On the formation of centreline shrinkage porosity in the continuous casting of steel

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-05-24 DOI:10.1186/s13362-020-00084-2

Michael Vynnycky

引用次数: 6

Abstract

A recent asymptotic model for solidification shrinkage-induced macrosegregation in the continuous casting of binary alloys is extended for the purposes of understanding the link between solute segregation and centreline shrinkage porosity, a defect that commonly occurs in the continuous casting of steel. In particular, the analysis elucidates the relationship between microsegregation, mushy-zone permeability, heat transfer and centreline pressure, yielding an inequality that constitutes a criterion for whether or not centreline porosity will form. The possibilities for developing this approach to take account of gas porosity and the implementation of mechanical soft reduction to reduce macrosegregation and shrinkage porosity are also discussed.

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钢连铸中线缩孔的形成

为了更好地理解溶质偏析和中线缩孔之间的联系(中线缩孔是连铸中常出现的一种缺陷)，对二元合金连铸过程中凝固收缩引起的宏观偏析的渐近模型进行了扩展。特别地，该分析阐明了微偏析、泥质层渗透率、热传递和中线压力之间的关系，得出了一个不均匀性，该不均匀性构成了中线是否会形成孔隙的标准。本文还讨论了发展这种方法的可能性，以考虑气体孔隙度和实施机械软还原来减少宏观偏析和收缩孔隙度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.