US20020029863A1 - Method for producing a cooled, lost-wax cast part - Google Patents
Method for producing a cooled, lost-wax cast part Download PDFInfo
- Publication number
- US20020029863A1 US20020029863A1 US09/921,587 US92158701A US2002029863A1 US 20020029863 A1 US20020029863 A1 US 20020029863A1 US 92158701 A US92158701 A US 92158701A US 2002029863 A1 US2002029863 A1 US 2002029863A1
- Authority
- US
- United States
- Prior art keywords
- cast part
- wax
- core
- casting mold
- producing
- 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
Images
Classifications
-
- 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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/49336—Blade making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49988—Metal casting
- Y10T29/49989—Followed by cutting or removing material
Definitions
- the invention relates to a method for producing a cooled cast part produced by a lost-wax process for a thermal turbo machine according to the preamble of claim 1 .
- Cast parts for thermal turbo machines are produced using known casting processes.
- Casting furnaces for such casting processes are known, for example, from publications EP-A1-749 790, U.S. Pat. No. 3,763,926, or U.S. Pat. No. 3,690,367.
- the casting molds usually are provided in the form of a wax model.
- a process for producing a complex part of a gas turbine using a casting mold is known, for example, from publication U.S. Pat. No. 5,296,308.
- a core is placed into the wax model.
- This core contains the structure of the cavity that forms a specific cooling structure inside the casting part.
- a wax seal must be applied between the wax model and the core in order to prevent the slip, that in its dry form forms the casting mold, from penetrating into the intermediate space.
- the wax seal is applied by hand onto a step adjoining the core.
- This step has the ultimate purpose of holding a cooling plate.
- the cooling plate is soldered or welded onto the step and is used, by means of cooling holes, for impact-cooling the platform located below it.
- the surface of this step should be smooth. But this is in contradiction with the applied wax seal that, after casting, results in an accumulation of material above the step.
- an additional process step for example grinding or eroding, is necessary.
- the invention is based on the objective of creating a method for producing a thermally loaded and cooled cast part for a thermal turbo machine by using a known casting process, whereby the casting mold of the cast part is produced with a wax model and a ceramic core, and the subsequent production steps are simplified and optimized.
- this objective is realized with a method according to the preamble of Claim 1 in that, prior to the production of the casting mold of the cast part between the wax model and the core, the wax seal is applied to only one shoulder that is located above the step in the direction towards the side of the core.
- FIG. 1 shows a model of a turbine blade
- FIG. 2 shows a section through a turbine blade according to the invention along to line II-II in FIG. 1, and
- FIG. 3 shows a section through a turbine blade according to the invention along line II-II in FIG. 1 after a successful casting process.
- the invention relates to a method for producing a thermally loaded and cooled lost-wax cast part for a thermal turbo machine.
- this may be, for example, a guide or rotating blade, or other cooled rotor or stator segments of a gas turbine or compressor.
- the cast parts are produced using casting furnaces known generally from the state of the art. By using such casting furnaces, complex components that can be subjected to high thermal and mechanical loads can be created. Depending on the process conditions, it is hereby possible to produce the cast body in a directionally solidified manner. It can hereby be constructed as a single crystal (SX) or polycrystalline, as fringe crystals that have a preferred direction (“directionally solidified”, DS). It is especially important that the directional solidification takes place under conditions at which an intensive heat-exchange takes place between a cooled part of a casting mold holding a molten starting material and the still molten starting material. This permits the formation of a zone of directionally solidified material with a solidification front that, when the heat is continuously withdrawn, migrates through the casting mold while forming the directionally solidified cast part.
- SX single crystal
- DS fringe crystals
- Publication EP-A1-749 790 discloses such a process and apparatus for producing a directionally solidified cast part.
- the apparatus comprises a vacuum chamber that contains an upper heating chamber and a lower cooling chamber. The two chambers are separated from each other by a baffle.
- the vacuum chamber accepts a casting mold that is filled with a molten mass.
- a super-alloy based on nickel can be used, for example.
- the baffle is provided in the center with an opening through which the casting mold is moved slowly during the process from the heating chamber to the cooling chamber, so that the cast part directionally solidifies from the top to the bottom.
- the downward movement is brought about with a drive rod on which the casting mold is positioned.
