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Salvaged castings and methods of salvaging castings with defective cast cooling bumps

United States Patent

July 30, 2002
View the Complete Patent at the US Patent & Trademark Office
Castings for gas turbine parts exposed on one side to a high-temperature fluid medium have cast-in bumps on an opposite cooling surface side to enhance heat transfer. Areas on the cooling surface having defectively cast bumps, i.e., missing or partially formed bumps during casting, are coated with a braze alloy and cooling enhancement material to salvage the part.
Johnson; Robert Alan (Simpsonville, SC), Schaeffer; Jon Conrad (Greenville, SC), Lee; Ching-Pang (Cincinnati, OH), Abuaf; Nesim (Lincoln City, OR), Hasz; Wayne Charles (Pownal, VT)
General Electric Company (Schenectady, NY)
09/ 737,089
December 14, 2000
This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.