(中南大学 机电工程学院， 长沙 410083)
摘 要: 介绍了在铝铸轧工艺中用频率交替变化的电磁场抑制晶粒长大的方法，阐述了粘性流体与电磁波频率响应的关系，分析了电磁场频率与熔体波动对晶粒细化效果产生的影响。结果表明在d 650 mm×1 600 mm铸轧机系统中，电磁场的最佳频域范围为11～15 Hz。
关键字: 铝； 电磁铸轧； 频率响应； 频域
electromagnetically continuous cast-rolling process
（Department of Electromechanical Engineering, Central South University，
Changsha 410083， P.R.China）
Abstract:The method of controlling velocity of grain growth in aluminum electromagnetically continuous castrolling by inputting rotated electromagnetic field was introduced. The relationship between viscous fluid and frequency response was described. The effect of electromagnetic field frequency and melt fluctuation on grain refinement was analyzed. The best frequency band 11～15 Hz under normal condition (d 650 mm×1 600 mm roller) was obtained.
Key words: aluminum; electromagnetically continuous cast-rolling; frequency response; frequency domain
