Aluminum alloy sheet with good forming workability and method fo

Details Aluminum alloy sheet with good forming workability and method fo Aluminum alloy sheet with good forming workability and method fo

1984-02-23

1988-06-28

Dean, R.

Metal treatment

Compositions

Heat treating

148 115A, 148 127A, 148417, 148439, C22F 104

Patent

active

047536853

ABSTRACT:
Disclosed herein are: (1) a formable bake-hardening type aluminum alloy sheet, containing 0.2-0.7 wt % of Fe, 0.05-0.5 wt % of Cu, 0.5-2.5 wt % of Mg, 0.5-2.0 wt % of Mn and optionally 0.05-1 wt % of Zn under the condition of Fe wt % +(Mn wt %.times.1.07)+(Mg wt %.times.0.27).ltoreq.3.0, and intermetallic compounds of less than 45 microns in size and an areal rate of 0.5-5% as observed from the surface of a rolled sheet and an average crystal grain width smaller than 25 microns; and (2) a method for producing such bake-hardening type aluminum alloy sheets.

REFERENCES:
patent: 4282044 (1981-08-01), Robertson et al.
patent: 4431461 (1984-02-01), Hoshino et al.

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