摘要
利用低频电磁铸造工艺制备了具有细小、均匀等轴晶组织的7050铝合金铸锭,研究了均匀化处理过程中铸锭微观组织及性能的变化.结果表明,与普通DC铸造锭坯相比,低频电磁铸造铸锭有更佳的均匀化处理效果.在同样的均匀化处理条件下,低频电磁铸造铸锭的晶间低熔点相含量更低,晶内溶质元素含量更高.低频电磁铸造铸锭在均匀化处理12 h后,晶内溶质元素含量即已达到合金的平均含量;而普通铸锭在均匀化处理48 h后,晶内溶质元素含量仍低于合金的平均含量.
7050 aluminum alloy ingot with fine microstructure was prepared by low frequency electromagnetic casting （LFEC） process. The homogenization treatment showed that the LFEC ingot has a better homogenization effect than conventional DC ingot. Under the same homogenization condition, the LFEC ingot has a small amount of low melting point phases among grains and more amount of solute elements inside grains. After homogenizing for 12 h the solute concentrations in the LFEC ingot can reach the average content of the alloy, but those in the DC ingots haven＇t reached until 48 h homogenizing.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第9期956-960,共5页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划资助项目2001AA332030
关键词
7050铝合金
低频电磁铸造
均匀化处理
微观组织
7050 aluminum alloy, low frequency electromagnetic casting （LFEC）, homogenization treatment, microstructure
