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通过显微硬度、拉伸测试,透射电镜分析等手段研究了形变热处理工艺对2519铝合金组织与力学性能的影响.结果表明:冷轧变形加速了2519铝合金在165℃下的时效过程,缩短了峰值时效时间,并随冷轧变形程度的增加,析出强化相θ'相愈弥散、愈细小,这些弥散而细小的θ'相有利于阻碍位错的运动,从而提高合金的强度;随冷轧变形量的增加2519铝合金中的无沉淀析出带逐渐变窄,合金的伸长率逐渐降低.2519铝合金时效前的冷轧变形量应在10%~15%之间.

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