EP2598664A1 - Aluminium material which can be exposed to high temperatures, is alloyed with scandium and has improved extrudability - Google Patents
Aluminium material which can be exposed to high temperatures, is alloyed with scandium and has improved extrudabilityInfo
- Publication number
- EP2598664A1 EP2598664A1 EP11761484.2A EP11761484A EP2598664A1 EP 2598664 A1 EP2598664 A1 EP 2598664A1 EP 11761484 A EP11761484 A EP 11761484A EP 2598664 A1 EP2598664 A1 EP 2598664A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- starting material
- scandium
- vacuum
- alloy
- use according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 104
- 229910052706 scandium Inorganic materials 0.000 title claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 48
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 title claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000004411 aluminium Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 61
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 57
- 239000000956 alloy Substances 0.000 claims abstract description 57
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 22
- 150000002739 metals Chemical class 0.000 claims abstract description 17
- 239000002243 precursor Substances 0.000 claims abstract description 15
- 239000007858 starting material Substances 0.000 claims description 66
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 229910052726 zirconium Inorganic materials 0.000 claims description 14
- 238000002074 melt spinning Methods 0.000 claims description 11
- 239000011777 magnesium Substances 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 238000002309 gasification Methods 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052691 Erbium Inorganic materials 0.000 claims description 3
- 229910052693 Europium Inorganic materials 0.000 claims description 3
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 229910052771 Terbium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 2
- 229910052689 Holmium Inorganic materials 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 description 14
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 11
- 238000001816 cooling Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 238000007906 compression Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007872 degassing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- -1 scandium aluminum Chemical compound 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241000282941 Rangifer tarandus Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- CUOITRGULIVMPC-UHFFFAOYSA-N azanylidynescandium Chemical compound [Sc]#N CUOITRGULIVMPC-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000007782 splat cooling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based 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.
- Scandium alloyed aluminum-magnesium materials are known for example from US 3619181, US 6258318 Bl or EP 0918095 AI.
- a process for producing scandium or zirconium-alloyed aluminum sheet materials having increased fracture toughness is described in DE 102 48 594 A1.
- CONFIRMATION COPY wrote. From US 4,104,061 a method for Entfer ⁇ tion of impurities from a metal alloy is known in which an alloy is subjected to several cycles consisting of a vacuum degassing and a gassing with a cleaning gas.
- 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 Hochtemperaturbe ⁇ loadability 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, which makes it possible to reduce the amount of scandium used ver ⁇ .
- 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. Moreover, it is desirable to use an alloy with scandium aluminum material determine ready ⁇ which can be converted at high temperatures without a loss of cohesion of the alloy occurs. Furthermore, it is desirable that the scandium alloyed aluminum material have improved extrusion properties and can be processed at high press speeds.
- a use of a method comprising the steps of: (a) introducing a precursor material comprising an alloy comprising the metals aluminum and scandium into a vacuum chamber, (b) vacuum gases of the primary material, (c) gasification of the primary material Nitrogen, and (d) final vacuum dewatering of the primary material to produce a high temperature, aluminum-scandium-alloyed material.
- a method of producing 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, (b) vacuum deg Starting material, (c) gasification of the starting material with nitrogen, and (d) final vacuum degassing of the primary material.
- 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; was prepared by the melt spinning process, (b) vacuum-degassing of the raw material, (c) gassing the Vormate ⁇ rials with nitrogen, and (d) final Vakuumentga ⁇ sen of the starting material.
- a high temperature resilient, scandium alloyed ⁇ ter aluminum material is provided which is obtainable by a process which includes fully the steps of: (a) introducing a precursor material comprising an alloy comprising the metals aluminum and Scandium in a vacuum chamber, (b) vacuum gases of the starting material, (c) gassing of the starting material with nitrogen, and (d) final vacuum degassing of the starting material.
- a high temperature resilient, scandium alloyed ⁇ ter aluminum material is provided which is obtainable by a process which includes fully the steps of: (a) introducing a precursor material comprising a
- An alloy comprising the metals aluminum and scandium in a vacuum chamber, wherein the starting material after 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 compression ratios. This is advantageous in ⁇ example 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 enable costificatware- reindeer.
- the method and its use has the advantage that the gain "in situ” is performed and for example, no nanoscale reinforcing phases ⁇ powder must be used that are difficult to process and are 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 at room temperature has similar strength properties as before the temperature.
