The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
Dec. 16, 2021
Constellium Issoire, Issoire, FR;
Melanie Ollat, Ruy-Montceau, FR;
Jean-Christophe Ehrstrom, Grenoble, FR;
C-TEC Constellium Technology Center, Voreppe, FR;
Abstract
A method for thermomechanical treatment of wrought products made of a 2000 series aluminum alloy comprising, in % by weight, Cu 3.5-5.8; Mg 0.2-1.5; Mn≤0.9; Fe≤0.15; Si≤0.15; Zr≤0.25; Ag≤0.8; Zn≤0.8; Ti 0.02-0.15; unavoidable impurities≤0.05 each and ≤0.15 total; remainder aluminum, enabling an improvement in the resistance to corrosion under stress. It includes a tempering consisting of two sequences. The first sequence is defined by a maximum temperature Tcomprised between 130° C. and 180° C. and by a hold time at a temperature comprised between 130° C. and 180° C. which equates to an equivalent duration tcalculated at 160° C. comprised between 10 h and 80 h. The second sequence is defined by a temperature T(t) lower than Tand a hold time tat a temperature comprised between 100° C. and 130° C., which equates to an equivalent time tcalculated at 160° C. such that t° comprised between 0.3% and 15% of the equivalent duration t° calculated for the first sequence.