Electromagnetic control of initial solidification in continuous casting of steel by low frequency alternating magnetic field
Electromagnetic control of initial solidification in continuous casting of steel by low frequency alternating magnetic field
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DOI：
10.2355/isijinternational.37.1112
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发表时间：
1997-11
影响因子：
1.8
通讯作者：
T. Toh;E. Takeuchi;M. Hojo;H. Kawai;Shogo Matsumura
中科院分区：
文献类型：
--
作者：
T. Toh;E. Takeuchi;M. Hojo;H. Kawai;Shogo Matsumura
铸坯表面质量的显著提高和传统连铸拉速的突破，要求采用新的初凝控制技术。作者已经接近这些问题的电磁成形的弯月面的使用，并证明了使用模拟实验的可能性。本文介绍了电磁场对钢的初始凝固影响的数值预报结果和在工频为60 Hz的螺线管磁场作用下连铸直径为180 mm的奥氏体不锈钢圆坯的实验结果。与磁流体力学和传热现象有关的数值计算结果预测，改善铸坯的表面粗糙度和改善结晶器润滑，通过降低由于弯月面成形效应的动态压力。在实验铸造中，通过施加磁场，铸坯表面变得光滑，结晶器摩擦力降低，这与数值预测一致。
A marked improvement of the surface quality of casts and a break-through in casting speed in conventional continuous casting of steel require the introduction of new technology for initial solidification control. The authors have approached these problems by the use of electromagnetic shaping of the meniscus and demonstrated the possibility using simulation experiments. This paper describes the results of numerical prediction of the effect of electromagnetic field on the initial solidification of steel and the experimental results obtained by continuous casting of round austenite stainless steel billets of 180 mm diameter with solenoidal magnetic field with main frequency, 60 Hz. The numerical results concerned with magneto-hydrodynamics and heat transfer phenomena predicted improvement of the surface roughness of the cast billet and improvement of mold lubrication by decreasing the dynamic pressure due to the meniscus shaping effect. In the experimental casting, the surface of billets were smoothed and the mold friction force was reduced by imposing the magnetic field, which are in consistent with the numerical predictions.