EP2598664B1 - Alliage à base d'aluminium contenant du scandium pou hautes températures et avec une extrudabilite améliorée - Google Patents

Alliage à base d'aluminium contenant du scandium pou hautes températures et avec une extrudabilite améliorée Download PDF

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Publication number
EP2598664B1
EP2598664B1 EP11761484.2A EP11761484A EP2598664B1 EP 2598664 B1 EP2598664 B1 EP 2598664B1 EP 11761484 A EP11761484 A EP 11761484A EP 2598664 B1 EP2598664 B1 EP 2598664B1
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Prior art keywords
weight
scandium
primary material
alloy
vacuum
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German (de)
English (en)
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EP2598664A1 (fr
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Frank Palm
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Airbus Operations GmbH
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Airbus Operations GmbH
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/20—Use of vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component

Definitions

  • the invention relates to a high-temperature scandium alloyed aluminum material, a process for its preparation and the use of a process for its preparation.
  • the object of the present invention is to provide a method for producing a scandium alloyed aluminum material and the use of such a method, whereby the high temperature load capacity of this material is improved. It is further desirable to provide a method for producing a scandium-alloyed aluminum material and the use of such a method that makes it possible to reduce the amount of scandium used.
  • Another object of the present invention is to provide a scandium-alloyed aluminum material and a method of making the same, the scandium-alloyed aluminum material having improved strength and thermal stability.
  • a use of a method comprising the steps of: (a) introducing a precursor comprising an alloy comprising the metals aluminum and scandium into a vacuum chamber, said precursor being an AlMgMnScZr alloy consisting of 4.3 wt% Magnesium, 0.7% by weight scandium, 0.3% by weight zirconium and 0.5% by weight manganese, in each case based on the total weight of the alloy, the proportion of impurities in the total weight of the alloy being below 0.5% by weight, the rest is aluminum, (b) vacuum gases of the starting material at a vacuum of 0.1 to 10 -8 mbar and a temperature of 275 to 400 ° C over a period of 15 to 30 minutes, (c) gassing the starting material with nitrogen a duration of 1 to 30 minutes, where the nitrogen contains a water content of less than 1000 ppm, and (d) final vacuum degassing of the raw material at a vacuum of 0.1 to 10 -8 mbar and a temperature of
  • a method of making a high temperature scandium alloyed aluminum material comprising the steps of: (a) introducing a precursor material comprising an alloy comprising the metals aluminum and scandium into a vacuum chamber, the precursor material comprising an AlMgMnScZr; Alloy consisting of 4.3 wt .-% magnesium, 0.7 wt .-% scandium, 0.3 wt .-% zirconium and 0.5 wt .-% manganese, each based on the total weight of the alloy, wherein the proportion of impurities in the total weight of the Alloy below 0.5 wt .-%, the rest is aluminum, wherein the starting material (b) vacuum gases of the starting material at a vacuum of 0.1 to 10 -8 mbar and a temperature of 275 to 400 ° C over a period of 15 to 30 minutes, (c) gasification of the starting material with nitrogen for a period of 1 to 30 minutes, the nitrogen having a water content
  • a high temperature scannable aluminum alloy material obtainable by a process comprising the steps of: (a) incorporating a primary material comprising an alloy comprising the metals aluminum and scandium in a vacuum chamber, wherein the starting material is an AlMgMnScZr alloy consisting of 4.3 wt .-% magnesium, 0.7 wt .-% scandium, 0.3 wt .-% zirconium and 0.5 wt .-% manganese, each based on the total weight of the alloy, wherein the proportion of impurities in the total weight of the alloy is less than 0.5 wt .-%, the balance is aluminum, wherein the starting material was prepared by the melt spinning method, (b) vacuum gases of the starting material at a vacuum of 0.1 to 10 -8 mbar and a temperature of 275 to 400 ° C over a period of 15 to 30 minutes, (c) gassing the starting material with nitrogen over a period of 1 to 30 minutes, the starting material was prepared by the melt spinning method,
  • the inventive method and / or its use allows the production of AlSc materials, which have a larger processing window for the production of semi-finished products.
