Patent ID: 9555504
Date: 2017-01-31
CPC Classifications: B23K,C21D,C22C,C22F

Claim:
1. A welded assembly obtained by a method comprising: i) obtaining at least a first aluminum alloy part in a solution heat treated, quenched, optionally cold worked, and naturally aged at ambient temperature and/or pre-aged temper, and at least a second aluminum alloy part, (ii) welding said parts to obtain a welded assembly having a welded zone, (iii) cold working the entire welded zone of said welded assembly from 0.3% to 5%, and (iv) post-weld aging the cold worked welded assembly to obtain a final metallurgical temper wherein said post-weld aging is performed from 120° C. to 200° C. for 10 to 60 hours, and wherein the corrosion resistance according to the Mastmaasis test, performed in accordance with standard ASTM G85 A2 is at least EA, and without the presence of intergranular corrosion throughout the entire welded zone.