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Aluminum alloy plate obtained by the production method and the method of producing a high strength and high formability aluminum alloy plate
Aluminum alloy plate obtained by the production method and the method of producing a high strength and high formability aluminum alloy plate
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机译:通过该生产方法获得的铝合金板以及生产高强度和高成形性铝合金板的方法
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摘要
PROBLEM TO BE SOLVED: To provide a method for producing an aluminum alloy sheet by which, as for an Al-Mg alloy containing a relatively small amount of Mg of 3.0 to 5.0%, a sheet material having a fine recrystallized grain structure and excellent in strength and formability can be produced without undergoing recrystallization annealing and to provide an aluminum alloy sheet obtainable by the same method. ;SOLUTION: An aluminum alloy sheet containing 3.0 to 5.0% Mg, and the balance Al with impurities is cold-rolled at a draft of ≥70% to form the structure of the matrix of the same aluminum alloy sheet into the unrecrystalled one, and, after that, the aluminum alloy sheet is stretched at 200 to 300°C at a strain rate of ≥1×10-4/sec and a tensile amount of ≥10%. By this producing method, the above unrecrystallized structure is dynamically recrystallized, by which the aluminum alloy sheet having the average crystal grain size of ≤3 μm can be obtained.;COPYRIGHT: (C)2001,JPO
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