- the bottom of the casting mold is constructed with water cooling.
- means for generating and guiding a gas stream are provided below the baffle. Through the gas stream next to the lower cooling chamber, these means ensure additional cooling and therefore a greater temperature gradient at the solidification front.
- this type of casting furnaces is used for producing monocrystalline or directionally solidified cast parts, but it is not limited to this. In principle, the solidification also can take place non-directionally.
- FIG. 1 shows a wax model 10 of a cast part 1 , for example a turbine blade to be cast.
- the turbine blade is provided with a platform 2 , a blade vane 3 , and blade tip 2 .
- This wax model 10 then is immersed into a liquid, ceramic material, also called a slip.
- the later casting mold of cast part 1 is formed around the wax model 10 .
- the ceramic model is then dried so that the casting mold with which the cast part 1 is produced is created.
- the wax is removed using a suitable heat treatment, i.e. is burnt away.
- the casting mold is also fired, i.e. it receives its strength in this way.
- the cast part 1 is produced in a known manner with the casting mold created in this way by using a known casting furnace that was described in more detail above.
- the ceramic casting mold and the core are later removed in an appropriate manner, for example by using a strong acid or base.
- the turbine blade of FIG. 1 has a cavity into which cooling air is passed during the operation of the turbo machine. This cooling air is able to leave the finished turbine blade again through cooling holes 5 .
- a ceramic core 6 that reflects the internal geometry of the cavity is provided during the production process of the casting mold in the later cavity of the wax model 10 .
- the platform 2 is cooled additionally by impact cooling.
- a cooling plate 11 provided with cooling holes 12 is soldered or welded to a step 7 next to the ceramic core 6 and on the edge of the platform 2 in this cast component. This cooling plate 11 is described in more detail in reference to FIG. 3.
- a wax seal 8 is manually provided between the ceramic core 6 and shoulder 9 .
- This wax seal 8 has the objective of preventing the undesired penetration of slip into the inner chamber of the ceramic core 6 .
- FIG. 2 shows a section along line II-II of FIG. 1 that extends through the step 7 , the wax seal 8 , and through the ceramic core 6 .
- the wax seal 8 is provided only on a shoulder 9 located above the step 7 towards the ceramic core 6 .
- This process results in two advantages.
- the step 7 and wax seal 8 create additional, cast material on the turbine blade. As seen in FIG. 3, this material has a specific height s and can be machined, i.e. ground off, independently from step 7 or independently from the surface of step 7 . This uniform process step also may be performed by erosion.
- the step 7 to which the cooling plate 11 is soldered remains unaffected, which in any case ensures a smooth surface of the step 7 .
- the cooling air 13 penetrates through the cooling holes 12 and in this way is able to cool the platform 2 by impact cooling.
- the smooth surface of the step 7 is important since even small rough areas could reduce the cooling effect of this impact cooling as a result of leakage losses.
- Another advantage is that the existing shoulder 9 prevents the liquid solder that distributes itself over the entire step 7 from flowing into the cavity of the cast part 1 . Since during the operation of the cast part an insert will be located in its cavity also, it is important that no solder adheres to this insert and thus adversely affects its proper function.
Abstract
Description
- The invention relates to a method for producing a cooled cast part produced by a lost-wax process for a thermal turbo machine according to the preamble of
claim 1. - Cast parts for thermal turbo machines are produced using known casting processes. Casting furnaces for such casting processes are known, for example, from publications EP-A1-749 790, U.S. Pat. No. 3,763,926, or U.S. Pat. No. 3,690,367. The casting molds usually are provided in the form of a wax model. A process for producing a complex part of a gas turbine using a casting mold is known, for example, from publication U.S. Pat. No. 5,296,308.
- Depending on the specific embodiment, a core is placed into the wax model. This core contains the structure of the cavity that forms a specific cooling structure inside the casting part. In these casting parts, a wax seal must be applied between the wax model and the core in order to prevent the slip, that in its dry form forms the casting mold, from penetrating into the intermediate space. The wax seal is applied by hand onto a step adjoining the core. This step has the ultimate purpose of holding a cooling plate. The cooling plate is soldered or welded onto the step and is used, by means of cooling holes, for impact-cooling the platform located below it. In order to prevent leakages of cooling air, the surface of this step should be smooth. But this is in contradiction with the applied wax seal that, after casting, results in an accumulation of material above the step. In order to get closer to the goal of a smooth surface of the step, an additional process step, for example grinding or eroding, is necessary.
