EP3133178A1 - Superalliage a base de nickel optimise - Google Patents
Superalliage a base de nickel optimise Download PDFInfo
- Publication number
- EP3133178A1 EP3133178A1 EP15181489.4A EP15181489A EP3133178A1 EP 3133178 A1 EP3133178 A1 EP 3133178A1 EP 15181489 A EP15181489 A EP 15181489A EP 3133178 A1 EP3133178 A1 EP 3133178A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nickel
- equal
- weight
- alloy
- based alloy
- 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 a nickel-based alloy, in particular a nickel-based superalloy for high-temperature applications, preferably for use in turbomachines, such as aircraft engines, and a corresponding component of a turbomachine, in particular an aircraft engine made of such a nickel-based alloy.
- nickel-base alloy is meant a material that has nickel in the main component.
- a special embodiment of nickel-base alloys are nickel-based superalloys, which are understood to mean alloys which, owing to their particular composition and microstructure formation, can be used at high temperatures up to their melting point.
- nickel-based alloy as used hereinafter, thus also encompasses the term nickel-base superalloy.
- Nickel base superalloys are used in high temperature applications, e.g. B. in the construction of stationary gas turbines or aircraft engines, used because of their high temperature strength.
- High-temperature application is understood to mean an application in which the operating temperature of a component produced from the alloy lies in a temperature range above half the melting temperature of the alloy.
- the nickel base superalloys owe their good high temperature properties, and in particular their excellent high temperature strength, to a special microstructure characterized by a y matrix and ⁇ 'precipitates embedded therein.
- the cubic face - centered y - phase of the matrix consists of the main constituent nickel as well as elements such as cobalt, chromium, molybdenum, rhenium and tungsten, which are added to nickel - base superalloys.
- Such alloying constituents as tungsten, rhenium, and molybdenum provide solid solution strengthening of the y-matrix, which adds strength to the alloy in addition to precipitation hardening with the y 'precipitates.
- the alloy constituents rhenium, tungsten and molybdenum additionally produce, in addition to solid solution hardening of the y matrix, stabilization of the y 'precipitates and counteract their coarsening, which would lead to a decrease in creep resistance.
- TCP topologically closed packed
- the y 'precipitation phases usually also have a cubic face centered structure with the composition Ni 3 (Al, Ti, Ta, Nb).
- the strength of nickel-based superalloys can be increased by the formation of carbides that stabilize the grain boundaries and thus contribute to creep resistance.
- nickel base superalloys in high temperature applications, such as the composition chosen for the refractory metals cobalt, chromium, molybdenum, rhenium and tungsten as mixed crystal formers and the proportions of aluminum, tantalum and titanium as constituents of the y 'precipitates becomes.
- the melting point of the alloy with high creep resistance and the lowest possible specific weight and good processability it depends on the optimal composition of the alloying elements.
- the density of the alloy should be kept as low as possible and a good and easy production and processability of the alloy can be ensured.
- the present invention proposes providing an optimized composition of a nickel-based alloy, in particular with regard to the alloying elements cobalt, rhenium, tungsten, tantalum, aluminum and titanium, since these alloying elements considerably increase the structure and microstructure formation and the corresponding mechanical properties of the alloy influence.
- a nickel-base superalloy having a chemical composition containing from 3.7 to 7.0% by weight of Al, from 10 to 20% by weight of Co from 2.1 to 7.2% by weight of Cr, by weight.
- P 0 to 0.001 wt% S, 0 to 0.003 wt% B, 0 to 0.05 wt% Cu, 0 to 0.15 wt% Fe, 0 to 0.15 wt% Hf, 0 to 0.015 wt.% Zr, 0 to 0.001 wt.% Y and the remainder comprises nickel and unavoidable impurities.
- the nickel content of the alloy is the main constituent of the alloy, ie the constituent which has the highest content in wt.% Or at.% Of the alloy. It goes without saying that the corresponding alloy is always present only to 100%, so that no addition of the limits of the specified ranges of shares can be made in such a way that the composition of the alloy would make up less or more than 100%, or nickel not the corresponding largest would make a contribution. Rather, with the use of an alloying element with a high proportion, a corresponding reduction of other alloying elements must be carried out with a proportion corresponding to that stated.
- the nickel-based alloy is characterized in particular by the fact that the proportion of tantalum is always greater than or equal to the proportion of aluminum, so that the ratio of the proportions of tantalum to aluminum in wt .-% is greater than or equal to 1, so c (Ta) / c (Al) ⁇ 1.
- the ratio of tantalum to aluminum in wt.% Should be less than or equal to 2. It has been shown that an improved distribution of tungsten and molybdenum between the y matrix and the y 'precipitates can be achieved so that the proportion of tungsten and / or molybdenum in the ⁇ matrix is greater than in the y'. - excretions.
- the ratio of the proportions of cobalt to tungsten in wt.% Is set to be greater than or equal to 2 and less than or equal to 5, since by increasing the cobalt content, an improvement in segregation performance, ie lower casting segregation and higher degree of homogenization achievable so that shorter or easier solution annealing cycles can be used.
- the strength can be increased or the total tungsten content can be reduced while solid solution hardening remains the same, which in particular also has an advantageous effect on the density of the alloy.
- the ratio of the proportions of cobalt to tungsten in% by weight can be less than or equal to 4.
