Optimization of Vortex Slag Entrainment during Ladle Teeming Process in the Continuous Casting of Automobile Outer Panel

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.202400322

Haichen Zhou, Haibo Li, Xiaoxuan Deng, Baisong Liu, Chenxi Ji, Bin Chen, Chong Wang, Changliang Zhao

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Abstract

With the thinner of the automobile panel, the press crack defects caused by the large‐size calcium aluminate inclusions at the automakers become obvious. Herein, in order to stabilize the control of calcium aluminate inclusions in the molten steel, the vortex slag entrainment (VSE) of a 300 ton ladle is investigated by the numerical simulation. The effects of the steel throughput, cofferdam height close to the nozzle, and ladle bottom structure on the VSE are analyzed. Results demonstrate that the residual molten steel (RMS) in the ladle and the critical height of the vortex increase with the increasing of the steel throughput. The RMS increases with the increasing of the cofferdam height when the VSE occurs. When the cofferdam height is 50, 100, and 150 mm, the RMS are 4.71, 7.19, and 9.62 t at the initial time of the VSE with a 7.5 ton min−1 steel throughput. In addition, the industrial trial of transforming the flat bottom ladle into the slope bottom ladle is carried out to control the VSE and reduce the RMS. The average weight of the RMS after pouring 25 heats of the slope ladle bottom ladle is 1.85 t less than that of the flat bottom ladle.

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汽车外板连铸中钢包浇注过程中涡流夹渣的优化设计

随着汽车板材的变薄，汽车制造商因大尺寸铝酸钙夹杂物而导致的压裂缺陷变得越来越明显。为了稳定控制钢水中的铝酸钙夹杂物，本文通过数值模拟研究了 300 吨钢包的涡流夹渣（VSE）。分析了钢水吞吐量、靠近喷嘴的围堰高度和钢包底部结构对 VSE 的影响。结果表明，钢包中的残余钢水（RMS）和涡流临界高度随着钢水吞吐量的增加而增加。发生 VSE 时，RMS 随围堰高度的增加而增加。当围堰高度为 50、100 和 150 毫米时，在钢水吞吐量为 7.5 吨/分钟-1 时，VSE 初始时的有效值分别为 4.71、7.19 和 9.62 吨。此外，还进行了将平底钢包改造为斜底钢包的工业试验，以控制 VSE 并降低 RMS。坡底钢包浇铸 25 次后的 RMS 平均重量比平底钢包少 1.85 吨。

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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