The invention relates to a novel aluminium-copper-lithium alloy product and to methods for producing same. The product is a rolled product having a final thickness of 15 mm to 50 mm and having a composition, in wt. %, of Cu: 2.3–2.7; Li: 1.3–1.7; Mg: 0.2–0.5; Mn: 0.2–0.5; Ag: 0–0.1; Zn: < 0.20; Ti: 0.01–0.15; Zr: < 0.07; Fe: ≤ 0.1; Si: ≤ 0.1; other elements: ≤ 0.05 each and ≤ 0.15 in total, the remainder being aluminium, and such that the sum of the volume fraction of the texture components Cube {001} <100>, Goss {011} <100> and CG26.5 {021} <100> at mid-thickness is less than or equal to 7.5%. The product can be produced by hot rolling so that the thickness reduction of each of the last two passes is less than or equal to 10 mm, and wherein the final hot rolling temperature is between 400°C and 440°C.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
2.
METAL SHEET FOR A CONTAINER FOR GRANULAR MATERIALS
The invention relates to a method for manufacturing an abrasion-resistant rolled product made of 6XXX-series aluminium alloy, wherein, after hot rolling and cooling to room temperature, the rolled product made of aluminium alloy is not subjected to a solution treatment/quenching, and is not embossed with a raised pattern. The invention also relates to a container for granular materials comprising an abrasion-resistant rolled product obtained by means of the method according to the invention and to the method for manufacturing a container for granular materials. The invention makes it possible to obtain an improved rolled product made of abrasion-resistant aluminium alloy that has satisfactory mechanical properties for this application and a cost-effective manufacturing process.
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
C22F 1/05 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
B60P 1/00 - Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
B60R 13/01 - Liners for load platforms or load compartments
3.
ALUMINUM-COPPER-LITHIUM ALLOY PRODUCT FOR UNDERWING ELEMENT HAVING IMPROVED PROPERTIES
The present invention relates to a rolled product with a thickness of between 15 and 50 mm which is made of aluminum alloy having the following composition, in % by weight: Cu: 2.3 – 2.7; Li: 1.3 - 1.7; Mg: 0.2 - 0.5, Mn: 0.2 – 0.5; Ag: 0 – 0.1; Zn: < 0.20; Ti: 0.01 – 0.15; Zr < 0.07; Fe: < 0.1; Si: < 0.1; other elements < 0.05 each and < 0.15 in total, the remainder being aluminum, wherein the phases having an equivalent diameter of 35 to 500 nm have a mean equivalent diameter of less than or equal to 100 nm. The products according to the invention are obtained by a method in which, in particular, the hot working conditions are such that the final hot working temperature is at least 400°C and that the solution heat treatment of the product comprises a step of at least 15 minutes and less than 8 hours between 540°C and 580°C.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
4.
VERTICAL SEMI-CONTINUOUS CASTING DEVICE AND METHOD FOR MANUFACTURING ALUMINIUM ALLOYS
The invention relates to a vertical semi-continuous casting method with direct cooling of a raw form (5) made of aluminium alloy, such as a rolling plate or an extrusion billet, using a device comprising: an open-ended mould (1) made from at least one hollow element defining at least one peripheral chamber (12) having a solid inner wall (13) which is intended to come into contact with the aluminium alloy and allowing the circulation of a first cooling liquid capable of performing primary cooling; a plurality of spray nozzles (21) integrated into at least one spray bar (2) which is independent of the mould and is capable of performing secondary cooling, independent of the primary cooling, by spraying a second cooling liquid; a false bottom (3), capable of closing the lower portion of the mould at the start of the casting, having an upper portion (31) intended to come into contact with the aluminium alloy and a lower portion (32); and a descender (4) capable of gradually lowering the false bottom during the solidification of the raw form. The method and the device according to the invention solve the problem of distortion when starting the casting process.
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
B22D 11/049 - Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
The invention relates to a part of battery box for electric or hybrid heavy motor vehicles made from an aluminum alloy plate having a thickness from 6 to 15 mm, wherein said aluminum alloy comprises 4.0 to 5.3 wt.% of Mg, 0.4 to 1.2 wt.% of Mn, 0.5 wt.% or less of Si, 0.5 wt.% or less of Fe, 0.3 wt.% or less of Cu, 0.3 wt.% or less of Cr, 0.5 wt.% or less of Zn, 0.2 wt.% or less of Ti, rest aluminum and unavoidable impurities up to 0.05 wt.% each and 0.15 wt.% total, wherein the plate is in a strain-hardened and partially annealed temper H2X or a stabilized temper H3X. The part of battery box according to the invention exhibit a good balance between, intrusion and corrosion properties.
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
H01M 50/233 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by physical properties of casings or racks, e.g. dimensions
H01M 50/24 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
H01M 50/249 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders specially adapted for aircraft or vehicles, e.g. cars or trains
The invention relates to a rolled product which has an improved Rp0.2 (L) – K1c (L-T) compromise, the thickness of which is between 25 mm and 50 mm, and which is made of aluminium alloy with the following composition by weight: - Cu 2.2-3.9 - Li 0.7-1.2 - Mg 0.1-0.8 - Mn 0.1-0.6 - Zr 0.07-0.15 - Ti 0.01-0.15 - Fe <0.1 - Si <0.1% - Ag ≤ 0.40 - Zn ≤ 0.70, other elements <0.05 each and <0.15 in total, the remainder being aluminium, such that, at mid-thickness, the volume fraction of the grains having a brass texture is less than 21%. This product is obtained by a method comprising a step of casting, homogenising, hot rolling, solution heat treating, quenching, and tempering such that, during the hot rolling step, the outlet temperature is between 395 and 445°C.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
7.
METHOD FOR SUSTAINABLY RECYCLING ALUMINIUM ALLOY SCRAP
The invention relates to a method for remelting coated aluminium alloy scrap in an induction furnace having a cylindrical crucible, which comprises steps of supplying crushed coated scrap, delacquering, charging, remelting and holding the crushed coated aluminium alloy scrap, such that at least 50% of the individual entities of the crushed coated scrap have a particle size of between 5 and 25 mm, and a flatness of less than or equal to 10 mm, and wherein the induction furnace is inerted during the charging phase, and wherein the inert gas outlet is located in the quarter of the circular section of the furnace containing the delimited zone in which the scrap falls.
The present invention relates to wrought 7xxx aluminum alloy product comprising in weight % Zn 6.7 – 7.4, Mg 1.35 – 1.75, Cu 1.85 – 2.35, Zr 0.04 – 0.14, Mn 0 – 0.5, Ti 0 – 0.15, V 0 – 0.15, Cr 0 – 0.25, Fe ≤0.05, Si≤0.05 with a Fe+Si ≤ 0.08 % and artificially aged wherein the total equivalent aging time t(eq) at 155°C is comprised from 24 hours to 45 hours which permits to optimize the compromise between tensile yield strength and toughness with improved cryogenic fracture toughness and fatigue resistance in corrosive environment.
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
9.
METHOD FOR CHARACTERISING THE POROSITY OF A PLATE BY MEANS OF HIGH-RESOLUTION ULTRASOUND SCANNING
The invention relates to a method for characterising the porosity of an aluminium alloy plate, the method comprising: a) applying a probe facing the plate; b) activating a transmitting transducer of the probe so that the transducer transmits an incident ultrasonic wave in the direction of the plate; c) detecting, by means of a detecting transducer of the probe, a detection signal that is representative of an ultrasonic wave reflected by the plate as a result of the incident wave; d) repeating steps a) to c) by moving the transmitting transducer and the transmitting transducer along mesh points on the surface; e) on the basis of the detection signals detected in each step c), characterising the porosity of the plate; wherein, in each step b), the acoustic wave is focused at a focusing depth of between 4 mm and 12 mm, and wherein step e) comprises: -e-i) accounting for a minimum amplitude; - e-ii) selecting the detection signals of which the amplitude is greater than the minimum amplitude; - e-iii) determining the presence of a defect (11) when at least one detection signal, corresponding to a point in the mesh, is selected in sub-step e-ii), and wherein sub-step e-iii) comprises determining the presence of a defect when at least two detection signals, corresponding to two adjacent mesh points, are selected in sub-step e-ii). -e-iv) at different points in the mesh, calculating a porosity density indicator, corresponding to a number of defects determined per unit area; - e-v) optionally determining an overall porosity density indicator for the plate according to the porosity density indicators calculated in sub-step e-iv).
The present invention relates to sheets with a thickness of between 6 and 25 mm made of aluminum alloy having the following composition, in % by weight: Zn: 4.5 - 7.0; Mg: 1.2 - 3.5; Cu: 1.0 - 3.0; at least one element chosen from Cr: 0.04 - 0.35, Zr: 0.04 - 0.15 and Mn: 0.04 - 0.5; Ti < 0.25; Fe < 0.6; Si < 0.5; other elements < 0.05 each and < 0.15 in total, remainder aluminum, and to the method for manufacturing same. The sheets according to the invention are particularly useful as precision sheets, in particular for producing machine frames, reference plates, transport tables, mounting jigs, and robot arms. The sheets according to the invention have an improved dimensional stability notably during machining steps, while having sufficient static mechanical properties, and good anodizability.
