Hybrid welding repair of gas turbine superalloy components

Details Hybrid welding repair of gas turbine superalloy components Hybrid welding repair of gas turbine superalloy components

B - Operations, Transporting

23

P

B23P 6/00 (2006.01) B23K 26/20 (2006.01) C23C 14/34 (2006.01) F01D 5/12 (2006.01)

Patent

CA 2595773

Methods are provided for repairing a degraded section of a turbine blade (100), the turbine blade (100) comprising a base material. In one embodiment, and by way of example only, the method includes the step of electro-spark depositing (408) a first material on the turbine blade degraded section to form an intermediate layer thereon, the first material comprising a material that is substantially similar to the base material. Next, a second material is laser welded (310) onto the intermediate layer to form a repaired section. This invention combines the low-heat input of electro- spark deposition with the high welding quality and high deposition rate of laser powder fusion welding.

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