US20050241797A1 - Method for producing a hollow cast component having an inner coating - Google Patents
Method for producing a hollow cast component having an inner coating Download PDFInfo
- Publication number
- US20050241797A1 US20050241797A1 US11/117,195 US11719505A US2005241797A1 US 20050241797 A1 US20050241797 A1 US 20050241797A1 US 11719505 A US11719505 A US 11719505A US 2005241797 A1 US2005241797 A1 US 2005241797A1
- Authority
- US
- United States
- Prior art keywords
- component
- coating
- cavity
- cast
- mold insert
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/165—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents in the manufacture of multilayered shell moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/002—Removing cores by leaching, washing or dissolving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/90—Coating; Surface treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/90—Coating; Surface treatment
Definitions
- the present invention relates to a method for producing a hollow cast component, in particular a hollow cast turbine blade, having an inner coating on the walls of at least one cavity.
- MCrAlY coatings are suitable as protection against oxidation and/or corrosion in this context.
- an MCrAlY coating should be understood as a coating of a metal alloy which comprises chromium (Cr) and aluminum (Al), and in which Y stands for yttrium or a rare earth element and M stands for iron (Fe), cobalt (Co) or nickel (Ni).
- the inner walls of hollow cast components operated in a strongly heating environment may also be exposed to temperatures which necessitate protection of the inner walls against oxidation and/or corrosion, so that the component can actually achieve the intended service life.
- Turbine components are examples of such hollow cast components subject to strong heating. During operation, turbine blades are exposed to high temperatures and generally have cavities through which the coolant is fed. Under certain operating conditions, temperatures that necessitate protection of the inner walls against oxidation and/or corrosion may occur in these cavities.
- the first object is achieved by a method as claimed in the claims, and the second object is achieved by a hollow cast turbine component as claimed in the claims.
- the component is cast from a base material.
- a casting mold which comprises at least one mold insert for defining at least one cavity is used for the casting.
- the coating material for the inner coating of the component is applied to at least one mold insert before the component is cast. The mold insert is then removed from the cavity after the casting.
- the inner coating is produced first and then the component is cast around it.
- an inner coating in particular with an MCrAlY inner coating.
- the material of the mold insert is in this case selected so that it can be removed from the cavity of the component once it is finished, without taking the coating material with it.
- those materials which can be removed from the cavity by means of a chemical method which does not attack the coating material and the base material of the component are suitable as the material for the mold insert.
- ceramic mold inserts which can be removed from cavities of turbine components by means of a suitable lye, which does not attack an MCrAlY coating or the base material of turbine components. Ceramic materials, in particular, are therefore suitable as materials for mold inserts to cast turbine components, for instance turbine blades.
- the casting temperature when casting the component is particularly selected so that it is lower than the melting temperature of the coating material, so as to avoid melting the coating material during the casting process and therefore mixing with the base material of the component.
- the application of the coating material to the mold insert may, for example, be carried out by means of high-energy spray methods (high-velocity oxygen fuel spraying, abbreviated to HVOF) or plasma spraying (abbreviated to APS).
- high-energy spray methods high-velocity oxygen fuel spraying, abbreviated to HVOF
- plasma spraying abbreviated to APS
- a hollow cast turbine blade according to the invention has at least one cavity and an inner coating present in the cavity, in particular an MCrAlY coating.
- FIG. 1 shows a hollow cast turbine component in a schematic representation.
- FIGS. 2-7 show various stages in the production of the hollow cast turbine blade as a highly schematized representation.
- FIG. 1 schematically represents a hollow cast turbine blade 1 in a sectional view.
- the turbine blade 1 comprises a blade body 2 in which, in the present exemplary embodiment, four cavities 3 , 5 , 7 , 9 are formed which, for example, are used to feed cooling air through.
- the blade body 2 has an outer surface 12 , which is provided with an MCrAlY coating for protection against oxidation and/or corrosion.
- the blade body 2 also has inner surfaces 4 , 6 , 8 , 10 which bound the cavities 3 , 5 , 7 , 9 and form the inner walls of the cavities.
- the inner surfaces 4 , 6 , 8 , 10 are likewise provided with an MCrAlY coating 14 , 16 , 18 , 20 in order to protect them too against oxidation and/or corrosion.
- the method for producing the turbine blade 1 described with reference to FIG. I will be explained below with reference to FIGS. 2 to 7 .
- the method may, however, also be employed for the inner coatings of other hollow cast components.
- a ceramic mold insert 22 for the casting mold to produce the turbine blade is formed and sintered ( FIG. 2 ).
