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为了获得高质量的连铸坯 ,提出了在连铸结晶器外施加复合电磁场的电磁铸造方法。规范和测定了冷坩埚式铜铸型内复合电磁场的分布 ;采用低熔点金属镓和 Sn- 4.5 % Pb合金模拟高熔点钢 ,研究了在水冷铜铸型外施加复合电磁场对结晶器弯月面处金属液运动行为及铸坯质量的影响。实验结果表明 :复合电磁场能够有效地抑制结晶器弯月面处金属液波动变形 ,并改善铸坯的表面质量。随着搅拌线圈磁通密度的增加 ,铸坯的凝固组织由柱状晶转变为等轴晶 ,使晶粒得到细化
In order to obtain a high quality slab, an electromagnetic casting method of applying a composite electromagnetic field outside the continuous casting mold is proposed. The distribution of composite electromagnetic field in cold crucible copper mold was regulated and determined. The low melting point gallium metal and Sn-4.5% Pb alloy were used to simulate the high melting point steel. The effect of composite electromagnetic field on the mold meniscus The movement of molten metal and the effect of slab quality. The experimental results show that the composite electromagnetic field can effectively suppress the fluctuation of liquid metal at the meniscus of the mold and improve the surface quality of the slab. With the increase of the magnetic flux density of the stirring coil, the solidified structure of slab changes from columnar crystal to equiaxed crystal,