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
11.
METAL SHEETS, MADE OF ALUMINIUM ALLOY, FOR VACUUM CHAMBER ELEMENTS
The invention relates to a method for manufacturing a metal sheet having a final thickness of between 6 and 50 mm, the method comprising the steps of: casting a rolling slab made of aluminium alloy having the following composition in % by weight: Si: 0.6-1.3; Mg: 0.6-1.2; Mn: 0.65-1.0; Fe: 0.04-0.20; Cr ≤ 0.05; Ti ≤ 0.15; Cu ≤ 0.1; other elements < 0.05 each, and < 0.15 in total, the remainder being aluminium; homogenisation; hot rolling; cold rolling; solution heat treatment; quenching; stress-relieving by controlled stretching; and tempering. The products obtained by the method according to the invention are particularly useful for producing vacuum chamber elements because they have sufficient mechanical properties, improved dimensional stability for machining steps, and also optimal suitability for creating oxide layers having high chemical resistance.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for sheet metals
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/05 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
B01J 3/00 - Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matterApparatus therefor
The invention relates to a metal plate (10) for creating floors, particularly of industrial vehicles, over which trolleys are to run, said plate exhibiting on one side a plurality of patterns, each pattern comprising one or more projecting parts (20) referred to as profiled reliefs, said patterns being arranged periodically, in a discrete and ordered manner, the maximum height (Hmax) of said reliefs being between 0.2 and 1.5 mm, the plate comprising at least 18,000 reliefs per square metre. The invention also relates to the method for producing a plate according to the invention. Use of a plate of the invention to create a floor of a refrigerated vehicle is particularly advantageous.
E04F 15/02 - Flooring or floor layers composed of a number of similar elements
E04F 15/06 - Flooring or floor layers composed of a number of similar elements of metal, whether or not in combination with other material
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
13.
IMPROVED THIN SHEET MADE OF ALUMINIUM-COPPER-LITHIUM ALLOY
The invention relates to a thin sheet, the thickness of which is less than 12.7 mm, having an essentially recrystallised granular structure, made from an aluminium-based alloy comprising 2.5 to 3.5% by weight of Cu, 0.7 to 0.9% by weight of Li, 0.3 to 0.5% by weight of Mg, 0.2 to 0.5% by weight of Mn, 0.25 to 0.65% by weight of Zn, 0.01 to 0.15% by weight of Ti, 0 to 0.07% by weight of Ag, an amount of Fe and of Si of less than or equal to 0.1% by weight each, and inevitable impurities at a content of less than or equal to 0.05% by weight each and 0.15% by weight in total, with the remainder being aluminium.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
14.
METHOD FOR MELTING A CHARGE OF ALUMINIUM USING AN INDUCTION FURNACE
The invention relates to the method for melting a charge of aluminium, comprising: procuring a charge (11, 12, 13) of aluminium of which at least 15 wt% is in the form of a bowl (11) of essentially cylindrical shape, of height h and maximum diameter d; loading the charge into a cylindrical induction furnace (10) of height H and of maximum inside diameter D, where the height direction of the bowl is substantially parallel to the height direction of the furnace; melting the charge using induction to obtain a bath of liquid metal (2); and optionally adjusting the composition of the liquid metal where d is in the range 0.7D to 0.97D and preferably in the range 0.84D to 0.92D.
F27D 3/00 - ChargingDischargingManipulation of charge
F27D 11/06 - Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
The invention relates to a method for re-melting coated aluminium alloy scrap comprising a step of supplying coated ground aluminium alloy scrap consisting of individual entities; a stripping step; a step of preparing a heel; a step of loading and melting the stripped scrap on the heel. The invention is characterised in that the scrap has a specific geometry, wherein at least 50% of the individual entities of the coated ground scrap has a fold ratio (R) of less than or equal to 0.6, wherein the fold ratio (R) of an individual entity is defined by: fold ratio =R= (unfolded area - folded area)/(unfolded area), wherein the folded area is the maximum area of the orthogonal projection of the individual entity onto a plane and the unfolded area is the total area of the same individual entity after it has been unfolded.
The invention relates to a scrap remelting line comprising at least one storage silo configured to store scrap, at least two induction furnaces for remelting the scrap and obtaining the remelted liquid metal, a means for supplying the scrap to the at least two induction furnaces, at least one furnace receiving the liquid metal (6), and a means for transporting the remelted liquid metal (5, 15) to the receiving furnace. The invention also relates to the method for obtaining liquid metal from scrap remelted in induction furnaces.
The invention relates to a method for preheating at least one working roll for rolling, involving phases of: - determining a target thermal expansion profile, - determining an effective mean temperature profile of longitudinal segments of the working roll and for determining a target mean temperature profile; - activating a plurality of inductors distributed along the working roll in order to reduce a difference between the effective mean temperature and the target mean temperature.
B21B 27/10 - Lubricating, cooling, or heating rolls externally
B21B 37/32 - Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
18.
WROUGHT PRODUCTS MADE OF 2XXX ALLOY HAVING AN OPTIMIZED CORROSION RESISTANCE, AND METHOD FOR OBTAINING SAME
Method for thermomechanical treatment of wrought products made of 2000 series aluminum alloy comprising, in % by weight, Cu 3.5 - 5.8; Mg 0.2 - 1.5; Mn ≤ 0.9; Fe ≤ 0.15; Si ≤ 0.15; Zr ≤ 0.25; Ag ≤ 0.8; Zn ≤ 0.8; Ti 0.02-0.15; unavoidable impurities ≤ 0.05 each and ≤ 0.15 in total; remainder aluminum, enabling an improvement in the stress corrosion resistance. It comprises a tempering consisting of two sequences. The first sequence is defined by a maximum temperature T1maxbetween 130°C and 180°C and by a hold time at a temperature between 130°C and 180°C which equates to an equivalent time (formula i) calculated at 160°C between 10 h and 80 h. The second sequence is defined by a temperature T2°c(t) below T1max and a hold time t2 at a temperature between 100°C and 130°C, which equates to an equivalent time (formula ii) calculated at 160°C such that (formula iii) is between 0.3% and 15% of the equivalent time (formula iv) calculated for the first sequence.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
The invention relates to a sheet metal plate (10) for creating flooring (30), in particular for industrial vehicles, having on its upper surface (11) a plurality of raised patterns, each raised pattern comprising one or more protruding portions (20), the raised patterns being arranged periodically, discreetly and in orderly fashion, the height h of the raised patterns being between 0.3 and 3 mm, characterised in that the plate has, on its lower surface (12), which is intended to be bonded to a support member, a rough surface the roughness Rmax of which is between 10 µm and 250 µm. The invention also relates to the method of producing said plate and the use of said sheet metal plate for creating flooring for industrial vehicles, preferably flooring for refrigerated vehicles.
B21H 8/00 - Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects
B21B 27/00 - RollsLubricating, cooling or heating rolls while in use
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B44B 5/00 - Machines or apparatus for embossing decorations or marks, e.g. embossing coins
20.
USE OF PRODUCTS MADE FROM ALUMINIUM COPPER MAGNESIUM ALLOY THAT PERFORM WELL AT HIGH TEMPERATURE
The invention relates to the use of a wrought T8 aluminium alloy product with the following composition, in wt%, Cu: 3.6 – 4.4; Mg: 1.2 – 1.4; Mn: 0.5 – 0.8; Zr: ≤ 0.15; Ti: 0.01 – 0.15; Si ≤ 0.20; Fe ≤ 0.20; Zn ≤ 0.25; other elements < 0.05; the remainder being aluminium, in an application in which the product is kept at temperatures of between 80°C and 250°C for a significant period of at least 200 hours. The products intended for the use according to the invention are particularly useful in an application such as a rotor or another component of an air suction pump such as, in particular, a vacuum pump.
C22C 21/14 - Alloys based on aluminium with copper as the next major constituent with silicon
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
F04D 19/04 - Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
The invention relates to a process for manufacturing a thin sheet made of an aluminum-based alloy comprising, in percent by weight, 2.2 to 2.7% Cu,1.3 to 1.6% Li, less than 0.1% Ag, 0.2 to 0.5% Mg, 0.1 to 0.5% Mn, 0.01 to 0.15% Ti, less than 0.3% Zn, no more than 0.1% Fe and no more than 0.1% Si, and inevitable impurities at a content of no more than 0.05% by weight each and 0.15% by weight in total, the remainder being aluminum, wherein, in particular, the hot-rolling input temperature is between 400°C and 460°C and the hot-rolling output temperature is less than 300°C, the mean heating rate during the solution heat treatment is at least approximately 17°C/min between 300°C et 400°C, and the tempering conditions such as the 0.2% offset yield strength in the transverse direction Rp0.2(TL) ranges from 350 to 380 MPa. The sheets according to the invention have advantageous mechanical properties and are used in particular for manufacturing aircraft fuselage panels.