- an MCrAlY coating 14 is applied to the ceramic mold insert 22 .
- a high-energy spray method such as high-velocity oxygen fuel spraying (HVOF) or plasma spraying (APS) may be used for this purpose.
- HVOF high-velocity oxygen fuel spraying
- APS plasma spraying
- the thickness with which the MCrAlY coating 14 is applied to the mold insert depends on the thickness with which the inner walls of the turbine blade are intended to be coated.
- a wax model 24 of the turbine blade is injected onto the mold insert 22 ( FIG. 4 ).
- the outer mold half 26 of the mold is then applied to the wax model 24 .
- the wax is then burnt off and the mold half 26 is sintered in order to make the casting mold 28 ( FIG. 5 ).
- the turbine blade 1 is cast in a vacuum.
- the casting of the turbine blade typically takes place at casting temperatures of less than 1500° C.
- the melting point of the MCrAlY coating 14 is typically more than 1600° C. Melting of the coating 14 during the casting process, and therefore mixing of the coating material with the base material of the turbine blade 1 , do not therefore take place.
- the casting temperatures must also be lower than the melting temperature of the coating material, if melting of the coating and mixing with the base material are intended to be avoided.
- the mold half 26 is removed and the blade 1 is cleaned ( FIG. 6 ).
- the mold insert 22 is leached, i.e. the ceramic mold insert 22 is removed from the solidified turbine blade 1 by means of a lye. Since the MCrAlY coating 14 as well as the blade material are resistant to the lyes being used, the MCrAlY coating 14 remains on the inside of the turbine blade I when the ceramic mold insert 22 is leached ( FIG. 7 ). The turbine blade produced in this way can then be mechanically processed in the conventional way and coated on the outside.
- the described method is suitable not only for inner coatings of turbine blades but, in principle, also for inner coatings of other hollow cast components. It is likewise possible to use the method to apply coatings other than MCrAlY coatings.
- the mold insert need not necessarily be made of a ceramic material. It is merely necessary to ensure that the mold insert can be removed without taking with it the coating applied to the inside of the workpiece.
Abstract
In the method according to the invention for producing a hollow cast component having an inner coating in at least one cavity, the component is cast from a base material. A casting mold, which comprises at least one mold insert for defining at least one cavity is used for the casting. In the method according to the invention, the coating material for the inner coating of the component is applied to at least one mold insert before the component is cast. The mold insert is then removed from the cavity after the casting.
Description
- This application claims priority of the European application No. 04010492.9 EP filed May 3, 2004, which is incorporated by reference herein in its entirety.
- The present invention relates to a method for producing a hollow cast component, in particular a hollow cast turbine blade, having an inner coating on the walls of at least one cavity.
- Components subject to strong heating may be provided with a coating on their outside in order to protect them against corrosion and/or oxidation in the strongly heating environment. MCrAlY coatings, in particular, are suitable as protection against oxidation and/or corrosion in this context. In the scope of the present description, an MCrAlY coating should be understood as a coating of a metal alloy which comprises chromium (Cr) and aluminum (Al), and in which Y stands for yttrium or a rare earth element and M stands for iron (Fe), cobalt (Co) or nickel (Ni).
- Under certain operating conditions, however, the inner walls of hollow cast components operated in a strongly heating environment may also be exposed to temperatures which necessitate protection of the inner walls against oxidation and/or corrosion, so that the component can actually achieve the intended service life.
- Turbine components, especially turbine blades, are examples of such hollow cast components subject to strong heating. During operation, turbine blades are exposed to high temperatures and generally have cavities through which the coolant is fed. Under certain operating conditions, temperatures that necessitate protection of the inner walls against oxidation and/or corrosion may occur in these cavities.
- To date, the inner walls of hollow cast components have been more or less satisfactorily protected by diffusion aluminizing. These aluminizations reach their limits as the operating temperatures increase, however, and they are virtually ineffective against corrosion.
- With conventional methods, it is virtually impossible to apply particularly effective MCrAlY coatings in the sometimes very complicated cavities or interiors of hollow cast components. Spray processes cannot be employed satisfactorily for coating the inner walls of hollow cast components.
- It is therefore an object of the present invention to provide a method by which inner coatings, especially MCrAlY inner coatings, can be produced even in complex cavities of hollow cast components.
- It is also an object of the present invention to provide an improved hollow cast turbine component.
- The first object is achieved by a method as claimed in the claims, and the second object is achieved by a hollow cast turbine component as claimed in the claims.
