Multi-laser beam welding high strength superalloys

Details Multi-laser beam welding high strength superalloys Multi-laser beam welding high strength superalloys

2005-12-06

2005-12-06

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

By arc

C148S525000, C219S121630

Reexamination Certificate

active

06972390

ABSTRACT:
A method is provided for repairing degraded and/or eroded areas on gas turbine blades and vanes. The method is directed to turbine blades and vanes made of advanced superalloy materials with high elevated-temperature properties. The method uses multiple laser beams to perform steps of preheating the repair area, welding the repair area, and post-welding heating of the repaired area. The method uses an array of two or more lasers to perform the steps of heating, welding, and post-weld heat treatment in nearly simultaneous operation thereby dramatically reducing or eliminating the hot cracking associated with other welding methods used with superalloy materials. The method is further directed to cladding or material buildup of degraded turbine blades where the weld material is the same as the matrix or better superalloy materials.

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