  • the materials produced by the process according to the invention and / or its use can be processed at higher temperatures, faster extrusion rates and higher injection ratios. This is for example advantageous for the production of semi-finished products by means of the extrusion process.
  • the invention enables the production of lightweight and corrosion-resistant AlSc materials with very high heat resistance. These materials according to the invention have a high toughness and damage tolerance and allow cost-effective process leading.
  • the inventive method and its use has the advantage that the reinforcement takes place "in situ" and, for example, no nanoscale reinforcing phase powder must be used, which are difficult to process and explosive.
  • an "aluminum material” is understood to mean a metallic material which consists essentially of aluminum and may be alloyed with other metals.
  • a "high-temperature-loadable AlSc material” is an aluminum material alloyed with scandium and, if appropriate, even further metals, whose structure or microstructure is at a Temperature load of more than 350 ° C remains largely stable, ie the grain size and the amount of precipitates, as well as their size and distribution remains largely constant, so that the material has similar strength properties at room temperature as before the temperature.
  • a "high-temperature-resistant AlSc material” in the context of the present invention preferably exhibits a drop in tensile strength R m of less than 5% and / or after a temperature of 375 ° C. after a temperature exposure of 350 ° C. to the starting material at room temperature the starting material at room temperature, a drop in the tensile strength R m of less than 10%.
  • a use of a method for producing a high-temperature scandium-alloyed aluminum material described here comprises the following method steps: (a) introducing a starting material comprising an alloy comprising the metals Al and Sc into a vacuum chamber (b) vacuum gases of the starting material, (c) Gassing the primary material with nitrogen, (d) final vacuum degassing of the primary material, and (e) compacting the primary material immediately following step (d) in the vacuum chamber.
  • the primary material used in the process comprises an alloy comprising the metals aluminum and scandium.
  • the amount of scandium in the alloy is 0.7% by weight based on the total mass of the alloy.
  • the alloy additionally includes Zr, which has properties similar to scandium in aluminum materials. This element can behave additively with the scandium, ie it can be forcibly dissolved with the scandium in the aluminum material and thus allow an increase in solidification by precipitation hardening.
  • the Al 3 Sc phase is modified by replacing part of the scandium with Zr.
  • the alloy used as the starting material in the present invention additionally comprises, in addition to aluminum and scandium, zirconium in an amount of 0.3% by weight.
  • zirconia alters the precipitated Al 3 Sc phase to Al 3 Sc 1 -x Zr x without losing its strength-increasing effect.
  • zirconium additive For example, the minimum cooling rate that must be maintained to produce a scandium and zirconium supersaturated solid solution can be reduced. The aging and thus the decline in the hardenability is slowed down. This allows the AlScZr alloy to withstand a certain temperature for an extended period of time before it begins to over age. At the same time, the use of zircon allows some reduction in the amount of scandium in the alloy, which is a relatively expensive alloying element due to its rarity.
  • the alloy comprises Mg and Mn.
  • the properties of the material produced from the starting material can be specifically influenced.
  • the addition of magnesium and manganese increases the strength of the aluminum material and thus enables the production of particularly hard materials.
  • the starting material comprises an alloy comprising the metals aluminum, magnesium, manganese, scandium and zirconium.
  • impurities are usually always included.
  • impurities are elements such as e.g. Alkali metals, Fe, Si, Be or In. These impurities may each be present in an amount of up to about 0.5% by weight, and in total in an amount of up to 2% by weight, based in each case on the total mass of the alloy.
  • impurities do not affect either the process of the invention or its use, or the AlSc material according to the invention.
  • an AlMgMnScZr alloy is used as a starting material, which consists mainly of aluminum and alloys of 4.3 wt .-% magnesium, 0.7 wt .-% scandium, 0.3 wt .-% zirconium and 0 , 5 wt .-% manganese, each based on the total weight of the alloy, wherein the proportion of impurities such as Fe, Si, Zn, etc., the total weight of the alloy is below 0.5 wt .-%.