C22C 21/14 - Alloys based on aluminium with copper as the next major constituent with silicon
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
The present invention relates to plates with a thickness of between 8 and 50 mm made of aluminum alloy having the following composition, in % by weight: Si: 0.7 - 1.3; Mg: 0.6 - 1.2; Mn: 0.65 - 1.0; Fe: 0.05 - 0.35; at least one element chosen from Cr: 0.1 - 0.3 and Zr: 0.06 - 0.15; Ti < 0.15; Cu < 0.4; Zn < 0.1; other elements < 0.05 each and < 0.15 in total, remainder aluminum and to the method for manufacturing same. The plates according to the invention are particularly useful as precision plates, notably for the production of machine elements, for example assembly or control tools. The plates according to the invention have an improved dimensional stability notably during machining steps, while having sufficient static mechanical properties, and an excellent anodizability.
C22F 1/043 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/05 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
Device for degassing liquid metal comprising an enclosure containing a bath of liquid metal, a device for circulating a gas through a purification chamber and in that the purification chamber comprises a getter material configured to trap the dihyrogen of the circulating gas. Method for degassing a bath of liquid metal in order to reduce the hydrogen concentration of the liquid metal, comprising the following steps a) producing a bath of liquid metal, preferably an aluminum alloy, b) circulating a gas, c) exchanging hydrogen from the circulating gas with the liquid metal so that the hydrogen dissolved in the bath of liquid metal diffuses into the circulating gas and enriches the circulating gas in dihydrogen, d) purifying the circulating gas enriched in dihydrogen in a purification chamber comprising a getter material configured to trap the dihydrogen of the circulating gas.
The invention concerns a method for checking a damage tolerance property of a part made of aluminium alloy, comprising the following steps: - measuring at least one property representative of a tensile strength of the part; - using the property measured during step a) as input data (x,) of a neural network estimator; - estimating, using the estimator, the property representative of a tensile strength of the part; the method being characterised in that it comprises: - taking account of an acceptance threshold and comparing the property estimated during step c) with the acceptance threshold, taking into account a confidence interval; and - as a function of the comparison: - considering that the part satisfies the check; - or considering that the part does not satisfy the check.
The invention relates to a rolled aluminum-based alloy product having a thickness of at least 80 mm comprising, (in weight %) : Zn 6.85 – 7.25, Mg 1.55 – 1.95, Cu 1.90 – 2.30, Zr 0.04 – 0.10, Ti 0 – 0.15, Fe 0 – 0.15, Si 0 – 0.15, other elements ≤ 0.05 each and ≤ 0.15 total, remainder Al, wherein at mid-thickness more than 75 % of grains are recrystallized or at mid-thickness 30 to 75 % of grains are recrystallized and non- recrystallized grains have an aspect ratio in a L/ST cross section less than 3. A process for the manufacture of a rolled aluminum-based alloy product comprises the steps of: (a) casting an ingot made in an alloy according to the invention, (b) conducting an homogenization of the ingot (c) conducting hot rolling of said homogenized ingot in one or more stages by rolling, (d) conducting a solution heat treatment a quench, (e) conducting stress relieving, and, (f) conducting an artificial aging treatment. The products of the invention are suitable for aircraft construction and have advantageous fatigue crack growth properties.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
26.
METAL SHEET MADE OF HIGH-STRENGTH 2XXX ALLOY FOR AN AIRCRAFT FUSELAGE
The invention relates to a thin metal sheet which is made of an alloy based on substantially recrystallized aluminum and which has a thickness of 0.25 to 12 mm, the alloy comprising, in percent by weight, Cu 3.4-4.0; Mg 0.5–0.8; Mn 0.1–0.7; Fe ≤ 0.15; Si ≤ 0.15; Zr ≤ 0.04; Ag ≤ 0.65; Zn ≤ 0.5; inevitable impurities ≤ 0.05 each and ≤ 0.15 in total, the remainder consisting of aluminum. The invention also relates to a process for manufacturing such a metal sheet and to the use thereof as a fuselage panel or sheet metal for the production of composite products such as fiber metal laminates (FML) for wing or fuselage applications in the aeronautical industry.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
27.
ALMGMN ALLOY PRODUCT WITH IMPROVED CORROSION RESISTANCE
The invention relates to a method for manufacturing an aluminium alloy sheet, wherein an aluminium alloy is prepared with the following composition, in wt%: Mg: 4.0 - 5.2, Mn: 0.40 - 1.0, Zn: 0.15 - 0.40, at least one element selected from Ti, Cr, Cu and Zr, the content of the element, if selected, being 0.01 - 0.15 for Ti, 0.05 - 0.25 for Cr, 0.02 - 0.25 for Cu, 0.05 - 0.25 for Zr, Fe: < 0.40, Si: < 0.40, other elements or impurities < 0.05 each and < 0.15 in total, the remainder being aluminium. A rolling plate is cast by vertical semi-continuous casting, and said optionally homogenised plate is hot-rolled in two successive stages to obtain a sheet. The sheets obtained by the method according to the invention are advantageous, in particular for shipbuilding, since they demonstrate, after being exposed for 7 days to a temperature of 100°C, a weight loss of less than 15 mg/cm2 during a corrosion test according to the ASTM G67 standard.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
28.
PROCESS FOR MANUFACTURING A BIMETALLIC PART USING A DILATION-CAUSING THERMAL TREATMENT
The invention relates to a process for manufacturing a bimetallic part by means of a first component formed by a first aluminum alloy and a second component formed by a second aluminum alloy, said process involving the following steps: - assemble the first component and the second component so as to obtain an assembled part; - applying a thermal treatment to the assembled part at a temperature of 100 to 250°C, the thermal treatment causing the assembled part to deform, in particular as a result of a metallurgical deformation by a precipitation of hardening phases of the first component and/or the second component; - cooling the part to ambient temperature, upon which the part remains deformed. The disclosed process is characterized in that it involves, prior to the assembling step, an estimation of the degree of deformation that the assembled part will undergo under the effect of the thermal treatment.
C21D 9/50 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for welded joints
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
The invention concerns a method for manufacturing a thin sheet made of aluminium-based alloy comprising, in per cent by weight, 2.3 to 2.7% Cu,1.3 to 1.6% Li, 0.2 to 0.5% Mg, 0.1 to 0.5% Mn, 0.01 to 0.15% Ti, a quantity of Zn less than 0.3, a quantity of Fe and of Si less than or equal to 0.1% each, and unavoidable impurities at a content less than or equal to 0.05% by weight each and 0.15% by weight in total, wherein, in particular, the hot-rolling input temperature is between 400°C and 445°C and the hot-rolling output temperature is less than 300°C. The sheets according to the invention have advantageous mechanical properties and are used, in particular, for the manufacture of aircraft fuselage panels.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
30.
ALUMINIUM-COPPER-LITHIUM ALLOY HAVING IMPROVED COMPRESSIVE STRENGTH AND IMPROVED TOUGHNESS
The invention relates to a product based on an aluminium alloy comprising, as percentages by weight, 4.0 to 4.6% by weight of Cu, 0.7 to 1.2% by weight of Li, 0.5 to 0.65% by weight of Mg, 0.10 to 0.20% by weight of Zr, 0.15 to 0.30% by weight of Ag, 0.25 to 0.45% by weight of Zn, 0.05 to 0.35% by weight of Mn, at most 0.20% by weight of Fe + Si, at least one element selected from Cr, Sc, Hf, V and Ti, the amount of said element, if selected, being from 0.05 to 0.3% by weight for Cr and for Sc, 0.05 to 0.5% by weight for Hf and for V and 0.01 to 0.15% by weight for Ti, the other elements being at most 0.05% by weight each and 0.15% by weight in total, the remainder being aluminium. The invention also relates to a method for obtaining such a product and to the use thereof as an aircraft structural element.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
31.
