EP0256450A1 - Process for manufacturing powder compacts with a high resistance and relatively low density from a heat-resisting aluminium alloy - Google Patents
Process for manufacturing powder compacts with a high resistance and relatively low density from a heat-resisting aluminium alloy Download PDFInfo
- Publication number
- EP0256450A1 EP0256450A1 EP87111463A EP87111463A EP0256450A1 EP 0256450 A1 EP0256450 A1 EP 0256450A1 EP 87111463 A EP87111463 A EP 87111463A EP 87111463 A EP87111463 A EP 87111463A EP 0256450 A1 EP0256450 A1 EP 0256450A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- heat
- inert gas
- green compact
- relatively low
- 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
Classifications
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
Definitions
- Heat-resistant aluminum alloys which are produced from powders obtained at high cooling rates by atomizing a melt. High content of alloy components not permitted under the usual solidification conditions, e.g. Fe and Cr.
- the invention relates to the production of aluminum alloy powders and the production of moldings from these powders.
- Aluminum alloys which are suitable for the production of powders from melts by means of gas jet atomization using very high cooling speeds (10 ° C./s and more) and can be used for the production of heat-resistant workpieces, have become known in numerous variations.
- An important group are the polynary alloys of the type Al / Fe / X, which usually have relatively high iron contents, where X denotes at least one of the elements Ti, Zr, Hf, V, Nb, Cr, Mo, W.
- the shape and size distribution of the powder particles play an important role in the production of compacts.
- the result is closely related to the gaseous atomizing agent used.
- Spherical powders result in low mechanical strength when compressed into green compacts, since the particles are only slightly deformed. At the same time, however, the density is relatively high, which makes it difficult to degas and expel unwanted foreign substances during further processing. In contrast, non-spherical powders provide green bodies of high strength combined with low density. However, the content of substances to be degassed (oxygen, water, hydrogen) is high.
- the invention has for its object to provide a method for producing an aluminum alloy powder by atomizing a melt, which provides a green compact with the highest possible strength and at the same time low relative density (based on the theoretical maximum value of 100%) during compression.
- the melt was atomized in a device by means of a gas stream to a powder with a maximum particle diameter of 50 ⁇ m.
- Inert gases nitrogen, argon
- oxygen oxygen
- Example II Analogously to Example I, the melt was atomized into a powder in various ways and subsequently compacted. Samples for determining the compressive strength and the relative density were worked out from the compact. The results are as follows:
- the green pressed bodies of the above exemplary embodiments were also subjected to a degassing process. It was found that the degassing times of the powders produced with inert atomizing gas with the addition of oxygen were between those with inert atomizing gas and those with air. Before the final thermomechanical treatment (hot pressing, extrusion), in which they reach their full, 100% density, the green pressed bodies should advantageously be degassed at a temperature of 350 to 400 ° C. for 1 to 10 hours.
- the atomizing gas can be an inert gas such as nitrogen, argon or helium, to which 0.5 to 2% by volume of oxygen is added. It can also be a mixture of at least two of the aforementioned gases.
- the method is preferably carried out in such a way that in the first step (atomization in the gas stream) a powder is produced which contains relatively small proportions of coarser, non-spherical particles and comparatively high proportions of fine spherical particles.
