| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an Al alloy sheet for forming, which is excellent in strength and formability, particularly, deep drawability. SOLUTION: An Al-Mg based or Al-Mg-Si based Al alloy is subjected to rolling, is thereafter subjected to warm difference peripheral speed rolling at 150 to 450°C and at a draft of 15 to <50%, and is subsequently subjected to softening heat treatment, so as to obtain an Al alloy sheet in which the average r value is≥0.9, and the orientation density in the ä111} face by X-ray diffraction is≥1. Further, as the rolling, warm rolling at 250 to 450°C is performed. Further, the peripheral speed ratio between the upper and lower rolls in the warm difference peripheral speed rolling is controlled to≥1:1.2, preferably, to≥1:1.5. COPYRIGHT: (C)2008,JPO&INPIT
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