  • the starting material is used as a particulate material, for example in the form of a powder, a granulate or in the form of flakes.
  • the starting material is introduced as a loose bed in the vacuum chamber.
  • the bulk density may for example be between 5 and 40%, 10 and 30% or 15 and 20%. However, it is also possible to precompact the starting material to a density of up to 50%.
  • the starting material used is a rapidly solidified material which has been obtained by means of a powder metallurgy rapid solidification processing ("rapid solidification processing").
  • the accelerated cooling makes it possible to dissolve considerably more scandium in the supersaturated solid solution than would be possible in the equilibrium state.
  • the cooling of the starting material at cooling rates of 100 to 10 9 K / s carried out, for example, at cooling rates of 1000 to 10 8 K / s, from 10 4 to 10 7 K / s or from 10 5 to 10 6 K / s.
  • Suitable processes for the production of a rapidly solidified starting material are, for example, atomization or atomization, the centrifugal mold process, splat cooling or the melt spinning process.
  • the starting material is produced by means of the melt spinning process.
  • the molten alloy is poured through a ceramic die onto a rapidly rotating, water-cooled metal cylinder.
  • the intimate contact between the forming metal film and the cylinder and its high thermal conductivity cause an extremely rapid cooling.
  • the metal film is lifted so that forms a continuous thin band.
  • the cooling rate correlates with the strip thickness, which in turn can be controlled by the roll speed.
  • the strip thickness can be, for example, between 0.01 and 1.00 mm.
  • the strip thickness is less than 0.1 mm.
  • the strip thus obtained can be comminuted to produce a particulate material.
  • the starting material produced by the melt spinning process can be further processed, for example in the form of granules.
  • a granulate produced by the melt spinning method has the advantage that it can be handled much easier and without special safety precautions compared to a powdery starting material, which poses a high risk of explosion due to its large surface area.
  • the use of a starting material produced by the melt spinning process allows a simplified and more efficient process management.
  • the introduced into the vacuum chamber precursor is degassed according to step (b) of the method according to the invention and / or the use according to the invention in a vacuum.
  • the starting material the surface of which may be contaminated with hydrogen, oxides and hydroxides and moisture, is treated in a vacuum so as to remove any such undesired contaminants.
  • the vacuum degassing is carried out in a suitable gastight container, also called vacuum chamber or recipient, wherein this one Gas outlet which is connected via a valve with a vacuum system.
  • the vacuum degassing is carried out at a vacuum of 0.1 to 10 -8 mbar.
  • the vacuum chamber can be controlled so that the vacuum in a range of 8-10 -2 to 10 -7 mbar, 5.10 -2 to 10 -6 mbar, 2.5 ⁇ 10 -2 to 10 -5 mbar or 10 - 2 to 10 -4 mbar.
  • the degassing process is carried out to increase the efficiency at an elevated temperature of 275 to 400 ° C, preferably at a temperature of 275 to 380 ° C or 275 to 350 ° C, more preferably at 290 ° C.
  • the vacuum degassing is carried out according to process steps (b) and (d) over a period of 15 minutes to 30 minutes.
  • the vacuum degassing according to process step (b) and / or (d) is at a vacuum of 0.05 mbar and a temperature of 290 ° C over a period of 15 to 30 minutes.
  • the vacuum degassing step (b) is interrupted by a step (c) in which the starting material is sparged with nitrogen.
  • the nitrogen is introduced into the vacuum chamber via the gas outlet to which the vacuum system is connected, the gas outlet being provided with a valve suitable for this purpose, e.g. with a 3/2-way valve.
  • the nitrogen gas can be inflated, for example, on the surface of the starting material or blown from below through the starting material.
  • Suitable is nitrogen containing less than 1000 ppm water, e.g. less than 500 ppm, less than 250 ppm, less than 100 ppm, less than 50 ppm, or less than 5 ppm of water.
  • the gassing of the starting material with nitrogen takes place over a period of 1 to 30 minutes, 2 to 20 minutes or 5 to 15 minutes. According to an exemplary embodiment, the gasification of the starting material takes place with nitrogen over a period of 10 min. According to another exemplary embodiment, the starting material is at least as long gassed with nitrogen until there is atmospheric pressure in the vacuum chamber.
