旋转磁场作用下Al-Cu合金的凝固特性

李霞; 杨效田

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旋转磁场作用下Al-Cu合金的凝固特性
Effects of Rotating Magnetic Field on Solidification Behavior of Al-Cu Alloy
2010年30卷第2期页码：177-179
纸质出版日期： 2010 ，
DOI：

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[1]李霞,杨效田.旋转磁场作用下Al-Cu合金的凝固特性[J].特种铸造及有色合金,2010,30(02):177-179+97.

Li Xia1, Yang Xiaotian2. Effects of Rotating Magnetic Field on Solidification Behavior of Al-Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(2):177-179.
[1]李霞,杨效田.旋转磁场作用下Al-Cu合金的凝固特性[J].特种铸造及有色合金,2010,30(02):177-179+97. DOI：

Li Xia1, Yang Xiaotian2. Effects of Rotating Magnetic Field on Solidification Behavior of Al-Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(2):177-179. DOI：

摘要

将在坩埚中熔融的Al-Cu合金迅速放置于旋转磁场之中

研究Al-Cu合金在旋转磁场作用下微观组织的变化及旋转磁场对合金结晶温度的影响

探讨了旋转磁场对金属凝固的影响机理。结果发现

旋转磁场对合金的凝固组织产生明显的细化效果

使凝固组织由原来未加磁场的粗大树枝晶变成非树枝晶组织

呈现近等轴晶颗粒

而且分布较均匀。晶间距也明显减小

同时旋转磁场使合金的结晶温度区间明显缩小。

Abstract

Effects of rotating magnetic field on microstructure and crystallized temperature of Al-（4

）Cu alloy were observed by rapidly setting molten Al-Cu alloy in rotating magnetic field. The results indicate that

in condition of rotating magnetic field

solidification structure in the alloy is converted from coarse dendrite in the alloy without rotating magnetic field into near equaixed grain with more homogeneous distribution

exhibiting obvious refining role

meanwhile

grain distance and crystallized grain region are greatly decreased. Mechanism of rotating magnetic field influencing solidification structure of Al-Cu alloy was described on the basis of theoretical mechanics and fluid mechanics.