EP 1143027 B1 20080611 - Process for making avionic structural elements from an Al-Si-Mg alloy
Title (en)
Process for making avionic structural elements from an Al-Si-Mg alloy
Title (de)
Verfahren zur Herstellung von Flugzeugstrukturelementen aus Al-Si-Mg-Legierung
Title (fr)
Procédé de fabrication d'éléments de structure d'avions en alliage d'aluminium Al-Si-Mg
Publication
Application
Priority
FR 0004456 A 20000407
Abstract (en)
[origin: EP1143027A1] A method for the fabrication of aircraft structural elements from an aluminium alloy comprises the casting of a preformer with a specific composition, the hot, and possibly cold, transformation of this preformer to obtain a product, putting this product into solution at between 540 and 570 degrees C, annealing the product, the production of the structural element by forming and possibly welding and tempering the structural element, in one or more stages, at 175 degrees C for a time expressed in hours of between (-160+57 gamma ) and (-184+ 69 gamma ), where gamma is the sum of the % composition by weight of Si + 2Mg + 2Cu. The composition of the aluminium alloy is 0.7-1.3% Si, 0.6-1.1% Mg, 0.5-1.1% Cu, 0.3-0.8% Mn, less than 15 Zn, less than 0.3% Fe, less than 0.20% Zr, less than 0.25% Cr, with other elements each less than 0.05% and less than 0.15% in total, the rest being aluminium. An Independent claim is included for the aircraft structural fuselage element fabricated by this method.
IPC 8 full level
C22F 1/05 (2006.01); C22C 1/08 (2006.01); C22F 1/057 (2006.01)
CPC (source: EP US)
C22F 1/05 (2013.01 - EP US); C22F 1/057 (2013.01 - EP US)
Citation (examination)
- EP 0787217 A1 19970806 - PECHINEY RHENALU [FR]
- R. DIF ET AL.: "6056-T78: A Corrosion Resistant Copper-rich 6XXX Alloy For Aerospace Applications", ALUMINUM ALLOYS, PROCEEDINGS OF ICAA-6, vol. 3, 1998
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1143027 A1 20011010; EP 1143027 B1 20080611; DE 60134357 D1 20080724; FR 2807449 A1 20011012; FR 2807449 B1 20021018; US 2002014290 A1 20020207
DOCDB simple family (application)
EP 01420078 A 20010403; DE 60134357 T 20010403; FR 0004456 A 20000407; US 82628901 A 20010405