EP 0081441 B1 19851030 - METHOD OF MANUFACTURING PRODUCTS FROM HIGH-STRENGTH ALLOYS OF THE AL-ZN-MG-CU TYPE AND WITH TRANSVERSE DIRECTION TOUGHNESS
Title (en)
METHOD OF MANUFACTURING PRODUCTS FROM HIGH-STRENGTH ALLOYS OF THE AL-ZN-MG-CU TYPE AND WITH TRANSVERSE DIRECTION TOUGHNESS
Publication
Application
Priority
FR 8122969 A 19811203
Abstract (en)
[origin: EP0081441A1] 1. A method of producing hot extruded products of the type Al-Zn-Mg-Cu, which, in the treated state, has improved transverse characteristics, characterised by casting an alloy of the following composition (% by weight) : Si =< 0.08 Cu 1.0 to 2.0 Mg 2.1 to 3.5 Zn 7.2 to 9.5 Cr 0.07 to 0.17 Mn 0.15 to 0.25 Zr 0.08 to 0.14 Ti =< 0.10 Others each =< 0.05 Others total =< 0.15 Balance = Al and iron homogenizing the cast product in the range of temperatures of from 460 degrees C to the initial melting temperature of the alloy, hot extruding the product at a temperature of the order of 400 degrees C, optionally hot drawing the hot extruded product, putting the product into solution in the range of temperatures of from 460 to 490 degrees C, quenching the product in cold water (omicron =< 40 degrees C), cold working with a level of deformation (S - s/s) =< 10%, and a tempering operation : type T6 : that is to say, from 6 to 50 hours at from 115 to 150 degrees C, or type T7 : that is to say, from 3 to 24 hours at from 100 to 120 degrees C + 8 to 20 hours at from 150 to 170 degrees C, the longest periods of time generally being associated with the lowest temperatures.
IPC 1-7
IPC 8 full level
C22C 21/10 (2006.01); C22F 1/00 (2006.01); C22F 1/04 (2006.01); C22F 1/053 (2006.01)
CPC (source: EP)
C22F 1/053 (2013.01)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0081441 A1 19830615; EP 0081441 B1 19851030; AT E16292 T1 19851115; CA 1206354 A 19860624; DE 3267187 D1 19851205; DK 158317 B 19900430; DK 158317 C 19901001; DK 534982 A 19830604; FR 2517702 A1 19830610; FR 2517702 B1 19851115; IE 54132 B1 19890621; IE 822870 L 19830603; JP S58113358 A 19830706; JP S6127458 B2 19860625; NO 155629 B 19870119; NO 155629 C 19870429; NO 824043 L 19830606; ZA 828873 B 19830928
DOCDB simple family (application)
EP 82420168 A 19821201; AT 82420168 T 19821201; CA 416870 A 19821202; DE 3267187 T 19821201; DK 534982 A 19821202; FR 8122969 A 19811203; IE 287082 A 19821202; JP 21119082 A 19821201; NO 824043 A 19821202; ZA 828873 A 19821202