公开(公告)号：US20220349040A1

公开(公告)日：2022-11-03

申请号：US17778179

申请日：2020-11-30

Applicant: CONSTELLIUM ISSOIRE

Inventor： Helene GODIN ,  Erembert NIZERY

IPC: C22F1/057 ,  C22C21/18 ,  C22C21/16 ,  C22C21/14 ,  B21B3/00

Abstract: The invention relates to a method for manufacturing a thin sheet made from aluminum-based alloy comprising, as % by weight, 2.2 to 2.7% Cu, 1.3 to 1.6% Li, less than 0.1% Ag, 0.2 to 0.5% Mg, 0.1 to 0.5% Mn, 0.01 to 0.15% Ti, a quantity of Zn of less than 0.3, a quantity of Fe and of Si of less than or equal to 0.1% each, and unavoidable impurities with a content of less than or equal to 0.05% by weight each and 0.15% by weight in total, the remainder aluminum, wherein optionally the hot-rolling input temperature being between 400° C. and 460° C. and the hot-rolling output temperature being less than 300° C. and the mean heating speed during the solution heat treatment is at least approximately 17° C./min between 300° C. and 400° C., aging conditions such that the yield strength in the long-transverse direction Rp0.2 is between 350 and 380 MPa.