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首页> 外文期刊>Ironmaking & Steelmaking >Analysis of solidification behaviour of low alloy steel ingot casting - simulation and experimental validation
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Analysis of solidification behaviour of low alloy steel ingot casting - simulation and experimental validation

机译：低合金钢铸锭凝固行为分析-模拟与实验验证。

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摘要

Solidification in a small experimental steel ingot casting was studied using finite element based simulation. Using the model, the phenomenon associated with fluid flow, temperature distribution, mushy zone formation, thermal gradient ahead of solidification front, local solidification time at various instances of solidification was examined. The heat transfer was found significant till a critical thickness of the solidified ingot. Air gap analysis during the solidification showed that, in spite of high ferrostatic pressure of liquid metal there is notable air gap in the ingot bottom. The model predicted the final piping shrinkage and some small zones of axial porosity formation. The experimental ingot showed a good match on piping shrinkage and porosity obtained from simulation. The microstructure formation in the experimental ingot could be correlated with simulation results. The approximate regime of columnar to equiaxed transition was estimated form the simulation and was matched with that obtained in the actual experimental ingot. The microstructures of the ingot at typical zones were examined in the ingot and correlated to local solidification time.
机译：使用基于有限元的模拟研究了小型实验钢锭铸件中的凝固。使用该模型，研究了与流体流动，温度分布，糊状区域形成，凝固前沿之前的热梯度，各种凝固情况下的局部凝固时间有关的现象。发现热传递显着，直到凝固的铸锭达到临界厚度为止。凝固过程中的气隙分析表明，尽管液态金属的铁静压力很高，但铸锭底部仍存在明显的气隙。该模型预测了最终的管道收缩和一些轴向孔隙形成的小区域。实验铸锭显示出从模拟获得的管道收缩率和孔隙率的良好匹配。实验锭的微观结构形成可能与模拟结果相关。通过模拟估算了从柱状到等轴转变的近似状态，并且与在实际实验锭中获得的近似状态相匹配。在铸锭中检查典型区域的铸锭的微观结构，并将其与局部凝固时间相关联。

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