Method for annealing aluminum alloy cold-rolled strip

The invention belongs to the technical field of aluminum processing, and particularly relates to a method for annealing an aluminum alloy cold-rolled strip, which comprises the following steps of: directly coiling an iron sleeve with the wall thickness of 3mm on an aluminum alloy in a final cold-rolling pass, then carrying out roller rolling for several times, and controlling the temperature and the rolling time (rolling rate), so that the hardness of the aluminum alloy can be reduced, the machinability can be improved, and the residual stress can be eliminated. The size is stabilized, deformation and cracking tendencies are reduced, grains are refined, the structure is adjusted, and structure defects are eliminated. 本发明属于铝加工技术领域，具体涉及一种铝合金冷轧带材退火的方法，通过在冷轧最终道次的铝合金直接卷上3mm壁厚的铁套筒然后进行分次进行滚筒翻滚，控制温度、翻滚时间(翻滚速率)可以降低铝合金硬度，提高可加工性，消除残余应力，稳定尺寸，减少变形和裂纹倾向，细化晶粒，调整组织，消除组织缺陷。