Method of refurbishing cast gas turbine engine components and refurbished component
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United States of America Patent
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Nov 7, 1989
Grant Date -
N/A
app pub date -
Jan 13, 1988
filing date -
Jan 13, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The refurbishing process permits an overlay to be formed on a casting to repair cracks, distortions and the like as well as to build up undersized sections. During refurbishing, a plasma arc is established under an electric current of less than 30 amps to form a shallow pool of molten metal on a casting. Powdered metal is delivered slightly above the molten pool and, subsequently, the melted powder and molten pool solidify to an overlay having a high integrity, cast structure which is metallurgically bonded to the casting with minimal dilution.
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