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首页> 外文期刊>ISIJ international >Numerical Computation for Metallurgical Behavior of Primary Inclusion in Compact Strip Production Mold
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Numerical Computation for Metallurgical Behavior of Primary Inclusion in Compact Strip Production Mold

机译：紧凑带钢模具中主要夹杂物冶金行为的数值计算

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摘要

Steady molten steel flow in CSP (Compact Strip Production) thin slab mold has been calculated via numerical simulation with heat transfer and solidification considered, and then the trajectories of inclusions have been calculated based on the flow field simulated. The solidifying shell has great influence on fluid flow and heat transfer in thin slab CSP mold, thus it should not be neglected while investigating the inclusion metallurgical behavior. The influence of solidifying shell on inclusion behavior has been particularly evaluated. Because the complex and irregular geometry of solidification front, grid of solidification front in mold has been used to judge whether inclusion is absorbed. Through the trajectories of inclusions, a statistics method to study the motion and distribution of inclusions by the "collision event" between inclusions and sampling surfaces has been used. The influence of inclusion diameter, density and casting speed on inclusion removal, also inclusion distribution within the solidifying shell in mold have been evaluated using this method. It is concluded that the distribution of inclusions in solidifying shell is not well-proportioned mainly due to fluid flow pattern in mold, diameter of inclusion, density of inclusion and casting speed. The ratio of inclusion floating to free surface decreases with casting speed rising, and the time for inclusions to float to free surface gets shorter. Inclusions with larger diameter are more possible to be frozen in solidifying shell with shallow skin depth. Removal of inclusions with smaller diameter is not sensitive to the above factors.
机译：通过考虑传热和凝固的数值模拟，计算了CSP（薄带生产）薄板坯模具中钢水的稳定流动，然后根据模拟的流场计算了夹杂物的轨迹。凝固壳对薄板CSP模具中的流体流动和传热有很大影响，因此在研究夹杂物的冶金行为时不应忽略它。已经特别评估了固化壳对夹杂行为的影响。由于凝固前沿的几何形状复杂且不规则，因此已使用模具中凝固前沿的网格来判断夹杂物是否被吸收。通过夹杂物的轨迹，使用了一种统计方法来研究夹杂物与采样表面之间的“碰撞事件”引起的夹杂物的运动和分布。使用该方法评估了夹杂物直径，密度和铸造速度对夹杂物去除以及结晶器凝固壳内夹杂物分布的影响。结论：凝固壳中夹杂物的分布不均衡，主要是由于结晶器内的流体流动方式，夹杂物的直径，夹杂物的密度和铸造速度所致。随着铸造速度的提高，夹杂物漂浮在自由表面上的比例降低，夹杂物漂浮在自由表面上的时间缩短。直径较大的夹杂物更可能被冻结在表皮深度较浅的凝固壳中。去除直径较小的夹杂物对上述因素不敏感。

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  • 来源
    《ISIJ international》 |2012年第10期|p.1824-1831|共8页
  • 作者

    Xiaopeng SONG; Susen CHENG; Zijian CHENG;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China;

    State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China;

    State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,Jiuquan Iron & Steel (Group) Co., Ltd, Jiayuguan, 735100 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CSP thin slab; inclusion; numerical simulation; solidifying shell;

    机译：CSP薄板;包含数值模拟凝固壳;

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