通过末端淬火的方法研究7055铝合金厚板的淬透性,采用透射电子显微镜对微观组织进行分析.结果表明:该合金板材的淬透深度可达45 mm,使其淬透的冷却速率需大于230℃/min；随着冷却速率的减小,淬火过程析出平衡相的数量和尺寸增加,时效后析出的η'沉淀强化相的数量减少,晶界无沉淀析出带宽度增加;在所研究的冷却速率范围内,时效后铝合金板材的硬度、晶界无沉淀析出带宽度与冷却速率的对数均呈线性关系.
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