摘要 |
A process is described for producing an aluminum alloy sheet having excellent bendability for use in forming panels for automobiles. An aluminum alloy is used comprising 0.5 - 0.75% by weight Mg, 0.7 - 0.85% by weight Si, 0.15 -0.35% by weight Mn 0.1 - 0.3% by weight Fe, optionally 0.2 - 0.4% by weight Cu and the remainder Al and incidental impurities, and this alloy is cast into ingots by semi-continous casting. The ingot is subjecting to hot rolling and cold rolling, followed by solution heat treatment of the formed sheet. This sheet material is then pre-aged by rapidly cooling from an initial pre-aging temperature of at least 80 DEG C t room temperature at a cooling rate of more than 5 DEG C/hour.
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申请人 |
ALCAN INTERNATIONAL LIMITED;BULL, MICHAEL, JACKSON;GUPTA, ALOK, KUMAR;LLOYD, DAVID, JAMES;MAROIS, PIERRE, H.;SORENSEN, JOHN |
发明人 |
BULL, MICHAEL, JACKSON;GUPTA, ALOK, KUMAR;LLOYD, DAVID, JAMES;MAROIS, PIERRE, H.;SORENSEN, JOHN |