- This can be achieved by a suitable choice of the gas composition, in particular the addition of oxygen.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Materials For Medical Uses (AREA)
- Dental Preparations (AREA)
Abstract
Ein grüner Presskörper hoher Festigkeit und niedriger relativer Dichte aus einer warmfesten Aluminiumlegierung des Typs Al/Fe/X oder Al/Cr/X mit X = Ti, Ce, Zr, Hf, V, Nb, Cr, Mo, W wird pulvermetallurgisch dadurch hergestellt, dass eine Legierungsschmelze mittels eines inerten Gasstrahls, dem 0,5 bis 2 Vol.-% Sauerstoff beigemengt sind, zu feinen Partikeln zerstäubt wird und das derart erzeugte Pulver verdichtet wird. Als inertes Gas kann Stickstoff, Argon oder Helium verwendet werden. Der grüne Presskörper ist bevorzugt aus einem geringen Anteil gröberer, nicht-sphärischer und einem höheren Anteil feinerer, sphärischer Partikel aufgebaut.A green compact of high strength and low relative density made of a heat-resistant aluminum alloy of the type Al / Fe / X or Al / Cr / X with X = Ti, Ce, Zr, Hf, V, Nb, Cr, Mo, W is produced by powder metallurgy that an alloy melt is atomized into fine particles by means of an inert gas jet, to which 0.5 to 2% by volume of oxygen has been added, and the powder produced in this way is compressed. Nitrogen, argon or helium can be used as the inert gas. The green compact is preferably made up of a small proportion of coarser, non-spherical and a higher proportion of finer, spherical particles.
Description
Warmfeste Aluminiumlegierungen, welche aus mit hoher Abkühlungsgeschwindigkeit durch Zerstäuben einer Schmelze gewonnenen Pulvern hergestellt werden. Hoher Gehalt an unter sonst üblichen Erstarrungsbedingungen nicht zulässigen Legierungsbestandteilen wie z.B. Fe und Cr.Heat-resistant aluminum alloys which are produced from powders obtained at high cooling rates by atomizing a melt. High content of alloy components not permitted under the usual solidification conditions, e.g. Fe and Cr.
Die Erfindung bezieht sich auf die Erzeugung von Aluminiumlegierungspulvern und die Herstellung von Formkörpern aus diesen Pulvern.The invention relates to the production of aluminum alloy powders and the production of moldings from these powders.
Insbesondere betrifft sie ein pulvermetallurgisches Verfahren zur Herstellung eines grünen Presskörpers hoher Festigkeit und niedriger relativer, auf den porenlosen Zustand bezogener Dichte aus einer warmfesten Aluminiumlegierung des Typs Al/Fe/X oder Al/Cr/X, wobei X = Ti, Zr, Hf, V, Nb, Cr, Mo, W sein kann.In particular, it relates to a powder metallurgical process for producing a green compact of high strength and low relative density, based on the non-porous state, from a heat-resistant aluminum alloy of the type Al / Fe / X or Al / Cr / X, where X = Ti, Zr, Hf, V, Nb, Cr, Mo, W.
Aluminiumlegierungen, welche sich für die Erzeugung von Pulvern aus Schmelzen mittels Gasstrahlzerstäubung unter Anwendung sehr hoher Abkühlungsgeschwindigkeiten (10⁵°C/s und mehr) eignen und für die Herstellung warmfester Werkstücke verwenden lassen, sind in zahlreichen Variationen bekannt geworden. Eine bedeutende Gruppe stellen die polynären, meist relativ hohe Eisengehalte aufweisenden Legierungen des Typs Al/Fe/X dar, wobei X mindestens eines der Elemente Ti, Zr, Hf, V, Nb, Cr, Mo, W bedeutet.Aluminum alloys, which are suitable for the production of powders from melts by means of gas jet atomization using very high cooling speeds (10 ° C./s and more) and can be used for the production of heat-resistant workpieces, have become known in numerous variations. An important group are the polynary alloys of the type Al / Fe / X, which usually have relatively high iron contents, where X denotes at least one of the elements Ti, Zr, Hf, V, Nb, Cr, Mo, W.
Bei der Herstellung von Presskörpern spielt unter anderem die Form und die Grössenverteilung der Pulverpartikel eine wichtige Rolle. Das Ergebnis hängt eng mit dem verwendeten gasförmigen Zerstäubungsmittel zusammen.The shape and size distribution of the powder particles play an important role in the production of compacts. The result is closely related to the gaseous atomizing agent used.
Wird ein inertes Gas (N, Ar, He) verwendet, wird die Oxydation und die Aufnahme von Wasser und Wasserstoff weitgehend unterdrückt. Es werden vorwiegend sphärische Partikel erzeugt.If an inert gas (N, Ar, He) is used, the oxidation and the absorption of water and hydrogen are largely suppressed. Mainly spherical particles are generated.
