EP0878556B1 - Verfahren zur Herstellung von Rhenium enthaltenden Legierungen - Google Patents
Verfahren zur Herstellung von Rhenium enthaltenden Legierungen Download PDFInfo
- Publication number
- EP0878556B1 EP0878556B1 EP98108055A EP98108055A EP0878556B1 EP 0878556 B1 EP0878556 B1 EP 0878556B1 EP 98108055 A EP98108055 A EP 98108055A EP 98108055 A EP98108055 A EP 98108055A EP 0878556 B1 EP0878556 B1 EP 0878556B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rhenium
- weight
- nickel
- alloy
- cobalt
- 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.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- B22F2009/0804—Dispersion in or on liquid, other than with sieves
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- the invention relates to a method for producing rhenium-containing alloys with melting of the constituents forming the alloys, casting and solidification and the rhenium-containing alloys produced by the process.
- the invention particularly relates to a process for the preparation of rhenium-containing Alloys based on iron, cobalt, nickel or a mixture of at least two of these metals and those containing rhenium produced by the process Alloys based on iron, cobalt, nickel or a mixture of at least two of these metals.
- US 4,119,458 discloses a method of making a particular nickel or cobalt based Super alloy with 2-9% by weight rhenium and less than about 0.8% by weight Titanium and optionally an element from the group chrome, aluminum, tantalum, carbon, Nickel, cobalt, tungsten, vanadium, molybdenum, niobium, hafnium, zirconium and boron, with the following steps:
- rhenium-containing alloys based on iron, cobalt, nickel or one Mixtures of at least two of these metals are understood as alloys in the sense of the invention, the amount of iron, cobalt and / or nickel greater than that of rhenium and each which may also still be present in the alloys.
- This type of alloy includes the so-called super alloys.
- The are according to Römpp Chemie Lexikon, 9th edition, Stuttgart; New York: Georg Thieme Verlag 1989 until 1992, 4393, extremely complex alloys for one application at very high temperatures.
- the alloy is based on iron, nickel or cobalt with additions of Metals (cobalt, nickel, iron, chrome, molybdenum, tungsten, tantalum, niobium, aluminum, titanium, Manganese, zirconium) and non-metals (carbon and boron).
- Superalloy components are produced by forming, casting or sintering and acquire their special properties depending on the excretion or reaction kinetics of the elements involved of manufacturing process and application temperature.
- Super alloys are used in Engine and engine construction, used in energy technology and in aerospace.
- DE 25 30 245 C2 describes a high-temperature, Corrosion and oxidation resistant superalloy proposed that at least Contains 50% by volume ⁇ '-phase and from 14.3% by weight chromium, 13.5% by weight cobalt, 2.1% by weight titanium, 1.8% by weight aluminum, 9.2% by weight platinum, the rest nickel can.
- Super alloys for turbine engines may contain rhenium (Römpp Chemie Lexikon, 9th edition, Stuttgart; New York: Georg Thieme Verlag 1989 - 1992, 3867).
- Super alloys of this type consist for example of 10% cobalt, 8.7% tantalum, 5.9% tungsten, 5.7% aluminum, 5% chromium, 3% rhenium, 1.9% molybdenum, 0.1% hafnium, Balance nickel (EP 0 554 198 A1) or from 2% chromium, 3.7% cobalt, 32% molybdenum, 8.2% Tantalum, 6.2% aluminum, 6.3% rhenium, 4% vanadium, 0.24% carbon, balance nickel (Ullmann's encyclopedia of industrial chemistry, 5th edition, Weinheim: VCH publishing company mbH 1985 to 1995, volume A13, 61).
- rhenium and alloys containing iron, cobalt and / or nickel by melting together the constituent parts and then pouring them and solidification are usually first performed in a vacuum induction melting furnace Melting (premelting) generated from the main components and then the additives Melt added, the rhenium being in the form of rhenium powder by pressing and Sintering (vacuum or reducing atmosphere, mostly hydrogen) produced tablets used becomes.
