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首页> 外文期刊>ISIJ international >Characteristic Transformation of Manganese-containing Inclusions during Al-killed Process in Ultra-low Carbon Interstitial-free Steel
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Characteristic Transformation of Manganese-containing Inclusions during Al-killed Process in Ultra-low Carbon Interstitial-free Steel

机译：超低碳无间隙钢中铝杀死过程中含锰夹杂物的特征转变

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摘要

Ferromanganese alloys are usually used for the manganese adjustment to meet the requirement of IF steel grade; and the formation and transformation of manganese-containing inclusions were closely relevant with the recovery yield of manganese in the melt and the morphologies of final deoxidation products. Characteristic transformation of manganese-containing inclusions during Al-killed process in ultra-low carbon interstitial-free steel were studied through the factory trial and hot crucible experiment. Factory trial showed that the manganese recovery yield fluctuated between 14% and 92% mainly due to the formation of manganese-containing inclusions. Hot crucible experiment revealed that three different groups of inclusions, including FeO·xMnO (FM), FeO-Al_2O_3 (FA) and Al_2O_3 (AO) inclusions, appeared after semi Al-killed; and five typical Al_2O_3 inclusions, including spherical Al_2O_3, polygonal Al_2O_3, cluster Al_2O_3, dendritic Al_2O_3 and aggregated Al_2O_3, appeared successively based on different formation mechanisms. Under homogenous nucleation condition, the spherical Al_2O_3 appeared firstly, and changed to be cluster Al_2O_3 by collision growth or transformed to be large dendrite Al_2O_3 by single-direction diffusion growth. Under heterogenous nucleation condition, the manganese-containing inclusions were transformed to Al_2O_3 inclusions in the following order; spherical FeO·xMnO → spherical FeO·xMnO with coarse surface → polygonal FeO·Al2O_3→polygonal Al_2O_3 → aggregated Al_2O_3.
机译：通常使用锰铁合金进行锰调整，以满足IF钢等级的要求。含锰夹杂物的形成和转变与熔体中锰的回收率以及最终脱氧产物的形态密切相关。通过工厂试验和热坩埚试验研究了超低碳无间隙钢中铝镇静过程中含锰夹杂物的特征转变。工厂试验表明，锰的回收率在14％至92％之间波动，这主要是由于含锰夹杂物的形成。热坩埚实验表明，经过半铝镇静处理后，出现了三组不同的夹杂物，包括FeO·xMnO（FM），FeO-Al_2O_3（FA）和Al_2O_3（AO）夹杂物。根据不同的形成机理，依次出现了球形Al_2O_3，多边形Al_2O_3，团簇Al_2O_3，树枝状Al_2O_3和聚集Al_2O_3五个典型的Al_2O_3夹杂物。在均匀成核条件下，球形Al_2O_3首先出现，并通过碰撞生长转变为团簇Al_2O_3，或通过单向扩散生长转变为大枝晶Al_2O_3。在异质成核条件下，含锰夹杂物按以下顺序转变为Al_2O_3夹杂物：球形FeO·xMnO→球形粗糙的FeO·xMnO→多边形FeO·Al2O_3→多边形Al_2O_3→聚集的Al_2O_3。

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  • 来源
    《ISIJ international》 |2018年第5期|886-891|共6页
  • 作者

    Min WANG; Yan-ping BAO; Li-dong XING;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Haidian District, Xueyuan Road 30, Beijing, 100083 China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Haidian District, Xueyuan Road 30, Beijing, 100083 China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Haidian District, Xueyuan Road 30, Beijing, 100083 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

    manganese-containing inclusions; Al-killed; Al_2O_3; characteristic transformation; transformation mechanisms;

    机译：含锰夹杂物;杀铝Al_2O_3;特征转换;转化机制;

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