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Study on Intermediate Crack in Continuous Casting Slab of Medium Carbon Steel

机译：中碳钢连铸板坯中间裂纹的研究

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摘要

According to the analysis of the macro and micro characteristics of the center of continuous casting blooms by acid wash, SEM, metallographic and scanning-type electron microscope, there was a serious segregation and some shrinkage cavities in the slab; Cracks occurred at the end of the columnar crystal and spread along the boundary of the primary dendrite. At the crack enriched a large number of impurity elements, carbon, phosphorus, sulfur, whose crystal boundary segregation is the internal factor of the intermediate cracks. Determining the originated location of intermediate cracks and calculating the total strain in this area during solidification process of slab, it is found that the load is the external factor of cracks' generation and expansion.
机译：通过酸洗，扫描电镜，金相和扫描型电子显微镜对连铸坯中心宏观和微观特征的分析，铸坯存在严重的偏析和缩孔现象。裂纹发生在柱状晶体的末端，并沿初生枝晶的边界扩展。在裂纹处富集了许多杂质元素，碳，磷，硫，它们的晶界偏析是中间裂纹的内部因素。确定板坯凝固过程中中间裂纹的起源位置并计算该区域的总应变，发现载荷是裂纹产生和扩展的外部因素。

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  • 来源
  • 会议地点 Shenyang(CN)
  • 作者

    CHEN Shao-dong; HU Zhao-fan; YUAN Yang-yang; LUOYan-zhao;

  • 作者单位

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 炼钢;
  • 关键词

    intermediate crack; slab; crystal boundary segregation;

    机译：中间裂纹平板晶界偏析;

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