侧封板振动对双辊薄带铸轧熔池内凝固的影响

doi:10.12068/j.issn.1005-3026.2026.20240139

摘要/Abstract

摘要：

对侧封板振动条件下双辊薄带铸轧熔池内凝固特性进行了数值模拟，分析了不同振动频率、振幅和浇铸温度对于双辊薄带铸轧熔池内钢液凝固的影响.设计了机械振动实验对数值模型的准确性进行验证.结果表明：振动的加入将会加速金属熔体的凝固速度，且随着振动频率的增大，熔融金属的凝固速度将得到进一步加快；侧封板处的热流密度大，导致钢液凝固速度增加，液相体积分数沿水平方向从侧封板到熔池中心逐渐降低；浇铸温度升高会导致熔池内糊状区减小，Kiss点位置降低.研究得出最优振动频率为13 Hz，最优振幅为0.5 mm，浇铸温度不宜高于1 860 K.

关键词: 双辊薄带铸轧, 侧封板, 振动, 凝固, 数值模拟

Abstract:

A numerical simulation was conducted to investigate the solidification characteristics inside the melt pool during twin-roll thin strip casting under side dam vibration. The effects of vibration frequency， amplitude， and casting temperature on molten steel solidification in the melt pool were analyzed. The mechanical vibration experiment was designed to validate the accuracy of the numerical model. Results show that applying vibration accelerates molten metal solidification rate， and higher vibration frequency further enhances the solidification rate. Due to the high heat flux density at the side dam， the solidification rate of the molten steel increases， leading to a decreasing trend in liquid fraction from the side dam to the center of the melt pool along the horizontal direction. Elevated casting temperature reduces the melt pool’s mushy zone size and lowers the Kiss point position. The study finds that the optimal vibration frequency is 13 Hz， the optimal amplitude is 0.5 mm， and the casting temperature should not exceed 1 860 K.

Key words: twin-roll thin strip casting, side dam, vibration, solidification, numerical simulation

中图分类号:

TG 244

李萱萱, 蒋恩, 刘刚, 胡贤忠. 侧封板振动对双辊薄带铸轧熔池内凝固的影响[J]. 东北大学学报（自然科学版）, 2026, 47(1): 123-130.

Xuan-xuan LI, En JIANG, Gang LIU, Xian-zhong HU. Effect of Vibration of Side Dam on Solidification Inside Melt Pool of Twin-Roll Thin Strip Casting[J]. Journal of Northeastern University(Natural Science), 2026, 47(1): 123-130.

图/表 13

表1 熔池物理模型尺寸 (mm)

Table 1 Physical model size of melt pool

物理参数	数值
结晶辊半径（R）	250
带坯厚度（δ）	4
结晶辊宽度（D_P）	600
布流器长度（L）	550
布流器出口长度（l）	50
布流器出口宽度（d）	10
布流器入口宽度（D）	54

图1 熔池物理模型示意图

Fig.1 Schematic diagram of melt pool’s physical model

图2 实验系统示意图

Fig.2 Schematic diagram of experimental system

图3 几何模型及网格划分（a）—几何模型；（b）—网格划分.

Fig.3 Geometric model and grid division

图4 不同振动频率下实验结果（a）—实验样品；（b）—等效长度.

Fig.4 Experimental results at different vibration frequencies

图5 不同振动频率下实验与模拟结果对比

Fig.5 Comparison of experiment and simulation results under different vibration frequencies

图6 网格划分及无关性验证（a）—网格划分；（b）—网格无关性验证.

Fig.6 Grid division and independence verification

图7 钢棒数值模拟云图

Fig.7 Numerical simulation nephogram of steel bars

图8 熔池物理模型不同位置选取示意图

Fig.8 Schematic diagram of position selection on melt pool’s physical model

图9 熔池内近侧封板面上的液相体积分数分布（a）—不同振动频率；（b）—不同振幅；（c）—不同浇铸温度.

Fig.9 Liquid volume fraction distribution near side dam in melt pool

图10 y对称面上的液相体积分数分布（a）—不同振动频率；（b）—不同振幅；（c）—不同浇铸温度.

Fig.10 Liquid volume fraction distribution on y-symmetry plane

图11 熔池横向中心处的液相体积分数分布（a）—不同振动频率；（b）—不同振幅；（c）—不同浇铸温度.

Fig.11 Liquid volume fraction distribution at horizontal center of melt pool

图12 熔池近侧封板处中心线液相体积分数分布（a）—不同振动频率；（b）—不同振幅；（c）—不同浇铸温度.

Fig.12 Liquid volume fraction distribution on centerline near side dam of melt pool

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