Method of manufacturing sheets, strips and foils from age harden

Details Method of manufacturing sheets, strips and foils from age harden Method of manufacturing sheets, strips and foils from age harden

1977-12-22

1979-11-13

Dean, R.

Metal treatment

Compositions

Heat treating

148 115A, 148 127A, C22F 104

Patent

active

041742320

ABSTRACT:
A method of manufacture of sheets, strips and foils with high mechanical strength, good deformability, and very little formation of ears, from age hardenable aluminum alloys of the Al-Si-Mg type by continuous casting or strip casting and hot and cold rolling, characterized in that an Al-Mg-Si-alloy is employed, which contains an insoluble excess of silicon at a temperature of 450.degree. to 550.degree. C. usual for homogenization annealing for this type of alloy, this excess remaining in defined finely dispersed form in the matrix, when the alloy is subjected to such a heat treatment; the alloy having preferably a composition corresponding to the area A-B-C-D-A of FIG. 1 of the accompanying drawings, where A=1% Si/0.6% Mg (weight percent), B=1.8% Si/0.6% Mg, C=1.8% Si/0.2% Mg and D=1.2% Si/0.2% Mg, with facultatively additions of a maximum of 0.3% each of chromium, manganese, zirconium and/or titanium.

REFERENCES:
patent: 3032448 (1962-05-01), Siebel et al.
patent: 3392062 (1968-07-01), Altenpohl et al.

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