Metal treatment – Compositions – Heat treating
Patent
1979-08-09
1987-04-21
Dean, R.
Metal treatment
Compositions
Heat treating
148 127A, 148417, C22F 104
Patent
active
046593934
ABSTRACT:
The invention relates to a process for the thermal treatment of aluminum alloys containing zinc, magnesium and copper as main alloying elements, and the products manufactured by this process and having an average particle diameter of Al--Mg--Cr phase of between 800 .ANG. and 1000 .ANG.. This process involves carrying out a treatment at high temperature for a sufficiently short period to prevent coalescense into particles which are too large. This treatment is preferably carried out at the homogenization stage for thin products and at the final dissolution stage for thick products. The invention is applied, in particular, to the manufacture of thin or thick sheets for the aeronautical industry.
REFERENCES:
patent: 3791880 (1974-02-01), Hunsicker et al.
patent: 4196021 (1980-04-01), Bouvaist et al.
Bouvaist Jean
Ferton Daniel
Dean R.
Societe de Transformation de l'Aluminium Pechiney
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