Process for producing superplastic aluminum alloy strips
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United States of America Patent
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Jul 30, 1985
Grant Date -
N/A
app pub date -
Mar 28, 1983
filing date -
Jul 30, 1981
priority date (Note) -
Expired
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Abstract
Process for producing superplastic aluminum alloy strips comprising continuously casting and rolling a molten aluminum alloy containing 4.0 to 6.0% (by weight) of magnesium, 0.4 to 1.5% (by weight) of manganese, 0.05 to 0.2% (by weight) of chromium and less than 0.50% (by weight) of silicon, thereby preparing a cast strip of 3 to 20 mm in thickness, after subjecting the cast strip to annealing treatment at a temperature of 420.degree. to 530.degree. C., subjecting the annealed strip to the former step of cold rolling and intermediate annealing and then subjecting the intermediately annealed strip to the latter step of cold rolling until the reduction ratio reaches to a value of not less than 60%.
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