Wird dagegen Luft als Zerstäubungsmittel verwendet, dann erfolgt eine beträchtliche Oxydation und Hydratation der Pulverpartikel. Letztere haben vorwiegend längliche und verzweigte unregelmässige, nicht-sphärische Form (Vergl. J. Meunier, ASTM Symposium on Rapidly Solidified Powder Aluminium Alloys, Philadelphia, 1984; Y.W. Kim, W.M. Griffith, F.H. Froes, J. of Metals, August 1985, 27.; G. Stanieck, Aluminium 60, 1984, 3; R.F. Singer, W. Oliver, W.D. Nix, Met. Trans. 11A, 1980, 1985; S.T. Morgan et al. in: M.S. Koczak und G.J. Hildeman, High Strength Powder Metallurgy Aluminium Alloys, 1982, TMSAIME).On the other hand, if air is used as an atomizing agent, the powder particles undergo considerable oxidation and hydration. The latter have predominantly elongated and branched irregular, non-spherical shape (see J. Meunier, ASTM Symposium on Rapidly Solidified Powder Aluminum Alloys, Philadelphia, 1984; YW Kim, WM Griffith, FH Froes, J. of Metals, August 1985, 27 .; G. Stanieck, Aluminum 60, 1984, 3; RF Singer, W. Oliver, WD Nix, Met. Trans. 11A, 1980, 1985; ST Morgan et al. In: MS Koczak and GJ Hildeman, High Strength Powder Metallurgy Aluminum Alloys, 1982, TMSAIME).
Sphärische Pulver ergeben bei der Verdichtung zu grünen Presskörpern geringe mechanische Festigkeit, da die Partikel nur wenig verformt werden. Gleichzeitig ist aber die Dichte verhältnismässig hoch, was die Entgasung und Austreibung unerwünschter Fremdstoffe bei der Weiterverarbeitung erschwert. Demgegenüber liefern nicht-sphärische Pulver grüne Körper hoher Festigkeit kombiniert mit geringer Dichte. Dabei ist jedoch der Gehalt an zu entgasenden Stoffen (Sauerstoff, Wasser, Wasserstoff) hoch.Spherical powders result in low mechanical strength when compressed into green compacts, since the particles are only slightly deformed. At the same time, however, the density is relatively high, which makes it difficult to degas and expel unwanted foreign substances during further processing. In contrast, non-spherical powders provide green bodies of high strength combined with low density. However, the content of substances to be degassed (oxygen, water, hydrogen) is high.
Aus dem oben Gesagten geht hervor, dass die Pulverherstellung nach den bekannten Methoden im Hinblick auf die anzustrebenden Eigenschaften der fertigen Werkstücke zu wünschen übrig lassen. Entweder ist die mechanische Festigkeit der grünen Presskörper zu gering oder deren Gehalte an eingeschlossenen Schadstoffen zu hoch. Beides führt im Verlauf der Weiterverarbeitung zu Werkstücken mit ungenügenden, zum mindesten nicht mit den angestrebten Werten vereinbarten Festigkeitseigenschaften.From what has been said above, it can be seen that powder production according to the known methods leaves something to be desired in terms of the desired properties of the finished workpieces. Either the mechanical strength of the green compacts is too low or their levels of trapped pollutants are too high. In the course of further processing, both lead to workpieces with insufficient strength properties, at least not in agreement with the desired values.
Es besteht daher ein grosses Bedürfnis nach einer Verbesserung der Herstellungsverfahren für Pulver, welche zu besseren Endprodukten führen.There is therefore a great need to improve the manufacturing processes for powders, which lead to better end products.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Erzeugung eines Aluminiumlegierungspulvers durch Zerstäuben einer Schmelze anzugeben, welches bei der Verdichtung einen grünen Presskörper mit möglichst hoher Festigkeit und gleichzeitig niedriger relativer Dichte (bezogen auf den theoretischen Höchstwert von 100 %) liefert.The invention has for its object to provide a method for producing an aluminum alloy powder by atomizing a melt, which provides a green compact with the highest possible strength and at the same time low relative density (based on the theoretical maximum value of 100%) during compression.
