(东北大学 材料电磁过程研究教育部重点实验室， 沈阳 110004)
摘 要: 通过实验测试和数值模拟的方法研究两段式软接触电磁连铸无缝结晶器结构、 线圈位置、 电源功率以及弯月面位置等因素对结晶器内高频磁场分布的影响。 并采用Sn作为钢液的模拟工质测量了不同实验条件下两段式结晶器内的弯月面高度。 研究结果表明： 两段式结晶器的透磁效果随着结晶器上半段厚度的减薄而提高； 增加电源功率时， 可以增大高频磁场在铸坯初始凝固区域的强度及作用范围， 有利于弯月面的形成； 线圈位置越靠上， 越有利于磁感应强度透过结晶器， 有助于弯月面高度的增大； 当金属液面位于感应线圈高度中心与线圈顶端位置之间时， 高频磁场作用于初始凝固区域的有效作用较强， 可产生较大的电磁压力， 有助于获得高表面质量的铸坯。
关键字: 软接触电磁连铸; 电磁冶金; 高频电磁场; 两段式; 无缝结晶器; 弯月面
（Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials, Northeastern University, Shenyang 110004, China）
Abstract: The experimental measurement and numerical simulation were used to study the magnetic field distribution in the two-stage soft contact electromagnetic continuous casting slit-less mold. And the height of molten metal meniscus was measured under different magnetic field conditions where Sn was used as the simulated media of molten steel. The results show that the penetration of magnetic field in the mold increases with the thickness of mold upside part decreasing. By increasing the electric power, the intensity and the effective range of the magnetic field in the region of initial solidification become larger. When the coil level gets closer to the mold top, it is much easier for the magnetic field to penetrate into the mold, and the height of meniscus becomes higher accordingly. When the meniscus level is located between the coil top level and coil center level, the effect of the high frequency magnetic field on the region of initial solidification for billet is largest, and the magnetic field distribution becomes uniform, which is helpful to improving the billet surface quality.
Key words: soft contact electromagnetic continuous casting; electromagnetic metallurgy; high frequency electromagnetic field; two-stage; slit-less mold; meniscus
