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US 2004/0056079 A1Published application
Method of sealing a hollow cast member
AssigneeSiemens Westinghouse Power Corporation
InventorVasudevan Srinivasan
Life of this patent
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Abstract
A method of sealing an opening in a cast member that employs a green seal cap formed from the consolidation of a mixture of powdered metal and a binder under sufficient pressure to impart enough strength to the cap to maintain its shape during the blade manufacturing process. The green seal plate cap is inserted into the opening in the cast member and the cast member is subjected to iso-static pressing, which bonds the seal plate cap to the cast member and sinters the cap to form a solid seal.
Claims11
A method of sealing a hole in a surface of a hollow cast member comprising the steps of:
- forming a sealing plate having a circumferential shape that substantially conforms to the hole, from a mixture of metal powder and an organic binder, compacted to impart sufficient green strength to maintain the shape of the plate;
- placing the circumferential shape of the sealing plate within the hole to close the hole;
- and
- creating a metallurgical bond between the plate and the member by heating the member.
1 more element
Dependencies are inferred from the claim text.