| 摘要 |
PURPOSE: An improved braze material which may be used to clean and repair engine parts, a quicker, more reliable method of cleaning gas turbine engine parts required to support brazements, and a more reliable method for repairing gas turbine engine parts are provided. CONSTITUTION: The braze material for cleaning and repairing cracks and voids in a metallic component comprises lithium fluoride in an amount from that sufficient to act as a flux for allowing the braze material to flow into a crack or void to be repaired up to an amount where there is no residual lithium or fluoride in the crack or void, 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. The method for cleaning and repairing a braze joint comprises the steps of forming a braze material containing lithium fluoride in an amount from that effective to act as a flux which allows the braze material to flow into said braze joint to be repaired up to an amount where there is no residual lithium or fluoride in said braze joint, 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; applying said material to said braze joint; and heating said material to a temperature in the range of from a temperature sufficient to cause said lithium fluoride to volatize up to about 2300 deg.F for a time period from about 1 minute to about 30 minutes.
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