Patent abstract: "Al-cu-li alloy plate processing process, improving formability and corrosion resistance". The invention relates to the process of manufacturing a 0.5 to 10 mm thick aluminum alloy base product laminate, notably comprising copper and lithium, in which, after solution and quenching, a treatment is carried out. short thermal temperature in which the plate reaches a temperature of 145 to 175 ° C for 0.1 to 45 minutes, the heating speed being between 3 and 600 ° C / min. The sheet obtained at the end of the process according to the invention has a high corrosion resistance and is able to be formed into an airplane frame element, notably an airplane fuselage cover.
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