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1. WO2013054013 - IMPROVED METHOD FOR PROCESSING SHEET METAL MADE OF AN AL-CU-LI ALLOY

Publication Number WO/2013/054013
Publication Date 18.04.2013
International Application No. PCT/FR2012/000414
International Filing Date 12.10.2012
IPC
C22C 21/12 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
C22C 21/16 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
16with magnesium
C22F 1/057 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04of aluminium or alloys based thereon
057of alloys with copper as the next major constituent
CPC
C22C 21/12
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
C22C 21/14
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
14with silicon
C22C 21/16
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
16with magnesium
C22C 21/18
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
21Alloys based on aluminium
12with copper as the next major constituent
18with zinc
C22F 1/002
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
1Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
002by rapid cooling or quenching; cooling agents used therefor
C22F 1/057
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
1Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04of aluminium or alloys based thereon
057of alloys with copper as the next major constituent
Applicants
  • CONSTELLIUM FRANCE [FR]/[FR]
Inventors
  • BES, Bernard
  • EBERL, Frank
Agents
  • BUTRUILLE Jean-Rémi
Priority Data
11/0315514.10.2011FR
61/547,28914.10.2011US
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) IMPROVED METHOD FOR PROCESSING SHEET METAL MADE OF AN AL-CU-LI ALLOY
(FR) PROCÉDÉ DE TRANSFORMATION AMÉLIORÉ DE TÔLES EN ALLIAGE AL-CU-LI
Abstract
(EN) The invention relates to a method for manufacturing a rolled product, in particular for the aeronautical industry, containing an aluminum alloy having a composition of 2.1 to 3.9 wt % of Cu, 0.7 to 2.0 wt % of Li, 0.1 to 1.0 wt % of Mg, 0 to 0.6 wt % of Ag, 0 to 1 wt % of Zn, at most 0.20 wt % of Fe + Si, at least one element selected from Zr, Mn, Cr, Se, Hf and Ti, the quantity of said element, if selected, being 0.5 to 0.18 wt % for Zr, 0.1 to 0.6 wt % for Mn, 0.05 to 0.3 wt % for Cr, 0.02 to 0.2 wt % for Se, 0.05 to 0.5 wt % for Hf, and 0.01 to 0.15 wt % for Ti, the other elements constituting at most 0.05 wt % each and 0.15 wt % total, the remainder being aluminum, said method involving flattening and/or pulling with a total deformation of at least 0.5% and less than 3%, and a short heat treatment in which the sheet metal reaches a temperature of between 130 and 170ºC for 0.1 to 13 hours. The invention makes it possible, in particular, to simplify the process for shaping sheet metal for fuselages, and to improve the trade-off between static mechanical strength and damage tolerance properties.
(FR) L'invention concerne un procédé de fabrication d'un produit laminé notamment pour l'industrie aéronautique à base d'alliage d'aluminium de composition 2,1 à 3,9 % en poids de Cu, 0,7 à 2.0 % en poids de Li, 0,1 à 1,0 % en poids de Mg, 0 à 0,6 % en poids d'Ag, 0 à 1% % en poids de Zn, au plus 0,20 % en poids de Fe + Si, au moins un élément choisi parmi Zr, Mn, Cr, Se, Hf et Ti, la quantité dudit élément, s'il est choisi, étant 0,05 à 0,18 % en poids pour Zr, 0,1 à 0,6% en poids pour Mn, 0,05 à 0,3 % en poids pour Cr, 0,02 à 0,2 % en poids pour Se, 0,05 à 0,5 % en poids pour Hf et de 0,01 à 0,15 % en poids pour Ti, les autres éléments au plus 0,05% en poids chacun et 0,15% en poids au total, le reste aluminium, dans lequel, on réalise notamment un planage et/ou une traction avec une déformation cumulée d'au moins 0,5% et inférieure à 3%, et un traitement thermique court dans lequel la tôle atteint une température comprise entre 130 et 170°C pendant 0, 1 à 13 heures. L'invention permet notamment de simplifier le procédé de mise en forme des tôles de fuselage et d'améliorer le compromis de propriété entre résistance mécanique statique et tolérance aux dommages.
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