Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field

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	Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field
其他题名	Oscillation Characteristics of Molten Metal Free Surface Under Compound Magnetic Field
	Deng Anyuan; Wang Engang; Xu Yongyi; Zhang Xingwu; He Jicheng
	2011
发表期刊	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN	1006-706X
卷号	18 期号:5 页码:25-+
摘要	The 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.
其他摘要	The 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.
关键词	ROUND BILLET SHAPE continuous casting compound magnetic field free surface fluctuation
收录类别	CSCD
语种	英语
资助项目	[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记录号	CSCD:4468566
引用统计	被引频次：2[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/152408
专题	中国科学院金属研究所
作者单位	中国科学院金属研究所
推荐引用方式 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-+.