- a "high-temperature-loadable AlSc material” in the sense of the present invention preferably exhibits a drop in tensile strength R m of less than 5% and / or after a temperature exposure of at room temperature after a temperature of 350 ° C. compared to the starting material 375 ° C compared to the starting material at room temperature, a drop in the tensile strength R m of less than 10%.
- alloyed aluminum material comprising the following Ver ⁇ method steps: ⁇ a) introducing a precursor material comprising an alloy comprising the metals Al and Sc in a vacuum chamber (b) vacuum-degassing of the raw material, (c) gassing the precursor material with nitrogen, and (d ) from ⁇ closing vacuum degassing of the raw material.
- the primary material used in the process comprises an alloy comprising the metals aluminum and scandium.
- the amount of scandium in the alloy may be between 0.1 and 10.0% by weight, based on the total mass of the alloy, for example between 0.2 and 2.0% by weight or between 0.4 and 1.5% by weight .-%.
- the alloy contains Scandium in an amount of 0.6 to 1.0 wt .-%, based on the total mass of the alloy.
- the alloy additionally comprises at least one further optional metal having properties similar to scandium in aluminum materials, such as Zr, Ti, Y, Hf, Ta, La, Ce, Tb, Nd, Eu, Gd, Dy , Ho and Er.
- the amount of one or more of these elements in the alloy can each be up to 5 wt .-% and a total of up to 10 parts by weight, based on the total weight of the alloy, These elements can behave additively with the scandium, ie they can The scandium be forcibly dissolved 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 one of the above elements.
- the alloy used as the starting material in addition to aluminum and scandium, additionally comprises zirconium.
- the amount of zirconium in the alloy can be between 0.05 and 5.0 parts by weight, based on the total mass of the alloy, for example between 0.1 and 1.0% by weight or 0.2 and 0.7% by weight .-%.
- the alloy contains zirconium in an amount of 0.3-0.5% by weight.
- Al 3 Sci- x r x is modified without losing its strength-increasing effect.
- the minimum cooling rate can be reduced, which must be maintained in order to produce a mixed with scandium and zirconium mixed crystal.
- the aging and thus the decline in the hardenability is slowed down.
- 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 additionally or alternatively to the above-mentioned alloying elements comprises at least one further optional element selected from the group consisting of Mg, Zn, Mn, Ag, Li, Cu, Si, Cr or Ca.
- the amount of these elements in the alloy can be up to 10% by weight for Mg and up to 5% by weight for the other elements, and up to 25% in total, based in each case on the total weight of the alloy.
- the properties of the material produced from the starting material can be influenced in a targeted manner. For example, the addition of lithium or calcium reduces the overall density of the material produced and thus enables the production of particularly lightweight materials.
- the addition of magnesium and / or manganese increases the strength of the aluminum material and thus enables the production of particularly hard materials.
- the starting material comprising an alloy comprising the metals Alumini ⁇ to, magnesium and scandium.
- the starting material comprising an alloy comprising the metals aluminum, magnesium, manganese, scandium, and zirconium.
- Ver ⁇ impurities are elements such as 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. However, such 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 the 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., based on 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. According to In one embodiment, the starting material is considered loose
- 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 primary material to a density of up to 50%.
- a rapidly solidified material is used, which by means of a powder metallurgy rapid solidification Ver ahrens
- the material is produced by means of the melt spinning process.
- the molten alloy is poured through a ceramic nozzle 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 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 material produced by the melt-spinning process can be further processed, for example, in the form of granules.
- Such produced by the melt spinning process granules has the advantage that it can be handled much easier and without special security precautions compared to ei ⁇ nem powdery starting material, which emanates due to its large surface high risk of explosion.
- the use of a precursor material produced by the Schmelzpinn method allows a simplified and effi ⁇ entere process control.
- 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 In the degassing process, the starting material, its surface with hydrogen, oxides and hydroxides and
- Moisture may be contaminated in a vacuum to remove any such unwanted 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 is in a range of 8-10 "2 to 10 ⁇ 7 mbar, 5-10 " 2 to 10 "6 mbar,
- the degassing process can be carried out to increase the efficiency at an elevated temperature.
