Liquid Cave and Microstructure of Aluminum Alloy in Electro-magnetic Casting

Zhang Qin Cui Jianzhong Lu Guimin

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Liquid Cave and Microstructure of Aluminum Alloy in Electro-magnetic Casting
Issue 3, Pages: 6-8(2003)
Published： 2003 ，
DOI：

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[1]张勤,崔建忠,路贵民.电磁铸造Al合金过程中液穴及微观组织的研究[J].特种铸造及有色合金,2003(03):6-8+3.

Zhang Qin Cui Jianzhong Lu Guimin. Liquid Cave and Microstructure of Aluminum Alloy in Electro-magnetic Casting. [J]. Special Casting & Nonferrous Alloys (3):6-8(2003)
[1]张勤,崔建忠,路贵民.电磁铸造Al合金过程中液穴及微观组织的研究[J].特种铸造及有色合金,2003(03):6-8+3. DOI：

Zhang Qin Cui Jianzhong Lu Guimin. Liquid Cave and Microstructure of Aluminum Alloy in Electro-magnetic Casting. [J]. Special Casting & Nonferrous Alloys (3):6-8(2003) DOI：

摘要

对CREM法半连铸 70 75铝合金过程中

熔体弯月面形状、微观组织结构、溶质元素分布随磁场强度及磁场频率的变化规律进行了试验研究。结果表明 :随着磁场强度的增大及磁场频率的减小

初凝壳形成位置点降低

液穴深度变浅

溶质元素晶内含量显著增加

固溶程度和硬度得到提高

相应地

铸锭中近球形组织增加

蔷薇形组织减少

整体组织变得更加细小和均匀

Abstract

Effects of magnetic field intensity and frequency on melt meniscus shape

microstructure and distribution of solute element in 7075 aluminum alloy in CREM semi-continuous casting were investigated experimentally. The results showed that with increasing in magnetic field intensity and decreasing in frequency the position of primary solidified shell forming dropped

melt cave depth shallowed

concentration of solute element in the crystal significantly increased

solid solubility and hardness rised. Accordingly near spheroidal grain in ingot increased and rosette-shaped grains decreased

resulting in finer and more homogeneous microstructure at all.