Method of repair of turbines

Details Method of repair of turbines Method of repair of turbines

1991-06-07

1993-02-16

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

2940207, 2940213, 228119, B23P 1504

Patent

active

051859246

ABSTRACT:
A method of repairing stator blades in a turbine comprises the steps of making a pre-shaped insert of a material the same as or compatible with the material of the stator blade, the size of the insert is such that it forms a substantial part of the stator blade, the method including the step of removing a piece of material from the stator blade including the damaged part or part that it is required to modify and welding in the new insert. The insert is treated so that at least a part of it is hardened, the hardening may be diffusion alloying or plasma spray and the size of the insert is such that the weld line between the insert and the turbine blade is removed from the area of high wear making the insert larger than would apparently appear necessary, this enables substantial cut-outs to be made on each stator blade which in turn permits of much better access to the stator blades for securing the new insert and/or additional hardening steps such as plasma spray after the insert has been secured to the stator blade.

REFERENCES:
patent: 4141127 (1979-02-01), Cretella et al.
patent: 4832252 (1989-05-01), Fraser

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