...普通连续铸造；显微组织；相对溶质固溶度[gap=1202]Key words: Al-Zn-Mg-Cu-Zr alloy; electromagnetic casting; direct chill casting; microstructure; relative intracrytalline solubility..
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分析了电磁铸造铝合金铸坯的表面和内部质量，并与普通连续铸造铸坯进行了对比。
The surface and inner qualities of aluminum alloy ingot by electromagnetic casting (EMC) have been investigated and compared with those of the direct casting (DC) one.
相反，普通连续铸造锭表面因存在振动痕和亚表面偏析等铸造缺陷，力学性能大大降低。
On the contrary, the surface imperfections, such as oscillation and subsurface segregation etc, found in DCC ingot, cause the mechanical properties drop largely.
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