  • Steps (b) and (c) may be performed one or more times in succession. According to one embodiment of the present invention, steps (b) and (c) are performed several times in succession, for example, 1 to 10 times, 2 to 9 times, 3 to 8 times, 4 to 7 times, or 5 to 6 times. Preferably, steps (b) and (c) are performed 5 times in succession.
  • a final vacuum degassing of the starting material takes place as process step (d).
  • the vacuum degassing is carried out as described under step (b).
  • the total duration of process steps (b), (c) and (d) is not more than 3000 min, 500 min, 300 min, 150 min or 100 min.
  • the starting material is compacted.
  • the compression can be done mechanically or by gas pressure.
  • suitable mechanical compression methods are cold pressing, isostatic pressing or vacuum pressing.
  • An example of a suitable gas pressure compression process is hot isostatic pressing (HIP).
  • HIP hot isostatic pressing
  • the compression can be done at atmospheric pressure or under vacuum.
  • the starting material is compressed in the vacuum chamber following the final degassing step (d).
  • the precursor material is compacted after the final degassing step (d) by means of mechanical vacuum pressing in the vacuum chamber.
  • the densified AlSc material may have a density greater than 80%, greater than 90%, greater than 95%, greater than 98%, or greater than 99%. According to a preferred embodiment, the density of the densified AlSc material is greater than 95%.
  • the resulting AlSc material can be transformed to produce semi-finished products and molded parts.
  • suitable forming processes are extruding or extrusion, rolling, forging, ironing, stamping, extrusion or deep drawing.
  • the AlSc material produced by the method according to the invention or its use has improved extrudability or extrudability. Due to its high temperature resistance, the extrusion of the AlSc material according to the invention can be carried out at higher temperatures, whereby the flow resistance or deformation resistance of the material decreases and this is better deformed.
  • An "AlSc material with improved extrudability" in the context of the present invention may preferably be further processed at a temperature of more than 320 ° C by means of extrusion without the tensile strength R m of the material compared to the starting material at room temperature, ie at 20 ° C, falls significantly.
  • the AlSc material according to the invention after being extruded at about 350 ° C.
  • the compacted AlSc material is further processed by extrusion at 320 to 400 ° C, preferably at 340 to 375 ° C or at about 350 ° C.
  • the materials produced by the method or its use according to the invention can be used, for example, for producing a welded, rolled, forged or extruded or extruded component for an aircraft, a sea-going vehicle or a motor vehicle. According to a preferred embodiment, the materials produced by the method according to the invention or its use are used for producing an extruded or extruded component for an aircraft, a sea-going vehicle or a motor vehicle.
  • the starting material used was an AlMgScZr alloy, which consisted mainly of aluminum and alloys of 4.3% by weight of magnesium, 0.7% by weight of scandium, 0.3% by weight of zirconium and 0.5% by weight. -% manganese is, in each case based on the total weight of the alloy.
  • the content of impurities such as Fe, Si, Zn, etc. in the total weight of the alloy was below 0.5 wt%.
  • the AlMgScZr alloy was used in the form of granules prepared by the melt spinning method.
  • the nominal strip thickness, which defines the achievable cooling rate during the melt spinning process, was 0.100 mm. From this, a maximum cooling rate (derived from the so-called dendrite arm spacing, which was determined by metallography) of about 2 ⁇ 10 5 K / s is calculated.
  • a material A was produced from the AlMgScZr starting material by a production process for AlMgSc materials according to the prior art (process A) and a material B by the process according to the invention (process B). The further processing of the two materials to round bars by extrusion was the same.
  • the starting material was placed in a recipient with a diameter of 31 mm as a loose bed with a height of 150 mm.
  • the recipient had a gas outlet, which was connected via a valve to a vacuum system.
  • the vacuum degassing was carried out at 5 ⁇ 10 -2 mbar and a temperature of 290 ° C. over a period of 120 minutes.
