Cegedur Societe De Transformation De L'aluminium Pechiney

Societe De Vente De L'aluminium Pechiney

Societe De Transformation De L'aluminium Pechiney

Daniel Ferton

Jean Marie Bouvaist

Robert Mace

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.

Process for the thermal treatment of aluminum alloy sheets

The invention concerns a process for improving the characteristics in respect of fatigue strength and toughness of worked Al alloys in the treated state, by means of a thermo-mechanical treatment which is carried out on the cast and possibly homogenized product. It comprises the following steps:

Process for improving both fatigue strength and toughness of

The invention relates to a method for interrupted quenching of aluminum alloys with structural hardening. It comprises, starting from solution annealing:

Method for interrupted hardening of aluminum-base alloys

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 A and 1000 A. 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.

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Grenoble, France

Daniel Ferton