METHOD FOR MANUFACTURING AN ALUMINUM-COPPER-LITHIUM ALLOY WITH IMPROVED COMPRESSIVE STRENGTH AND IMPROVED TOUGHNESS
The invention relates to a manufacturing method in which an alloy is prepared that comprises 3.5 to 4.7 wt% of Cu; 0.6 to 1.2 wt% of Li; 0.2 to 0.8 wt% of Mg; 0.1 to 0.2 wt% of Zr; 0.0 to 0.3 wt% of Ag; 0.0 to 0.8 wt% of Zn; 0.0 to 0.5 wt% of Mn; at most 0.20 wt% of Fe + Si; optionally an element selected from Cr, Sc, Hf and V, the amount of said element, if selected, being from 0.05 to 0.3 wt% for Cr and for Sc, 0.05 to 0.5 wt% for Hf and for V; the other elements being at most 0.05 wt% each and 0.15 wt% in total, a refiner is introduced, the alloy is cast in a crude form, homogenized, hot-worked, solution heat-treated, quenched, cold-worked, and tempered, in which the refiner contains particles of TiC and/or the cold working is between 8 and 16%. The products obtained by the method according to the invention have an advantageous compromise between mechanical strength and toughness.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
The invention relates to an aluminium-composite hybrid part comprising a stack of layers formed by alternating metallic layers made of an aluminium alloy and composite layers, characterized in that at least one of the layers is a metallic layer that is less than 1 mm thick and is made of an aluminium alloy, referred to as alloy of interest, belonging to the 6xxx series and containing between 0.6 and 1.5 % by weight silicon and between 0.4 and 1.2 % by weight magnesium, the percentage by weight of silicon being greater than that of magnesium. The invention also relates to an aircraft structural element comprising at least the above aluminium-composite hybrid part, and to a method of producing said aluminium-composite hybrid part, which includes at least one step of machining at least one layer made of the aluminium alloy of interest until it is less than 1 mm thick.
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
B32B 15/14 - Layered products essentially comprising metal next to a fibrous or filamentary layer
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
33.
IMPROVED PROCESS FOR MANUFACTURING SHEETS MADE OF ALUMINIUM-COPPER-LITHIUM ALLOY FOR AIRCRAFT FUSELAGE MANUFACTURE
The subject of the invention is a process for manufacturing a wrought product made of aluminium alloy comprising the following steps : a) casting a plate made of alloy comprising, in percentages by weight, Cu: 2.1 to 2.8; Li: 1.1 to 1.7; Mg: 0.2 to 0.9; Mn: 0.2 to 0.6; Ti: 0.01–0.2; Ag < 0.1; Zr < 0.08; Fe and Si ≤ 0.1 each; unavoidable impurities ≤ 0.05% each and 0.15% in total; remainder aluminium; b) homogenizing said plate at 480-520°C for 5 to 60 hours; c) hot-rolling and optionally cold-rolling said homogenized plate to give a sheet; d) solution annealing the sheet at 470-520°C for 5 minutes to 4 hours; e) quenching the solution-annealed sheet; f) controlled tensioning of the solution-annealed and quenched sheet with a permanent set of 1 to 6%; g) tempering of the tensioned sheet by heating at a temperature of at least 160°C for a maximum time of 30 hours.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
C22C 21/14 - Alloys based on aluminium with copper as the next major constituent with silicon
34.
TOOL FOR PERFORMING A FRICTION STIR WELDING WITH A FRUSTOCONICAL PIN; METHOD FOR WELDING TWO PARTS USING SUCH A TOOL; WELDED PRODUCT
The invention concerns a tool (1) intended for a friction stir welding station, the tool being capable of being rotated and comprising a body (10) defining a transverse surface forming a shoulder (11), a pin (12) extending, from the shoulder (11), along a longitudinal axis (Z) to an end (13), the pin (12) becoming slimmer between the shoulder (11) and the end, the distance between the end (13) and the shoulder (11) corresponding to a height of the pin, the pin (12) comprising a proximal portion (12p) adjacent to the shoulder (11) and extending from the shoulder (11) to the end (13) over at least 20% of the height of the pin, a distal portion (12d) adjacent to the end (13) and extending from the end (13) to the shoulder (11) over at least 1% of the height of the pin, the distal portion (12d) being inscribed in a cone frustum (14), the cone frustum (14) defining a surface, called the extension surface (15), extending the cone frustum (14) to the shoulder (11), the extension surface delimiting a frustoconical volume (16) in the proximal portion (12p), the pin extends to the outside of the frustoconical volume (16) delimited by the extension surface (15), and the pin (12) describes an outer surface inscribed in an envelope describing, in a plane parallel to the longitudinal axis (Z) and passing through the latter, in the proximal portion (12p), a profile following a curve (C), such that the curve (C) is tangential to the extension surface (15).
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23K 20/233 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
The invention relates to a flat product made of aluminium alloy with a thickness of greater than 12.5 mm that has improved thickness properties. This product is obtained by adjusting the mixing conditions during the casting of the ingot used for obtaining the flat product. The casting process is characterized by casting with mixing induced by a non-stationary field of external forces or casting with mixing induced by a pressing stationary field of external forces. The transformation process comprises a solution heat treatment at a temperature above 450°C, a quenching and a tempering or ageing in order to obtain a flat product made of aluminium alloy. Optionally, a scalping operation may be carried out during the transformation process in order to eliminate unacceptable surface defects if a rolling operation is carried out subsequently. The invention makes it possible in particular to increase the thickness of the cast product without degrading, or even while improving, the elongation in the short transverse direction of the final product.
B22D 11/049 - Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
B22D 11/115 - Treating the molten metal by using agitating or vibrating means by using magnetic fields
B22D 11/12 - Accessories for subsequent treating or working cast stock in situ
ff), so as to apply a Lorentz force (F) at various points of the sump, the average Lorentz force, during a period (P), being inclined relative to the vertical axis (Z) at an angle of inclination (β), the sump comprising a median zone, extending symmetrically on either side of the mid-plane, the thickness (T) of which corresponds to a half-thickness of the ingot; the process being characterized in that the casting speed (V) and the frequency (f) are such that throughout the median zone, level with the front, the angle of inclination of the force is strictly less than the angle of inclination of the front.
The invention relates to a rolled product made of aluminum alloy with a thickness of at least 50 mm comprising (in weight%): Zn 6.9 - 7.5; Mg 1.8 - 2.2; Cu 1.8 - 2.2, where the sum Cu + Mg is between 3.8 and 4.2; Zr 0.04 -0.14; Mn 0 - 0.1; Ti 0 - 0.15; V 0 - 0.1; Fe ≤ 0.15; Si ≤ 0.15; impurities ≤ 0.05 each and ≤ 0.15 total, balance aluminum. The invention also relates to the method of manufacturing such a product. The products according to the invention are particularly advantageous because they have a very favorable compromise between static mechanical strength, toughness and environmental-assisted cracking performance under conditions of high stress and humid environment.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
38.
AL- ZN-CU-MG ALLOYS AND THEIR MANUFACTURING PROCESS
The invention concerns an extruded, rolled and/or forged aluminum-based alloy product having a thickness of at least 25 mm comprising (in weight %) :; Zn 6.70 –7.40; Mg.50 –1.80; Cu 2.20 –2.60, with a Cu to Mg ratio of at least 1.30; Zr 0.04 –0.14; Mn 0 –0.5; Ti 0 –0.15; V 0 –0.15; Cr 0 –0.25; Fe 0 –0.15; Si 0 –0.15; impurities ≤ 0.0 each and ≤ 0.15 total. The invention also concerns a method of making such a product. Products according to the invention are particularly advantageous because they exhibit simultaneously a low sensitivity to environmentally assisted cracking under conditions of high stress and humid environment, high strength and high toughness properties.
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
39.
THIN SHEETS MADE OF ALUMINIUM-COPPER-LITHIUM ALLOY FOR AIRCRAFT FUSELAGE MANUFACTURE
The invention concerns a method for manufacturing a brushed rolled product made from Al-Cu-Li alloy with a thickness of less than 12 mm, comprising the steps of producing a rolled product, solution heat treatment and quenching, stress relieving, optionally tempering, and brushing, characterised in that the brushing tool applies a force to the rolled product generating residual compressive stresses at the surface of the brushed product; eliminates a thickness of at least 9 µm from the surface of the non-brushed rolled product; wherein the brushing step comprises at least one circular brushing motion. The rolled product obtained by the method according to the invention is advantageous. The use of such a product in an aircraft fuselage panel is advantageous.
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
B24B 39/00 - Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zoneAccessories therefor
B23P 9/00 - Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearingsFeatures of such surfaces not otherwise provided for, their treatment being unspecified
40.
ALUMINIUM ALLOY COMPRISING LITHIUM WITH IMPROVED FATIGUE PROPERTIES
An aluminium alloy comprising lithium with improved mechanical strength and toughness. The invention relates to a 2XXX wrought alloy product comprising from 0.05 to 1.9% by weight of Li and from 0.005 to 0.045% by weight of Cr and/or of V. The invention also relates to an as-cast 2XXX alloy product comprising from 0.05 to 1.9% by weight of Li and from 0.005 to 0.045% by weight of Cr and/or of V. Finally, the invention relates to an aircraft structure element, preferably a lower surface or upper surface element, the skin and stiffeners of which originate from the same starting material, a spar or a rib, comprising a wrought product.
