Solidification model for steel strip casting
Solidification model for steel strip casting
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带钢连铸凝固模型
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
P. Campbell
中科院分区：
文献类型：
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作者：
H. Fukase;S. Osada;Hiroyuki Otsuka;P. Campbell
本文的重点是开发模拟双辊薄带连铸中发生的凝固现象的理论模型，该模型被称为凝固壳行为模拟系统（SBS）。 SBS模型试图模拟钢带从钢液与轧辊表面最初接触到带材与轧辊分离时凝固结束的凝固过程。该模型的重点是随着凝固过程离散接触点的变化。 SBS 模型的特点包括一种新的凝固生长单元（称为透镜生长凝固）及其进一步的特征，即通过离散步骤进行透镜宽度生长、壳凝固的三个阶段（即隆起阶段、结合阶段和浮动阶段），以及通过直接接触点从壳到模具的瞬态传热方程的发展。 SBS 模型同时计算传热、壳的动态热变形和凝固前沿的进展。 SBS 模型预测的结果与在双辊带钢连铸机上进行的铸造试验获得的工厂数据相当。 SBS 模型有助于提供有关凝固壳-模具界面处发生的现象的基本见解。因此，了解关键铸造参数（如轧辊织构、钢材化学成分、铸造速度和钢材温度）对凝固的影响是可能的。
This paper is focused on the development of a theoretical model to simulate the solidification phenomena occurring in twin-roll strip casting, the model of which is referred to as solidifying shell behavior simulation system (SBS). The SBS model attempts to simulate solidification of steel strip from the initial contact between the liquid steel and the roll surface until the end of solidification when the strip is separated from the roll. A focus of the model is the change in discrete contact points as solidification progresses. Features of the SBS model consist of a new unit of solidification growth named lens growth solidification and its further feature lens width growth by discrete step, three stages of shell solidification (i.e., crowning, combining and floating stages), and development of equations of transient heat transfer from shell to mold by direct contact points. Simultaneous computation of heat transfer, dynamic thermal deformation of the shell and progress of the solidification front is performed in the SBS model. Results predicted by the SBS model compare favorably with plant data obtained from casting trials conducted on a twin-roll strip caster. The SBS model has been useful in providing fundamental insights on the phenomena occurring at the solidifying shell-mold interface. Thus, understanding the effects of key casting parameters such as roll texture, steel chemistry, casting speed and steel temperature on solidification is possible.