软接触结晶器电磁连铸保护渣道的动态压力  

MOLD FLUX CHANNEL DYNAMIC PRESSURE IN ELECTROMAGNETIC CONTINUOUS CASTING

作　　者：雷作胜[1] 任忠鸣[1] 阎勇刚[1] 邓康[1] 

机构地区：[1]上海大学上海市钢铁冶金新技术应用开发重点实验室,上海200072

出　　处：《金属学报》2004年第5期546-550,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金59734080;59974017

摘　　要：通过模型实验,测量了在不同强度高频电磁场作用下液态金属弯月面形状,计算了保护渣道宽度及在结晶器振动一个周期内保护渣道动态压力变化情况。结果表明,高频电磁场能够显著减小保护渣道内动态压力的变化,这是软接触结晶器电磁连铸技术改善铸坯表面质量的一个可能机理。计算还表明,磁场强度的增加并不能无限制地减小保护渣遭内动态压力,为获得最佳的铸坯表面质量,存在一个最合适的磁感应强度。Molten metal meniscus profile and mold flux channel width are measured under high frequency magnetic field with different intensities by model experiments, then the dynamic pressure in mold flux channel is calculated during one mold oscillation period. It is found that the high frequency magnetic field can decrease the dynamic pressure greatly, which may be one possible mechanism of improving the billets surface quality by soft-contact mold electromagnetic continuous casting. According to the calculation, the mold flux channel dynamic pressure can not be decreased unlimitedly by increasing magnetic flux density, there must be a most appropriate magnetic flux density in order to get best billet surface quality.

关 键 词：电磁连铸 保护渣道 动态压力 

分 类 号：TG249.7[金属学及工艺—铸造] TG111.4