Method of refurbishing turbine vane or blade components

Details Method of refurbishing turbine vane or blade components Method of refurbishing turbine vane or blade components

1976-11-26

1979-02-27

Lanham, C.W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29401A, 29402, 416213R, 416241R, 427 34, 427142, 427423, 427331, 228119, B23P 1502, B23P 704

Patent

active

041411277

ABSTRACT:
A method of refurbishing vane or blade components. Used turbine vanes or blades are cleaned, annealed and in some cases slotted adjacent their ends, after which any cooling passages (in the case of vanes) are welded closed and all cracks welded over, on both leading and trailing edges. The trailing edge, for a vane or blade component having a short chord, is built up by welding along its full length with an alloy wire, after which any slots that were cut adjacent the ends are closed, also by welding. Then the worn surfaces of the vane or blade are built-up by a plasma spray process, using a metal powder with added silica, to a thickness which can be as great as 30 to 40 thousandths of an inch. The built-up vane or blade is then sintered and thereafter surface finished to conform to the original contour of the component when new. Any cooling holes are finally recut, and the vane or blade polished as required and inspected.

REFERENCES:
patent: 1755321 (1930-04-01), Hendrickson
patent: 2120525 (1938-06-01), McKerihan
patent: 2494970 (1950-01-01), Shea
patent: 3015880 (1962-01-01), Stephenson
patent: 3564689 (1971-02-01), Hirtenlechner
patent: 3576065 (1971-04-01), Frazier

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