Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第6期    总第111期    2008年6月

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文章编号:1004-0609(2008)06-1058-06
电磁场作用下铜板带水平连铸熔体的流动和凝固特征
李伟轩1,于 湛1,邓 康1,雷作胜1,程镇康2,任忠鸣1

(1. 上海大学 现代冶金与材料制备重点实验室,上海 200072;2. 兴业电子铜带有限公司,慈溪 315336)

摘 要:

为了消除铜板带水平连铸中的微气孔、夹杂和柱状晶对接等凝固问题,提出一种基于正交磁场和直流电流相互作用的结晶器内水平电磁搅拌,并在实验室物理模拟实验的基础上,进行现场工业实验。在模拟实验中,用超声波多普勒测速仪测量该电磁搅拌下水平连铸结晶器内金属液的流动规律,并与生产实验中锌白铜板带的凝固特征相互印证,发现搅拌电流达到400 A时,板带内部气孔消失,电流达到500 A时板带出现等轴晶带,电流达到800 A时板带坯偏析率趋于零。

 

关键词: 铜熔体;水平连铸;电磁搅拌;流动;凝固

Flow and solidification characteristics of melt under electromagnetic stirring in horizontal continuous casting of copper thin-slab
LI Wei-xuan1, YU Zhan1, DENG Kang1, LEI Zuo-sheng1, CHENG Zhen-kang2, REN Zhong-ming1

1. School of Materials, Shanghai University, Shanghai 200072, China; 2. Sunshine Electronic Copper-tape Ltd. Co., Cixi 315336, China

Abstract:A new horizontal electromagnetic stirring method in mold based on the orthogonal interaction between static magnetic field and DC current was put forward to overcome the solidification disadvantages such as micro pore, inclusion and columnar crystals joint in copper thin-slab’s horizontal continuous casting. Commercial production was experimented based on the physical simulation in laboratory. In the simulation, the flow rule of melt metal in mold of horizontal continuous casting with electromagnetic stirring is measured using ultrasonic Doppler velometer, and the result is inter confirmed with the solidification characteristics is tics of zinc cupronickel thin slab in industrial product, some advantageous results are obtained that, when the current is 400 A the inner micro-pores disappear, when the current is 500 A the center equiaxed crystal layers occur and when the current is to 800 A the inner-segregation decreases to zero.

 

Key words: copper melt; horizontal continuous casting; electromagnetic stirring; flow; solidification

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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