公开(公告)号：US06461454B2

公开(公告)日：2002-10-08

申请号：US09836370

申请日：2001-04-18

申请人： Makoto Tawara ,  Osamu Takezoe ,  Mariko Sakata ,  Shinji Matsuda ,  Masahito Katsukura ,  Tsutomu Hattori

发明人： Makoto Tawara ,  Osamu Takezoe ,  Mariko Sakata ,  Shinji Matsuda ,  Masahito Katsukura ,  Tsutomu Hattori

IPC分类号： C22C2108

CPC分类号： C22F1/043 ,  C22C21/02 ,  Y10T428/12458

摘要： An aluminum alloy plate for an automobile has a chemical composition containing 0.8 to 1.5% by mass of Si, 0.4 to 0.7% by mass of Mg and 0.5 to 0.8% by mass of Cu. The crystal grain size is 10 to 40 &mgr;m. Cu content obtained by analyzing the outermost surface of the aluminum alloy with an oxide film according to X-ray photoelectron spectroscopy (XPS) is {fraction (1/10)} to ½ of the Cu content of the bulk of the aluminum alloy plate.

公开(公告)号：US06464805B2

公开(公告)日：2002-10-15

申请号：US09817765

申请日：2001-03-26

申请人： Shinji Matsuda ,  Tsutomu Hattori ,  Masahito Katsukura ,  Tadashi Minoda ,  Hideo Yoshida ,  Shinichi Matsuda ,  Mineo Asano ,  Tsutomu Furuyama

发明人： Shinji Matsuda ,  Tsutomu Hattori ,  Masahito Katsukura ,  Tadashi Minoda ,  Hideo Yoshida ,  Shinichi Matsuda ,  Mineo Asano ,  Tsutomu Furuyama

IPC分类号： C22C2108

CPC分类号： C22C21/02 ,  C22C21/14 ,  C22C21/16 ,  C22F1/043 ,  C22F1/057

摘要： An Al—Mg—Si—Cu aluminum alloy plate excelling in strength and formability and exhibiting improved filiform corrosion resistance which is suitably used for automotive body panels. The aluminum alloy plate contains 0.25-0.6% of Mg (mass %, hereinafter the same), 0.9-1.1% of Si, 0.6-1.0% of Cu, and at least one of 0.20% or less of Mn and 0.10% or less of Cr, with the balance consisting of Al and impurities, wherein the number of Q phases (Cu—Mg—Si—Al phases) with a size of 2 &mgr;m or more in diameter present in a matrix is 150 per mm2 or more. The aluminum alloy plate is fabricated by homogenizing an ingot of an aluminum alloy having the above composition at 530° C. or more, cooling the ingot to 450° C. or less at a cooling rate of 30° C./hour or less, hot-rolling the ingot, cold-rolling the hot-rolled product, and providing the cold-rolled product with a solution heat treatment.

摘要翻译： Al-Mg-Si-Cu铝合金板具有优异的强度和成形性，并且表现出改善的丝状耐腐蚀性，适用于汽车车身面板。 铝合金板含有0.25-0.6％的Mg（质量％，以下相同），0.9-1.1％的Si，0.6-1.0％的Cu和0.20％以下的Mn和0.10％以下的至少一种 的Cr，余量由Al和杂质构成，其中存在于基体中的直径为2μm以上的Q相（Cu-Mg-Si-Al相）的数量为150个/ mm 2以上。 铝合金板通过在530℃以上均匀化具有上述成分的铝合金锭制成，以30℃/小时以下的冷却速度将锭冷却至450℃以下， 对锭进行热轧，冷轧热轧制品，并对冷轧制品进行固溶热处理。