公开(公告)号：US12091735B2

公开(公告)日：2024-09-17

申请号：US16973920

申请日：2019-06-03

申请人： ALERIS ROLLED PRODUCTS GERMANY GMBH

发明人： Nele Mareike Knaack ,  Bernd Jacoby ,  Achim Bürger ,  Otmar Martin Müller

IPC分类号： C22F1/047 ,  C22C21/08

CPC分类号： C22F1/047 ,  C22C21/08 ,  C22C2202/00

摘要： The invention relates to a method of manufacturing an Al—Mg—Mn aluminium alloy plate product having a final gauge in the range of 3 mm or more, the method comprising the steps of: (a) providing a rolling feedstock material of an aluminium alloy having a composition comprising of Mg 3.5-5.3% and Mn 0.20-1.2%; (b) preheating and/or homogenisation; (c) hot rolling of the rolling feedstock to a rolled final gauge; (d) a first cold working operation selected from the group consisting of (i) stretching in a range of 3% to 20%, and (ii) cold rolling with a cold rolling reduction in a range of 5% to 25%; (c) annealing of the cold worked plate at a temperature in a range of 200° C. to 280° C.; (f) a second cold working operation selected from the group consisting of (i) stretching in a range of 0.4% to 3%, and (ii) cold rolling with a cold rolling reduction in a range of 0.5% to 5%.