采用力学性能实验、金相分析以及正交设计实验,研究了单级和多级固溶处理条件对高强Al-Zn-Mg-Cu合金薄板力学性能的影响.结果表明,高强Al-Zn-Mg-Cu合金薄板合适固溶处理温度为470℃,延长固溶处理时间对其横向强度和延伸率不利.250℃×2h+420℃×4h+450℃×3h+470℃×80min的多级固溶处理有提高Al-Zn-Mg-Cu合金薄板强度的作用.470℃最终固溶处理之前的多级预固溶处理有阻碍合金薄板在最终固溶处理时再结晶的作用.
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