| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al-Mg-Si based aluminum alloy blank for press forming which has no need of preparing a special forming apparatus, has no generation of cracks and the generation of wrinkles upon press working, and can be stably press-formed while securing strength as the whole of a formed part. SOLUTION: An Al-Mg-Si based aluminum alloy sheet which has been subjected to solution treatment and quenching treatment is heat-treated at 180 to 250°C for 3 to 20 h, and is thereafter cut into a prescribed shape, so as to be an aluminum alloy blank 1, and only the working schedule part 2 of the blank 1 is subjected to instantaneous heating at 480 to 550°C for 0.5 to 10 s. COPYRIGHT: (C)2010,JPO&INPIT
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