DC casting of light alloys under magnetic fields

The working principle of LFEC（Low frequency electromagnetic casting） process developed in Northeastern University, China was introduced and the metallurgical results of LFEC were discussed according to the casting practices. The low frequency field around the mold produces Lorenz force, which can be...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2010-11, Vol.20 (11), p.2046-2050
Main Author: 崔建忠 张志强 乐启炽
Format: Article
Language:English
Subjects:
Alloy development
Billet casting
China
DC casting
Direct chill casting
grain refinement
Ingot casting
Intermetallic compounds
Levitation casting
light alloy
Liquids
low frequency electromagnetic field
Magnetic fields
Molds
东北大学
低频电磁场
低频电磁铸造
合金铸造
显微组织
电解金属锰
直流磁场
表面质量
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Summary:The working principle of LFEC（Low frequency electromagnetic casting） process developed in Northeastern University, China was introduced and the metallurgical results of LFEC were discussed according to the casting practices. The low frequency field around the mold produces Lorenz force, which can be divided into two parts： one is the potential force which will be balanced by a pressure gradient of the liquid and results in the formation of a convex surface meniscus and improves the surface quality; the other is the rotary force which stirs the liquid in the mold to refine the microstructures and homogenize the distribution of alloying elements. LFEC can refine microstructures remarkably, improve surface quality of the ingots, depress macrosegregation and eliminate cracks. Some new technologies, such as horizontal direct chill casting under low-frequency electromagnetic field （HLEC）, DC casting of hollow billets under electromagnetic fields （HBEC）, electromagnetic modifying of hypereutectic A1-Si alloys（EMM）, air film casting under static magnetic field （AFCM）, and multi-ingots casting under low-frequency magnetic field （MLFEC） were developed based on LFEC.
ISSN:1003-6326
DOI:10.1016/S1003-6326(09)60415-5