Diese Aufgabe wird dadurch gelöst, dass beim eingangs erwähnten Verfahren eine entsprechende Legierungsschmelze mittels eines Gasstrahls bestehend aus einem inerten Gas, welchem 0,5 bis 2 Vol.-% Sauerstoff beigemengt ist, zu feinen Partikeln zerstäubt wird und dass das derart erzeugte Pulver einer Verdichtung unterworfen wird.This problem is solved in that at the beginning mentioned method, a corresponding alloy melt is atomized into fine particles by means of a gas jet consisting of an inert gas, to which 0.5 to 2% by volume of oxygen is admixed, and that the powder produced in this way is subjected to compression.
In diesem Zusammenhang wird darauf hingewiesen, dass die vollständige Entfernung des Wassers und des Wasserstoffs aus den hydrolysierten Al₂O₃-Oberflächenschichten der Pulverpartikel bei ca. 400°C während des Entgasungsvorganges im Falle der erfindungsgemässen Verwendung eines mit Sauerstoff dotierten Zerstäubungsgases bei der Pulvererzeugung schneller vor sich geht als im Falle konventioneller Zerstäubung mit Luft.In this context, it should be noted that the complete removal of the water and hydrogen from the hydrolyzed Al₂O₃ surface layers of the powder particles at about 400 ° C during the degassing process in the case of the use of an oxygen-doped atomizing gas according to the invention in the powder production is faster than in the case of conventional atomization with air.
Die Erfindung wird anhand der nachfolgenden Ausführungsbeispiele erläutert.The invention is explained using the following exemplary embodiments.
Es wurde eine Aluminiumlegierung der nachfolgenden Zusammensetzung erschmolzen:
Fe = 9 Gew.-%
V = 3,5 Gew.-%
Al = RestAn aluminum alloy with the following composition was melted:
Fe = 9% by weight
V = 3.5% by weight
Al = rest
Die Schmelze wurde in einer Vorrichtung mittels eines Gasstromes zu einem Pulver von maximal 50 µm Partikeldurchmesser zerstäubt. Als Zerstäubungsgase wurden inerte Gase (Stickstoff, Argon) mit und ohne Sauerstoffzusatz verwendet.The melt was atomized in a device by means of a gas stream to a powder with a maximum particle diameter of 50 μm. Inert gases (nitrogen, argon) with and without the addition of oxygen were used as atomizing gases.
Einige Hundert Gramm des Pulvers wurden in einen Gummi beutel abgefüllt, verschlossen und kalt verdichtet. Aus dem grünen Presskörper wurde ein zylindrischer Prüfkörper von 20 mm Durchmesser und 30 mm Höhe herausgearbeitet und einem Druckversuch unterworfen. Desgleichen wurde die jeweilige Dichte bezogen auf den theoretischen Wert bestimmt.A few hundred grams of the powder were put in a gum filled, sealed and cold sealed. A cylindrical test specimen with a diameter of 20 mm and a height of 30 mm was worked out from the green compact and subjected to a pressure test. Likewise, the respective density was determined based on the theoretical value.
Es kann gezeigt werden, dass die aus Pulvern mit Sauerstoffzusatz hergestellten grünen Presskörper bei vergleichsweise geringerer Dichte wesentlich höhere Festigkeiten aufwiesen als diejenigen aus Pulvern ohne Sauerstoffzusatz (reine inerte Zerstäubungsgase).It can be shown that the green compacts made from powders with the addition of oxygen, with a comparatively lower density, had significantly higher strengths than those from powders without the addition of oxygen (pure inert atomizing gases).
