Effect of Vibration of Side Dam on Solidification Inside Melt Pool of Twin-Roll Thin Strip Casting

doi:10.12068/j.issn.1005-3026.2026.20240139

Abstract

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

CLC Number:

TG 244

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.

Figures/Tables 13

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

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

Fig.2 Schematic diagram of experimental system

Fig.3 Geometric model and grid division

Fig.4 Experimental results at different vibration frequencies

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

Fig.6 Grid division and independence verification

Fig.7 Numerical simulation nephogram of steel bars

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

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

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

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

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

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