- Melting premelting
- Sintering vacuum or reducing atmosphere, mostly hydrogen
- rhenium heptoxide Since rhenium is easily oxidized to rhenium heptoxide, Re 2 O 7 , by atmospheric oxygen, rhenium heptoxide can still be formed in the melt, for example, despite thorough degassing or in the furnace atmosphere, which sublimes from 250 ° C, so that the melt undesirably depleted in rhenium and the alloys no longer meet the specifications.
- the invention is therefore based on the object of a method for producing rhenium containing alloys based on iron, cobalt, nickel or a mixture of at least two of these metals by melting together the constituents forming the alloys, Pouring and solidification to find the disadvantages of the known method avoids.
- the process should be easier to perform and good and to alloys consistent quality and constant composition. According to the procedure superalloys containing rhenium in particular, especially those based on nickel, have it made.
- the method representing the solution to the problem is characterized in that that when the rhenium component melts together in the form of a melt metallurgy Rhenium alloy obtained with a rhenium content of 30 - 70% by weight and 30-70% by weight of iron, cobalt and / or nickel is used.
- the rhenium alloy used for the method according to the invention is a so-called Master alloys are "master alloys" according to Römpp Chemie Lexikon, 9th edition, Stuttgart; New York: Georg Thieme Verlag 1989 - 1992, 2478, such alloys used in metallurgy Find use.
- a rhenium-iron alloy of 30-70% by weight is particularly suitable for the process.
- Rhenium and 30-70% by weight iron preferably 50% by weight rhenium and 50 %
- iron, or a rhenium-cobalt alloy of 30-70% by weight rhenium and 30-70% by weight cobalt preferably made from 50% by weight rhenium and 50% by weight Cobalt.
- the method according to the invention has proven to be particularly favorable if one Rhenium-nickel alloy obtained from 30 - 70% by weight rhenium by melt metallurgy and 30-70% by weight of nickel, preferably of 50% by weight of rhenium and 50% by weight Nickel, is used.
- melt-metallurgical extraction of the rhenium master alloy is done to avoid this oxidation in a vacuum or under protective gas.
- Suitable materials for the crucibles are graphite, aluminum oxide, silicon dioxide and zirconium dioxide.
- the rhenium-iron, rhenium-cobalt and rhenium-nickel master alloy is advantageously used in the form of granules, which are obtained by pouring the melted master alloy into water Can be generated and are easy to handle and dose, used, As particularly suitable granules of around 1 to 3 millimeters have been found.
- the method according to the invention is distinguished - compared to the known method - due to its easier feasibility.
- the rhenium produced by the process Alloys containing are of very good quality and high purity.
- the process is preferred for the production of rhenium-based alloys used by nickel.
- the rhenium alloy used as the master alloy in the process according to the invention melts in a temperature interval (solidus temperature in the range from approximately 1550 ° C. to 1750 ° C.) which is below the melting point of the rhenium. So it melts in the premelt, which has a temperature of about 1500 to 1600 ° C and a density of about 8 g / cm 3 , much more easily than the sintered rhenium used in the known method.
- a temperature interval solidus temperature in the range from approximately 1550 ° C. to 1750 ° C.
- the lower density of the rhenium master alloy favors its homogeneous distribution in the Melt; there is no fear of settling on the bottom of the crucible. Also owns the rhenium master alloy to oxygen does not make the sintered one more reactive Rhenium tablets, so that there is no risk of the formation of rhenium heptoxide and as a result of which there is a depletion of rhenium in the melt.
- the rhenium-nickel alloy with a solidus temperature of 1620 ° C. which is preferably used as the master alloy for the process, can be melted by melting nickel and rhenium, which is obtained in a known manner from ammonium perrhenate by reduction in a stream of hydrogen, in vacuo or under Produce argon, carbon monoxide or hydrogen as protective gas.
- Graphite, aluminum oxide, silicon dioxide and zirconium dioxide are suitable materials for the crucible.
- aluminum oxide or silicon dioxide have proven particularly useful as crucible material and argon or carbon monoxide as protective gas.
- Rhenium can be obtained in a purity of more than 99.99% from ammonium perrhenate become. Nickel is generally of commercial quality with a purity of 99.97% used. If super-alloys are to be produced on the basis of nickel for the aerospace industry, Production of the rhenium-nickel master alloy nickel of high purity, as for example by the carbonyl process, that is, by thermal decomposition of nickel tetracarbonyl can be chosen.
