采用光学显微镜、扫描电镜、透射电镜、X射线衍射、硬度测试、电导率测试和室温拉伸性能测试等分析手段,研究了Al-6.6Zn-2.3 Mg-2.1Cu-0.12Zr合金挤压板带固溶、单级时效和双级时效制度下的组织和性能.研究表明,Al-6.6Zn-2.3Mg-2.1Cu-0.12Zr合金挤压板带采用475 ℃/2 h的固溶处理制度,析出相回溶充分,无过烧现象；合金采用475℃/2 h+120℃/24 h的T6时效处理制度,晶内析出相细小弥散,晶界析出相连续分布；合金采用475℃/2 h+110℃/8 h+160℃/28h的T74双级固溶时效处理制度,晶内析出相以η’和η为主,晶界析出物完全断开.
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