PROCESS FOR THE HEAT TREATMENT OF ALUMINUM ALLOY SHEETS, WITH A VIEW TO IMPROVING THEIR TENACITY, AND SHEET OBTAINED BY THIS PROCESS.

摘要

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 ANGSTROM and 1000 ANGSTROM . 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.