Effect of Mold Electromagnetic Stirring on the Flow and Solidification of Φ 800 mm Round Blooms

Yukai Jin,Lianwang Zhang,Xiaobing Zhang,Changjun Xu,Tao Wang,Peiqi Yang,Hongjian Wu

doi:10.3390/pr10020430

Yukai Jin, Lianwang Zhang + Show 5 more

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https://doi.org/10.3390/pr10020430

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Abstract

Knowing the effect of electromagnetic force on fluid flow and solidification within the molds of large-size round blooms is of paramount importance to minimize internal and external defects. In this regard, a three-dimensional coupling model is established, containing magnetohydrodynamics, fluid flow, and heat transfer within the mold, and a new approach for the uniformity of the initial shell is presented. Meanwhile, the effect of stirring parameters on fluid flow and solidification is discussed. The results show that M-EMS can significantly change the temperature and velocity distribution within the mold. These changes can stabilize the level fluctuations and make the initial shell uniform. The maximum industrial height fluctuation was reduced from 1.9 mm to 1.3 mm when the stirring intensity was 375 A/3 Hz. The stirring intensity of M-EMS is relatively ideal.

Highlights

Effect of Mold ElectromagneticIn recent years, vertical-bending and arc casters are widely employed in alloy steel continuous casting due to their high production efficiency
Vertical continuous casting [1] and vertical semi-continuous casting [2] have been applied as a combination of ingot casting and conventional continuous casting to produce large-size round blooms to enhance large-size special steel production efficiency
The application of the modern technological packages used today in vertical-bending and arc continuous casting can be used in vertical continuous casting, such as mold electromagnetic stirring (M-EMS)

Summary

Introduction

Effect of Mold ElectromagneticIn recent years, vertical-bending and arc casters are widely employed in alloy steel continuous casting due to their high production efficiency. Some researchers did not consider heat transfer but considered fluid flow [3,4,5]; some researchers thought the comprehensive consideration of heat transfer and fluid flow to have more practical value [6,7,8,9,10,11]; and several researchers have studied macrosegregation in the billet with M-EMS [12,13,14,15] It is unknown whether the solidification and flow characteristics under electromagnetic stirring summarized by predecessors can be applied to large-size round blooms. Liu et al [16]

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