功率时系统内的磁场强度 ,得出了结晶器内磁场的分布规律 ;并且进行了铝合金电磁连铸的成型试验 ,研究了工艺参数对铸锭表面质量的影响 ;用有限元法数值模拟了感应线圈位置以及感应线圈与结晶器间距对成型系统内磁感应强度和分布的影响。结果表明 :磁感应强度的最大值位于感应线圈的中心位置 ;感应线圈与结晶器间的距离增大 ,磁感应强度明显减小 ,5～ 10mm的间距对电磁连铸过程较为有利。研究结果表明合理设计电磁连铸系统有利于得到分布合理的磁场 ,提高电源效率 ,确定合理的工艺参数可以保证电磁连铸的顺利进行并有利于改善铸坯的内外部质量。Based on the theory of electromagnetic field, a physical and mathematical model for electromagnetic continuous casting has been established. The distribution of electromagnetic field in crystallyzer was obtained by measuring magnetic flux density under different powers with small coil method. The effect of processing variables on ingot surface quality was investigated. The forming experiment of Al alloy in electromagnetic continuous casting was conducted. The influence of inductor position and distance between inductor and crystallyzer on magnetic flux density and distribution in the system were simulated by finite element method. It was found that the maximum value of magnetic flux density was located in the center of the inductor and the magnetic flux density was reduced obviously with distance increase between inductor and crystallyzer. The distance of 5～10 mm was favorable to electromagnetic continuous process. It was showed that proper design of the electromagnetic continuous casting system would be favorable to realize well distributed magnetic field and to improve power efficiency. Determining appropriate technological parameters can ensure the electromagnetic continuous casting sucessfully and can be helpful to improve the quality of the ingot.

关 键 词：连续铸造 电磁连铸 磁场 

分 类 号：TG249.7[金属学及工艺—铸造]