发明名称 |
ALUMINUM ALLOY SHEET EXCELLENT IN PRESS-FORMABILITY AND SHAPE FIXABILITY AND METHOD OF PRODUCTION OF SAME |
摘要 |
An aluminum alloy sheet which has high strength enabling application to automobile body sheet and which is excellent in press-formability and shape fixability and a method of production of the same are provided. Aluminum alloy sheet having a composition of ingredients which contains Mg, Fe, and Ti, restricts the impurity Si to less than 0.20 mass %, and has a balance of Al and unavoidable impurities and a metal structure with an average grain size of less than 15 μm and having second phase particles with a circle equivalent diameter of 3 μm or more in a number of less than 300/mm2 and having a tensile strength of 240 MPa or more, a yield strength of less than 130 MPa, an elongation of 30% or more, and a plane strain fracture limit at a strain rate of 20/sec of 0.20 or more. |
申请公布号 |
US2015075677(A1) |
申请公布日期 |
2015.03.19 |
申请号 |
US201314387157 |
申请日期 |
2013.01.10 |
申请人 |
Nippon Light Metal Company, Ltd. |
发明人 |
Hirayama Tomoyuki;Handa Takeshi;Anami Toshiya |
分类号 |
C22F1/047;C22C21/08;B22D11/00 |
主分类号 |
C22F1/047 |
代理机构 |
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代理人 |
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主权项 |
1. An aluminum alloy sheet which is excellent in press-formability and shape fixability characterized by having a composition of ingredients which contains Mg: 3.4 to 5.5 mass %, Fe: 0.05 to 0.25 mass %, and Ti: 0.005 to 0.10 mass %, restricts the impurity Si to less than 0.20 mass %, and has a balance of Al and unavoidable impurities and a metal structure with an average grain size of less than 15 μm and having second phase particles with a circle equivalent diameter of 3 μm or more in a number of less than 300/mm2 and having a tensile strength of 240 MPa or more, a yield strength of less than 130 MPa, an elongation of 30% or more, and a plane strain fracture limit at a strain rate of 20/sec of 0.20 or more. |
地址 |
Tokyo JP |