Method of manufacturing aluminum alloy sheets excellent in hot f

Details Method of manufacturing aluminum alloy sheets excellent in hot f Method of manufacturing aluminum alloy sheets excellent in hot f

1985-06-25

1987-10-13

Dean, Richard O.

Metal treatment

Compositions

Heat treating

148 127A, C22F 104

Patent

active

046996737

ABSTRACT:
A method of manufacturing an aluminum alloy sheet excellent in hot formability. A hot rolled plate of an aluminum alloy is cold rolled into a cold rolled sheet with a reduction ratio of at least 20%. The cold rolled sheet thus obtained is subjected to intermediate heat treatment wherein it is heated to a temperature of 420.degree. to 560.degree. C., at a heating rate of at least 2.degree. C. per second while it is heated from 150.degree. to 350.degree. C., and the sheet is then cooled to room temperature, at a cooling rate of at least 1.degree. C. per second while it is cooled from 420.degree. to 150.degree. C. The resulting heat treated sheet is subjected to final cold rolling with a reduction ratio of 15 to 60%.

REFERENCES:
Aluminum Standards and Data 1984, Eighth Edition, Dec. 1984, pp. 53-58, Aluminum Association, Inc.
Aluminum, vol. III, Fabrication and Finishing, edited by Van Horn, 1967, pp. 326-330, American Society for Metals.

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