Method and apparatus for Nd: YAG hardsurfacing

Details Method and apparatus for Nd: YAG hardsurfacing Method and apparatus for Nd: YAG hardsurfacing

1997-07-25

1999-03-30

Mills, Gregory L.

Electric heating

Metal heating

By arc

21912164, 21912166, 427597, 148512, B23K 2608

Patent

active

058892540

ABSTRACT:
A method and apparatus are provided for hardsurface cladding a workpiece such as a tip shroud notch face of a turbine bucket configured for contact engagement with an adjacent tip shroud notch face. A continuous wave laser beam is generated in a Nd:YAG laser and directed on the notch face at a spot to provide heat thereat. A hardsurface cladding wire is dispensed at the spot under a shielding gas for being melted by the laser beam to form a molten cladding layer on the notch face. The laser beam and wire are traversed over the notch face to form a cladding layer over the entire notch face, which is cooled and solidified in a hardsurface cladding layer integrally bonded to the notch face.

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Superalloys II, xiii-xx; 3-4; 495-516; 579-580; 587-589; 601-603; (Chester T. Sims et al. eds., 1987).
Irisawa et al., "Surface Improvement for Inside Surface of Small Diameter Pipes by Laser Cladding Technique", Ishikawajima-Harima Heavy Industries Co., Ltd., Aug. 1991, pp. 1036-1044.

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