电磁铸轧铸嘴区电磁场分布规律及其作用分析  

Experimental research on the electro-magnetic field distributing regularity of placing nozzle area in electro-magnetic cast-rolling process

作　　者：刘年春[1] 毛大恒[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《轻合金加工技术》2007年第12期15-19,51,共6页Light Alloy Fabrication Technology

基　　金：国家"863"计划项目(2001AA337070)

摘　　要：研究了电磁铸轧铸嘴区电磁场分布形态,由此探讨了其分布规律及对金属产生的力的作用。结果表明:在特定范围内电流强度及频率的变化能显著影响到磁场强度的大小,电流强度为20 A左右时,电磁场出现磁饱和,增大电流强度,电磁力增值很小。电流值给定时,低频电流能产生更高的磁场强度。铝合金薄板受力随输入电流强度增加近似呈抛物线规律升高。磁场强度分布在XOY水平面内有着明显的对称性,以铁芯为中心点向两边逐渐衰减,由于感应器的边端效应,中心区域磁场强度要大于边部区域的。电磁场作用下铸轧带坯凝固成形组织得到显著改善。The distribution of electro-magnetic field in placing nozzle area was studied, then the distributing regularity of electromagnetic field and electro-magnetic force was discussed. The results showed that in specifically range the variety of electric current intensity and frequency remarkably affect the magnitude of magnetic field intensity. When the electric current intensity value reaches 20 A, the elector-magnetic field appears magnetic saturation. To continue accrete the electric cmTent intensity, the electro-magnetic force almost do not increase. Under the set electric current intensity value, the lower frequency ok electric current can get higher magnetic field intensity. The received electro-magnetic force of aluminium alloy thin board augments approximately like parabola with the electrical current intensity increasing. The distribution of magnetic field intensity has distinct symmetrical character in XOY horizontal. The magnetic field intensity existed in centre, area is higher than in verge area because of the edge effect. The solidification structure of the cast-rolling strip was improved remarkably with the electro-magnetic fiehl acting on.

关 键 词：电磁铸轧 磁场强度 电磁力 分布规律 对称性 边端效应 

分 类 号：TG292[金属学及工艺—铸造] TG339