Manufacturing method of 5-series aluminum alloy plate and aluminum alloy plate

The invention discloses a manufacturing method of a 5-series aluminum alloy plate. The manufacturing method comprises the following steps: (1) smelting and casting; (2) hot rolling is conducted, specifically, the heating temperature is controlled to be 500-540 DEG C, heat preservation is conducted for 2-10 h, and the initial rolling temperature of hot rough rolling is 500-540 DEG C; (3) cold rolling; (4) intermediate annealing is carried out, so that the average grain size after intermediate annealing is 15-40 [mu] m; and (5) secondary cold rolling: controlling the deformation to be 6%-20%. Correspondingly, the invention further discloses the 5-series aluminum alloy plate manufactured through the method. The 5-series aluminum alloy plate prepared through the method has high strength and high bending performance. 本发明公开了一种5系铝合金板材的制造方法，其包括步骤：(1)熔炼和铸造；(2)热轧：控制加热温度为500-540℃保温2-10h，并且热粗轧开轧温度为500-540℃；(3)冷轧；(4)中间退火，以使中间退火后的平均晶粒尺寸为15μm-40μm；(5)二次冷轧：控制其变形量为6％-20％。相应地，本发明还公开了采用该方法制得的5系铝合金板材。采用本发明制得的5系铝合金板材具有高强高折弯性能。