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Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field
Alternative TitleOscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field
Deng Anyuan; Wang Engang; Xu Yongyi; Zhang Xingwu; He Jicheng
2011
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN1006-706X
Volume18Issue:5Pages:25-+
AbstractThe free surface waves of a molten low-melting point Sn-32%Pb-52%Bi alloy under the imposition of an AC and a static magnetic field were visualized and recorded by use of a laser displacement sensor and a high speed video camera. The Fourier analysis method was used to analyze the oscillation characteristics. The results show that at the center of the free surface, the azimuthal and radial oscillation mode can be found simultaneously owing to AC magnetic field. With increasing coil current intensity, the amplitude and the main frequencies of the oscillations increase, and the azimuthal fluctuation at the center of the free surface is also enhanced. The fluctuation characteristics are closely related to the turbulent flow induced by the alternating electromagnetic force. A series of regular traveling waves can be observed on free surface, and the main frequencies of oscillations at three-phase points decrease owing to superposing AC and static magnetic field. The static magnetic field can remarkably control the unstable swinging behavior of free surface. With increasing static magnetic flux density, the amplitude of oscillations at the center of free surface decreases firstly, and then increases, but the fluctuation amplitude at the triple-phase point always reduces and keeps within I mm, and the azimuthal waves at the center of free surface are weakened. Especially at 1.44 T, the radial waves are dominant. The static magnetic flux density should be controlled in an appropriate range to obtain more stable free surface. With compound magnetic field, even if the static magnetic flux density is above 1.0 T, the free surface still vibrates with lower amplitude and dominant frequency.
Other AbstractThe free surface waves of a molten low-melting point Sn-32%Pb-52%Bi alloy under the imposition of an AC and a static magnetic field were visualized and recorded by use of a laser displacement sensor and a high speed video camera. The Fourier analysis method was used to analyze the oscillation characteristics. The results show that at the center of the free surface,the azimuthal and radial oscillation mode can be found simultaneously owing to AC magnetic field. With increasing coil current intensity,the amplitude and the main frequencies of the oscillations increase,and the azimuthal fluctuation at the center of the free surface is also enhanced. The fluctuation characteristics are closely related to the turbulent flow induced by the alternating electromagnetic force. A series of regular traveling waves can be observed on free surface,and the main frequencies of oscillations at three-phase points decrease owing to superposing AC and static magnetic field. The static magnetic field can remarkably control the unstable swinging behavior of free surface. With increasing static magnetic flux density,the amplitude of oscillations at the center of free surface decreases firstly,and then increases,but the fluctuation amplitude at the triple-phase point always reduces and keeps within 1 mm,and the azimuthal waves at the center of free surface are weakened. Especially at 1.44 T,the radial waves are dominant. The static magnetic flux density should be controlled in an appropriate range to obtain more stable free surface. With compound magnetic field,even if the static magnetic flux density is above 1.0 T,the free surface still vibrates with lower amplitude and dominant frequency.
KeywordROUND BILLET SHAPE continuous casting compound magnetic field free surface fluctuation
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [National High-Tech Research and Development Program of China] ; [Program of Introducing Talents of Discipline to Universities of China]
CSCD IDCSCD:4468566
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/152408
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Deng Anyuan,Wang Engang,Xu Yongyi,et al. Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2011,18(5):25-+.
APA Deng Anyuan,Wang Engang,Xu Yongyi,Zhang Xingwu,&He Jicheng.(2011).Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,18(5),25-+.
MLA Deng Anyuan,et al."Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 18.5(2011):25-+.
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