EP2451986A1 - Nickel-basis-superlegierung - Google Patents
Nickel-basis-superlegierungInfo
- Publication number
- EP2451986A1 EP2451986A1 EP10726136A EP10726136A EP2451986A1 EP 2451986 A1 EP2451986 A1 EP 2451986A1 EP 10726136 A EP10726136 A EP 10726136A EP 10726136 A EP10726136 A EP 10726136A EP 2451986 A1 EP2451986 A1 EP 2451986A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nickel
- alloy
- alloys
- ppm
- weight
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
Definitions
- the invention relates to the field of materials technology. It relates to a nickel-base superalloy, in particular for the production of single-crystal components (SX alloy) or components with directionally solidified structure (DS alloy), such as blades for gas turbines.
- SX alloy single-crystal components
- DS alloy directionally solidified structure
- the alloy according to the invention can also be used for conventionally cast components.
- Nickel-base superalloys are known. Single crystal components of these alloys have a very good material strength at high temperatures. As a result, z. B. the inlet temperature of gas turbines are increased, whereby the efficiency of the gas turbine increases.
- Nickel-based superalloys for single-crystal components as known from US Pat. Nos. 4,643,782, EP 0 208 645 and US Pat. No. 5,270,123, contain alloying-strengthening alloying elements, for example Re, W, Mo, Co, Cr and y-phase-forming elements, for example Al, Ta, and Ti.
- W, Mo, Re high-melting alloy elements
- the alloys disclosed in the above references have high creep strength, good LCF (low cycle fatigue fatigue) and HCF (high cycle life fatigue) properties, and high oxidation resistance.
- the alloy CMSX-4 of US Pat. No. 4,643,782 when used experimentally in a gas turbine at a temperature above 1000 ° C., strongly coarsens the ⁇ 1 phase, which is disadvantageously accompanied by an increase in the creeping speed of the alloy.
- a nickel-based superalloy which has an improved castability and a higher oxidation resistance in comparison to known nickel-based superalloys and which also z. B. is particularly suitable for large gas turbine single crystal components with a length of> 80 mm.
- the nickel-base superalloy disclosed therein is characterized by the following chemical composition (in% by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9 -5.1 Al, 1.3-1.4 Ti, 0.1 1 -0.15 Si, 0.11 -0.15 Hf, 200-750 ppm C, 50-400 ppm B, remainder nickel and manufacturing-related impurities.
- the aim of the invention is to develop an alloy which, compared to the alloys known from the prior art, is characterized by a further property optimization with regard to use as a gas turbine component.
- the invention is based on the object to develop a nickel-based superalloy, which has a high Oxidation resistance and at the same time has a high corrosion resistance (with different fuel properties) and is also advantageous to less costly compared to known such nickel-base superalloys.
- the nickel-based superalloy according to the invention is characterized by the following chemical composition (data in% by weight):
- the alloy has a very high oxidation resistance and at the same time a high corrosion resistance at high temperatures. This is achieved in a surprising manner, especially by the relatively low Re addition.
- the alloy 1.0-1.5. preferably has 1.5% by weight of Re. If the C content is only about 200-300 ppm and the boron content is 50-100 ppm, preferably 90 ppm, then these novel alloys are particularly suitable for the production of Single crystal components suitable.
- the alloy according to the invention may optionally have up to 0.5, preferably 0.1-0.2,% by weight of Nb.
- a particularly preferred nickel-base superalloy has the following composition (in% by weight):
- This alloy has excellent properties at high temperatures and is also not too expensive due to the relatively low Re content.
- a further advantageous alloy composition is mentioned below (in% by weight):
- This latter alloy is particularly suitable for the production of single crystal components.
- Fig. 2 shows the dependence of the specific mass change of the time at a temperature of 950 ° C for the same alloys as in Fig. 1 and
- Fig. 3 shows the dependence of creep strength of Larson-Miller
- Nickel-based superalloys having the chemical composition given in Table 1 were investigated (in% by weight):
- the alloy IN738LC is a comparative alloy known from the prior art
- KNXO is likewise a comparative alloy (according to EP 1 359 231 B1)
- the alloys KNX1 to KNX4 are alloys according to the invention.
- the suffix CC stands in each case as an abbreviation for "conventionally cast”, ie conventionally cast alloys with conventional polygonal structure and the addition DS as an abbreviation for "directionally solidified”, ie for directionally solidified microstructure.
- the alloys according to the invention and the comparative alloy differ, for example, in that the comparative alloy is not alloyed with C, Si, Hf and Re in contrast to the alloys according to the invention.
- the presence of C in and along the grain boundaries reduces the diffusion process, which is a major cause of grain boundary weakness.
- the castability of long single-crystal components for example, gas turbine blades with a length of about 200 to 230 mm, significantly improved.
- nickel-base superalloys with low C and B contents are chosen according to claim 1 of the invention, these are useful as single crystal alloys, with higher contents of these elements (maximum 200-300 ppm C and 50-100 ppm B), the components produced from corresponding alloys can also be cast conventionally.
- the moderate rhenium content of the inventive nickel-base superalloy of preferably 1.5% by weight advantageously increases on the one hand the creep resistance of the alloy, on the other hand not so extremely high costs are caused by this alloying element, such as in the known from the prior art nickel Second and third generation single crystal superalloys which have relatively high rhenium levels (about 3 to 6 wt% Re).
- FIG. 1 shows the results of tensile tests (yield strength, tensile strength, elongation) at room temperature for an alloy known from the prior art (DS IN738LC) and the inventive alloy KNX1.
- the respective chemical composition of the alloys is given in Tab.
- FIG. 2 shows a quasi-isothermal oxidation diagram.