Es wurde eine Legierung der nachfolgenden de Zusammensetzung erschmolzen:
Fe = 8 Gew.-%
V = 2 Gew.-%
Al = RestAn alloy of the following composition was melted:
Fe = 8% by weight
V = 2% by weight
Al = rest
Analog Beispiel I wurde die Schmelze auf verschiedene Art und Weise zu einem Pulver zerstäubt und nachher verdichtet. Aus dem Presskörper wurden Proben zur Bestimmung der Druckfestigkeit und der relativen Dichte herausgearbeitet. Die Resultate stellen sich wie folgt:
Es wurde eine Legierung der nachfolgenden Zusammensetzung erschmolzen:
Fe = 8 Gew.-%
Mo = 2 Gew.-%
Al = RestAn alloy of the following composition was melted:
Fe = 8% by weight
Mo = 2% by weight
Al = rest
Es gelang nicht, aus dem mit inertem Gas erzeugten Pulver einen Presskörper durch Kaltpressen herzustellen.
Die grünen Presskörper der vorstehenden Ausführungsbeispiele wurden ausserdem einem Entgasungsprozess unterworfen. Dabei zeigte sich, dass die Entgasungszeiten der mit inertem Zerstäubungsgas mit Sauerstoffzusatz erzeugten Pulver zwischen denjenigen mit inertem Zerstäubungsgas und denjenigen mit Luft lagen. Vorteilhafterweise sollen die grünen Presskörper vor der endgültigen thermomechanischen Behandlung (Heisspressen, Strangpressen), bei welcher sie ihre volle, 100%ige Dichte erreichen, während 1 bis 10 h bei einer Temperatur von 350 bis 400°C entgast werden.The green pressed bodies of the above exemplary embodiments were also subjected to a degassing process. It was found that the degassing times of the powders produced with inert atomizing gas with the addition of oxygen were between those with inert atomizing gas and those with air. Before the final thermomechanical treatment (hot pressing, extrusion), in which they reach their full, 100% density, the green pressed bodies should advantageously be degassed at a temperature of 350 to 400 ° C. for 1 to 10 hours.
Die Erfindung ist nicht auf die Ausführungsbeispiele beschränkt. Sie lässt sich grundsätzlich auf alle warmfesten Aluminiumlegierungen des Typs Al/Fe/X oder Al/Cr/X anwenden, wobei X = Ce, Ti, Zr, Hf, V, Nb, Cr, Mo, W bedeutet.The invention is not restricted to the exemplary embodiments. It can basically be applied to all heat-resistant aluminum alloys of the type Al / Fe / X or Al / Cr / X, where X = Ce, Ti, Zr, Hf, V, Nb, Cr, Mo, W.
Das Zerstäubungsgas kann ein inertes Gas wie Stickstoff, Argon oder Helium sein, dem 0,5 bis 2 Vol.-% Sauerstoff beigemengt sind. Es kann sich auch um eine Mischung von mindestens zweier der vorgenannten Gase handeln.The atomizing gas can be an inert gas such as nitrogen, argon or helium, to which 0.5 to 2% by volume of oxygen is added. It can also be a mixture of at least two of the aforementioned gases.
