[특허]Method of forming concavities in the surface of a metal component, and related processes and articles

[미국특허] Method of forming concavities in the surface of a metal component, and related processes and articles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22C-009/00
출원번호	US-0841366 (2004-05-06)
등록번호	US-7302990 (2007-12-04)
발명자 / 주소	Bunker,Ronald Scott Hardwicke,Canan Uslu Lee,Ching Pang
출원인 / 주소	General Electric Company
인용정보	피인용 횟수 : 41 인용 특허 : 24

초록 ▼

A method of forming at least one concavity of a selected size and shape within a surface of an internal passageway of a metallic component comprises: depositing a ceramic-based material by a direct-write technique onto a ceramic core which is suitable for forming the internal passageway during a casting process to form the metallic component, wherein the ceramic-based material is deposited as a positive feature; heat-treating the deposited ceramic-based material; forming the metallic component by a casting process in which the ceramic core is incorporated into the casting, in a position selected as a desired position for the internal passageway; and then removing the ceramic core from the metal component after the casting process is complete, thereby forming the internal passageway, with the concavity contained within the surface of the passageway, said concavity formed by removal of the positive feature of the ceramic-based material.

대표청구항 ▼

What is claimed is: 1. A method of forming at least one concavity of a selected size and shape within a surface of an internal passageway of a metallic component, comprising the following steps: (a) depositing a ceramic-based material by a direct-write technique onto a ceramic core which is suitable for forming the internal passageway during a casting process to form the metallic component, wherein the ceramic-based material is deposited as a positive feature in a shape which, as cured, is inverse to the shape of the concavity; (b) heat-treating the ceramic-based material deposited in step (a); (c) forming the metallic component by a casting process in which the ceramic core is incorporated into the casting, in a position selected as a desired position for the internal passageway; and then (d) removing the ceramic core from the metal component after the casting process is complete, thereby forming the internal passageway, with the concavity contained within the surface of the passageway, said concavity formed by removal of the positive feature of the ceramic-based material. 2. The method of claim 1, wherein the direct-write technique is selected from the group consisting of thermal spray, laser CVD, ink jet, laser particle guidance, matrix assisted pulsed laser evaporation (MAPLE), pen dispensing techniques, and combinations of any of the foregoing. 3. A method according to claim 1 for forming a pattern of concavities, corresponding to a pattern of ceramic-based material deposited as positive features in step (a). 4. The method of claim 3, wherein the positive features are in a shape selected from the group consisting of diamonds, cones, hemispheres, hemispherical sections, circular pins, elongate hexahedrons, elongate semi-cylinders, and combinations thereof. 5. The method of claim 1, wherein step (c) is carried out by an investment casting process. 6. The method of claim 1, wherein the ceramic-based material deposited in step (a) is heat-treated in step (b) under thermal conditions sufficient to sinter the material and bond it securely to the ceramic core. 7. The method of claim 1, wherein the ceramic core is in a green state during the deposition of the ceramic-based material in step (a). 8. The method of claim 7, wherein the ceramic core is heat-treated during step (b), with the ceramic-based material deposited thereon, under sintering conditions. 9. The method of claim 1, wherein the heat treating of step (b) occurs during at least a portion of the depositing of step (a).

이 특허에 인용된 특허 (24) 인용/피인용 타임라인 분석

Fosaaen, Ken Ervin; Haaland, Rodney S., Ceramic casting cores with controlled surface texture.
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Sangeeta D. ; Szala Lawrence Edward ; Woodruff David Winfield ; Nagaraj Bangalore Aswatha ; McAtee Daniel Scott,IEX ; Spiro Clifford Lawrence, Coating composition for metal-based substrates, and related processes.
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Bunker, Ronald Scott; Wei, Bin, Cooling passages and methods of fabrication.
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Huseby ; Irvin C. ; Klug ; Frederic J., Core and mold materials and directional solidification of advanced superalloy materials.
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Hampden-Smith, Mark J.; Kodas, Toivo T.; Atanassov, Plamen; Atanassova, Paolina; Kunze, Klaus; Napolitano, Paul; Dericotte, David, Electrocatalyst powders, methods for producing powders and devices fabricated from same.
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Grobman Warren D. (202 Drew La. Carmel NY 12512) Kraus ; deceased Charles J. (28 Somerset Dr. late of Chatham MA) Kraus ; executrix by Paula A. (28 Somerset Dr. Chatham MA 02633) Wu Leon L. (Dogwood , Electronics system with direct write engineering change capability.
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McGill, R. Andrew; Chrisey, Douglas B.; Pique, Alberto, Fabrication of conductive/non-conductive nanocomposites by laser evaporation.
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Bunker, Ronald Scott; Wetzel, Todd Garrett; Jarczynski, Emil Donald, Generator stator cooling design with concavity surfaces.
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Lau, Yuk-Chiu; Ghasripoor, Farshad; Fusaro, Jr., Robert Anthony; Chupp, Raymond Edward; Baldwin, Donald Joseph; Hardwicke, Canan Uslu, High temperature abradable coatings.
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Lee Ching-Pang (Cincinnati OH), Internal cooling of turbine airfoil wall using mesh cooling hole arrangement.
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Slack, John D., Investment casting.
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Sangeeta, D.; Farr, Howard John, Metal slurry coatings on substrates, and related articles.
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Sampath, Sanjay; Herman, Herbert; Greenlaw, Robert, Method and apparatus for fine feature spray deposition.
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Hasz, Wayne Charles; Venkataramani, Venkat S.; Lee, Ching-Pang, Method for forming a channel on the surface of a metal substrate.
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Abuaf, Nesim; Hasz, Wayne Charles; Lee, Ching-Pang; Johnson, Robert Alan; Buck, Frederick Alan, Method for forming a turbine engine component having enhanced heat transfer characteristics.
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Greskovich Charles D. (Schenectady NY) Borom Marcus P. (Schenectady NY), Method for rapid removal of cores made of b2O₃ from directionall.
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O\Connor Kurt F. (Carmel IN), Method of making a core/pattern combination for producing a gas-turbine blade or component.
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Frank Gregory R. (Muskegon MI), Method of making ceramic cores.
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McGill Robert Andrew ; Chrisey Douglas Brian, Method of producing a film coating by matrix assisted pulsed laser deposition.
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Baldwin Mark W. (Cedar Falls IA) Waschek Arvid G. (Cedar Falls IA) Molian P. A. (Ames IA), Methods using lasers to produce deposition of diamond thin films on substrates.
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Keicher David M. ; Miller W. Doyle, Multiple beams and nozzles to increase deposition rate.
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Renn, Michael J., Particle guidance system.
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O'Connor Kurt Francis ; Hoff James Paul ; Frasier Donald James ; Peeler Ralph Edward ; Mueller-Largent Heidi ; Trees Floyd Freeman ; Whetstone James Rodney ; Lane John Henry ; Jeffries Ralph Edward, Single-cast, high-temperature, thin wall structures.
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Hasz, Wayne Charles; Abuaf, Nesim; Johnson, Robert Alan; Lee, Ching-Pang, Turbine engine component having enhanced heat transfer characteristics and method for forming same.
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Bonini, Eric Richard; Bunker, Ronald Scott, Backstrike protection during machining of cooling features.
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[미국특허] Method of forming concavities in the surface of a metal component, and related processes and articles 원문보기

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[미국특허] Method of forming concavities in the surface of a metal component, and related processes and articles 원문보기

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