Electrospark deposition process and system for repair of gas turbine
AssigneeGeneral Electric Company
InventorsDechao Lin, John Gregory Obeirne, David Vincent Bucci, Srikanth Chandrudu Kottilingam, Yan Cui
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Abstract
A system and method for repairing a metal substrate includes an electrospark device and an electrode removably supported in the electrode holder. The electrospark device applies a coating of a material when placed into contact with the metal substrate. A cooling device to lowers the temperature of shielding gas flow below an ambient temperature. A conduit is arranged to direct a flow of the shielding gas to the interface of the electrode and the substrate to cool the area of the substrate receiving the coating.
Claims11
A method of repairing a metal substrate comprising:
- providing a substrate;
- providing an electrospark deposition device, the electrospark deposition device configured to hold a consumable electrode with adjustable rotary speed;
- providing a shielding gas;
- cooling the shielding gas to lower the temperature of the gas below an ambient temperature;
- establishing a continuous spark between the electrode and the substrate;
- directing a flow of the shielding gas to the interface of the electrode, the substrate and the continuous spark;
- and
- continuously depositing an alloyed coating until a desired coating thickness is obtained:
- wherein the flow of the shielding gas cools the consumable electrode and the substrate.
Dependencies are inferred from the claim text.