Aluminum-alloy rolled sheet and production method therefor

Details Aluminum-alloy rolled sheet and production method therefor Aluminum-alloy rolled sheet and production method therefor

1987-09-08

1989-06-13

Dean, R.

Metal treatment

Compositions

Heat treating

148 127A, 148417, 148439, C22F 104

Patent

active

048389587

ABSTRACT:
A T4 tempered and straightened rolled sheet of the Al--Mg--Cu series aluminum-alloy which contains from 1.5 to 5.5% of Mg and from 0.18 to 1.5% of Cu as the essential alloying element, has excellent mechanical properties, an improved formability, of a non-generation of Luder's marks. After the T4 treatment and subsequent straightening, the sheet is subjected to heating to a temperature in the range of from 60.degree. to 360.degree. C., at a heating rate falling within the hatched region of FIG. 1 attached herewith, then holding within the hatched region of FIG. 2 attached herewith, and subsequently, cooling at a cooling rate falling within the hatched region of FIG. 1.

REFERENCES:
patent: 4186034 (1970-01-01), Akeret
patent: 4645544 (1987-02-01), Baba et al.

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