EP 0008996 B1 19811007 - PROCESS FOR HEAT-TREATING ALUMINIUM-COPPER-MAGNESIUM-SILICON ALLOYS
Title (en)
PROCESS FOR HEAT-TREATING ALUMINIUM-COPPER-MAGNESIUM-SILICON ALLOYS
Publication
Application
Priority
FR 7826371 A 19780908
Abstract (en)
[origin: ES483945A1] A process for the thermal treatment of wrought products made of an aluminum alloy of the 2000 series comprising by weight from 3.5 to 5% copper, from 0.2 to 1% magnesium, from 0.25 to 1.2% silicon, with a Si to Mg ratio greater than 0.8 comprising solution heat treatment, quenching treatment, ageing and tempering wherein the tempering treatment comprises at least two stages: (1) a main tempering treatment at a temperature higher than 225 DEG C. and lower than 280 DEG C. lasting between 6 seconds and 60 minutes and (2) a complementary tempering treatment at a temperature between 120 DEG and 175 DEG C. lasting between 4 and 192 hours. This process allows the compromise between the mechanical tensile characteristics and the resistance to intercrystalline and stress corrosion to be improved.
IPC 1-7
IPC 8 full level
C22C 21/12 (2006.01); C22F 1/00 (2006.01); C22F 1/04 (2006.01); C22F 1/057 (2006.01)
CPC (source: EP US)
C22F 1/057 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL SE
DOCDB simple family (publication)
EP 0008996 A1 19800319; EP 0008996 B1 19811007; BE 878673 A 19800307; CA 1139645 A 19830118; DE 2960938 D1 19811217; ES 483945 A1 19800416; FR 2435535 A1 19800404; FR 2435535 B1 19810703; IL 58190 A0 19791230; IL 58190 A 19820930; IT 1122979 B 19860430; IT 7925497 A0 19790905; JP S5541996 A 19800325; JP S59145765 A 19840821; JP S59145766 A 19840821; JP S6246621 B2 19871002; JP S6326191 B2 19880528; JP S6362581 B2 19881202; US 4323399 A 19820406
DOCDB simple family (application)
EP 79420041 A 19790905; BE 197062 A 19790907; CA 335270 A 19790907; DE 2960938 T 19790905; ES 483945 A 19790906; FR 7826371 A 19780908; IL 5819079 A 19790906; IT 2549779 A 19790905; JP 11470979 A 19790906; JP 838584 A 19840120; JP 838684 A 19840120; US 6908879 A 19790823