The invention relates to a product made of an aluminium-based alloy comprising, by wt. %, Cu: 2.5-3.4; Li: 1.6-2.2; Mg: 0.4-0.9; Mn: 0.2-0.6, Zr: 0.08-0.18; Zn: ឬ 0.4; Ag: ឬ 0.15; Fe + Si ≤ 0.20; at least one element selected from Ti, Se, Cr, Hf and V, the content of the element, if selected, being: Ti: 0.01-0.15; Se: 0.01-0.15; Cr: 0.01-0.3; Hf: 0.01-0.5; V: 0.01-0.3; other elements ≤ 0.05 each and ≤ 0.15 in total; the remainder being aluminium. The invention also relates to a method for manufacturing an aluminum alloy-based, extruded, rolled and/or forged product, and a structural element incorporating at least one product as described above.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
The invention relates to a product made of an aluminium-based alloy comprising, by wt. %, Cu: 2.4-3.2; Li: 1.6-2.3; Mg: 0.3-0.9; Mn: 0.2-0.6; Zr: 0.12-0.18; such that Zr ≥ - 0.06*Li + 0.242; Zn: ឬ 1.0; Ag: ឬ 0.15; Fe + Si ≤ 0.20; optionally, at least one element selected from Ti, Sc, Cr, Hf and V, the content of the element, if selected, being: Ti: 0.01-0.1; Sc: 0.01-0.15; Cr: 0.01-0.3; Hf: 0.01-0.5; V: 0.01-0.3; other elements ≤ 0.05 each and ≤ 0.15 in total; the remainder being aluminium. The invention also relates to a method for manufacturing an as-cast aluminum alloy product according to the invention, comprising the following steps: preparing a liquid metal bath; casting an as-cast shape from said liquid metal bath; and solidifying the as-cast shape into a billet, a rolling plate or a forging blank; characterised in that the casting is performed without adding any grain refiner, or by adding a refiner comprising (i) Ti and (ii) B or C, such that the content of B from the refiner is less than 45 ppm, and that of C is less than 6 ppm, and/or characterised in that the casting is carried out, for an as-cast shape of thickness E or with a diameter D greater than 150 mm, at a casting rate v (mm/min) greater than 30 for a plate-type as-cast shape or 9000/D for a billet-type as-cast shape.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
43.
ALUMINIUM ALLOY VACUUM CHAMBER ELEMENTS WHICH ARE STABLE AT HIGH TEMPERATURE
The invention relates to a vacuum chamber element obtained by machining and surface treatment of sheet metal with a thickness of at least 10 mm made of aluminium alloy with the following composition, as wt%: Si: 0.4 – 0.7; Mg: 0.4 – 1.0; the ratio of Mg/Si in wt% being less than 1.8; Ti: 0.01 – 0.15, Fe 0.08 – 0.25; Cu ឬ 0.35; Mn ឬ 0.4; Cr: ឬ 0.25; Zn ឬ 0.04; other elements ឬ 0.05 each and ឬ 0.15 in total, the remainder being aluminium, characterised in that the grain size of said sheet metal is such that the mean linear intercept length l measured on the L/TC plane according to the ASTM E112 standard, is at least 350 µm between surface and ½ thickness. The invention likewise relates to the method for manufacturing such a vacuum chamber element. The products according to the invention are particularly advantageous in their resistance to creeping at high temperature, while having high properties of corrosion resistance, uniformity of properties in the thickness, and machinability.
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/05 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
C25D 11/04 - Anodisation of aluminium or alloys based thereon
44.
METHOD FOR IMPROVING THE WETTING OF A SURFACE OF A SOLID SUBSTRATE BY A LIQUID METAL
The invention relates to a method for treating a solid substrate, performed with a first material, of the metal or ceramic type, the method comprising bringing the substrate into contact with a liquid metal, while the substrate is exposed to an ultrasound wave called a power ultrasound wave. On a surface of the substrate, the power flux density is higher than a cavitation threshold of the liquid metal. Such an exposition improves the wettability of the surface of the substrate by the liquid metal.
B01J 19/10 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor employing sonic or ultrasonic vibrations
45.
METHOD FOR THE HYBRID PRODUCTION OF A STRUCTURAL ELEMENT COMPRISING ONE OR MORE STIFFENERS
The invention relates to a method for the production of a metal structural element from a workpiece, said metal structural element comprising a skin having stiffeners extending therefrom. According to the invention, one portion of the stiffeners is produced by machining, while the other portion is produced by adding material. The material can be added using an additive manufacturing process.
B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
B23K 26/34 - Laser welding for purposes other than joining
46.
THIN SHEETS MADE OF AN ALUMINIUM-MAGNESIUM-SCANDIUM ALLOY FOR AEROSPACE APPLICATIONS
The invention relates to a method for producing a hot-worked product made of an aluminium alloy composed, in wt%, of Mg: 3.8-4.2; Mn: 0.3-0.8 and preferably 0.5-0.7, Sc: 0.1-0.3; Zn: 0.1-0.4; Ti: 0.01-0.05; Zr: 0.07-0.15; Cr: ឬ0.01; Fe: ឬ0.15; Si ឬ0.1; wherein the homogenisation is carried out at a temperature of between 370°C and 450°C, for between 2 and 50 hours, such that the equivalent time at 400°C is between 5 and 100 hours, and the hot deformation is carried out at an initial temperature of between 350°C and 450°C. The invention also relates to hot-worked products obtained by the method according to the invention, in particular sheets with a thickness of less than 12mm. The products according to the invention are advantageous as they offer a better compromise in terms of mechanical strength, toughness and hot-formability.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
47.
METHOD FOR PRODUCING SHEET INGOTS BY VERTICAL CASTING OF AN ALUMINIUM ALLOY
The invention is a method for casting a metal alloy, and in particular an aluminium alloy, in an ingot mould extending along a vertical axis, the horizontal section of the ingot mould being parallelepiped in shape. During casting, a travelling alternating magnetic field is applied to a liquid phase of the alloy, the magnetic field having a maximum amplitude propagating along an axis of propagation. Under the effect of the magnetic field, a Lorentz force is applied to said liquid phase of the alloy, such that a Lorentz force of maximum intensity propagates along the axis of propagation. The method according to the invention comprises modulating said maximum intensity of the Lorentz force propagating along the axis of propagation. This modulation is obtained by varying, over time, one or more parameters, referred to as force parameters, governing the Lorentz force. The invention also concerns an ingot obtained by the method. The invention makes it possible to obtain a significant reduction in instances of macrosegregation, referred to as intermittent macrosegregations, the latter giving rise to a non-uniform spatial distribution of alloy elements in the ingot. The ingot obtained is therefore more uniform.
A system (100) for controlling the progress of the manufacture of at least one product by vertical semi-continuous direct chill casting, in particular from aluminium alloy, in a respective fixed mould (41), said control system (100) comprising: - at least one respective dummy bottom (4) configured to form a movable lower bottom of the respective fixed mould and to carry the product during casting; - at least one weighing cell (3), on which the respective dummy bottom (4) is arranged to rest, the weighing cell (3) being configured to take measurements representative of the mass of the product carried by the respective dummy bottom (4) during casting; and - a support (2) of the dummy bottom, to which the weighing cell (3) is linked, configured to lower the/each false bottom (4) relative to the respective fixed mould (41), substantially in a vertical direction, during casting; - at least one processing unit (21) connected to the/each weighing cell (3), and configured to process the measurements, and calculate the variation in the mass of the product over time.
The invention relates to an enclosure (1) having a sealing device (30), for a casting installation, having a first body (10) and a second body (20) that is removably joined to the first body along a bearing axis (G), the first and second bodies together delimiting an internal chamber (3). The sealing device comprises: -at least one compression member (31), -at least one seal (40A) having a lateral contact face (41A) extending substantially parallel to the bearing axis (G); -the compression member and the seal being arranged with respect to one another such that the compression member is in contact with the lateral contact face of the seal and exerts a compression force thereon that is oriented orthogonally to the bearing axis.
B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths
B22D 11/049 - Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
B22D 11/14 - Plants for continuous casting, e.g. for upwardly drawing the strand
The invention relates to a rolled product having a thickness of at least 50 mm made of aluminium alloy comprising, in % by weight, 2.2% to 3.9% of Cu, 0.7% to 1.8% of Li, 0.1% to 0.8% of Mg, 0.1% to 0.6% of Mn; 0.01% to 0.15% of Ti, at least one element chosen from Zn and Ag, the amount of said element, if it is chosen, being 0.2% to 0.8% for Zn and 0.1% to 0.5% for Ag, optionally at least one element chosen from Zr, Cr, Sc, Hf, and V, the amount of said element, if it is chosen, being 0.04% to 0.18% for Zr, 0.05% to 0.3% for Cr and for Sc, 0.05% to 0.5% for Hf and for V, less than 0.1% of Fe, less than 0.1% of Si, the remainder being aluminium and inevitable impurities, having a content of less than 0.05% each and 0.15% in total; characterized in that its granular structure is predominantly recrystallised between ¼ and ½ thickness. The invention also relates to the process for manufacturing such a product. The products according to the invention are advantageously used in aircraft construction, in particular for the production of an aircraft wing spar or rib.
