EP 4263892 A1 20231025 - WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME
Title (en)
WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME
Title (de)
KNETPRODUKTE AUS 2XXX-LEGIERUNG MIT OPTIMIERTER KORROSIONSBESTÄNDIGKEIT UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
PRODUITS CORROYES EN ALLIAGE 2XXX PRESENTANT UNE RESISTANCE A LA CORROSION OPTIMISEE ET PROCEDE D'OBTENTION
Publication
Application
Priority
- FR 2013653 A 20201218
- FR 2021052370 W 20211216
Abstract (en)
[origin: WO2022129806A1] Method for thermomechanical treatment of wrought products made of 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 in total; remainder aluminum, enabling an improvement in the stress corrosion resistance. It comprises a tempering consisting of two sequences. The first sequence is defined by a maximum temperature T1max between 130°C and 180°C and by a hold time at a temperature between 130°C and 180°C which equates to an equivalent time (formula i) calculated at 160°C between 10 h and 80 h. The second sequence is defined by a temperature T2°c (t) below T1max and a hold time t2 at a temperature between 100°C and 130°C, which equates to an equivalent time (formula ii) calculated at 160°C such that (formula iii) is between 0.3% and 15% of the equivalent time (formula iv) calculated for the first sequence.
IPC 8 full level
C22C 21/16 (2006.01); C22C 1/02 (2006.01); C22F 1/057 (2006.01)
CPC (source: EP US)
C22C 21/14 (2013.01 - US); C22C 21/16 (2013.01 - EP US); C22C 21/18 (2013.01 - US); C22F 1/002 (2013.01 - US); C22F 1/057 (2013.01 - EP US); C22C 1/026 (2013.01 - EP)
Citation (search report)
See references of WO 2022129806A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022129806 A1 20220623; CA 3203686 A1 20220623; CN 116568851 A 20230808; DE 21854746 T1 20240111; EP 4263892 A1 20231025; ES 2970033 T1 20240524; FR 3118065 A1 20220624; FR 3118065 B1 20231110; US 2024035137 A1 20240201
DOCDB simple family (application)
FR 2021052370 W 20211216; CA 3203686 A 20211216; CN 202180083196 A 20211216; DE 21854746 T 20211216; EP 21854746 A 20211216; ES 21854746 T 20211216; FR 2013653 A 20201218; US 202118254386 A 20211216