  • the starting material in the recipient was mechanically compacted into a bolt under vacuum in a 200 t press at a temperature of 290 ° C. and a pressing force of about 330 N / mm 2 .
  • the obtained stud had a density of about 99% and a height of 25 mm.
  • the starting material was placed in a recipient with a diameter of 31 mm as a loose bed with a height of 150 mm.
  • the recipient had a gas outlet connected to a vacuum system and a nitrogen source via a 3/2-way valve.
  • the vacuum degassing was at 5 ⁇ 10 -2 mbar and a temperature of 290 ° C over a period of 15 min performed.
  • dry nitrogen having a water content of less than 100 ppm was introduced into the recipient until atmospheric pressure prevailed in the vacuum chamber.
  • the vacuum degassing step described above and the subsequent sparging with nitrogen were carried out a total of 5 times. This was followed by a final vacuum degassing at 5 ⁇ 10 -2 mbar and a temperature of 290 ° C.
  • the total duration of the process was 300 min.
  • the starting material in the recipient was mechanically compacted into a bolt under vacuum in a 200 t press at a temperature of 290 ° C. and a pressing force of about 330 N / mm 2 .
  • the obtained stud had a density of about 99% and a height of 25 mm.
  • the obtained according to methods A and B and cooled to room temperature bolts were removed from the recipient and overdriven to a diameter of 30 mm and a length of 22 mm. Subsequently, the bolts were heated in an extrusion device in the oven to about 320 ° C, wherein heating time and holding time totaled 120 min.
  • the extrusion was carried out with a 200 t press with a continuously increasing extrusion speed, the initial speed was 250 mm / min and the final speed 4000 mm / min.
  • the pressed profile geometry was a round bar with a Diameter of 6 mm and a length of about 500 mm.
  • the compression ratio was 25: 1.
  • the results of the strength test show that the strength of the material B is largely constant. With increasing pressing speed, and the concomitant additional (adiabatic) material deformation heating, the strength of the material B produced by the process according to the invention is retained for a long time and drops slightly towards the end of the strand (by about 6%). On the other hand, in the material A produced by the method of the prior art, the strength at the end of the rod greatly drops. The loss of strength of the material A is already more than 11% in the strand center and even more than 25% at the strand end.
  • the inventive method and / or its use thus enables the production of scandium-alloyed aluminum materials, which have a consistently high material strength even at high deformation rates (extrusion rates).
  • the modified AlMgSc material according to the invention can be extruded at higher temperatures than the prior art without suffering the above-described large strength losses.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)

Claims (9)

  1. Utilisation d'un procédé, comprenant les étapes consistant à :
    a) introduire un matériau de base comprenant un alliage composé des métaux d'aluminium et de scandium dans une chambre à vide, le matériau de base étant un alliage AlMgMnScZr, composé de 4,3 % en poids de magnésium, 0,7 % en poids de scandium, 0,3 % en poids de zircon et 0,5 % en poids de manganèse, chacun par rapport au poids total de l'alliage, la proportion d'impuretés dans le poids total de l'alliage étant inférieure à 0,5 % en poids, le reste étant de l'aluminium,
    b) dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    c) gazer le matériau de base avec de l'azote pendant une durée de 1 à 30 min, l'azote contenant une teneur en eau inférieure à 1 000 ppm, et
    d) enfin dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    pour fabriquer un matériau à base d'aluminium allié avec du scandium qui peut être sollicité à haute température, le procédé comprenant une autre étape supplémentaire (e), dans laquelle le matériau de base est comprimé dans la chambre à vide directement après l'étape (d).
  2. Utilisation selon la revendication 1, dans laquelle le matériau à base d'aluminium allié avec du scandium qui peut être sollicité à haute température présente une capacité d'extrusion améliorée.
  3. Utilisation selon la revendication 1 ou 2, dans laquelle le matériau de base a été fabriqué à partir d'un procédé de filage à l'état fondu.
  4. Utilisation selon une des revendications précédentes, dans laquelle le matériau de base existe sous la forme de granulat.
