Electrospark deposition process and system for repair of gas turbine

摘要

A system and method for repairing a metal substrate (22) includes an electrospark device (21) and an electrode (20) removably supported in the electrode holder. The electrospark device (21) applies a coating of a material when placed into contact with the metal substrate (22). A cooling device (26) to lowers the temperature of shielding gas (24) flow below an ambient temperature. A conduit (28) is arranged to direct a flow of the shielding gas (24) to the interface (30) of the electrode (20) and the substrate (22) to cool the area of the substrate (22) receiving the coating.