Das Verfahren wird vorzugsweise so geführt, dass im ersten Schritt (Zerstäubung im Gasstrom) ein Pulver erzeugt wird, welches verhältnismässig geringe Anteile gröberer, nicht-sphärischer Partikel und verhältnismässig hohe Anteile feiner sphärischer Partikel enthält. Dies kann durch geeignete Wahl der Gaszusammensetzung insbesondere des Sauerstoffzusatzes erzielt werden.The method is preferably carried out in such a way that in the first step (atomization in the gas stream) a powder is produced which contains relatively small proportions of coarser, non-spherical particles and comparatively high proportions of fine spherical particles. This can be achieved by a suitable choice of the gas composition, in particular the addition of oxygen.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3230/86A CH673240A5 (en) | 1986-08-12 | 1986-08-12 | |
| CH3230/86 | 1986-08-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0256450A1 true EP0256450A1 (en) | 1988-02-24 |
| EP0256450B1 EP0256450B1 (en) | 1991-01-30 |
Family
ID=4251456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87111463A Expired - Lifetime EP0256450B1 (en) | 1986-08-12 | 1987-08-07 | Process for manufacturing powder compacts with a high resistance and relatively low density from a heat-resisting aluminium alloy |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US4758405A (en) |
| EP (1) | EP0256450B1 (en) |
| JP (1) | JPS6347304A (en) |
| CH (1) | CH673240A5 (en) |
| DE (1) | DE3767807D1 (en) |
| DK (1) | DK415687A (en) |
| NO (1) | NO873364L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451093A1 (en) * | 1990-04-04 | 1991-10-09 | Alusuisse-Lonza Services Ag | High melting point metal composite |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH673240A5 (en) * | 1986-08-12 | 1990-02-28 | Bbc Brown Boveri & Cie | |
| US5114470A (en) * | 1990-10-04 | 1992-05-19 | The United States Of America As Represented By The Secretary Of Commerce | Producing void-free metal alloy powders by melting as well as atomization under nitrogen ambient |
| JPH0625782A (en) * | 1991-04-12 | 1994-02-01 | Hitachi Ltd | High ductility aluminum sintered alloy and its manufacture as well as its application |
| JP2790935B2 (en) * | 1991-09-27 | 1998-08-27 | ワイケイケイ株式会社 | Aluminum-based alloy integrated solidified material and method for producing the same |
| US5368657A (en) * | 1993-04-13 | 1994-11-29 | Iowa State University Research Foundation, Inc. | Gas atomization synthesis of refractory or intermetallic compounds and supersaturated solid solutions |
| US6010583A (en) * | 1997-09-09 | 2000-01-04 | Sony Corporation | Method of making unreacted metal/aluminum sputter target |
| US8603213B1 (en) | 2006-05-08 | 2013-12-10 | Iowa State University Research Foundation, Inc. | Dispersoid reinforced alloy powder and method of making |
| US7699905B1 (en) | 2006-05-08 | 2010-04-20 | Iowa State University Research Foundation, Inc. | Dispersoid reinforced alloy powder and method of making |
| US20090263273A1 (en) * | 2008-04-18 | 2009-10-22 | United Technologies Corporation | High strength L12 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 |
| US8778098B2 (en) * | 2008-12-09 | 2014-07-15 | United Technologies Corporation | Method for producing high strength aluminum alloy powder containing L12 intermetallic dispersoids |
| EP2383358A4 (en) * | 2009-01-28 | 2018-08-15 | Korea Automotive Technology Institute | Heat resistant aluminum alloy, and method for manufacturing same |
| US20100226817A1 (en) * | 2009-03-05 | 2010-09-09 | United Technologies Corporation | High strength l12 aluminum alloys produced by cryomilling |
| US20100254850A1 (en) * | 2009-04-07 | 2010-10-07 | United Technologies Corporation | Ceracon forging of l12 aluminum alloys |
| US20100252148A1 (en) * | 2009-04-07 | 2010-10-07 | United Technologies Corporation | Heat treatable l12 aluminum alloys |
| US9611522B2 (en) * | 2009-05-06 | 2017-04-04 | United Technologies Corporation | Spray deposition of L12 aluminum alloys |
| US9127334B2 (en) * | 2009-05-07 | 2015-09-08 | United Technologies Corporation | Direct forging and rolling of L12 aluminum alloys for armor applications |
