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首页> 外文期刊>ISIJ international >Dynamic Distributions of Mold Flux and Air Gap in Slab Continuous Casting Mold
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Dynamic Distributions of Mold Flux and Air Gap in Slab Continuous Casting Mold

机译：板坯连铸结晶器的结晶器通量和气隙的动态分布。

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摘要

The distributions of mold flux and air gap in shell/mold gap have significant influences on the shell heat transfer in slab continuous casting mold. To describe the dynamic distribution characteristics of the mold flux and air gap, a three-dimensional thermo-mechanical model coupling with a complex interfacial heat transfer model was developed, in consideration of the interactions between the thermo-mechanical behaviors of solidified shell and distributions of mold flux and air gap. Based on these, the contact and heat transfer behaviors between the shell and mold copper plates, as well as the influence of wide face mold taper on the distributions of mold flux and air gap during a peritectic steel continuous casting were studied. The results show that the temperatures of copper plate hot faces beneath the bolt columns are higher than those beneath the deeper channels, and the calculated temperatures of copper plates coincide well with the measured data by thermocouples. Due to the thermal contraction, the shell corners in mold shrink away from mold corners as the slab moving downward, which causes the thick mold flux film and air gap concentrate around the corners and off-corners. As a result, the hot spots form at the shell off-corners. With greater wide face tapers, the thicknesses of mold flux film and air gap at wide face corner decrease. When the wide face taper increases to 4 mm, the air gap on shell wide face corner disappears near the mold exit.
机译：结晶器通量和壳/模隙中气隙的分布对板坯连铸结晶器中壳的传热有重要影响。为了描述结晶器通量和气隙的动态分布特征，考虑了凝固壳的热力学行为与熔体分布之间的相互作用，建立了具有复杂界面传热模型的三维热力学模型。脱模剂和气隙。在此基础上，研究了包晶钢连铸过程中壳与型铜板之间的接触和传热行为，以及宽面型锥度对铸型通量和气隙分布的影响。结果表明，螺栓柱下方的铜板热面温度高于深通道下方的温度，计算出的铜板温度与热电偶测得的数据吻合良好。由于热收缩，当板坯向下移动时，模具中的壳角会从模具角收缩，从而导致厚的模具熔剂膜和气隙集中在角部和偏角处。结果，热点在壳角处形成。随着较大的锥面锥度，脱模剂膜的厚度和宽角处的气隙会减小。当宽锥面锥度增加到4 mm时，壳宽面角上的气隙在模具出口附近消失。

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