- The invention is based on the objective of creating a method for producing a thermally loaded and cooled cast part for a thermal turbo machine by using a known casting process, whereby the casting mold of the cast part is produced with a wax model and a ceramic core, and the subsequent production steps are simplified and optimized.
- According to the invention, this objective is realized with a method according to the preamble of
Claim 1 in that, prior to the production of the casting mold of the cast part between the wax model and the core, the wax seal is applied to only one shoulder that is located above the step in the direction towards the side of the core. - This provides the advantage that even during the casting process it can already be prevented that rough areas are created on the step that would result in a leakage of the cooling air at the cooling plate. The material that is created during the casting process as a result of the wax seal and the shoulder can be ground off or removed using another appropriate manner with a uniform process step without forming rough areas on the step. A cooling plate can be soldered to this step without any additional process steps.
- The invention is described in reference to the enclosed drawings, whereby
- FIG. 1 shows a model of a turbine blade,
- FIG. 2 shows a section through a turbine blade according to the invention along to line II-II in FIG. 1, and
- FIG. 3 shows a section through a turbine blade according to the invention along line II-II in FIG. 1 after a successful casting process.
- Only those elements essential to the invention are shown. Identical elements are designated with the same reference characters in the different drawings.
- The invention relates to a method for producing a thermally loaded and cooled lost-wax cast part for a thermal turbo machine. In particular, this may be, for example, a guide or rotating blade, or other cooled rotor or stator segments of a gas turbine or compressor. These cast parts and the method according to the invention for their production are explained in more detail below in reference to the enclosed figures.
- The cast parts are produced using casting furnaces known generally from the state of the art. By using such casting furnaces, complex components that can be subjected to high thermal and mechanical loads can be created. Depending on the process conditions, it is hereby possible to produce the cast body in a directionally solidified manner. It can hereby be constructed as a single crystal (SX) or polycrystalline, as fringe crystals that have a preferred direction (“directionally solidified”, DS). It is especially important that the directional solidification takes place under conditions at which an intensive heat-exchange takes place between a cooled part of a casting mold holding a molten starting material and the still molten starting material. This permits the formation of a zone of directionally solidified material with a solidification front that, when the heat is continuously withdrawn, migrates through the casting mold while forming the directionally solidified cast part.
- Publication EP-A1-749 790, for example, discloses such a process and apparatus for producing a directionally solidified cast part. The apparatus comprises a vacuum chamber that contains an upper heating chamber and a lower cooling chamber. The two chambers are separated from each other by a baffle. The vacuum chamber accepts a casting mold that is filled with a molten mass. In order to produce thermally and mechanically loadable parts, such as guide or rotating blades for gas turbines, a super-alloy based on nickel can be used, for example. The baffle is provided in the center with an opening through which the casting mold is moved slowly during the process from the heating chamber to the cooling chamber, so that the cast part directionally solidifies from the top to the bottom. The downward movement is brought about with a drive rod on which the casting mold is positioned. The bottom of the casting mold is constructed with water cooling. Below the baffle, means for generating and guiding a gas stream are provided. Through the gas stream next to the lower cooling chamber, these means ensure additional cooling and therefore a greater temperature gradient at the solidification front.
- A similar process, which in addition to the heating and cooling chamber works with an additional gas cooler, is also known, for example, from U.S. Pat. No. 3,690,367.
- Another process for producing a directionally solidified cast part is known from publication U.S. Pat. No. 3,763,926. In this process, a casting mold filled with a molten alloy is immersed continuously into a bath heated to approximately 260° C. This achieves a particularly rapid removal of heat from the casting mold. This and other, similar processes are known under the name of LMC (liquid metal cooling).
- For the invention, it is advantageous, that this type of casting furnaces is used for producing monocrystalline or directionally solidified cast parts, but it is not limited to this. In principle, the solidification also can take place non-directionally.
