| 包晶相变对连铸坯初生坯壳凝固收缩的影响 |
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| 引用本文： | 荆德君,刘中柱,蔡开科.包晶相变对连铸坯初生坯壳凝固收缩的影响[J].钢铁研究学报,1999,11(3):9-13. |
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| 作者姓名： | 荆德君 刘中柱 蔡开科 |
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| 作者单位： | 北京科技大学冶金学院,北京,100083 |
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| 摘 要： | 基于Ｆｅ－Ｃ合金的微观组织结构，建立了碳钢线性热膨胀系数计算模型，计算出不同碳含量的钢各在不同温度下的瞬时线性热膨胀系数，并将计算相应用于铸坯热－弹－塑性应力模型，研究了包晶相变对连铸坯初生坯壳凝固收缩的影响，模拟结果表明：浇铸碳含量在０．１％附近的包晶钢时，初生坯壳在靠近弯月面区域和角部区域的收缩很不规划，容易诱发表面缺陷。
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| 关 键 词： | 连铸 铸坯 包晶相变 热膨胀系数 热-弹-塑性应力模型 凝固收缩 |
Influence of Peritectic Phase Transformation on the SolidificationShrinkage of Initial Shell in Continuous Casting of Steel |
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| Jing Dejun,Liu Zhongzhu,Cai Kaike.Influence of Peritectic Phase Transformation on the SolidificationShrinkage of Initial Shell in Continuous Casting of Steel[J].Journal of Iron and Steel Research,1999,11(3):9-13. |
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| Authors: | Jing Dejun Liu Zhongzhu Cai Kaike |
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| Abstract: | Based on the
microstructure of Fe-C alloy, a mathematical model is established to compute the instant
linear thermal expansion coefficient of carbon steels with different carbon contents at
different temperatures. By applying the computed results of thermal expansion coefficient
to a thermal-elastoplastic stress model of continuous casting billet, the influence of
peritectic phase transformation on the solidification shrinkage of initial shell in
continuous casting of steel is studied. The simulation results show that the initial shell
shrinks irregularly near the meniscus and corner for casting peritectic steel. The
irregularity makes billet easy to form surface defects. |
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