公开(公告)号：EP1902150A1

公开(公告)日：2008-03-26

申请号：EP06849740.3

申请日：2006-03-22

申请人： KAISER ALUMINUM & CHEMICAL CORPORATION

发明人： BROOKS, Charles, E. ,  DORWARD, Ralph, C. ,  PARKINSON, Ray, D. ,  MATUSKA, Rob, A. ,  SHAARBAF, Mory

IPC分类号： C22C21/10 ,  C22F1/053

CPC分类号： C22C21/10 ,  C22F1/053

摘要： High strength aluminum alloys based on the Al-Zn-Mg-Cu alloy system preferably include high levels of zinc and copper, but modest levels of magnesium, to provide increased tensile strength without sacrificing toughness. Preferred ranges of the elements include by weight, 8.5-10.5% Zn, 1.4-1.85 % Mg, 2.25-3.0% Cu and at least one element from the group Zr, V, or Hf not exceeding about 0.5%, the balance substantially aluminum and incidental impurities. In addition, small amounts of scandium (0.05-0.30%) are also preferably employed to prevent recrystalization. During formation of the alloys, homogenization, solution heat treating and artificial aging processes are preferably employed.