Method of refurbishing cast gas turbine engine components and re

Details Method of refurbishing cast gas turbine engine components and re Method of refurbishing cast gas turbine engine components and re

1988-01-13

1989-11-07

Kastler, S.

Metal treatment

Compositions

Heat treating

148903, 228119, C21D 109

Patent

active

048789534

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.

REFERENCES:
patent: 4050133 (1977-09-01), Cretella et al.
patent: 4098450 (1978-07-01), Keller et al.
patent: 4141127 (1979-02-01), Cretella et al.
patent: 4219592 (1980-08-01), Anderson et al.
patent: 4285459 (1981-08-01), Baladjanian et al.
patent: 4689463 (1987-08-01), Shubert
patent: 4705203 (1987-11-01), McComas et al.

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