- In the method according to the invention for producing a hollow cast component having an inner coating in at least one cavity, the component is cast from a base material. A casting mold, which comprises at least one mold insert for defining at least one cavity is used for the casting. In the method according to the invention, the coating material for the inner coating of the component is applied to at least one mold insert before the component is cast. The mold insert is then removed from the cavity after the casting.
- According to the invention, therefore, the inner coating is produced first and then the component is cast around it. In this way, it is even possible for extremely complex cavities or interiors of components, for instance hollow cast gas turbine blades, to be provided with an inner coating, in particular with an MCrAlY inner coating. The material of the mold insert is in this case selected so that it can be removed from the cavity of the component once it is finished, without taking the coating material with it.
- In particular, those materials which can be removed from the cavity by means of a chemical method which does not attack the coating material and the base material of the component are suitable as the material for the mold insert. For example, it is possible to produce ceramic mold inserts which can be removed from cavities of turbine components by means of a suitable lye, which does not attack an MCrAlY coating or the base material of turbine components. Ceramic materials, in particular, are therefore suitable as materials for mold inserts to cast turbine components, for instance turbine blades.
- In the method according to the invention, the casting temperature when casting the component is particularly selected so that it is lower than the melting temperature of the coating material, so as to avoid melting the coating material during the casting process and therefore mixing with the base material of the component.
- The application of the coating material to the mold insert may, for example, be carried out by means of high-energy spray methods (high-velocity oxygen fuel spraying, abbreviated to HVOF) or plasma spraying (abbreviated to APS).
- A hollow cast turbine blade according to the invention has at least one cavity and an inner coating present in the cavity, in particular an MCrAlY coating.
- Owing to the inner coating of the hollow cast turbine component, it has improved oxidation and corrosion properties compared with hollow cast turbine components according to the prior art. It can therefore be exposed to higher temperatures.
- Other features, properties and advantages of the present invention will be found in the following description of an exemplary embodiment with reference to the appended figure.
-
FIG. 1 shows a hollow cast turbine component in a schematic representation. -
FIGS. 2-7 show various stages in the production of the hollow cast turbine blade as a highly schematized representation. -
FIG. 1 schematically represents a hollowcast turbine blade 1 in a sectional view. Theturbine blade 1 comprises ablade body 2 in which, in the present exemplary embodiment, fourcavities 3, 5, 7, 9 are formed which, for example, are used to feed cooling air through. Theblade body 2 has anouter surface 12, which is provided with an MCrAlY coating for protection against oxidation and/or corrosion. Theblade body 2 also hasinner surfaces cavities 3, 5, 7, 9 and form the inner walls of the cavities. Theinner surfaces MCrAlY coating - The method for producing the
turbine blade 1 described with reference to FIG. I will be explained below with reference to FIGS. 2 to 7. The method may, however, also be employed for the inner coatings of other hollow cast components. - Firstly, a ceramic mold insert 22 for the casting mold to produce the turbine blade is formed and sintered (
FIG. 2 ). In the next step (FIG. 3 ) anMCrAlY coating 14 is applied to theceramic mold insert 22. For example, a high-energy spray method such as high-velocity oxygen fuel spraying (HVOF) or plasma spraying (APS) may be used for this purpose. The thickness with which theMCrAlY coating 14 is applied to the mold insert depends on the thickness with which the inner walls of the turbine blade are intended to be coated. - After the mold insert has been coated, a
wax model 24 of the turbine blade is injected onto the mold insert 22 (FIG. 4 ). Theouter mold half 26 of the mold is then applied to thewax model 24. The wax is then burnt off and themold half 26 is sintered in order to make the casting mold 28 (FIG. 5 ). - After the
casting mold 28 has been made, theturbine blade 1 is cast in a vacuum. The casting of the turbine blade typically takes place at casting temperatures of less than 1500° C. The melting point of theMCrAlY coating 14, on the other hand, is typically more than 1600° C. Melting of thecoating 14 during the casting process, and therefore mixing of the coating material with the base material of theturbine blade 1, do not therefore take place. When using coatings other than the MCrAlY coating, the casting temperatures must also be lower than the melting temperature of the coating material, if melting of the coating and mixing with the base material are intended to be avoided. - After the end of the casting, the
mold half 26 is removed and theblade 1 is cleaned (FIG. 6 ). Lastly, themold insert 22 is leached, i.e. theceramic mold insert 22 is removed from thesolidified turbine blade 1 by means of a lye. Since the MCrAlY coating 14 as well as the blade material are resistant to the lyes being used, theMCrAlY coating 14 remains on the inside of the turbine blade I when theceramic mold insert 22 is leached (FIG. 7 ). The turbine blade produced in this way can then be mechanically processed in the conventional way and coated on the outside. - The described method is suitable not only for inner coatings of turbine blades but, in principle, also for inner coatings of other hollow cast components. It is likewise possible to use the method to apply coatings other than MCrAlY coatings. Furthermore, the mold insert need not necessarily be made of a ceramic material. It is merely necessary to ensure that the mold insert can be removed without taking with it the coating applied to the inside of the workpiece.