- the nickel-base alloy can be adjusted so that the ratio of the proportions of tungsten to molybdenum in wt.% Is greater than or equal to 1 and less than or equal to 4. Also, the objectives of avoiding casting segregation, preventing the formation of TCP phases, and better distribution of tungsten and molybdenum between the ⁇ matrix and the y 'precipitates can be achieved.
- the ratio of the proportions of cobalt to rhenium in wt.% Greater than or equal to 1 and less than or equal to 2 can be selected.
- a corresponding alloy may have a density ⁇ 8.94 g per cm 3 , in particular ⁇ 8.85 g per cm 3, and preferably ⁇ 8.8 g per cm 3 .
- the nickel-based alloy of the present invention can be used both monocrystalline and directionally solidified, wherein monocrystalline components are used in particular for high-temperature applications in aircraft engine construction.
- the following table shows the composition of four alloys according to the invention with regard to the main constituents aluminum, cobalt, chromium, molybdenum, rhenium, ruthenium, tantalum, titanium, tungsten with the remainder nickel in% by weight, where further constituents, such as carbon, silicon, Manganese, phosphorus, sulfur, boron, copper, iron, hafnium, zirconium and yttrium may be present in total at a level of less than 0.7% by weight.
- alloys have the properties given in the table below.
- the highest possible MKH index is advantageous for the formation of a creep resistant and high temperature resistant alloy.
- the proportion of alloying elements in the matrix can be determined by measurements using an atomic probe or a transmission electron microscope.
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)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15181489.4A EP3133178B1 (fr) | 2015-08-19 | 2015-08-19 | Superalliage a base de nickel optimise |
ES15181489.4T ES2684780T3 (es) | 2015-08-19 | 2015-08-19 | Superaleación basada en níquel optimizada |
US15/234,072 US20170051382A1 (en) | 2015-08-19 | 2016-08-11 | Optimized nickel-based superalloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15181489.4A EP3133178B1 (fr) | 2015-08-19 | 2015-08-19 | Superalliage a base de nickel optimise |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3133178A1 true EP3133178A1 (fr) | 2017-02-22 |
EP3133178B1 EP3133178B1 (fr) | 2018-08-01 |
Family
ID=53886954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15181489.4A Not-in-force EP3133178B1 (fr) | 2015-08-19 | 2015-08-19 | Superalliage a base de nickel optimise |
Country Status (3)
Country | Link |
---|---|
US (1) | US20170051382A1 (fr) |
EP (1) | EP3133178B1 (fr) |
ES (1) | ES2684780T3 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4012061A1 (fr) | 2020-12-09 | 2022-06-15 | MTU Aero Engines AG | Alliage à base de nickel et composant le contenant |
EP4032997A1 (fr) | 2021-01-26 | 2022-07-27 | MTU Aero Engines AG | Alliage à base de nickel et composant fabriqué à partir de celui-ci |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2768947C1 (ru) * | 2021-06-24 | 2022-03-25 | Публичное акционерное общество "ОДК-Уфимское моторостроительное производственное объединение (ПАО "ОДК-УМПО") | Жаропрочный никелевый сплав для литья деталей с монокристаллической структурой |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0663462A1 (fr) * | 1994-01-03 | 1995-07-19 | General Electric Company | Superalliage à base de nickel |
EP1057899A2 (fr) * | 1999-05-26 | 2000-12-06 | General Electric Company | Compositions et articles monocristallines en superalliages de nickel, modifiés par hafnium et/ou zirconium |
US20050051242A1 (en) * | 2001-05-30 | 2005-03-10 | Yutaka Koizumi | Ni-based single crystal super alloy |
EP2128284A1 (fr) * | 2007-03-12 | 2009-12-02 | IHI Corporation | SUPERALLIAGE MONOCRISTALLIN À BASE DE Ni ET AUBE DE TURBINE L'UTILISANT |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6921586B2 (en) * | 2002-02-05 | 2005-07-26 | General Electric Company | Ni-Base superalloy having a coating system containing a diffusion barrier layer |
-
2015
- 2015-08-19 EP EP15181489.4A patent/EP3133178B1/fr not_active Not-in-force
- 2015-08-19 ES ES15181489.4T patent/ES2684780T3/es active Active
-
2016
- 2016-08-11 US US15/234,072 patent/US20170051382A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0663462A1 (fr) * | 1994-01-03 | 1995-07-19 | General Electric Company | Superalliage à base de nickel |
EP1057899A2 (fr) * | 1999-05-26 | 2000-12-06 | General Electric Company | Compositions et articles monocristallines en superalliages de nickel, modifiés par hafnium et/ou zirconium |
US20050051242A1 (en) * | 2001-05-30 | 2005-03-10 | Yutaka Koizumi | Ni-based single crystal super alloy |
EP2128284A1 (fr) * | 2007-03-12 | 2009-12-02 | IHI Corporation | SUPERALLIAGE MONOCRISTALLIN À BASE DE Ni ET AUBE DE TURBINE L'UTILISANT |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4012061A1 (fr) | 2020-12-09 | 2022-06-15 | MTU Aero Engines AG | Alliage à base de nickel et composant le contenant |
EP4032997A1 (fr) | 2021-01-26 | 2022-07-27 | MTU Aero Engines AG | Alliage à base de nickel et composant fabriqué à partir de celui-ci |
Also Published As
Publication number | Publication date |
---|---|
EP3133178B1 (fr) | 2018-08-01 |
US20170051382A1 (en) | 2017-02-23 |
ES2684780T3 (es) | 2018-10-04 |
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