COMBINED BRAZE AND COATING METHOD FOR FABRICATION AND REPAIR OF MECHANICAL COMPONENTS
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United States of America Patent
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app pub date -
Jan 14, 2015
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Jan 14, 2015
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Abstract
A method disclosed herein involves disposing (125) a pre-sintered preform (50) onto a machined component surface (44) to form a pre-braze assembly. The pre-braze assembly is then heated (130) in order the melt the preform at a temperature less than a liquidus temperature of the component surface to form a multi-layer component (52) having a protective surface (56). The preform may be formed by sintering a first powder including a protective alloy and a second powder including a composition of the protective alloy that is supplemented with an additional element such that a solidus temperature of the second powder is lower than a solidus temperature of the first powder. The method allows a service run gas turbine ring segment (30) to be repaired without chemical stripping or welding.
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