The invention describes a tooling for producing a metal product by feed casting, comprising a mould comprising a preheater, an ingot mould (10), a movable bottom that moves in a main direction X and a transition ring (11) interposed between the preheater and the ingot mould (10). The tooling comprises a clamping ring (12) capable of transmitting a clamping force (F1) to the transition ring (11) oriented towards the ingot mould (10) in the main direction (X), a holding mechanism that positively locks the clamping ring (12) and is capable of exerting a holding force (F2) on the clamping ring (12) turned towards the transition ring (11) in the main direction (X), and an axial relief mechanism configured so as to vary between an inactive state in which the holding mechanism exerts said holding force (F2) on the clamping ring (12) such that the clamping ring (12) exerts said clamping force (F1) on the transition ring (11) and an active state in which the axial relief mechanism resists the action applied by the holding mechanism on the clamping ring (12) in the inactive state in such a way as to release the clamping ring (12) in the axial direction (X) and allow the clamping ring (12) to be taken out of the mould such that the transition ring (11) can be removed in the main direction on the opposite side of the ingot mould (10).
The invention relates to a method for ultrasonic inspection of an object wherein a multi-element ultrasonic probe comprising a plurality of basic transducers is applied to the object. The method comprises: consecutive activation of the basic transducers such that when activated each transducer emits an ultrasonic wave incident on said object; following each activation of a basic transducer, acquisition, by a plurality of basic transducers, of a detection signal representative of a wave reflected by the object during propagation of said ultrasonic wave in the latter. The object is divided into points referred to as mesh points. Each acquired detection signal is subsequently used to calculate, at each mesh point, a parameter representative of the object that is to reflect an incident ultrasonic wave. The method comprises, during this calculation, a selection of a group of transducers from among the basic transducers of the probe.
The invention is a rolled and/or forged product, made of an aluminium-based alloy comprising, in % by weight, Cu: 3.2 - 4.0; Li: 0.80 - 0.95; Zn: 0.45 - 0.70; Mg: 0.15 - 0.7; Zr: 0.07 - 0.15; Mn: 0.1 - 0.6; Ag : ឬ 0.15; Fe + Si ≤ 0.20; at least one element from Ti: 0.01-0.15; Se: 0.02 - 0.1; Cr: 0.02 - 0.1; Hf: 0.02 - 0.5; V: 0.02 - 0.1; other elements ≤ 0.05 each and ≤ 0.15 in total, remainder aluminium. In the process for manufacturing the products according to the invention a bath of liquid metal based on aluminium as alloy according to the invention is melted, an unwrought product is cast from said bath of liquid metal; said unwrought product is homogenized at a temperature between 450°C and 550°C; said unwrought product is hot worked and optionally cold worked preferably to a thickness of at least 15 mm: said product is solution treated between 490°C and 530°C for 15 min to 8 h and quenched; said product is drawn in a controlled manner with a permanent deformation of 1% to 7% and a tempering of said product is carried out. The product is advantageous for the manufacture of an aircraft structural component.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
54.
THIN SHEETS MADE FROM ALUMINIUM-MAGNESIUM-ZIRCONIUM ALLOYS FOR AEROSPACE APPLICATIONS
The invention relates to a wrought aluminium alloy product having composition, in percent by weight, Mg: 4.0-5.5; Li: 0.4-0.7; Mn: 0.5-0.9; Zr: 0.08-0.15; Si: ≤ 0.2; Fe: ≤ 0.25; Zn: ≤ 0.4; Sc: ≤ 0.4; Ti: ≤ 0.15; Er, Yb, Gd, Y, Hf and/or Nb: ≤ 0.2; other elements ≤ 0.05 each and ≤ 0.15 in association; the remainder being aluminium. The invention also relates to a method for producing said wrought aluminium alloy product, comprising the successive steps of: casting a crude shape in aluminium alloy; optionally, homogenising; hot deforming of the crude shape at a deformation end temperature greater than 250 °C; heat treatment or thermomechanical treatment at a temperature between 250 and 350°C, as well as the use of said wrought product for producing aluminium structural elements of aircraft, having undergone a heat treatment or a thermomechanical treatment at a temperature between 250 and 350 °C and having, at mid-thickness, for a thickness of 0.5 to 30 mm, an essentially non-recrystallised microstructure.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
55.
EXTRUDED PRODUCT MADE FROM AL-CU-MG ALLOY WITH IMPROVED COMPROMISE BETWEEN MECHANICAL RESISTANCE AND TOUGHNESS
The invention relates to an extruded product made from an alloy of composition (% by weight): Cu: 5.05-5.35; Mg: 0.20-0.40; Mn: 0.20-0.40; Zr: 0.08-0.1; Ti: 0.01-0.15; Zn: 0-0.15; Si < 0.10; Fe < 0.15 and other elements < 0.05 each and < 0.15 in total, the remainder being Al, treated by dissolving, at a temperature between 525 and 540 °C, quenching, controlled traction during quenching until a permanent deformation of at least 1.5% is achieved, and returning to a temperature of between 160 and 190 °C. The products according to the invention are particularly well suited to use as pistons in an internal combustion engine of a vehicle and in particular of a racing car.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
Process for using a wetted tubular sonotrode. The process comprises the following steps: a) providing a tubular sonotrode (1) formed from a material that is substantially inert to liquid aluminium, such as a ceramic, for example a silicon oxynitride, the sonotrode comprising a first end region (2) that is open and a second end region (3) that is preferably closed, b) at least partly immersing the open end region (2) of the tubular sonotrode (1) in the liquid aluminium alloy, and c) applying powerful ultrasonic waves to the liquid aluminium alloy by means of the tubular sonotrode (1).
The invention relates to a method which comprises the following steps: a) providing a first bath of a liquid metal (1) comprising aluminium with a content X and magnesium with a content Y, the content Y of magnesium being other than zero; b) at least partially dipping a sonotrode (3), made of a material that is inert in liquid aluminium, into the first bath of liquid metal (1); and c) applying powerful ultrasounds to the sonotrode (3) so as to energise the liquid metal (1) until the wetting (5) of the sonotrode (3) by the liquid metal (1) is achieved; d) cooling the first liquid metal (1) of the first bath until the first liquid metal (1) solidifies around the sonotrode (3), generating an intimate bond (6) between the sonotrode (3) and the first solidified liquid metal (1), said bond having a bond strength substantially equal to that of brazing between two metals; and e) machining the solidified first metal (1) in the shape of a clamp (7) configured for attaching a mechanical amplifier and/or a transducer (4).
G01N 29/032 - Analysing fluids by measuring attenuation of acoustic waves
B06B 3/00 - Processes or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic or ultrasonic frequency
G01N 29/22 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object Details
58.
METHOD FOR INSPECTING A LIQUID METAL BY ULTRASOUNDS
The invention relates to a method which comprises the following steps: a) providing a sonotrode (1) made of a material that is essentially inert in the liquid metal, such as a ceramic, and preferably a silicon nitride or a silicon oxynitride, such as SIALON, or a metal that is essentially inert in said liquid metal; b) at least partially dipping the sonotrode (1) into a bath of said metal; c) applying powerful ultrasounds to the sonotrode (1), in particular ultrasounds with a power of more than 10 watts, such as to obtain the wetting of said sonotrode by said metal; d) continuously applying measurement ultrasounds to the sonotrode (1), also referred to as inspection ultrasounds, in particular ultrasounds with a frequency of 1 to 25 MHz; e) intermittently applying powerful ultrasounds to the sonotrode (1), in particular ultrasounds with a power of more than 10 watts, in order to maintain said wetting.
The invention relates to a wrought product made of aluminum alloy having the composition, in percentage by weight, of Mg: 4.0-5.0; Li: 1.0-1.8; Mn: 0.3-0.5; Zr: 0.05-0.15; Ag: ≤ 0.5; Fe: ≤ 0.1; Ti: <0.15; Si: ≤ 0.05; other elements ≤0.05 each and ≤0.15 in association; the remainder is aluminum. The invention further relates to a method for manufacturing such a wrought product, in which an unprocessed form of aluminum alloy is poured, which has the composition, in percentage by weight, of Mg: 4.0-5.0; Li: 1.0-1.8; Mn: 0.3-0.5; Zr: 0.05-0.15; Ag: ≤ 0.5; Fe: ≤ 0.1; Ti: <0.15; Si: ≤ 0.05; other elements ≤0.05 each and ≤0.15 in association; the remainder is aluminum. Optionally, said unprocessed form is homogenized; said unprocessed form is hot-worked to obtain a hot-worked product; optionally, said hot-worked product is placed in a solution at a temperature of 360°C to 460°C, preferably of 380°C to 420°C, for 15 minutes to 8 hours; said hot-worked product is quenched; optionally, said hot-worked and quenched product is straightened, optionally, the worked product is cold-worked under controlled conditions to obtain permanent cold working of 1 to 10 %, preferably 2 to 6%, most preferably 3 to 5%; said worked and quenched product is tempered. The invention also relates to the use of said wrought product to produce aircraft structural elements.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
60.
