洁净钢与夹杂物[第十三届全国炼钢学术会议]

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洁净钢与夹杂物

张立峰 1)
王新华2）

1)Dept. Mechanical & Industrial Engineering Univ. of Illinois at Urbana-Champaign

2)北京科技大学冶金与生态工程学院

摘  要：本文首先论述了连铸过程中夹杂物的来源，包括内生与外来夹杂，着重于二次氧化产物、卷渣、内衬侵蚀以及在内衬耐火材料上的夹杂物聚集；其次，论述了由夹杂物而导致产品的各类缺陷，如易拉罐飞边裂纹、渣斑点以及钢板表面的线性缺陷；再次，总结了目前评估钢洁净度的“技术状况”，讨论了三十多种直接和间接的方法。最后，论述了在中间包和连铸机方面改善钢的洁净度的操作实践。
关键词：钢，夹杂物，缺陷，板坯连铸机，工厂测试，评论，检测方法
Clean Steel and Inclusions

Zhang Lifeng

(Dept. Mechanical & Industrial EngineeringUniv. of Illinois at Urbana-Champaign)

Wang Xinhua

(University of Science and Technology Beijing)

ABSTRACT This paper first reviews the sources of inclusions in continuous casting of steel including both indigenous and exogenous inclusions, focusing on reoxidation, slag entrainment, lining erosion and inclusion agglomeration on linings. Secondly, the resulting defects in continuous cast steel products are reviewed, such as flange cracked cans, slag spots, and line defects on the surface of rolled sheet. Thirdly, the current “state-of-the-art” in the evaluation of steel cleanliness is summarized, discussing over 30 different methods including direct and indirect methods. Finally, this paper reviews operating practices to improve steel cleanliness at the tundish and continuous caster.
Key Words:
Steel, Inclusions, Defects, Slab Caster, Plant Measurement, Review, Detection Methods