Observation of Initial Interfacial Reaction between High Aluminum Molten Steel and CaO–Al2O3 Inclusion at 1873 K Using Laser Confocal Scanning Microscopy and Micro‐Computerized Tomography

IF 1.9 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

steel research international Pub Date : 2024-07-29 DOI:10.1002/srin.202300803

Weijian Wang, Yuan Gao, Ying Ren, Lifeng Zhang

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Abstract

A new method is proposed to investigate the transient reaction between the CaO–Al2O3 inclusion from slag entrainment and the high aluminum molten steel. The confocal laser scanning microscopy, the X‐ray computerized tomography technology, and the scanning electron microscope‐energy dispersive spectrometer are combined to observe the variation of the size, shape, and composition of the entrained slag inclusion with time. The CaO in the inclusion is reduced by the dissolved aluminum in the molten steel. With the increase of the dissolved aluminum content from 0.02 to 5.73 wt%, the CaO in inclusions under equilibrium state decreased from 55 to 35 wt%. The reaction between the dissolved aluminum in the steel and the CaO in the calcium aluminate inclusion at 1873 K is discussed through thermodynamic and kinetic calculations, which are consistent with experimental results. It is indicated that the mass transfer coefficient of the CaO in the inclusion is 2.95 × 10−5 m s−1.

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利用激光共聚焦扫描显微镜和微型计算机断层成像技术观察 1873 K 时高铝熔融钢与 CaO-Al2O3 包裹体之间的初始界面反应

提出了一种新方法来研究夹渣产生的 CaO-Al2O3 包合物与高铝钢水之间的瞬时反应。结合共焦激光扫描显微镜、X 射线计算机断层扫描技术和扫描电子显微镜-能量色散光谱仪，观察夹渣包体的大小、形状和成分随时间的变化。夹渣中的 CaO 会因钢水中的溶解铝而减少。随着溶解铝含量从 0.02 wt% 增加到 5.73 wt%，平衡状态下夹杂物中的 CaO 从 55 wt% 降低到 35 wt%。通过热力学和动力学计算讨论了 1873 K 时钢中的溶解铝与铝酸钙夹杂物中的氧化钙之间的反应，结果与实验结果一致。结果表明，包体中 CaO 的传质系数为 2.95 × 10-5 m s-1。

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来源期刊

steel research international 工程技术-冶金工程

CiteScore

3.30

自引率

18.20%

发文量

319

审稿时长

1.9 months

期刊介绍： steel research international is a journal providing a forum for the publication of high-quality manuscripts in areas ranging from process metallurgy and metal forming to materials engineering as well as process control and testing. The emphasis is on steel and on materials involved in steelmaking and the processing of steel, such as refractories and slags. steel research international welcomes manuscripts describing basic scientific research as well as industrial research. The journal received a further increased, record-high Impact Factor of 1.522 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). The journal was formerly well known as "Archiv für das Eisenhüttenwesen" and "steel research"; with effect from January 1, 2006, the former "Scandinavian Journal of Metallurgy" merged with Steel Research International. Hot Topics: -Steels for Automotive Applications -High-strength Steels -Sustainable steelmaking -Interstitially Alloyed Steels -Electromagnetic Processing of Metals -High Speed Forming