Effect of Electromagnetic Stirring on the Solidification Behavior of High-Magnetic-Induction Grain-Oriented Silicon Steel Continuous Casting Slab

Li, Xin; Wang, Xianhui; Bao, Yanping; Gong, Jian; Weiguang, Pang; Wang, Min

doi:10.1007/s11837-020-04058-y

Cited by 17 publications

(5 citation statements)

References 18 publications

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“…m −1 ; and η is the magnetic permeability, H m −1 . The time-averaging Lorentz force density resulting from the interaction of induced current with magnetic field can be obtained with the following equation: (23) where Re denotes the real part of a complex number.…”

Section: Numerical Model and Boundary Conditionsmentioning

confidence: 99%

“…Jiang et al [22] investigated the slab columnar grain growth behavior by a numerical model comprising electromagnetic, fluid/dynamic, heat, and solute transport analyses, finding that the rotating EMS mode is more suitable than linear stirring for alleviating central segregation for slab continuous casting. Li et al [23] studied the effect of industrial S-EMS on the solidification behavior of grain-oriented silicon steel and pointed out that EMS can refine the grain. However, the centerline segregation of carbon and silicon increases with the increase in S-EMS current intensity.…”

Section: Introductionmentioning

confidence: 99%

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Fluid Flow, Solidification and Solute Transport in Slab Continuous Casting with Different S-EMS Installation Positions

Liu,

Zhang,

Zeng

et al. 2024

Metals

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During continuous slab casting, strand electromagnetic stirring (S-EMS) has a significant effect on improving the slab quality. In the current work, a numerical model based on the practical slab continuous casting machine and coupled electromagnetic field, flow field, solidification, and solute transport was established to investigate and evaluate the effect of the S-EMS installation position with various current intensities on metallurgical behavior. The model was verified by magnetic field measurement, infrared camera, and nail shooting experiments. The results show that moving the S-EMS installation position to the solidification end reduces the stirring effect due to the skin effect and the increasing thickness of the slab shell. A higher installation position is beneficial for improving the equiaxed grain rate, while a lower one is beneficial for reducing carbon segregation. The maximum segregation index and range decrease from 1.26 to 1.2 and from 0.42 to 0.36 with the installation position being decreased from −3 m to −12.8 m, respectively. The industrial trials show that S-EMS installed at 3 m has a significant effect on expanding the equiaxed grain zone and a deteriorating effect on reducing carbon segregation.

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Section: Numerical Model and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fluid Flow, Solidification and Solute Transport in Slab Continuous Casting with Different S-EMS Installation Positions

Liu,

Zhang,

Zeng

et al. 2024

Metals

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show abstract

“…With the increasing requirements of customers for steel quality, it is particularly important to provide defect-free continuous casting billet. The quality of billet includes two types: external and internal quality, and common defects mainly include cracks, shrinkage cavities, and segregation [1][2][3][4]. At present, in order to improve the quality of the billet, the process of continuous casting mainly involves controlling the temperature of molten steel in the tundish, supplemented with electromagnetic stirring and soft reduction processes [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Magnet Alternate Stirring on the Internal Quality of Sn-Pb Alloy

Zhang,

Bao,

Zhang

2023

Metals

Self Cite

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A permanent magnet stirrer was built to study the effect of different magnetic field stirring modes on the solidification quality of Sn-20 wt-% Pb alloy ingots. The internal quality of the ingot can be improved by adjusting both the stirring speed and the modes. When the continuous magnetic stirring mode was adopted, the higher the stirring speed, the higher the flutter height at the ingot edge. When the stirring speed was 200 rpm, the flutter height reached 4.12 mm. The rotating magnetic field can significantly refine the grain size of the ingot. When the stirring speed of the magnetic field was increased from 0 rpm to 200 rpm, the grain size of the ingot reduced from 301 μm to 241 μm. By fixing the magnetic field stirring speed to 200 rpm and adjusting the mode to the alternate stirring process, the flutter height at the ingot edge reduced to 1.86 mm, which stabilized the liquid level of the molten alloy in the crucible. In addition, the grain size of the ingot was shortened to 223 μm, and the elemental homogeneity within the ingot was optimized.

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“…The addition of alloy elements will increase the viscosity of liquid steel and reduce the feeding capacity of liquid steel at the end of solidification. This will cause central shrinkage defects in the continuous casting bloom, and form performance‐degrading central cracks, [ 12,13 ] resulting in the deterioration of the internal quality of the bloom. The serious cracks defect in the center of the bloom is difficult to eliminate in the heat rolling process.…”

Section: Introductionmentioning

confidence: 99%

Formation and Control of Central Cracks in Alloy Steel ZKG223

Zhang

Bao

Zhao

et al. 2022

steel research int.

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When the molten steel contains high carbon and alloy elements, the continuous casting bloom is prone to internal defects. Soft reduction is an effectively means of improvement and is widely utilized in the continuous casting process. Herein, the generation mechanism of the central cracks in alloy steel ZKG223 is analyzed in detail; that is, the tensile stress is generated by the accelerated solidification and shrinkage in the core of the bloom at the end of solidification, which acts on the dendrites and causes central cracks. In order to reduce the shrinkage stress during the solidification of the bloom, the reasonable reduction parameters of the bloom are determined by establishing a soft reduction model, and the industrial test is carried out. Through the implementation of well‐designed soft reduction, the central cracks in the bloom are significantly bridged, and the secondary dendrite spacing in the center of the bloom is shortened from 315 to 230 μm. The maximum positive and negative carbon segregation indices in the cross section of the bloom are changed from 1.039 and 0.957 to 1.020 and 0.977, respectively, which greatly improve the uniformity of element distribution and the internal quality of the bloom.

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Effect of Electromagnetic Stirring on the Solidification Behavior of High-Magnetic-Induction Grain-Oriented Silicon Steel Continuous Casting Slab

Cited by 17 publications

References 18 publications

Fluid Flow, Solidification and Solute Transport in Slab Continuous Casting with Different S-EMS Installation Positions

Fluid Flow, Solidification and Solute Transport in Slab Continuous Casting with Different S-EMS Installation Positions

Effect of Magnet Alternate Stirring on the Internal Quality of Sn-Pb Alloy

Formation and Control of Central Cracks in Alloy Steel ZKG223

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