  5. Utilisation selon une des revendications précédentes, dans laquelle les étapes (b) et (c) sont réalisées 1 à 10 fois les unes après les autres.
  6. Procédé de fabrication d'un matériau à base d'aluminium allié avec du scandium qui peut être sollicité à haute température, comprenant les étapes consistant à :
    a) introduire un matériau de base comprenant un alliage composé des métaux d'aluminium et de scandium dans une chambre à vide, le matériau de base étant un alliage AlMgMnScZr, composé de 4,3 % en poids de magnésium, 0,7 % en poids de scandium, 0,3 % en poids de zircon et 0,5 % en poids de manganèse, chacun par rapport au poids total de l'alliage, la proportion d'impuretés dans le poids total de l'alliage étant inférieure à 0,5 % en poids, le reste étant de l'aluminium, dans lequel le matériau de base a été fabriqué selon le procédé de filage à l'état fondu,
    b) dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    c) gazer le matériau de base avec de l'azote pendant une durée de 1 à 30 min, l'azote contenant une teneur en eau inférieure à 1 000 ppm, et
    d) enfin dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    le procédé comprenant une autre étape supplémentaire (e), dans laquelle le matériau de base est comprimé dans la chambre à vide directement après l'étape (d).
  7. Matériau à base d'aluminium allié avec du scandium qui peut être sollicité à haute température, qui peut être obtenu par le procédé comprenant les étapes consistant à :
    a) introduire un matériau de base comprenant un alliage composé des métaux d'aluminium et de scandium dans une chambre à vide, le matériau de base étant un alliage AlMgMnScZr, composé de 4,3 % en poids de magnésium, 0,7 % en poids de scandium, 0,3 % en poids de zircon et 0,5 % en poids de manganèse, chacun par rapport au poids total de l'alliage, la proportion d'impuretés dans le poids total de l'alliage étant inférieure à 0,5 % en poids, le reste étant de l'aluminium, dans lequel le matériau de base a été fabriqué selon le procédé de filage à l'état fondu,
    b) dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    c) gazer le matériau de base avec de l'azote pendant une durée de 1 à 30 min, l'azote contenant une teneur en eau inférieure à 1 000 ppm, et
    d) enfin dégazer sous vide le matériau de base sous un vide de 0,1 à 10-8 mbar et à une température de 275 à 400 °C pendant une durée de 15 à 30 min,
    le procédé comprenant une autre étape supplémentaire (e), dans laquelle le matériau de base est comprimé dans la chambre à vide directement après l'étape (d).
  8. Utilisation d'un matériau selon la revendication 7 pour fabriquer un composant soudé, laminé, extrudé ou forgé pour un aéronef, un vaisseau ou un véhicule automobile.
  9. Composant soudé, laminé, extrudé ou forgé pour un aéronef, un vaisseau ou un véhicule automobile constitué d'un matériau selon la revendication 7.
EP11761484.2A 2010-07-29 2011-07-25 Alliage à base d'aluminium contenant du scandium pou hautes températures et avec une extrudabilite améliorée Active EP2598664B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010032768A DE102010032768A1 (de) 2010-07-29 2010-07-29 Hochtemperaturbelastbarer mit Scandium legierter Aluminium-Werkstoff mit verbesserter Extrudierbarkeit
PCT/DE2011/001504 WO2012013185A1 (fr) 2010-07-29 2011-07-25 Matériau à base d'un alliage d'aluminium et de scandium, résistant aux hautes températures, présentant une aptitude améliorée à l'extrusion

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EP2598664A1 EP2598664A1 (fr) 2013-06-05
EP2598664B1 true EP2598664B1 (fr) 2017-01-18

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DE202016001530U1 (de) * 2016-03-09 2017-06-12 TWI GmbH Pulvermetallurgisch hergestelltes manganhaltiges Vormaterial zur Herstellung einer Leichtmetalllegierung sowie seine Verwendung
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DE102010032768A1 (de) 2012-02-02
US20130143070A1 (en) 2013-06-06
EP2598664A1 (fr) 2013-06-05

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