| US20110044844A1 (en) * | 2009-08-19 | 2011-02-24 | United Technologies Corporation | Hot compaction and extrusion of l12 aluminum alloys |
| US8728389B2 (en) * | 2009-09-01 | 2014-05-20 | United Technologies Corporation | Fabrication of L12 aluminum alloy tanks and other vessels by roll forming, spin forming, and friction stir welding |
| US8409496B2 (en) * | 2009-09-14 | 2013-04-02 | United Technologies Corporation | Superplastic forming high strength L12 aluminum alloys |
| US20110064599A1 (en) * | 2009-09-15 | 2011-03-17 | United Technologies Corporation | Direct extrusion of shapes with l12 aluminum alloys |
| US9194027B2 (en) * | 2009-10-14 | 2015-11-24 | United Technologies Corporation | Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling |
| US8409497B2 (en) * | 2009-10-16 | 2013-04-02 | United Technologies Corporation | Hot and cold rolling high strength L12 aluminum alloys |
| US20110091345A1 (en) * | 2009-10-16 | 2011-04-21 | United Technologies Corporation | Method for fabrication of tubes using rolling and extrusion |
| US20110091346A1 (en) * | 2009-10-16 | 2011-04-21 | United Technologies Corporation | Forging deformation of L12 aluminum alloys |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1758844A1 (en) * | 1968-08-19 | 1971-03-04 | Gerliwanow Wadim G | Process for the production of finely divided metal and alloy powders |
| US3954458A (en) * | 1973-11-12 | 1976-05-04 | Kaiser Aluminum & Chemical Corporation | Degassing powder metallurgical products |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2967351A (en) * | 1956-12-14 | 1961-01-10 | Kaiser Aluminium Chem Corp | Method of making an aluminum base alloy article |
| US3462248A (en) * | 1956-12-14 | 1969-08-19 | Kaiser Aluminium Chem Corp | Metallurgy |
| US2963780A (en) * | 1957-05-08 | 1960-12-13 | Aluminum Co Of America | Aluminum alloy powder product |
| US4347076A (en) * | 1980-10-03 | 1982-08-31 | Marko Materials, Inc. | Aluminum-transition metal alloys made using rapidly solidified powers and method |
| US4647321A (en) * | 1980-11-24 | 1987-03-03 | United Technologies Corporation | Dispersion strengthened aluminum alloys |
| US4464199A (en) * | 1981-11-20 | 1984-08-07 | Aluminum Company Of America | Aluminum powder alloy product for high temperature application |
| US4435213A (en) * | 1982-09-13 | 1984-03-06 | Aluminum Company Of America | Method for producing aluminum powder alloy products having improved strength properties |
| DE3481322D1 (en) * | 1983-12-02 | 1990-03-15 | Sumitomo Electric Industries | ALUMINUM ALLOYS AND METHOD FOR THEIR PRODUCTION. |
| US4661172A (en) * | 1984-02-29 | 1987-04-28 | Allied Corporation | Low density aluminum alloys and method |
| JPS6148551A (en) * | 1984-08-13 | 1986-03-10 | Sumitomo Light Metal Ind Ltd | Formed material having superior strength at high temperature made of aluminium alloy material solidified by rapid cooling |
| CH673240A5 (en) * | 1986-08-12 | 1990-02-28 | Bbc Brown Boveri & Cie | |
| CH673242A5 (en) * | 1986-08-12 | 1990-02-28 | Bbc Brown Boveri & Cie |
-
1986
- 1986-08-12 CH CH3230/86A patent/CH673240A5/de not_active IP Right Cessation
-
1987
- 1987-08-07 DE DE8787111463T patent/DE3767807D1/en not_active Expired - Fee Related
- 1987-08-07 EP EP87111463A patent/EP0256450B1/en not_active Expired - Lifetime
- 1987-08-10 DK DK415687A patent/DK415687A/en not_active Application Discontinuation
- 1987-08-11 NO NO873364A patent/NO873364L/en unknown
- 1987-08-12 US US07/084,184 patent/US4758405A/en not_active Expired - Fee Related
- 1987-08-12 JP JP62201685A patent/JPS6347304A/en active Pending
-
1988
- 1988-05-06 US US07/191,242 patent/US4832741A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1758844A1 (en) * | 1968-08-19 | 1971-03-04 | Gerliwanow Wadim G | Process for the production of finely divided metal and alloy powders |
| US3954458A (en) * | 1973-11-12 | 1976-05-04 | Kaiser Aluminum & Chemical Corporation | Degassing powder metallurgical products |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451093A1 (en) * | 1990-04-04 | 1991-10-09 | Alusuisse-Lonza Services Ag | High melting point metal composite |
