Effects of Electromagnetic Stirring on Microstructure of Mg-Al-Si Alloy

Yang Bicheng Du Dongchao Zhu Xuexin Xu Jun Xie Lijun

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Effects of Electromagnetic Stirring on Microstructure of Mg-Al-Si Alloy
Issue 3, Pages: 26-28(2004)
Published： 2004 ，
DOI：

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[1]杨必成,杜东朝,朱学新,徐骏,谢丽君.电磁搅拌对Mg-Al-Si合金组织的影响[J].特种铸造及有色合金,2004(03):26-28+74.

Yang Bicheng Du Dongchao Zhu Xuexin Xu Jun Xie Lijun. Effects of Electromagnetic Stirring on Microstructure of Mg-Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (3):26-28(2004)
[1]杨必成,杜东朝,朱学新,徐骏,谢丽君.电磁搅拌对Mg-Al-Si合金组织的影响[J].特种铸造及有色合金,2004(03):26-28+74. DOI：

Yang Bicheng Du Dongchao Zhu Xuexin Xu Jun Xie Lijun. Effects of Electromagnetic Stirring on Microstructure of Mg-Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (3):26-28(2004) DOI：

摘要

研究了不同电磁搅拌频率和不同冷却速度对MgAl9Si合金凝固组织的影响

比较了搅拌和不搅拌两种工艺下得到的不同组织。结果表明

电磁搅拌能完全抑制树枝晶的形成

提高搅拌频率能使α Mg趋于等轴化 ;延长搅拌时间不能改变晶粒形貌

只能使组织变得更加粗大 ;此外

电磁搅拌还能促进凝固过程中Mg2 Si相的形核。

Abstract

The effects of varying stirring frequency and cooling rate on the microstructure of Mg-Al-Si alloy were examined. The comparison of the stirred microstructure with the non-stirred microstructure was conducted. The results showed that the electromagnetic stirring can completely restrain the formation of dendrites.α-Mg tended to equiaxed grain with the increase in stirring frequency while the grain morphology remained un-change and the microstructure became more coarse with extending the stirring time.In addition

the electromagnetic stirring can promote the nucleation of Mg

Si phase during solidification.