- In respect of the tools for producing the mold inserts and the wax models, care should be taken to correct these by the thickness of the protective layer in order to ensure the specified wall thicknesses of the hollow cast component.
Claims (15)
1-8. (canceled)
9. A method for producing a hollow cast turbine component having an inner coating in a cavity, comprising:
providing a cast mold comprising a mold insert defining at least one cavity to cast a component;
applying a coating material to the portion of the cast mold that defines the at least one cavity;
casting the component from a base material using the cast mold;
removing the mold insert from the cavity of the component after the casting.
10. The method as claimed in claim 9 , wherein a material that can be removed from the cavity by a chemical method and that does not attack the coating material and the base material of the component is used as the material for the mold insert.
11. The method as claimed in claim 9 , wherein a ceramic material is used as the material for the mold insert.
12. The method as claimed in claim 9 , wherein the casting temperature is lower than the melting temperature of the coating material.
13. The method as claimed in claim 9 , wherein the inner coating is an MCrAlY coating.
14. The method as claimed in claim 13 , wherein a high-energy spray method is used for applying the coating material to the mold insert.
15. The method as claimed in claim 13 , wherein the turbine component is a turbine blade or a turbine vane.
16. The method as claimed in claim 13 , wherein at least one of the portions of the cast mold defining a cavity are coated.
17. A hollow cast turbine component, comprising:
a base material;
a cavity having an inner surface; and
an inner coating material present on the cavity inner surface.
18. The hollow cast turbine component as claimed in claim 17 , wherein the inner coating material is MCrAlY.
19. The hollow cast turbine component as claimed in claim 17 , wherein the component is cast from the base material using a cast mold comprising a mold insert for defining the cavity.
20. The hollow cast turbine component as claimed in claim 17 , wherein a material that can be removed from the cavity by a chemical method and that does not attack the coating material and the base material of the component is used as the material for the mold insert.
21. The hollow cast turbine component as claimed in claim 17 , wherein a ceramic material is used as the material for the mold insert.
22. The hollow cast turbine component as claimed in claim 17 , wherein the casting temperature is lower than the melting temperature of the coating material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04010492.9 | 2004-05-03 | ||
EP04010492A EP1593445B1 (en) | 2004-05-03 | 2004-05-03 | Process of making a hollow member having an internal coating |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050241797A1 true US20050241797A1 (en) | 2005-11-03 |
Family
ID=34924837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/117,195 Abandoned US20050241797A1 (en) | 2004-05-03 | 2005-04-28 | Method for producing a hollow cast component having an inner coating |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050241797A1 (en) |
EP (1) | EP1593445B1 (en) |
CN (1) | CN1318160C (en) |
DE (1) | DE502004004360D1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110171394A1 (en) * | 2008-08-26 | 2011-07-14 | Allen David B | Method of making a combustion turbine component using thermally sprayed transient liquid phase forming layer |
US20110256321A1 (en) * | 2007-11-28 | 2011-10-20 | Reynolds George H | Article having composite layer |
US20140183782A1 (en) * | 2013-01-03 | 2014-07-03 | General Electric Company | Mold assembly for forming a cast component and method of manufacturing a mold assembly |
US20150183026A1 (en) * | 2013-12-27 | 2015-07-02 | United Technologies Corporation | Investment mold having metallic donor element |
CN104812994A (en) * | 2012-11-13 | 2015-07-29 | 西门子能量股份有限公司 | Process for forming a long gas turbine engine blade having a main wall with a thin portion near a tip |
US9975173B2 (en) | 2013-06-03 | 2018-05-22 | United Technologies Corporation | Castings and manufacture methods |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2329901A1 (en) * | 2009-12-03 | 2011-06-08 | Siemens Aktiengesellschaft | Mould with stabilised internal casting core, casting method and casting part |
