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公开(公告)号：CA2588441A1
公开(公告)日：2007-11-24
申请号：CA2588441
申请日：2007-05-10
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KWIATKOWSKI ABRILES BETH , PIETRUSKA NORMAN , HYDE JOHN H
Abstract: A nickel base repair alloy comprises a blend of about 40 to 60 wt% of a first nickel based braze alloy containing boron, about 15 to 35 wt% of a first nickel based filler material, and the remainder consisting of a blend of a second nickel based filler material and a low melting eutectic braze nickel based alloy.
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公开(公告)号：CA2353374A1
公开(公告)日：2002-02-28
申请号：CA2353374
申请日：2001-07-23
Applicant: UNITED TECHNOLOGIES CORP
Inventor： KWIATKOWSKI ABRILES BETH , RUTZ DAVID A , MANIS BRYAN W
Abstract: The present invention relates to a self cleaning braze paste which is used in the repair of gas turbine engines. The braze paste comprises lithium fluoride in an amount sufficient to act as a flux which allows the braze material to flow into a crack or void in a part to be repaired up to an amount where there is no residual lithium or fluoride in the crack or void, preferably up to about 20% by volume, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy and a cobalt braze alloy. In a preferred embodiment, the lithium fluoride is present in an amount from about loo to-about 15% by volume. The braze material of the present invention may be applied in a paste form or, alternatively, in a paint or tape form. A method for cleaning and repairing a braze joint is also disclosed. The method broadly comprises the steps of forming a braze material containing lithium fluoride in the above mentioned range, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy or a cobalt braze alloy, applying the braze material to the braze joint, and heating the braze material to a temperature in the range of from about a temperature sufficient to cause the lithium fluoride to volatize up to about 2300ÀFfor a time period from about 1.0 minute to about 30.0 minutes.
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公开(公告)号：CA2353374C
公开(公告)日：2004-09-28
申请号：CA2353374
申请日：2001-07-23
Applicant: UNITED TECHNOLOGIES CORP
Inventor： MANIS BRYAN W , KWIATKOWSKI ABRILES BETH , RUTZ DAVID A
Abstract: The present invention relates to a self cleaning braze paste which is used in the repair of gas turbine engines. The braze paste comprises lithium fluoride in an amount sufficient to act as a flux which allows the braze material to flow into a crack or void in a part to be repaired up to an amount where there is no residual lithium or fluoride in the crack or void, preferably up to about 20% by volume, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy and a cobalt braze alloy. In a preferred embodiment, the lithium fluoride is present in an amount from about loo to-about 15% by volume. The braze material of the present invention may be applied in a paste form or, alternatively, in a paint or tape form. A method for cleaning and repairing a braze joint is also disclosed. The method broadly comprises the steps of forming a braze material containing lithium fluoride in the above mentioned range, a gel binder in an amount up to about 15% by volume, and the balance comprising at least one of a nickel braze alloy or a cobalt braze alloy, applying the braze material to the braze joint, and heating the braze material to a temperature in the range of from about a temperature sufficient to cause the lithium fluoride to volatize up to about 2300ÀFfor a time period from about 1.0 minute to about 30.0 minutes.
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