发明授权
- 专利标题: High-strength aluminum alloy extruded product exhibiting excellent corrosion resistance and method of manufacturing same
- 专利标题(中): 具有优异的耐腐蚀性的高强度铝合金挤压制品及其制造方法
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申请号: US12932634申请日: 2011-03-02
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公开(公告)号: US08298357B2公开(公告)日: 2012-10-30
- 发明人: Hideo Sano , Yasuaki Yoshino
- 申请人: Hideo Sano , Yasuaki Yoshino
- 申请人地址: JP Tokyo JP Tokyo
- 专利权人: The Society of Japanese Aerospace Companies,Sumitomo Light Metal Industries, Ltd.
- 当前专利权人: The Society of Japanese Aerospace Companies,Sumitomo Light Metal Industries, Ltd.
- 当前专利权人地址: JP Tokyo JP Tokyo
- 代理机构: Flynn, Thiel, Boutell & Tanis, P.C.
- 优先权: JP2003-103121 20030407
- 主分类号: C22F1/05
- IPC分类号: C22F1/05 ; B21C23/08
摘要:
The present invention provides a high-strength aluminum alloy extruded product exhibiting excellent corrosion resistance and secondary workability and suitably used as a structural material for transportation equipment such as automobiles, railroad vehicles, and aircrafts, and a method of manufacturing the same. The aluminum alloy extruded product has a composition containing 0.6 to 1.2% of Si, 0.8 to 1.3% of Mg, and 1.3 to 2.1% of Cu while satisfying the following conditional expressions (1), (2), (3) and (4), 3%≦Si %+Mg %+Cu %≦4% (1) Mg %≦1.7×Si % (2) Mg %+Si %≦2.7% (3) Cu %/2≦Mg %≦(Cu %/2)+0.6% (4) and further containing 0.04 to 0.35% of Cr, and 0.05% or less of Mn as an impurity, with the balance being aluminum and unavoidable impurities. The cross section of the extruded product has a recrystallized structure with an average grain size of 500 μm or less.
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