CN102581217A (en) * | 2012-02-20 | 2012-07-18 | 含山县全兴内燃机配件有限公司 | Preparation method of composite casting-infiltration layer used for working inner cavities of internal-combustion engine |
FR3071867B1 (en) * | 2017-10-02 | 2020-07-31 | Safran Aircraft Engines | COMPOSITE AUBE WITH CERAMIC MATRIX AND PROCESS FOR MANUFACTURING SUCH A BLADE |
US20200164431A1 (en) * | 2018-11-28 | 2020-05-28 | GM Global Technology Operations LLC | Methods for manufacturing cast components with integral thermal barrier coatings |
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US4332843A (en) * | 1981-03-23 | 1982-06-01 | General Electric Company | Metallic internal coating method |
US4532974A (en) * | 1981-07-03 | 1985-08-06 | Rolls-Royce Limited | Component casting |
US4548256A (en) * | 1982-11-03 | 1985-10-22 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Casting of metal articles |
US5215785A (en) * | 1990-11-10 | 1993-06-01 | Mtu Motoren- Und Turbinen- Union Muenchen Gmbh | Method for the powder pack coating of hollow bodies |
US5915452A (en) * | 1995-06-07 | 1999-06-29 | Howmet Research Corporation | Apparatus for removing cores from castings |
US6029736A (en) * | 1997-08-29 | 2000-02-29 | Howmet Research Corporation | Reinforced quartz cores for directional solidification casting processes |
US7055574B2 (en) * | 2004-07-27 | 2006-06-06 | Honeywell International Inc. | Method of producing metal article having internal passage coated with a ceramic coating |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SK23293A3 (en) * | 1990-09-25 | 1993-07-07 | Allied Signal Inc | Production of complex cavities inside castings or semi solid forms |
DE19856901C2 (en) * | 1998-12-10 | 2003-01-16 | Mtu Aero Engines Gmbh | Process for coating hollow bodies |
-
2004
- 2004-05-03 EP EP04010492A patent/EP1593445B1/en not_active Not-in-force
- 2004-05-03 DE DE502004004360T patent/DE502004004360D1/en active Active
-
2005
- 2005-04-27 CN CNB2005100689161A patent/CN1318160C/en not_active Expired - Fee Related
- 2005-04-28 US US11/117,195 patent/US20050241797A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4332843A (en) * | 1981-03-23 | 1982-06-01 | General Electric Company | Metallic internal coating method |
US4532974A (en) * | 1981-07-03 | 1985-08-06 | Rolls-Royce Limited | Component casting |
US4548256A (en) * | 1982-11-03 | 1985-10-22 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Casting of metal articles |
US5215785A (en) * | 1990-11-10 | 1993-06-01 | Mtu Motoren- Und Turbinen- Union Muenchen Gmbh | Method for the powder pack coating of hollow bodies |
US5915452A (en) * | 1995-06-07 | 1999-06-29 | Howmet Research Corporation | Apparatus for removing cores from castings |
US6029736A (en) * | 1997-08-29 | 2000-02-29 | Howmet Research Corporation | Reinforced quartz cores for directional solidification casting processes |
US7055574B2 (en) * | 2004-07-27 | 2006-06-06 | Honeywell International Inc. | Method of producing metal article having internal passage coated with a ceramic coating |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110256321A1 (en) * | 2007-11-28 | 2011-10-20 | Reynolds George H | Article having composite layer |
US20110171394A1 (en) * | 2008-08-26 | 2011-07-14 | Allen David B | Method of making a combustion turbine component using thermally sprayed transient liquid phase forming layer |
CN104812994A (en) * | 2012-11-13 | 2015-07-29 | 西门子能量股份有限公司 | Process for forming a long gas turbine engine blade having a main wall with a thin portion near a tip |
US20140183782A1 (en) * | 2013-01-03 | 2014-07-03 | General Electric Company | Mold assembly for forming a cast component and method of manufacturing a mold assembly |
US9975173B2 (en) | 2013-06-03 | 2018-05-22 | United Technologies Corporation | Castings and manufacture methods |
US11213885B2 (en) | 2013-06-03 | 2022-01-04 | Raytheon Technologies Corporation | Castings and manufacture methods |
US20150183026A1 (en) * | 2013-12-27 | 2015-07-02 | United Technologies Corporation | Investment mold having metallic donor element |
Also Published As
Publication number | Publication date |
---|---|
EP1593445A1 (en) | 2005-11-09 |
DE502004004360D1 (en) | 2007-08-30 |
CN1318160C (en) | 2007-05-30 |
EP1593445B1 (en) | 2007-07-18 |
CN1693006A (en) | 2005-11-09 |
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