Also Published As
| Publication number | Publication date |
|---|---|
| CH673240A5 (en) | 1990-02-28 |
| DK415687D0 (en) | 1987-08-10 |
| DK415687A (en) | 1988-02-13 |
| EP0256450B1 (en) | 1991-01-30 |
| NO873364D0 (en) | 1987-08-11 |
| JPS6347304A (en) | 1988-02-29 |
| US4832741A (en) | 1989-05-23 |
| NO873364L (en) | 1988-02-15 |
| DE3767807D1 (en) | 1991-03-07 |
| US4758405A (en) | 1988-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0256450B1 (en) | Process for manufacturing powder compacts with a high resistance and relatively low density from a heat-resisting aluminium alloy | |
| DE69920621T2 (en) | PROCESS FOR PRODUCING SINZER PARTS | |
| DE69915797T2 (en) | METHOD FOR PRODUCING SEALED PARTS THROUGH UNIAXIAL PRESSING AGGLOMERED BALL-MOLDED METAL POWDER. | |
| WO2005080618A1 (en) | Method for the production of a molybdenum alloy | |
| DE2362499C2 (en) | Process for the powder-metallurgical production of extruded bodies | |
| EP0183017B2 (en) | Sintering process for prealloyed tungsten powder | |
| CH625442A5 (en) | ||
| DE2625213A1 (en) | Process for the production of sintered molded bodies | |
| DE2360914C2 (en) | Binding, deoxidizing and carburizing agents for the manufacture of preforms from metal powders | |
| DE2258485A1 (en) | METHOD AND DEVICE FOR MANUFACTURING CASTING AND PRESSING FORMS | |
| CH646999A5 (en) | OBJECT OF A HIGH-STRENGTH ALUMINUM ALLOY AND METHOD FOR THE PRODUCTION THEREOF. | |
| EP0045985B1 (en) | Method of manufacturing a copper-based memory alloy | |
| DE3717048C1 (en) | Process for the preparation of alloy powders for dental amalgams | |
| EP0545145B1 (en) | Manufacture of a porous copper-based material as a preform for a machining process | |
| DE2049546B2 (en) | Process for the powder-metallurgical production of a dispersion-strengthened alloy body | |
| DE2814553B2 (en) | Completely dense products made from nickel superalloys manufactured by powder metallurgy | |
| DE102009020004A1 (en) | Powder metallurgical process for the production of metal foam | |
| EP0256449B1 (en) | Powder-metallurgical manufacture of work pieces from a heat-resisting aluminium alloy | |
| EP0207268B1 (en) | Aluminium alloy suitable for the rapid cooling of a melt supersaturated with alloying elements | |
| DE3313736A1 (en) | HIGH-STRENGTH MOLDED BODY FROM A MECHANICALLY MACHINABLE POWDER METAL ALLOY ON IRON-BASED, AND METHOD FOR THE PRODUCTION THEREOF | |
| DE2102980A1 (en) | Dispersion-hardened metals and metal alloys and processes for their manufacture | |
| DE3308409C2 (en) | ||
| DE69308402T2 (en) | High-strength aluminum-based alloy and compressed and solidified material made from it | |
| DE2921592A1 (en) | METHOD AND DEVICE FOR MANUFACTURING COMPRESSES FROM INERT GAS-ATOMIZED POWDER FROM STAINLESS STEEL OR HEAT-RESISTANT STEEL | |
| EP0868956B1 (en) | Process for preparing metal articles with internal porosity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB LI SE |
|
| 17P | Request for examination filed |
Effective date: 19880715 |
|
| 17Q | First examination report despatched |
Effective date: 19900314 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB LI SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19910130 |
|
| REF | Corresponds to: |
Ref document number: 3767807 Country of ref document: DE Date of ref document: 19910307 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| EN | Fr: translation not filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19910716 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19910719 Year of fee payment: 5 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19910831 Ref country code: CH Effective date: 19910831 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19920501 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19920807 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19920808 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19920807 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 87111463.3 Effective date: 19930307 |