中文摘要：

为确定工业实验基本参数,对电磁软接触连铸结晶器进行了优化设计计算,设计制作了φ100 mm圆坯电磁软接触连铸结晶器,利用Sn-Pb-Bi合金实验研究了结晶器内的弯月面行为,并进行了w（C）为0.22%钢坯的电磁软接触连铸实验。结果表明,电磁软接触连铸结晶器内磁场和弯月面变形具有不均匀性,切缝数为12时,磁场周向分布和弯月面变形较均匀。输入功率增加,弯月面高度增高,液面波动加剧。对于Ф100 mm圆坯电磁软接触连铸系统,功率可控制在50-60 kW左右。实际应用中,浇注液面应控制在线圈中心偏上位置。较低的电源频率可获得较高的弯月面,频率应控制在20 kHz左右,可获得较高的周向均匀的磁场。获得了表面质量改善的电磁软接触连铸钢坯。随功率增加,铸坯表面依次会出现环状振痕、无振痕和波纹状振痕等3种振痕形态。

英文摘要：

Based on the numerical simulation, a round soft-contact mold with diameter 100 mm was designed. Using molten Pb-Sn-Bi low-melting alloy, the meniscus behavior in the round billet continuous caster with high frequency magnetic field was investigated. The effects of some parameters, such as frequency, electric power and metal level, on the meniscus deformation were discussed. The 0.22% （wt） C carbon steel was successfully casted in the pilot continuous casting machine. The results show that on the azimuthal direction the magnetic flux density distribution and meniscus deformation are relatively homogeneous when the slit number is 12. With power increasing, meniscus height increases, but the meniscus fluctuation is more intensified, the power should be controlled in an appropriate range. The reasonable power is about 50-60 kW. In practice, the metal level should be controlled between the center and the top of coil. The lower the frequency, the higher the meniscus height, and the optimal frequency is about 20 kHz. The 4100 mm 0.22% C carbon steel with smooth surface is obtained by applying alternative magnetic. It shows that the oscillation mark of billet surface have three different statuses, annular oscillation, smooth surface and ripple oscillation respectively.