公开(公告)号：US20070217943A1

公开(公告)日：2007-09-20

申请号：US11578908

申请日：2005-04-15

申请人： Pizhi Zhao ,  Kazuhiro Shiozawa

发明人： Pizhi Zhao ,  Kazuhiro Shiozawa

IPC分类号： C22C21/08 ,  B22D11/06

CPC分类号： B22D11/003 ,  B22D11/0605 ,  C22C21/06 ,  C22C21/08 ,  C22F1/047

摘要： To provide an aluminum alloy sheet with excellent formability at high temperatures and high speeds with a reduced amount of cavities after forming and a method of production of the same. An aluminum alloy sheet consisting of 2.0-8.0 wt % of Mg, 0.06-0.2 wt % of Si, 0.1-0.5 wt % of Fe, 0.1-0.5 wt % of Mn, and the balance of Al and unavoidable impurities, wherein a density of inter-metallic compounds having an equivalent circle diameter of 1 to 5 μm is 5000/mm2 or more and an average crystal grain size is 20 μm or less. A method of production of an aluminum alloy sheet comprising the steps of casting an alloy melt having the above described composition by a twin belt casting machine at a cooling rate of 20 to 150° C./sec at the location of ¼ of the slab thickness during the casting to form a slab having a thickness of 5 to 15 mm, subsequently rewinding up the slab as a coil, cold rolling the slab taken out from the coil at a cold rolling reduction of 70 to 96%, and performing annealing heating the obtained cold rolled sheet at a heating rate of 50° C./sec or more to 420 to 500° C.

摘要翻译： 提供一种在高温高速下成形性优异的铝合金板，成形后的空腔量减少，其制造方法也是如此。 由2.0-8.0重量％的Mg，0.06-0.2重量％的Si，0.1-0.5重量％的Fe，0.1-0.5重量％的Mn和其余的Al和不可避免的杂质构成的铝合金板，其中密度 的当量圆直径为1〜5μm的金属间化合物为5000 / mm 2以上，平均结晶粒径为20μm以下。 一种铝合金板的制造方法，其特征在于，在双层带式铸造机中以20〜150℃/秒的冷却速度铸造具有上述成分的合金熔体的工序， 在铸造期间形成厚度为5〜15mm的板坯，随后将板坯卷绕成线圈，将从线圈取出的板坯以70〜96％的冷轧压下率进行冷轧，并进行退火加热 以50℃/秒以上的加热速度获得冷轧板至420〜500℃。