Method of producing complex aluminum alloy parts of high temper,

Details Method of producing complex aluminum alloy parts of high temper, Method of producing complex aluminum alloy parts of high temper,

1976-07-26

1978-03-07

Stallard, W.

Metal treatment

Compositions

Heat treating

148125, C22D 104

Patent

active

040778134

ABSTRACT:
Fully annealed aluminum sheet is first stretch formed to the complex, doubly compound shape of a previously prepared forming die, e.g., an ejection seat blowout panel of a shuttlecraft. The part is then marked with a series of grid lines for monitoring later elongation. Thereafter it is solution heat treated and refrigerated to retard hardening. While still soft, it is stretched a second time on the same die to induce a modicum of work hardening, after which it is aged to the desired stress corrosion resistant temper, perferrably the T8 level, to provide the desired hardness and stress corrosion resistance.

REFERENCES:
patent: 1472738 (1923-10-01), Archer et al.
patent: 2446166 (1948-08-01), Eades
patent: 2736674 (1956-02-01), Harmon
patent: 3113052 (1963-12-01), Schneck
patent: 3172787 (1965-03-01), Martenet
patent: 3184349 (1965-05-01), Burwen

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