| 摘要 |
The invention related to a flat, rolled semi-finished product made of an aluminum alloy. The aluminum alloys has the following alloy proportions in weight percentages: 2<=Mg<=5, Mn<=0.5 Cr<=0.35, Si<=0.4, Fe<=0.4, Cu<=0.3, Zn<=0.3, Ti<=0.15, other elements totaling no more than 0.15 and separately not exceeding 0.05, and the remainder consists of Al. The semifinished product is rolled from a bar ( 4 ) and, during the rolling process, is subjected to at least one intermediate tempering between two cold reduction passes and to a final soft-annealing in a chamber furnace ( 7, 9 ). The invention also relates to a method for producing said semi-finished product. A semi-finished product or this type doles not have any flow lines after shaping or deep-drawing if, according to the invention, the degree of reshaping before the first intermediate tempering is equal to at least 50% and, before the final soft-annealing, is no greater than 30%, and the semifinished product is drawn by 0.1 to 0.5% after the final soft-annealing.
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