- a rhenium alloy can also be used for the process according to the invention can be used as a master alloy, in addition to rhenium and iron, cobalt or nickel still contains a proportion of elements provided in the alloys to be produced.
- 500 g of rhenium powder and 500 nickel powder are placed in a silicon dioxide crucible and heated in an induction melting furnace (4000 Hz) under carbon monoxide. If that Nickel begins to melt (1455 ° C), the temperature is steadily increased until the whole Crucible content has melted. For the purpose of homogenization, the melt becomes two more Maintained at this temperature for minutes and then slowly into a large bath of cold water poured, forming granules with a grain size of about 1.5 mm. The through Melt extraction certain oxygen content of the granules is 370 ppm.
- rhenium powder and 600 g of nickel powder are placed in an aluminum oxide crucible and in an induction melting furnace (4000 Hz) under argon / hydrogen (95% by volume Argon and 5% by volume of hydrogen) melted according to Example 1 and granules shed.
- the granules have an oxygen content of 230 ppm.
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- 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)
Description
Claims (12)
- Verfahren zur Herstellung von Rhenium enthaltenden Legierungen unter Zusammenschmelzen der die Legierungen bildenden Bestandteile, Gießen und Erstarrenlassen, dadurch gekennzeichnet, dass beim Zusammenschmelzen der Bestandteil Rhenium in Form einer schmelzmetallurgisch gewonnenen Rhenium-Legierung aus 30 - 70 Gewichts-% Rhenium mit Rest Eisen, Kobalt und/oder Nickel eingesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Rhenium-Eisen-Legierung aus 30 - 70 Gewichts-% Rhenium und 30 - 70 Gewichts-% Eisen eingesetzt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass eine Rhenium-Eisen-Legierung aus 50 Gewichts-% Rhenium und 50 Gewichts-% Eisen eingesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Rhenium-Kobalt-Legierung aus 30 - 70 Gewichts-% Rhenium und 30 70 Gewichts-% Kobalt eingesetzt wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass eine Rhenium-Kobalt-Legierung aus 50 Gewichts-% Rhenium und 50 Gewichts-% Kobalt eingesetzt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Rhenium-Nickel-Legierung aus 30 - 70 Gewichts-% Rhenium und 30 - 70 Gewichts-% Nickel eingesetzt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass eine Rhenium-Nickel-Legierung aus 50 Gewichts-% Rhenium und 50 Gewichts-% Nickel eingesetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Rhenium-Legierung in Form von Granalien eingesetzt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Rhenium-Legierung in Form von 1 - 3 Millimeter großen Granalien eingesetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 9. dadurch gekennzeichnet, dass eine durch Erschmelzen im Vakuum erzeugte Rhenium-Legierung eingesetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass eine durch Erschmelzen unter Schutzgas erzeugte Rhenium-Legierung eingesetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass eine in einem Tiegel aus Graphit, Aluminiumoxid, Siliciumdioxid oder Zirkoniumdioxid erschmolzene Rhenium-Legierung eingesetzt wird.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19719407 | 1997-05-12 | ||
DE19719407 | 1997-05-12 | ||
DE19811765 | 1998-03-18 | ||
DE19811765A DE19811765A1 (de) | 1997-05-12 | 1998-03-18 | Verfahren zur Herstellung von Rhenium enthaltenden Legierungen und danach hergestellte Legierungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0878556A1 EP0878556A1 (de) | 1998-11-18 |
EP0878556B1 true EP0878556B1 (de) | 2003-12-17 |
Family