METHOD FOR MANUFACTURING PRODUCTS MADE OF MAGNESIUM-LITHIUM-ALUMINUM ALLOY
The invention relates to a method for manufacturing a wrought product wherein: (a) an as-cast form of aluminum alloy of composition is poured, in percentage by weight, Mg: 4.0-5.0; Li: 1.0-1.8; Zr: 0.05-0.15; Mn: ≤ 0.6; Ag: ≤ 0.5; Fe: ≤ 0.1; Ti: <0.15; Si: ≤ 0.05; other elements ≤0.05 each and ≤0.15 in association; the remainder aluminum; (b) optionally, said as-cast form is homogenized; (c) said as-cast form is hot-worked to obtain a hot-worked product; (d) optionally, said hot-worked product is placed in a solution at a temperature of 360°C to 460°C, preferably 380°C to 420°C, for 15 minutes to 8 hours; (e) said hot-worked product is quenched; (f) optionally, said hot-worked and quenched product is straightened or leveled; (g) said worked and quenched product is tempered; (h) said worked and thus tempered product is cold-worked under controlled conditions to obtain permanent cold working of 1 to 10%, preferably 2 to 6%, most preferably 3 to 5%. The invention also relates to a wrought product obtainable according to the method of the invention as well as the use of said wrought product to achieve aircraft structural elements.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
61.
ISOTROPIC ALUMINIUM-COPPER-LITHIUM ALLOY SHEETS FOR PRODUCING AEROPLANE FUSELAGES
The invention concerns a sheet 0.5 to 9 mm thick, having an essentially recrystallised granular structure made from an aluminium alloy comprising 2.8 to 3.2 % by weight of Cu, 0.5 to 0.8 % by weight of Li, 0.1 to 0.3 % by weight of Ag, 0.2 to 0.7 % by weight of Mg, 0.2 to 0.6 % by weight of Mn, 0.01 to 0.15 % by weight of Ti, a quantity of Zn of less than 0.2 % by weight, a quantity of Fe and of Si of less than 0.1 % each by weight, and inevitable impurities in a content less than or equal to 0.05% each by weight and 0.15% in total by weight, said sheet being obtained by a method comprising pouring, soaking, hot rolling and optionally cold rolling, solution annealing, quenching and tempering. The sheets according to the invention are particularly advantageous for producing aircraft fuselage panels.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
62.
METHOD FOR RECYCLING SCRAP OF 2XXX OR 7XXX SERIES ALLOYS
The invention relates to a method for manufacturing an ingot made of an aluminium alloy using scrap of series 2xxx or 7xxx aluminium alloys, which includes the steps of: (i) provisioning the scrap of series 2xxx or 7xxx aluminium alloys; (ii) optionally separating the oil found on the scrap; (iii) performing a first operation of treating said scrap with a first liquid at a temperature of at least 10 °C, said first liquid being an aqueous solution having a pH of 1 to 5 or of 8 to 13; (iv) separating the first liquid and the scrap thus treated; (v) performing at least one second operation of treating said scrap using a second liquid; (vi) separating the second liquid and the scrap thus treated; (vii) melting down said scrap thus obtained; (viii) optionally performing a first solidification to an intermediate unwrought product; and (viii) casting an ingot of aluminium alloy of the series of the scrap used. The invention also relates to a method for manufacturing, after rolling, extruding and/or forging, an aeronautical structural element including, in addition to the steps of the preceding method, at least one step of rolling, extruding and/or forging said ingot of aluminium alloy of the series of the scrap used.
The invention relates in particular to an unprocessed extruded product for manufacturing a machined extruded product for the aeronautical industry, made of an Al-Cu-Li alloy with the following composition, as weight percentages: Cu: 2.0 - 6.0; Li: 0.5 - 2.0; Mg: 0 - 1.0; Ag: 0 - 0.7; Zn 0 - 1.0; and at least one element selected among Zr, Mn, Cr, Se, Hf and Ti, the amount of said element, if chosen, being 0.05 to 0.20 wt % for Zr, 0.05 to 0.8 wt % for Mn, 0.05 to 0.3 wt % for Cr and for Se, 0.05 to 0.5 wt % for Hf and 0.01 to 0.15 wt % for Ti, Si ≤ 0.1; Fe ≤ 0.1; others ≤ 0.05 each and ≤ 0.15 in total, the balance being aluminium, having an unprocessed core (21) with an aspect ratio of at least 5 and at least one unprocessed flank (22) with an aspect ratio of less than 4 and in which the length direction is substantially perpendicular to the lengthwise direction of the core, characterised in that a portion of the unprocessed flank (22) connecting the unprocessed flank to the unprocessed core has decreasing thickness and in that the ratio of the thickness of said unprocessed flank (22) at the end of said unprocessed flank connected to the web (E221) to that at the end thereof opposite the core (E222) — i.e. E221/E222 — is less than 0.8, thus defining two substantially symmetrical concave areas. The invention also relates to the method for manufacturing a machined extruded product and to the corresponding machined extruded product. The products according to the invention are useful in particular for manufacturing floor beams and girders.
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
64.
PRODUCTS MADE OF ALUMINIUM-COPPER-LITHIUM ALLOY WITH IMPROVED FATIGUE PROPERTIES
The invention relates to a metal sheet with a thickness of at least 80 mm made of an aluminium alloy including, as weight percentages: Cu: 2.0 - 6.0; Li: 0.5 - 2.0; Mg: 0 - 1.0; Ag: 0 - 0.7; Zn 0 - 1.0; and at least one element selected among Zr, Mn, Cr, Se, Hf and Ti, the amount of said element, if chosen, being 0.05 to 0.20 wt % for Zr, 0.05 to 0.8 wt % for Mn, 0.05 to 0.3 wt % for Cr and for Se, 0.05 to 0.5 wt % for Hf and 0.01 to 0.15 wt % for Ti, Si ≤ 0.1; Fe ≤ 0.1; others ≤ 0.05 each and ≤ 0.15 in total, characterised in that in the tempered state the logarithmic mean of the fatigue thereof, as measured at mid-thickness in the TL direction on smooth test pieces with a maximum amplitude constraint of 242 MPa, a frequency of 50 Hz and a stress ratio of R = 0.1, is at least 250,000 cycles. The product according to the invention is obtained by a method which, in particular, has specific casting conditions. The use of a metal sheet according to an invention is advantageous for manufacturing an aeroplane structural element, preferably a spar, ribs or a frame.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
65.
METHOD FOR MANUFACTURING PRODUCTS MADE OF ALUMINIUM-COPPER-LITHIUM ALLOY WITH IMPROVED FATIGUE PROPERTIES, AND DISTRIBUTOR FOR THIS METHOD
The invention relates to a method for manufacturing an aluminium alloy product including the steps of: creating a bath of liquid metal in an aluminium - copper - lithium alloy, casting said alloy by vertical semi-continuous casting so as to obtain a plate with thickness T and width W such that, during solidification, the hydrogen content of said liquid metal bath (1) is lower than 0.4 ml/100 g, the oxygen content above the liquid surface (14, 15) is less than 0.5 % by volume, the distributor used (7) for casting is made of a fabric including essentially carbon, including a lower surface (76), an upper surface defining the opening through which the liquid metal is inserted (71) and a wall with a substantially rectangular section, the wall containing two longitudinal portions parallel to the width W (720, 721) and two transverse portions parallel to the thickness T (730, 731) said transverse and longitudinal portions being formed by at least two fabrics, a first substantially sealing and semi-rigid fabric (77) ensuring that the distributor keeps its shape during casting, and a second non-sealing fabric (78) allowing the passage and filtration of the liquid, said first and second fabrics being connected to one another with no overlap and no gaps separating same, said first fabric continuously covering at least 30 % of the surface of said wall portions (720, 721, 730, 731) and being positioned such that the liquid surface is in contact with same over the entire section.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22C 21/18 - Alloys based on aluminium with copper as the next major constituent with zinc
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
The invention relates to a method for manufacturing a laminated or forged material, the thickness of which is 14 to 100 mm. Said material is made of an aluminum alloy composed, in wt%, of: 1.8-2.6 Cu; 1.3-1.8 Li; 0.1-0.5 Mg; 0.1-0.5 Mn and Zr <0.05, or Mn <0.05 and 0.10-0.16 Zr; Ag 0-0.5 Ag; Zn <0.20; 0.01-0.15 Ti; Fe <0.1; Si <0.1; other elements <0.05 each and <0.15 total; and aluminum residue, the density of which is lower than 2.670 g/cm3. Said method includes: homogenizing; hot working under conditions such that, when the manganese content is 0.1 to 0.5 wt% and the zirconium content is lower than 0.05 wt%, the final hot working temperature is at least 400°C, and when manganese content is lower than 0.05 wt% and zirconium content is 0.1 to 0.16 wt%, the final hot working temperature is at most 400°C; placement in solution; quenching; controlled stretching; and tempering. The materials obtainable according to the invention have: a thickness of 20 mm to 50 mm; an elastic limit of at least 390 MPa at mid-thickness Rpo,2(L); a rigidity KappL-T (W=406 mm) of at least 105 MPA√m, even after aging of 3,000 hours at 85°C; and at least 250,000 cycles under the condition 6.5 MPa√m < ΔK < 16.6 MPa√m for a fatigue test, carried out according to ASTM standard E647, in CCT test tubes having a width of 160 mm, with samples taken in the L-T direction at ¼ thickness. The materials according to the invention are particularly suitable for manufacturing airplane underwing elements.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
B64C 1/00 - FuselagesConstructional features common to fuselages, wings, stabilising surfaces or the like
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
67.
