静磁场对2024铝合金凝固组织的影响

程常桂; 余乐; 万文成; 刘中天; 金焱

doi:10.15980/j.tzzz.2012.02.008

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静磁场对2024铝合金凝固组织的影响
Effects of Static Magnetic Field on Solidification Structure of 2024 Aluminum Alloy
2012年32卷第2期页码：103-106
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.02.008

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[1]程常桂,余乐,万文成,刘中天,金焱.静磁场对2024铝合金凝固组织的影响[J].特种铸造及有色合金,2012,32(02):103-106.

Cheng Changgui, Yu Le, Wan Wencheng, et al. Effects of Static Magnetic Field on Solidification Structure of 2024 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(2):103-106.
[1]程常桂,余乐,万文成,刘中天,金焱.静磁场对2024铝合金凝固组织的影响[J].特种铸造及有色合金,2012,32(02):103-106. DOI： 10.15980/j.tzzz.2012.02.008.

Cheng Changgui, Yu Le, Wan Wencheng, et al. Effects of Static Magnetic Field on Solidification Structure of 2024 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2012,32(2):103-106. DOI： 10.15980/j.tzzz.2012.02.008.

摘要

通过热模拟试验及扫描电镜分析

研究了静磁场对2024铝合金显微晶粒度、凝固速度、合金元素分布的影响。结果表明

随着磁感应强度的增大

合金凝固组织明显细化

凝固时间变短

这与凝固前沿熔体内的塞贝克效应有关

使得熔体对流效应强于静磁场的制动效应;应用静磁场能够增强溶质原子在铝中的扩散

有利于提高合金元素的固溶度

减轻凝固组织的宏观偏析。

Abstract

Effects of static magnetic on the microscopic grain density

solidification rate and distribution of alloy elements in 2024 aluminum alloy were investigated by means of thermal simulation experiment and scanning electron microscope （SEM）. The results show that the solidification structure can be refined with increasing in magnetic intensity

and the solidification time is decreased

which are closely related to the Seebeck effect acting on liquid metal in solidification front as a result of enhancing the flow of liquid metal and inhibiting the electromagnetic brake effects. Furthermore

the static magnetic field can promote disfussion of solute atoms in aluminum alloy

and it is favorable to improving solid solubility of alloy elements and decreasing macro-segregation of 2024 aluminum alloy.