- FIG. 1 shows a
wax model 10 of acast part 1, for example a turbine blade to be cast. The turbine blade is provided with aplatform 2, ablade vane 3, andblade tip 2. Thiswax model 10 then is immersed into a liquid, ceramic material, also called a slip. Hereby the later casting mold ofcast part 1 is formed around thewax model 10. The ceramic model is then dried so that the casting mold with which thecast part 1 is produced is created. After the slip is dried, the wax is removed using a suitable heat treatment, i.e. is burnt away. During the process step, the casting mold is also fired, i.e. it receives its strength in this way. Thecast part 1 is produced in a known manner with the casting mold created in this way by using a known casting furnace that was described in more detail above. The ceramic casting mold and the core are later removed in an appropriate manner, for example by using a strong acid or base. - The turbine blade of FIG. 1 has a cavity into which cooling air is passed during the operation of the turbo machine. This cooling air is able to leave the finished turbine blade again through cooling holes5. As seen in FIG. 1, a
ceramic core 6 that reflects the internal geometry of the cavity is provided during the production process of the casting mold in the later cavity of thewax model 10. In the shown turbine blade, theplatform 2 is cooled additionally by impact cooling. Hereby acooling plate 11 provided withcooling holes 12 is soldered or welded to astep 7 next to theceramic core 6 and on the edge of theplatform 2 in this cast component. This coolingplate 11 is described in more detail in reference to FIG. 3. - Prior to the production of the casting mold, a
wax seal 8 is manually provided between theceramic core 6 andshoulder 9. Thiswax seal 8 has the objective of preventing the undesired penetration of slip into the inner chamber of theceramic core 6. - FIG. 2 shows a section along line II-II of FIG. 1 that extends through the
step 7, thewax seal 8, and through theceramic core 6. According to the invention, thewax seal 8 is provided only on ashoulder 9 located above thestep 7 towards theceramic core 6. This process results in two advantages. During the casting process, thestep 7 andwax seal 8 create additional, cast material on the turbine blade. As seen in FIG. 3, this material has a specific height s and can be machined, i.e. ground off, independently fromstep 7 or independently from the surface ofstep 7. This uniform process step also may be performed by erosion. In spite of this additional process step, thestep 7 to which thecooling plate 11 is soldered remains unaffected, which in any case ensures a smooth surface of thestep 7. The coolingair 13 penetrates through the cooling holes 12 and in this way is able to cool theplatform 2 by impact cooling. The smooth surface of thestep 7 is important since even small rough areas could reduce the cooling effect of this impact cooling as a result of leakage losses. Another advantage is that the existingshoulder 9 prevents the liquid solder that distributes itself over theentire step 7 from flowing into the cavity of thecast part 1. Since during the operation of the cast part an insert will be located in its cavity also, it is important that no solder adheres to this insert and thus adversely affects its proper function.
Claims (5)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10038453A DE10038453A1 (en) | 2000-08-07 | 2000-08-07 | Production of a cooled cast part of a thermal turbo machine comprises applying a wax seal to an offset between a wax model a core before producing the casting mold, the offset being located above the step to the side of the core. |
DE10032453.6 | 2000-08-07 | ||
DE10038453 | 2000-08-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020029863A1 true US20020029863A1 (en) | 2002-03-14 |
US6435256B1 US6435256B1 (en) | 2002-08-20 |
Family
ID=7651569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/921,587 Expired - Lifetime US6435256B1 (en) | 2000-08-07 | 2001-08-06 | Method for producing a cooled, lost-wax cast part |
Country Status (3)
Country | Link |
---|---|
US (1) | US6435256B1 (en) |
EP (1) | EP1193006B1 (en) |
DE (2) | DE10038453A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040133915A1 (en) * | 2002-11-08 | 2004-07-08 | Moody William H. | System and method for controlling access to media libraries |