UNDERWING SHEET METAL WITH IMPROVED DAMAGE TOLERANCE PROPERTIES
The invention relates to a rolled product with state T351, having thickness of between 15 and 50 mm, made from aluminium alloy having the following composition, in % by weight, Cu: 3.85 - 4.15; Mg: 0.95 - 1.25; Mn: 0.45 - 0.57; Zr: 0.09 - 0.16; Ti: 0.005 - 0.1; Fe: < 0.070; Si: < 0.060; with Cu + Mg ≤ 5.15; other lesser elements 0.05 each and less than 0.15 in total, the remainder being aluminium. In the manufacturing method for a rolled product according to the invention, an alloy according to the invention is prepared and poured by adding a refiner of type A1TiB or A1TiC to obtain a rolling plate, optionally, said rolling plate is homogenised at a temperature between 480 °C and 510 °C, said optionally homogenised rolling plate being hot rolled to obtain a sheet of thickness e, between 15 and 50 mm, said sheet is solution heat-treated at a temperature between 480 and 505 °C for a period t, expressed in hours, such that t ≥ e / 7, said sheet metal solution heat-treated in this way is then quenched, said sheet metal is cold drawn and thus hardened with a deformation of between 1.5 and 3% and aged at room temperature. The metal sheets according to the invention present, in particular, an advantageous compromise between static mechanical strength, toughness and the propagation of fatigue cracks under inspection and are advantageous for the manufacture of underwing elements of an aircraft wing.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/14 - Alloys based on aluminium with copper as the next major constituent with silicon
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
68.
EXTRADOS STRUCTURAL ELEMENT MADE FROM AN ALUMINIUM COPPER LITHIUM ALLOY
The invention relates to an extrados structural element made from an aluminium, copper and lithium alloy and a method for manfacturing same. In the method according to the invention, an alloy with composition (in wt%) 4.2 to 5.2 Cu, 0.9 to 1.2 Li, 0.1 to 0.3 Ag, 0.1 to 0.25 Mg, 0.08 to 0.18 Zr, 0.01 to 0.15 Ti, optionally upt o 0.2 Zn, optionally up to 0.6 Mn, an Fe and Si content level less than or equal to 0.1% each, and other element with a content level less than or equal to 0.05% each and 0.15% in total, the aluminium is poured, homogenised, deformed hot and optionally cold, placed in a solution at a temperature of at least 515°C, pulled from 0.5 to 5% and annealed. The combination in particular of the magnesium, copper and manganese content with the temperature in solution can reach a very advantageous elasticity under compression limit. Thus, the products according to the invention having a thickness of at least 12 mm have an elasticity under compression limit in the longitudinal direction of at least 645 MPa and an elongation in the longitudinal direction of at least 7%.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
69.
IMPROVED STRUCTURAL ELEMENTS OBTAINED BY LINEAR FRICTION WELDING
The invention concerns a method for forming by welding along a flat surface an article comprising at least a first metallic member (10) in the form of an aluminium alloy wrought product having elongated grains in a longitudinal direction (L10), with an anisotropy index in a longitudinal oriented surface of at least 4 according to ASTM E112 and/or an anisotropy index in a planar oriented surface of at least 1,5 according to ASTM E112 and at least a second metallic member (11), wherein - the first metallic member (10) is positioned in contact with the second metallic member so that said longitudinal direction (L10) of the elongated grains is positioned substantially within the weld plane, - the article is formed by linear friction welding. The method according to the invention is particularly useful to improve strength and elongation of welded joints obtained by linear friction welding. Structural articles of aircrafts obtained with the method of the invention are advantageous, in particular aircraft structural members.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
70.
METHOD FOR TRANSFORMING AL-CU-LI ALLOY SHEETS IMPROVING FORMABILITY AND CORROSION RESISTANCE
The invention concerns the method for producing a rolled product 0.5 to 10 mm thick made from an aluminium alloy comprising, in particular, copper and lithium, in which, after solution annealing and quenching, a short heat treatment is carried out in which the sheet reaches a temperature of between 145°C and 175°C for 0.1 to 45 minutes, the speed of heating being between 3 and 600 °C/min. The sheet obtained at the end of the method according to the invention has high corrosion resistance and is capable of being shaped for producing a structural element for an aircraft, in particular an aircraft fuselage skin.
C22C 21/12 - Alloys based on aluminium with copper as the next major constituent
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
71.
ALUMINIUM-COPPER-LITHIUM ALLOY SHEETS FOR PRODUCING AEROPLANE FUSELAGES
The invention concerns a sheet 0.5 to 8 mm thick made from aluminium alloy comprising 2.6 to 3.0% by weight of Cu, 0.5 to 0.8% by weight of Li, 0.1 to 0.4% by weight of Ag, 0.2 to 0.7% by weight of Mg, 0.06 to 0.20% by weight of Zr, 0.01 to 0.15% by weight of Ti, optionally at least one element chosen from Mn, V, Cr, Se, and Hf, the quantity of the element, if chosen, being 0.01 to 0.8% by weight for Mn, 0.05 to 0.2% by weight for V, 0.05 to 0.3% by weight for Cr, 0.02 to 0.3% by weight for Se, 0.05 to 0.5% by weight for Hf, a quantity of Zn less than 0.2% by weight, a quantity of Fe and Si less than or equal to 0.1% by weight each, and inevitable impurities at a concentration less than or equal to 0.05% by weight each and 0.15% by weight in total, said sheet being obtained by a method comprising casting, homogenising, hot rolling and optionally cold rolling, solution heat treatment, quenching and tempering, the composition and the tempering being combined in such a way that the elasticity limit in the longitudinal direction Rp0.2(L) is between 395 and 435 MPa. The sheet according to the invention is particularly advantageous for producing aircraft fuselage panels.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
B64C 1/00 - FuselagesConstructional features common to fuselages, wings, stabilising surfaces or the like
72.
THIN SHEETS MADE OF AN ALUMINIUM-COPPER-LITHIUM ALLOY FOR PRODUCING AIRPLANE FUSELAGES
The invention relates to a method for manufacturing a thin sheet having a thickness of 0.5 to 3.3 mm and an essentially non-recrystallized structure made of aluminium-based alloy which comprises, in sequence, the following steps: a) creating a liquid metal bath including 2.6 to 3.4 wt % of Cu, 0.5 to 1.1 wt % of Li, 0.1 to 0.4 wt % of Ag, 0.2 to 0.8 wt % of Mg, 0.11 to 0.20 wt % of Zr, 0.01 to 0.15 wt % of Ti, optionally at least one element selected from Mn, V, Cr, Se and Hf, the amount of the element, if selected, being 0.01 to 0.8 wt % for Mn, 0.05 to 0.2 wt % for V, 0.05 to 0.3 wt % for Cr, 0.02 to 0.3 wt % for Se, 0.05 to 0.5 wt % for Hf, an amount of Zn that is lower than 0.6 wt %, an amount of Fe and Si that is no higher than 0.1 wt % each, and inevitable impurities having a content that is no higher than 0.05 wt % each and 0.15 wt % in total; b) casting a plate from said liquid metal bath; c) homogenising said plate at a temperature of 450 °C to 515 °C; d) rolling said plate by hot rolling into a sheet having a thickness of 4 to 12 mm; e) rolling said sheet, by means of cold rolling, into a thin sheet having a final thickness of 0.5 to 3.3 mm, the thickness reduction achieved by cold rolling being between 1 and 3.5 mm; f) performing a thermal treatment during which the sheet reaches, for at least thirty minutes, a temperature of 300 °C to 450 °C; g) solution heat treating said thin sheet at a temperature of 450 °C to 515 °C and quenching same; h) tensioning said sheet in a controlled manner with a permanent deformation of 0.5 to 5 %, the cold deformation after a solution heat treatment being less than 15 %; and i) performing a tempering step which includes heating to a temperature of 130 °C to 170 °C, preferably 150 °C to 160 °C, during 5 to 100 hours, preferably 10 to 40 hours.
C22C 21/16 - Alloys based on aluminium with copper as the next major constituent with magnesium
C22F 1/057 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
patents
