Global Patent Index - EP 2559779 A1

EP 2559779 A1 20130220 - 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

EP 2559779 A1 20130220 (DE)

Application

EP 11177747 A 20110817

Priority

EP 11177747 A 20110817

Abstract (en)

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.

Abstract (de)

Beschrieben ist eine warmfeste Al-Cu-Mg-Ag-Legierung zur Herstellung von Halbzeugen oder Produkten, geeignet für die Anwendung bei höheren Temperaturen, mit hohen statischen und dynamischen Festigkeitseigenschaften in Verbindung mit einer verbesserten Kriechbeständigkeit enthaltend: - 0,3 - 0,7 %Gew. - % Silizium (Si) - max. 0,15 Gew. - % Eisen (Fe) - 3,5 - 4,7 Gew. - % Kupfer (Cu) - 0,05 - 0,5 Gew. - % Mangan (Mn) - 0,3 - 0,9 Gew. - % Magnesium (Mg) - 0,02 - 0,15 Gew. - % Titan (Ti) - 0,03 - 0,25 Gew. - % Zirkon (Zr) - 0,1 - 0,7 Gew. - % Silber (Ag) - 0,03 - 0,5 Gew. - % Scandium (Sc) - 0,03 - 0,2 Gew. - % Vanadium (V) - max. 0,05 Gew. - % andere, einzeln - max. 0,15 Gew. - % andere, insgesamt - Rest Aluminium. Beschrieben ist ferner ein Verfahren zur Herstellung eines Halbzeuges oder Produktes aus der vorgenannten Aluminiumlegierung.

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)

Citation (applicant)

  • EP 1518000 B1 20050831 - FUCHS FA OTTO [DE]
  • "International Alloy Designations and Chemical Composition Limits for Wrought Aluminium and Wrought Aluminium Alloys", April 2006, THE ALUMINUM ASSOCIATION INC.

Citation (search report)

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

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