WO2018156255A1 (en) * | 2017-02-22 | 2018-08-30 | General Electric Company | Method of manufacturing turbine airfoil with open tip casting and tip component thereof |
EP3549693A1 (en) * | 2018-04-05 | 2019-10-09 | United Technologies Corporation | Turbine blades and vanes for gas turbine engine |
US10625342B2 (en) | 2017-02-22 | 2020-04-21 | General Electric Company | Method of repairing turbine component |
US10702958B2 (en) | 2017-02-22 | 2020-07-07 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof using ceramic core with witness feature |
US10717130B2 (en) | 2017-02-22 | 2020-07-21 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof |
US11154956B2 (en) | 2017-02-22 | 2021-10-26 | General Electric Company | Method of repairing turbine component using ultra-thin plate |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10255346A1 (en) * | 2002-11-28 | 2004-06-09 | Alstom Technology Ltd | Method of making a turbine blade |
GB0413027D0 (en) * | 2004-06-11 | 2004-07-14 | Rolls Royce Plc | A wax recovery method |
US20080257517A1 (en) * | 2005-12-16 | 2008-10-23 | General Electric Company | Mold assembly for use in a liquid metal cooled directional solidification furnace |
US9403208B2 (en) | 2010-12-30 | 2016-08-02 | United Technologies Corporation | Method and casting core for forming a landing for welding a baffle inserted in an airfoil |
FR3035604B1 (en) * | 2015-04-30 | 2023-01-13 | Snecma | PATTERN MANUFACTURING PROCESS FOR LOST PATTERN FOUNDRY |
US20180238173A1 (en) * | 2017-02-22 | 2018-08-23 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof |
US10830354B2 (en) | 2018-05-18 | 2020-11-10 | General Electric Company | Protection system with gasket for ceramic core processing operation and related method |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3177537A (en) * | 1962-12-27 | 1965-04-13 | Prec Metalsmiths Inc | Methods and apparatus for forming investment molds and mold produced thereby |
US3494709A (en) * | 1965-05-27 | 1970-02-10 | United Aircraft Corp | Single crystal metallic part |
US3690367A (en) * | 1968-07-05 | 1972-09-12 | Anadite Inc | Apparatus for the restructuring of metals |
US3648760A (en) * | 1970-04-27 | 1972-03-14 | Abraham J Cooper | Precision investment casting apparatus |
US3763926A (en) * | 1971-09-15 | 1973-10-09 | United Aircraft Corp | Apparatus for casting of directionally solidified articles |
GB2111359A (en) * | 1981-10-23 | 1983-06-29 | Howmet Turbine Components | Microwave heating |
GB2205261B (en) * | 1987-06-03 | 1990-11-14 | Rolls Royce Plc | Method of manufacture and article manufactured thereby |
US5489194A (en) * | 1990-09-14 | 1996-02-06 | Hitachi, Ltd. | Gas turbine, gas turbine blade used therefor and manufacturing method for gas turbine blade |
US5296308A (en) * | 1992-08-10 | 1994-03-22 | Howmet Corporation | Investment casting using core with integral wall thickness control means |
FR2714858B1 (en) * | 1994-01-12 | 1996-02-09 | Snecma | Method for manufacturing a shell mold made of ceramic material for a lost model foundry. |
DE19539770A1 (en) * | 1995-06-20 | 1997-01-02 | Abb Research Ltd | Process for producing a directionally solidified casting and device for carrying out this process |
DE19726111C1 (en) * | 1997-06-20 | 1998-11-12 | Mtu Muenchen Gmbh | Process for the production of a turbomachine blade by casting |
EP0894558A1 (en) * | 1997-07-29 | 1999-02-03 | Siemens Aktiengesellschaft | Turbine blade and method of fabrication of a turbine blade |
-
2000
- 2000-08-07 DE DE10038453A patent/DE10038453A1/en not_active Withdrawn
-
2001
- 2001-06-30 EP EP01115998A patent/EP1193006B1/en not_active Expired - Lifetime
- 2001-06-30 DE DE50107262T patent/DE50107262D1/en not_active Expired - Lifetime
- 2001-08-06 US US09/921,587 patent/US6435256B1/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040133915A1 (en) * | 2002-11-08 | 2004-07-08 | Moody William H. | System and method for controlling access to media libraries |
WO2018156255A1 (en) * | 2017-02-22 | 2018-08-30 | General Electric Company | Method of manufacturing turbine airfoil with open tip casting and tip component thereof |
US10610933B2 (en) | 2017-02-22 | 2020-04-07 | General Electric Company | Method of manufacturing turbine airfoil with open tip casting and tip component thereof |
