| 摘要 |
PROBLEM TO BE SOLVED: To provide a 6000 series Al alloy sheet improving a warm-formability and a warm-forming method therefor. SOLUTION: Al-Mg-Si based alloy sheet is composed of the range of 0.25-1.25 at% Si and Mg contents corresponding to Mg<SB>2</SB>Si composition and the gap from Mg<SB>2</SB>Si of composition and the gap from the Mg<SB>2</SB>Si of contents of these Si and Mg are respectively in the range of ≤0.5 at% and the balance aluminum with inevitable impurities, and as the characteristic of this sheet, the local extension is ≥20% at 300°C and this local extension to the whole extension is made to ≥60% and the warm formability thereof is improved. COPYRIGHT: (C)2008,JPO&INPIT
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