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.