Method and apparatus for Nd: YAG hardsurfacing
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United States of America Patent
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-
Mar 30, 1999
Issued Date -
N/A
app pub date -
Jul 25, 1997
filing date -
Nov 22, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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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