EP 2559779 B1 20160113 - High temperature Al-Cu-Mg-Ag alloy and method for producing a semi-finished product or product from such an aluminium alloy
Title (en)
High temperature Al-Cu-Mg-Ag alloy and method for producing a semi-finished product or product from such an aluminium alloy
Title (de)
Warmfeste Al-Cu-Mg-Ag-Legierung sowie Verfahren zur Herstellung eines Halbzeuges oder Produktes aus einer solchen Aluminiumlegierung
Title (fr)
Alliage d'Al-Cu-Mg-Ag résistant à la chaleur et procédé de fabrication d'un demi-produit ou d'un produit à partir d'un tel alliage d'aluminium
Publication
Application
Priority
EP 11177747 A 20110817
Abstract (en)
[origin: EP2559779A1] Heat resistant aluminum-copper-magnesium-silver alloy for producing semi-finished products or products suitable for applying at higher temperatures, and exhibiting high static and dynamic strength properties and an improved creep resistance, comprises (in wt.%) silicon (0.3-0.7), iron (not > 0.15), copper (3.5-4.7), manganese (0.05-0.5), magnesium (0.3-0.9), titanium (0.02-0.15), zirconium (0.03-0.25), silver (0.1-0.7), scandium (0.03-0.5), vanadium (0.03-0.2), other component (not > 0.05), and aluminum (remaining), where the total amount of other component is not > 0.15 wt.%. An independent claim is also included for producing the semi-finished product or a product of the aluminum alloy, comprising (a) casting a bar made of the alloy with a sufficient resolution of the elements comprising zirconium, scandium and vanadium, (b) homogenizing the cast bar at a temperature that is as close as possible below the melting temperature of the alloy for a time sufficient to obtain an uniform distribution of the alloy elements in the cast structure, preferably at 485-510[deg] C for 10-25 hours, (c) hot working the homogenized bar by extruding, forging including indirect extrusion and/or rolling at 280-470[deg] C, (d) solution annealing the extruded, forged and/or rolled semi-finished product at temperatures that are sufficiently high for curing the alloy elements uniformly distributed in the structure to be brought into solution, preferably at 480-510[deg] C for 30 minutes to 8 hours, (e) quenching the solution heat treated semi-finished product in water at a temperature between room temperature and 100[deg] C, or water-glycol mixtures at temperatures = 50[deg] C, where the water-glycol mixtures has 60% glycol, (f) compressing or stretching the semi-finished product by an amount that leads to a reduction of the internal stresses, which are formed during the quenching in cold quenching medium, preferably by 1-5%, and (g) thermosetting the quenched-, optionally cold compressed- or stretched semi-finished at temperatures that are adapted in the steps (a), (b) or (c) preferably 80-210[deg] C for 5-35 hours, preferably 10-25 hours.
IPC 8 full level
C22C 21/14 (2006.01); C22C 21/16 (2006.01); C22F 1/057 (2006.01)
CPC (source: EP US)
B22D 7/005 (2013.01 - EP US); B22D 27/00 (2013.01 - EP US); C21D 1/60 (2013.01 - EP US); C22C 21/00 (2013.01 - EP US); C22C 21/14 (2013.01 - EP US); C22C 21/16 (2013.01 - EP US); C22F 1/057 (2013.01 - EP US)
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
DOCDB simple family (publication)
EP 2559779 A1 20130220; EP 2559779 B1 20160113; BR 112014001323 A2 20170418; CA 2843325 A1 20130221; CA 2843325 C 20190423; CN 103748246 A 20140423; CN 103748246 B 20160817; ES 2565482 T3 20160405; US 10240228 B2 20190326; US 2014166161 A1 20140619; WO 2013023907 A1 20130221
DOCDB simple family (application)
EP 11177747 A 20110817; BR 112014001323 A 20120801; CA 2843325 A 20120801; CN 201280040155 A 20120801; EP 2012064982 W 20120801; ES 11177747 T 20110817; US 201214234981 A 20120801