EP2154261A1 - Alliage résistant aux températures élevées - Google Patents
Alliage résistant aux températures élevées Download PDFInfo
- Publication number
- EP2154261A1 EP2154261A1 EP09165678A EP09165678A EP2154261A1 EP 2154261 A1 EP2154261 A1 EP 2154261A1 EP 09165678 A EP09165678 A EP 09165678A EP 09165678 A EP09165678 A EP 09165678A EP 2154261 A1 EP2154261 A1 EP 2154261A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloys
- temperature alloy
- weight
- alloy
- high temperature
- 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
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Classifications
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- 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
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- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Definitions
- the invention relates to the field of materials technology. It relates to a high-temperature alloy based on iron, which contains about 20% by weight of Cr and several% by weight of Al and minor amounts of other constituents, and which has good mechanical properties and a very good oxidation resistance at use temperatures of up to 1200 ° C.
- ODS oxide-dispersion-strengthened, oxide dispersion strengthened
- iron z. B. ferritic ODS FeCrAI alloys
- They are due to their excellent mechanical properties at high temperatures preferred for thermally and mechanically highly stressed components, eg. B. for gas turbine blades used.
- thermocouple protection tubes which are used, for example, in sequential combustion gas turbines for temperature control where they are exposed to extremely high temperatures and oxidizing atmospheres.
- Table 1 sets forth the nominal chemical compositions (in weight%): Table 1: Nominal composition of known ODS-FeCrAlTi alloys component Alloy designation Fe Cr al Ti Si Addition of reactive elements (in the form of an oxide dispersion) Kanthal APM rest 20.0 5.5 12:03 12:23 ZrO 2 -Al 2 O 3 MA 956 rest 20.0 4.5 0.5 - Y 2 O 3 -Al 2 O 3 (0.5Y 2 O 3 ) PM 2000 rest 19.0 5.5 0.5 - Y 2 O 3 -Al 2 O 3 (0.5Y 2 O 3 )
- the materials mentioned have very high creep ruptures at very high temperatures and also excellent high-temperature oxidation resistance by forming an Al 2 O 3 protective film, as well as a high resistance to sulfidation and steam oxidation. They have strong directional characteristics. For example, in pipes, the creep strength in the transverse direction is only about 50% of the creep strength in the longitudinal direction.
- Ni-base wrought alloys such as Hastelloy X and Haynes 214, which can be made cheaper than the above-mentioned materials and have no anisotropic properties.
- These alloys have the following chemical compositions: Table 2: Nominal composition of known Ni-base wrought alloys component Alloy designation Ni Cr Co Not a word W Fe Mn Si C al Y Hastelloy X rest 22 1.5 9 0.6 18.5 0.5 0.5 0.1 0.3 - Haynes 214 rest 16 - - - 3 - - 12:04 4.5 12:01
- the Haynes 214 material is said to be the oxidation, carburization and chlorination resistant alloy commercially available as wrought alloy, with effective use at 2200 ° F (about 1205 ° C) for long term stress or 2400 ° F (approx 1316 ° C) is possible for short-term stress.
- 2200 ° F about 1205 ° C
- 2400 ° F approximately 1316 ° C
- the properties of this alloy at very high temperatures do not match the excellent properties of the abovementioned ODS alloys.
- the aim of the invention is to avoid the mentioned disadvantages of the prior art.
- the object of the invention is to develop an iron-based material which is suitable for the abovementioned applications (protective tubes for thermocouples which can be used in gas turbines at extremely high temperatures), which is less expensive than the material PM 2000 known from the prior art is, but has at least as good oxidation resistance.
- the material according to the invention should be readily heat-moldable and have very good mechanical properties.
- the high proportion of Cr (20% by weight) ensures that the material shows good oxidation and corrosion behavior. Cr also positively affects ductility.
- the alloy contains 5-6, preferably 5.5% by weight Al.
- an Al 2 O 3 protective film is formed on the material surface, which enhances the high-temperature oxidation resistance.
- the contents of Ta and Mo are less than the specified values of 4% by weight each, the high-temperature strength is excessively reduced, if they are higher, the oxidation resistance is undesirably reduced, and the material becomes too expensive.
- Ta, Zr and B are elements which act as precipitation strengthening agents.
- Rhenium A special meaning comes to the Rhenium.
- An addition of 3-4% by weight of Re results in improving the creep rupture strength of the material at very high temperatures, while at the same time increasing the oxidation resistance.
