行波磁场高推力铸流电磁搅拌是抑制不锈钢、硅钢等钢种连铸板坯发达柱状晶组织的前沿技术。铁素体不锈钢板材成形过程中常见的皱折缺陷(Ridging defect)与其发达柱状晶铸态组织密切相关。为揭示各种行波磁场铸流搅拌的电磁冶金效果，基于计算域分段法建立了断面1280mm×200mm板坯连铸电磁、流动、传热和凝固的耦合模型，利用电气参数和磁感应强度的实测值和预测值的比对验证了模型的可靠性。研究表明：行波磁场搅拌器因电磁推力的方向性特点在板坯二冷区搅拌过程中均表现有不同程度与特征的端部效应，辊后箱式搅拌器(Box-typed electromagnetic stirrer, B-EMS)的单侧安装形式导致板坯内弧侧磁感应强度远大于外弧侧，辊式搅拌器(Roller-typed electromagnetic stirrer, R-EMS)的对辊安装形式则呈现对称分布。在400kW和7Hz的相同电气参数下，R-EMS的电流强度比B-EMS高75A；尽管箱式电磁搅拌的有效作用区域较辊式电磁搅拌大，铸坯中心钢液过热耗散区域大，但辊式搅拌推动钢液冲刷凝固前沿形核作用则明显大于箱式搅拌。两者均具有较好的抑制柱状晶生长、促进凝固前沿等轴晶形核与发展的能力，将不锈钢板坯等轴晶率提高至45%的门槛值以上，其中间隔型反向辊式搅拌器下的等轴晶率比箱式搅拌高约17%。综合表明，基于行波磁场铸流搅拌的间隔型反向辊式搅拌器有望更好地消除铁素体不锈钢板材表面皱折缺陷。
The strand electromagnetic stirring by travelling wave magnetic field is one of cutting-edge technologies in continuous casting to eliminate the easily developed columnar crystal structure in stainless and/or silicon steel slab castings. The popular ridging defect on the surface of ferritic stainless strip products has been proved to be closely related to its well developed as-cast columnar crystal structure. To explore the various electromagnetic properties of travelling magnetic fields applied on the secondary cooling zone of slab casting strand, a coupled math model for the analysis of electromagnetic, fluid flow, heat transfer and solidification behavior has been developed through segmented computational domain method, which has been proved correct in advance by an electromagnetic measurement experiment. It shows by the modeling analysis, that there are somewhat end effects in the slab strand upon molten steel stirring based on the travelling magnetic wave fields. It has been also observed that the intensity of magnetic induction under box-typed electromagnetic stirrer（B-EMS） is much larger in the strand inner side than the outside, as compared with the symmetric behavior while applying a roller-typed electromagnetic stirrer（R-EMS）. Under a given electrical power of 400kW with frequency 7Hz，the current intensity of R-EMS is higher than the B-EMS by 75A, which should supply more efficient stirring effect to promote equiaxed crystal nucleation in front of the solidified shell. Is has been proved by casting experiments in a stainless steel slab caster, that both the B-EMS and the R-EMS can inhibit the growth of columnar crystals through nucleation ahead its dendrites, which can obtain equiaxed crystal ratio of the slab casting over 45% of its threshold value. And a kind of two pair of rollers R-EMS with inverse thrust EMS forces can produce 17% higher equiaxed crystal ratio than B-EMS, which can be expected to use in casting production of ferritic stainless steels without any ridging defects in its final strip products.