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Influence of FC-Mold on the Full Solidification of Continuous Casting Slab

机译:FC铸模对连铸板坯完全凝固的影响

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摘要

A three-dimensional model coupling fluid flow, heat transfer, solidification for slab continuous casting process with flow control mold (FC-Mold) was constructed. The full solidification process from the meniscus to the solidification end of slab was obtained for the first time. The calculation domain was designed according to the actual dimension of the continuous caster. The main results show that the calculated flow speed on the meniscus at different casting speeds and the calculated shell profile had a good agreement with the measured flow speed using nail board measurement and the shell with breakout. The application of FC-Mold could improve the symmetry of flow in width, and suppress the formation of vortices on the meniscus. The decrease of upper magnetic field intensity of FC-Mold reduced the washing effect on the solidifying front, and favored the shell growth in the mold region. In the secondary cooling zone, the shell thickness increased gradually, and the shell grew quickly at the final stage of solidification for the whole mushy form of steel. In addition, FC-Mold had an effect on the shape and position of the solidification end.
机译:利用流控模具(FC-Mold)建立了板坯连铸过程中流体流动,传热,凝固耦合的三维模型。首次获得了从弯液面到板坯凝固端的完全凝固过程。计算范围是根据连铸机的实际尺寸设计的。主要结果表明,在不同浇铸速度下弯月面的计算流速和壳轮廓的计算结果与使用钉板测量和壳破裂的测量流速具有良好的一致性。 FC-Mold的应用可以改善宽度方向上流动的对称性,并抑制弯月面上涡旋的形成。 FC-模具的上部磁场强度的降低降低了对凝固前沿的洗涤效果,并有利于模具区域中的壳生长。在二次冷却区,壳的厚度逐渐增加,并且在凝固的最后阶段,对于整个糊状形式的钢,壳的生长迅速。另外,FC-Mold对凝固端的形状和位置有影响。

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