- the Vakuument ⁇ gases can be carried out at a temperature of 100 to 400 ° C, preferably at a temperature of 250 to 380 ° C or 275-350 ° C, particularly preferably at 290 ° C.
- the vacuum degassing may, for example, be carried out over a period of 1 to 3,000 minutes, 5 to 500 minutes or 10 to 100 minutes. According to an exemplary embodiment, the vacuum degassing according to process step (b) and / or (d) is carried out over a period of 15 minutes to 30 minutes.
- the vacuum degassing according to process step (b) and / or ⁇ d) 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 ege valve.
- the nitrogen gas can be inflated, for example, onto the surface of the starting material or else blown through the starting material from below.
- dry nitrogen is used to feed the prematerial.
- nitrogen containing less than 1000 ppm of 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 can, for example, take 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 carried out 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.
- Vormate ⁇ rial After the final vacuum degassing the Vormate ⁇ rial can be compacted.
- the compression can be done mechanically or by gas pressure. Examples of suitable mechanical compression methods are cold presses,
- 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 primary material is compacted in the vacuum chamber subsequent to 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 converted to produce semi-finished products and molded parts.
- suitable transformation driving are extruding or extruding, rolling, forging, ironing, stamping, extruding 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.
- a "AlSc material with improved extrudability" in the sense of vorlie ⁇ constricting invention may preferably be further processed at a temperature of more than 320 ° C by extrusion without the tensile strength R m of the material relative to the starting material at room temperature, ie at 20 °
- the AlSc material according to the invention after being extruded at about 350 ° C. from the starting material at room temperature, exhibits a drop in tensile strength R m of less than 5% and / or after extrusion at about 375 ° C. the starting material at room temperature, a drop in the tensile strength R m of less than 10%.
- the densified AlSc material is further processed by extrusion at 320 to 400 ° C, preferably at 340 to 375 ° C or at about 35Q ° C.
- the materials prepared by the process according to the invention or its use can be used for producing a welded, rolled, marmie ⁇ ignited or extruded or extruded component for an aircraft, a vessel or a vehicle, for example.
- 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 consisting essentially 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, each based on the total weight of the alloy.
- the amount of impurities such as Fe, Si, Zn, etc. in the total weight of the alloy was below 0.5% by weight.
- the AlMgScZr alloy was set in a ⁇ form of a granulate, which was 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.
- a maximum cooling rate (derived from the so-called dendrite arm spacing, which was determined by metallography) is calculated as about 2 ⁇ 10 5 K / s.
- 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 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 starting material was placed in a 31 mm diameter recipient as a loose bed with a height of 150 mm.
- the recipient had a gas outlet which was 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 carried out over a period of 15 min.
- dry nitrogen with a water content of less than 100 ppm was introduced into the recipient for the gasification of the starting material 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 bolts obtained according to process A or B and cooled to Jardintem ⁇ temperature were removed from the vacuum chamber and rotated to a diameter of 30 mm and a length of 22 mm. Subsequently, the bolts were heated in an extruder 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 decreases only 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.
- a method of making a high temperature scandium alloyed aluminum material comprising the steps of:
- the alloy additionally contains magnesium.
- the alloy additionally comprises at least one further optional metal selected from the group comprising Zr, Ti, Y, Hf, Ta, La, Ce, Tb, Nd, Eu, Gd, Dy, Ho and Er and / or additionally at least one further optional element of the group comprising Zn, Mn, Ag, Li, Cu, Si, or Ca comprises.
- the vacuum degassing after step (b) and / or (d) is carried out at a vacuum of 0.1 to 10 "8 mbar.