ID=26036412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98108055A Expired - Lifetime EP0878556B1 (de) | 1997-05-12 | 1998-05-04 | Verfahren zur Herstellung von Rhenium enthaltenden Legierungen |
Country Status (2)
Country | Link |
---|---|
US (1) | US6039920A (de) |
EP (1) | EP0878556B1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6821313B2 (en) * | 2002-05-31 | 2004-11-23 | Honeywell International, Inc. | Reduced temperature and pressure powder metallurgy process for consolidating rhenium alloys |
US6773663B2 (en) | 2002-05-03 | 2004-08-10 | Honeywell International, Inc. | Oxidation and wear resistant rhenium metal matrix composites |
US6946096B2 (en) | 2002-05-03 | 2005-09-20 | Honeywell International, Inc. | Use of powder metal sintering/diffusion bonding to enable applying silicon carbide or rhenium alloys to face seal rotors |
US6987339B2 (en) * | 2002-05-03 | 2006-01-17 | Honeywell International, Inc. | Flywheel secondary bearing with rhenium or rhenium alloy coating |
US7270782B2 (en) * | 2002-09-13 | 2007-09-18 | Honeywell International, Inc. | Reduced temperature and pressure powder metallurgy process for consolidating rhenium alloys |
US7540995B2 (en) * | 2005-03-03 | 2009-06-02 | Icon Medical Corp. | Process for forming an improved metal alloy stent |
US9107899B2 (en) | 2005-03-03 | 2015-08-18 | Icon Medical Corporation | Metal alloys for medical devices |
JP5335244B2 (ja) * | 2005-03-03 | 2013-11-06 | アイコン メディカル コーポレーション | 改良された金属合金を用いた医療用部材 |
US7452501B2 (en) * | 2005-03-03 | 2008-11-18 | Icon Medical Corp. | Metal alloy for a stent |
WO2008008291A2 (en) * | 2006-07-13 | 2008-01-17 | Icon Medical Corp. | Stent |
US20090028744A1 (en) * | 2007-07-23 | 2009-01-29 | Heraeus, Inc. | Ultra-high purity NiPt alloys and sputtering targets comprising same |
DE102008026910A1 (de) * | 2008-06-05 | 2009-12-10 | H.C. Starck Gmbh | Verfahren zur Herstellung von reinem Ammoniumperrphenat |
DE102009037622B4 (de) * | 2009-08-14 | 2013-08-01 | Technische Universität Carolo-Wilhelmina Zu Braunschweig | Legierung für mechanisch höchst belastete Bauteile |
US8398916B2 (en) | 2010-03-04 | 2013-03-19 | Icon Medical Corp. | Method for forming a tubular medical device |
EP2725110B1 (de) * | 2012-10-26 | 2017-05-03 | MTU Aero Engines GmbH | Kriechbeständige, rheniumfreie Nickelbasissuperlegierung |
BR112016030273A2 (pt) | 2014-06-24 | 2017-08-22 | Icon Medical Corp | Dispositivo médico e método para formar o referido dispositivo |
US11766506B2 (en) | 2016-03-04 | 2023-09-26 | Mirus Llc | Stent device for spinal fusion |
DE102016010977A1 (de) * | 2016-09-13 | 2018-03-15 | H.C. Starck Surface Technology and Ceramic Powders GmbH | Verfahren zur Herstellung von Ammoniumperrhenat |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE729862C (de) * | 1939-06-20 | 1943-10-12 | Degussa | Werkstoff zur Herstellung von korrosionsfesten, naturharten und abriebfesten Gegenstaenden |
CH503114A (de) * | 1966-12-21 | 1971-02-15 | Egyesuelt Izzolampa | Auf pulvermetallurgischem Wege hergestellter Metallkörper erhöhter Plastizität |
GB1520630A (en) * | 1974-07-08 | 1978-08-09 | Johnson Matthey Co Ltd | Platinum group metal-containing alloys |
JPS5942066B2 (ja) * | 1975-10-24 | 1984-10-12 | 日本電気株式会社 | レニウム−コバルト合金接点 |
US4119458A (en) * | 1977-11-14 | 1978-10-10 | General Electric Company | Method of forming a superalloy |
US5335717A (en) * | 1992-01-30 | 1994-08-09 | Howmet Corporation | Oxidation resistant superalloy castings |
-
1998
- 1998-05-04 US US09/072,381 patent/US6039920A/en not_active Expired - Fee Related
- 1998-05-04 EP EP98108055A patent/EP0878556B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0878556A1 (de) | 1998-11-18 |
US6039920A (en) | 2000-03-21 |
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