- FIG. 1 shows a quasi-isothermal oxidation diagram.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Catalysts (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH01069/09A CH701415A1 (de) | 2009-07-09 | 2009-07-09 | Nickel-Basis-Superlegierung. |
| PCT/EP2010/059368 WO2011003804A1 (de) | 2009-07-09 | 2010-07-01 | Nickel-basis-superlegierung |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP2451986A1 true EP2451986A1 (de) | 2012-05-16 |
| EP2451986B1 EP2451986B1 (de) | 2013-08-21 |
| EP2451986B2 EP2451986B2 (de) | 2017-10-18 |
Family
ID=41198665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10726136.4A Not-in-force EP2451986B2 (de) | 2009-07-09 | 2010-07-01 | Nickel-basis-superlegierung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9017605B2 (de) |
| EP (1) | EP2451986B2 (de) |
| JP (1) | JP5595495B2 (de) |
| CH (1) | CH701415A1 (de) |
| RU (1) | RU2525952C2 (de) |
| WO (1) | WO2011003804A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH701415A1 (de) | 2009-07-09 | 2011-01-14 | Alstom Technology Ltd | Nickel-Basis-Superlegierung. |
| WO2013167513A1 (en) | 2012-05-07 | 2013-11-14 | Alstom Technology Ltd | Method for manufacturing of components made of single crystal (sx) or directionally solidified (ds) superalloys |
| JP6016016B2 (ja) * | 2012-08-09 | 2016-10-26 | 国立研究開発法人物質・材料研究機構 | Ni基単結晶超合金 |
| RU2685455C2 (ru) * | 2015-12-15 | 2019-04-18 | Открытое акционерное общество "Научно-производственное объединение "Сатурн" | Литейный никелевый сплав с равноосной структурой |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526499A (en) † | 1967-08-22 | 1970-09-01 | Trw Inc | Nickel base alloy having improved stress rupture properties |
| US4643782A (en) * | 1984-03-19 | 1987-02-17 | Cannon Muskegon Corporation | Single crystal alloy technology |
| US5270123A (en) * | 1992-03-05 | 1993-12-14 | General Electric Company | Nickel-base superalloy and article with high temperature strength and improved stability |
| RU2088685C1 (ru) * | 1995-03-14 | 1997-08-27 | Уфимский государственный авиационный технический университет | Жаропрочный сплав на никелевой основе |
| US6190471B1 (en) | 1999-05-26 | 2001-02-20 | General Electric Company | Fabrication of superalloy articles having hafnium- or zirconium-enriched protective layer |
| JP3679973B2 (ja) † | 2000-04-17 | 2005-08-03 | 三菱重工業株式会社 | 単結晶Ni基耐熱合金およびタービン翼およびガスタービン |
| EP1184473B1 (de) † | 2000-08-30 | 2005-01-05 | Kabushiki Kaisha Toshiba | Monokristalline Nickel-Basis-Legierungen und Verfahren zur Herstellung und daraus hergestellte Hochtemperaturbauteile einer Gasturbine |
| RU2186144C1 (ru) * | 2000-11-16 | 2002-07-27 | Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" | Никелевый жаропрочный сплав для монокристального литья и изделие, выполненное из этого сплава |
| DE50112339D1 (de) † | 2001-12-13 | 2007-05-24 | Siemens Ag | Hochtemperaturbeständiges Bauteil aus einkristalliner oder polykristalliner Nickel-Basis-Superlegierung |
| CH695497A5 (de) * | 2002-04-30 | 2006-06-15 | Alstom Technology Ltd | Nickel-Basis-Superlegierung. |
| US6905559B2 (en) * | 2002-12-06 | 2005-06-14 | General Electric Company | Nickel-base superalloy composition and its use in single-crystal articles |
| JP5252348B2 (ja) * | 2006-03-20 | 2013-07-31 | 独立行政法人物質・材料研究機構 | Ni基超合金とその製造方法およびタービンブレードまたはタービンベーン部品 |
| ES2444407T3 (es) * | 2006-09-07 | 2014-02-24 | Alstom Technology Ltd | Procedimiento para el tratamiento térmico de súper-aleaciones a base de níquel |
| CH701415A1 (de) | 2009-07-09 | 2011-01-14 | Alstom Technology Ltd | Nickel-Basis-Superlegierung. |
| CH702642A1 (de) * | 2010-02-05 | 2011-08-15 | Alstom Technology Ltd | Nickel-Basis-Superlegierung mit verbessertem Degradationsverhalten. |
-
2009
- 2009-07-09 CH CH01069/09A patent/CH701415A1/de not_active Application Discontinuation
-
2010
- 2010-07-01 RU RU2012104486/02A patent/RU2525952C2/ru not_active IP Right Cessation
- 2010-07-01 EP EP10726136.4A patent/EP2451986B2/de not_active Not-in-force
- 2010-07-01 JP JP2012518908A patent/JP5595495B2/ja not_active Expired - Fee Related
- 2010-07-01 WO PCT/EP2010/059368 patent/WO2011003804A1/de not_active Ceased
-
2011
- 2011-12-21 US US13/332,821 patent/US9017605B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011003804A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011003804A1 (de) | 2011-01-13 |
| RU2525952C2 (ru) | 2014-08-20 |
| JP5595495B2 (ja) | 2014-09-24 |
| CH701415A1 (de) | 2011-01-14 |
| RU2012104486A (ru) | 2013-08-20 |
| JP2012532982A (ja) | 2012-12-20 |
| EP2451986B2 (de) | 2017-10-18 |
| US9017605B2 (en) | 2015-04-28 |
| EP2451986B1 (de) | 2013-08-21 |
| US20120128527A1 (en) | 2012-05-24 |
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