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
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- Extrusion Of Metal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010032768A DE102010032768A1 (en) | 2010-07-29 | 2010-07-29 | High-temperature scandium alloyed aluminum material with improved extrudability |
PCT/DE2011/001504 WO2012013185A1 (en) | 2010-07-29 | 2011-07-25 | Aluminium material which can be exposed to high temperatures, is alloyed with scandium and has improved extrudability |
Publications (2)
Publication Number | Publication Date |
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EP2598664A1 true EP2598664A1 (en) | 2013-06-05 |
EP2598664B1 EP2598664B1 (en) | 2017-01-18 |
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ID=44718971
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EP11761484.2A Active EP2598664B1 (en) | 2010-07-29 | 2011-07-25 | High temperature scandium-containing aluminium alloy with improved extrudability |
Country Status (4)
Country | Link |
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US (1) | US20130143070A1 (en) |
EP (1) | EP2598664B1 (en) |
DE (1) | DE102010032768A1 (en) |
WO (1) | WO2012013185A1 (en) |
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GB201112028D0 (en) | 2011-07-13 | 2011-08-31 | Gas2 Ltd | Fixed bed fischer tropsch reactor |
EP2871642B1 (en) * | 2013-11-06 | 2019-08-28 | Airbus Defence and Space GmbH | Solar cell interconnector and manufacturing method thereof |
US9945018B2 (en) | 2014-11-26 | 2018-04-17 | Honeywell International Inc. | Aluminum iron based alloys and methods of producing the same |
DE202016001530U1 (en) * | 2016-03-09 | 2017-06-12 | TWI GmbH | Manganese-containing starting material produced by powder metallurgy for producing a light metal alloy and its use |
CN107081507A (en) * | 2017-07-05 | 2017-08-22 | 合肥万之景门窗有限公司 | A kind of welding procedure of door and window aluminium alloy |
SI25352A (en) | 2017-09-13 | 2018-07-31 | UNIVERZA V MARIBORU Fakulteta za Strojništvo | Production of high-strength and temperature resistant aluminum alloys fortified with double excretion |
CN114672686B (en) * | 2022-03-21 | 2022-10-28 | 华中科技大学 | Preparation method of additional nano-particle reinforced cast aluminum-lithium alloy |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US3619181A (en) | 1968-10-29 | 1971-11-09 | Aluminum Co Of America | Aluminum scandium alloy |
US4104061A (en) | 1976-10-21 | 1978-08-01 | Kaiser Aluminum & Chemical Corporation | Powder metallurgy |
US5211910A (en) * | 1990-01-26 | 1993-05-18 | Martin Marietta Corporation | Ultra high strength aluminum-base alloys |
ES2192257T3 (en) | 1997-11-20 | 2003-10-01 | Alcan Tech & Man Ag | PROCEDURE FOR MANUFACTURE OF A STRUCTURAL COMPONENT PART BASED ON AN ALUMINUM ALLOY MOLDED BY PRESSURE COLADA. |
DE19838017C2 (en) | 1998-08-21 | 2003-06-18 | Eads Deutschland Gmbh | Weldable, corrosion resistant AIMg alloys, especially for traffic engineering |
DE10248594B4 (en) | 2001-12-14 | 2006-04-27 | Eads Deutschland Gmbh | Making aluminum sheet alloyed with scandium and zirconium and having high fracture resistance in e.g. aerospace applications, employs roller casting process and specified hot-working |
US7648593B2 (en) * | 2003-01-15 | 2010-01-19 | United Technologies Corporation | Aluminum based alloy |
AU2006210790B2 (en) * | 2005-02-01 | 2011-03-31 | Timothy Langan | Aluminum-zinc-magnesium-scandium alloys and methods of fabricating same |
US7875132B2 (en) * | 2005-05-31 | 2011-01-25 | United Technologies Corporation | High temperature aluminum alloys |
US8778099B2 (en) * | 2008-12-09 | 2014-07-15 | United Technologies Corporation | Conversion process for heat treatable L12 aluminum alloys |
US20100143177A1 (en) * | 2008-12-09 | 2010-06-10 | United Technologies Corporation | Method for forming high strength aluminum alloys containing L12 intermetallic dispersoids |
US20110044844A1 (en) * | 2009-08-19 | 2011-02-24 | United Technologies Corporation | Hot compaction and extrusion of l12 aluminum alloys |
-
2010
- 2010-07-29 DE DE102010032768A patent/DE102010032768A1/en not_active Withdrawn
-
2011
- 2011-07-25 EP EP11761484.2A patent/EP2598664B1/en active Active
- 2011-07-25 WO PCT/DE2011/001504 patent/WO2012013185A1/en active Application Filing
-
2013
- 2013-01-29 US US13/752,834 patent/US20130143070A1/en not_active Abandoned
Non-Patent Citations (1)
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See references of WO2012013185A1 * |
Also Published As
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US20130143070A1 (en) | 2013-06-06 |
EP2598664B1 (en) | 2017-01-18 |
WO2012013185A1 (en) | 2012-02-02 |
DE102010032768A1 (en) | 2012-02-02 |
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