- Re is a solid solution hardener and has a very strong effect in improving creep properties at high temperatures. It increases the activity of Al to form Al 2 O 3 .
- Re has a hexagonal close-packed crystal structure, which is very different from the cubic lattice structure of Fe, Mo, Al, Ta, Cr. This difference in the crystal structure of Re causes it to function as a solid solution hardener.
- the material according to the invention Due to its chemical composition (combination of the specified elements in the stated ranges), the material according to the invention has outstanding properties at temperatures of 1200 ° C., in particular good creep rupture strength and extremely high oxidation resistance.
- the sole FIGURE shows the oxidation behavior at 1200 ° C./12 h for two high-temperature alloys according to the invention in comparison with the alloys PM 2000, Hastelloy X and Haynes 214 known from the prior art.
- novel alloys were prepared by arc melting of the specified elements and then rolled at temperatures of 900-800 ° C. From these samples were prepared to determine the oxidation resistance and the mechanical properties.
- the weight change at 1200 ° C as a function of time over a period of 12 hours is shown for the specified alloys.
- the comparative powder metallurgy PM 2000 known from the prior art but very expensive, has the lowest weight changes and thus the best oxidation resistance under these experimental conditions.
- the inventive alloy 2022 which differs from the other alloy 2025 according to the invention only in that on the one hand it contains no carbon and on the other hand the Re content is higher by 1% by weight.
- the other known wrought alloys known from the prior art (Hastelloy X and Haynes 214) behave much worse than the alloys according to the invention under the experimental conditions mentioned above with regard to the oxidation behavior.
- the change in weight of Hastelloy samples, for example, after 12 hours of aging at 1200 ° C adversely about 2-2.5 times as large as in the inventive alloys.
- the yield strength at 1000 ° C. is about 60 MPa for the alloys according to the invention, while the comparative alloy PM 2000 has a yield strength at 1000 ° C. of about 90 MPa. However, if this is combined with the excellent oxidation behavior of these alloys at 1200 ° C (see figure), then this is a very good combination of properties.
- the lower strength of the inventive alloys compared to PM 2000 is also completely sufficient for the intended use (protective tube for jacket thermocouple).
- novel materials can also be hot rolled well, they have a good plastic deformability.
- a combination of Mo and Ta in equal proportions has a particularly good effect on the oxidation behavior at 1200 ° C.
- Ta increases the activity of Al in the specified range and improves the oxidation resistance.
- thermocouples can advantageously be produced from the materials according to the invention.
- Such thermocouples are used for example in gas turbines with sequential combustion for temperature control and exposed there to oxidizing atmospheres.
- the alloys according to the invention have a very high oxidation resistance at 1200 ° C. Although the strength values of the alloys according to the invention are slightly lower than those of the alloy PM 2000 at high temperatures, they are still sufficiently high. Since the alloys according to the invention are also cheaper than PM 2000 (cheaper components, easier production), they are outstandingly suitable as a replacement for PM 2000 for the fields of application described above.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01174/08A CH699206A1 (de) | 2008-07-25 | 2008-07-25 | Hochtemperaturlegierung. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2154261A1 true EP2154261A1 (fr) | 2010-02-17 |
EP2154261B1 EP2154261B1 (fr) | 2011-11-02 |
Family
ID=39884286
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09165678A Not-in-force EP2154261B1 (fr) | 2008-07-25 | 2009-07-16 | Alliage résistant aux températures élevées |