US10625342B2 (en) | 2017-02-22 | 2020-04-21 | General Electric Company | Method of repairing turbine component |
US10702958B2 (en) | 2017-02-22 | 2020-07-07 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof using ceramic core with witness feature |
US10717130B2 (en) | 2017-02-22 | 2020-07-21 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof |
US11154956B2 (en) | 2017-02-22 | 2021-10-26 | General Electric Company | Method of repairing turbine component using ultra-thin plate |
US11179816B2 (en) | 2017-02-22 | 2021-11-23 | General Electric Company | Method of manufacturing turbine airfoil and tip component thereof using ceramic core with witness feature |
EP3549693A1 (en) * | 2018-04-05 | 2019-10-09 | United Technologies Corporation | Turbine blades and vanes for gas turbine engine |
Also Published As
Publication number | Publication date |
---|---|
DE10038453A1 (en) | 2002-02-21 |
EP1193006A2 (en) | 2002-04-03 |
US6435256B1 (en) | 2002-08-20 |
EP1193006B1 (en) | 2005-08-31 |
DE50107262D1 (en) | 2005-10-06 |
EP1193006A3 (en) | 2003-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6435256B1 (en) | Method for producing a cooled, lost-wax cast part | |
JP3919256B2 (en) | Method for producing directionally solidified castings and apparatus for carrying out this method | |
US20100200189A1 (en) | Method of fabricating turbine airfoils and tip structures therefor | |
EP2366476B1 (en) | Method for Fabricating Turbine Airfoils and Tip Structures Therefor | |
US20090165988A1 (en) | Turbine airfoil casting method | |
US5592984A (en) | Investment casting with improved filling | |
US20030234092A1 (en) | Directional solidification method and apparatus | |
US10226812B2 (en) | Additively manufactured core for use in casting an internal cooling circuit of a gas turbine engine component | |
US5743322A (en) | Method for forming an article extension by casting using a ceramic mold | |
US5778960A (en) | Method for providing an extension on an end of an article | |
EP1531020B1 (en) | Method for casting a directionally solidified article | |
JP5451463B2 (en) | Method for manufacturing turbine airfoil and tip structure thereof | |
US5673745A (en) | Method for forming an article extension by melting of an alloy preform in a ceramic mold | |
US4609029A (en) | Method of reducing casting time | |
US5904201A (en) | Solidification of an article extension from a melt using a ceramic mold | |
US20060162893A1 (en) | Method for the production of a casting mold | |
JPH10113763A (en) | Method for solidifying extending part of product from molten material by using integral mandrel and ceramic mold | |
US3771586A (en) | Apparatus for continuous casting of directionally solidified articles | |
US5673744A (en) | Method for forming an article extension by melting of a mandrel in a ceramic mold | |
EP0059550A2 (en) | Method of casting | |
US6257311B1 (en) | Horizontal directional solidification | |
US6263951B1 (en) | Horizontal rotating directional solidification | |
US4970125A (en) | Cantilevered integral airfoil casting and method | |
CA2696274A1 (en) | Method for fabricating turbine airfoils and tip structures therefor | |
EP3581293A1 (en) | Method for casting cooling holes for an internal cooling circuit of a gas turbine engine component |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALSTOM POWER N.V., NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ANDERSON, GORDON;MARX, PETER;NAIK, SHAILENDRA;REEL/FRAME:012197/0751 Effective date: 20010806 |
|
AS | Assignment |
Owner name: ALSTOM (SWITZERLAND) LTD, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALSTOM POWER N.V.;REEL/FRAME:013021/0733 Effective date: 20020528 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: ALSTOM TECHNOLOGY LTD, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALSTOM (SWITZERLAND) LTD;REEL/FRAME:014770/0783 Effective date: 20031101 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: GENERAL ELECTRIC TECHNOLOGY GMBH, SWITZERLAND Free format text: CHANGE OF NAME;ASSIGNOR:ALSTOM TECHNOLOGY LTD;REEL/FRAME:038216/0193 Effective date: 20151102 |
|
AS | Assignment |
Owner name: ANSALDO ENERGIA IP UK LIMITED, GREAT BRITAIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GENERAL ELECTRIC TECHNOLOGY GMBH;REEL/FRAME:041731/0626 Effective date: 20170109 |