Country Status (5)
Country | Link |
---|---|
US (1) | US8153054B2 (fr) |
EP (1) | EP2154261B1 (fr) |
JP (1) | JP5522998B2 (fr) |
AT (1) | ATE531831T1 (fr) |
CH (1) | CH699206A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5277345B2 (ja) | 2010-03-04 | 2013-08-28 | 本田技研工業株式会社 | 車両の旋回制御装置 |
EP3339482A1 (fr) * | 2016-12-26 | 2018-06-27 | Nuctech Company Limited | Film sensible pour la détection de neutrons et son procédé de formation |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0516267A1 (fr) * | 1991-05-29 | 1992-12-02 | Nisshin Steel Co., Ltd. | Acier inoxydable ferritique à teneur élevée en aluminium |
EP1076157A2 (fr) * | 1999-08-09 | 2001-02-14 | ALSTOM POWER (Schweiz) AG | Elément de friction pour une turbomachine |
DE19941228A1 (de) * | 1999-08-30 | 2001-03-08 | Asea Brown Boveri | Eisenaluminidbeschichtung |
WO2001049441A1 (fr) * | 2000-01-01 | 2001-07-12 | Sandvik Ab | PROCEDE DE PRODUCTION D'UN MATERIAU EN FeCrAl ET LEDIT MATERIAU |
WO2005080622A1 (fr) * | 2004-02-23 | 2005-09-01 | Sandvik Intellectual Property Ab | Acier cr-al pour applications haute temperature |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508974B1 (fr) * | 1970-12-14 | 1975-04-09 | ||
JPS55461B2 (fr) * | 1971-11-09 | 1980-01-08 | ||
BE794801A (fr) * | 1972-01-31 | 1973-07-31 | Int Nickel Ltd | Procede de recuit en zones d'alliages |
US4277374A (en) * | 1980-01-28 | 1981-07-07 | Allegheny Ludlum Steel Corporation | Ferritic stainless steel substrate for catalytic system |
US4334923A (en) * | 1980-02-20 | 1982-06-15 | Ford Motor Company | Oxidation resistant steel alloy |
DE3926479A1 (de) * | 1989-08-10 | 1991-02-14 | Siemens Ag | Rheniumhaltige schutzbeschichtung, mit grosser korrosions- und/oder oxidationsbestaendigkeit |
JP2682335B2 (ja) * | 1992-06-01 | 1997-11-26 | 住友金属工業株式会社 | フェライト系ステンレス鋼熱延鋼帯の製造法 |
JPH06108268A (ja) * | 1992-09-30 | 1994-04-19 | Sumitomo Metal Ind Ltd | フェライト系ステンレス鋼箔およびその製造法 |
EP0573343B1 (fr) * | 1992-06-01 | 1998-02-25 | Sumitomo Metal Industries, Ltd. | TÔles et feuilles en acier ferritique inoxydable et procédé pour leur fabrication |
US5939204A (en) * | 1995-08-16 | 1999-08-17 | Siemens Aktiengesellschaft | Article for transporting a hot, oxidizing gas |
EP0845050B1 (fr) * | 1995-08-16 | 1999-05-26 | Siemens Aktiengesellschaft | Element permettant le guidage d'un gaz chaud oxydant |
JP2000097779A (ja) * | 1998-09-18 | 2000-04-07 | Daido Steel Co Ltd | 熱電対保護管 |
US6346134B1 (en) * | 2000-03-27 | 2002-02-12 | Sulzer Metco (Us) Inc. | Superalloy HVOF powders with improved high temperature oxidation, corrosion and creep resistance |
-
2008
- 2008-07-25 CH CH01174/08A patent/CH699206A1/de not_active Application Discontinuation
-
2009
- 2009-07-16 EP EP09165678A patent/EP2154261B1/fr not_active Not-in-force
- 2009-07-16 AT AT09165678T patent/ATE531831T1/de active
- 2009-07-24 JP JP2009172598A patent/JP5522998B2/ja not_active Expired - Fee Related
- 2009-07-24 US US12/509,076 patent/US8153054B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0516267A1 (fr) * | 1991-05-29 | 1992-12-02 | Nisshin Steel Co., Ltd. | Acier inoxydable ferritique à teneur élevée en aluminium |
EP1076157A2 (fr) * | 1999-08-09 | 2001-02-14 | ALSTOM POWER (Schweiz) AG | Elément de friction pour une turbomachine |
DE19941228A1 (de) * | 1999-08-30 | 2001-03-08 | Asea Brown Boveri | Eisenaluminidbeschichtung |
WO2001049441A1 (fr) * | 2000-01-01 | 2001-07-12 | Sandvik Ab | PROCEDE DE PRODUCTION D'UN MATERIAU EN FeCrAl ET LEDIT MATERIAU |
WO2005080622A1 (fr) * | 2004-02-23 | 2005-09-01 | Sandvik Intellectual Property Ab | Acier cr-al pour applications haute temperature |
Also Published As
Publication number | Publication date |
---|---|
EP2154261B1 (fr) | 2011-11-02 |
CH699206A1 (de) | 2010-01-29 |
US20100021338A1 (en) | 2010-01-28 |
US8153054B2 (en) | 2012-04-10 |
JP2010047836A (ja) | 2010-03-04 |
JP5522998B2 (ja) | 2014-06-18 |
ATE531831T1 (de) | 2011-11-15 |
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