Electric heating – Metal heating – By arc
Patent
1988-06-20
1989-05-30
Albritton, C. L.
Electric heating
Metal heating
By arc
21912184, B23K 2600
Patent
active
048353574
ABSTRACT:
A method for the thermal welding of contiguous sheet metal elements comprising the steps of directing a defocussed laser beam at the joint formed therebetween so as to plasticize the areas thereof proximate thereto with a substantial portion of the energy thereof, and simultaneously feeding a powdered filler material into and about the joint so as to fully encompass the area of laser beam impingement thereupon, with a portion of the filler material being heated to a plastic state by the remaining portion of the beam's energy. The powdered filler material thus partially shields the sheets from the direct impingement of the beam's full energy thereupon, whereby the likelihood of sheet burn-through and/or excessive heat distortion is greatly reduced. The plasticized filler material thereafter attaches to the plasticized area proximate with the joint and builds thereupon a homogeneous weld seam characterized by excellent weld fusion and a high joint efficiency.
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Eboo, G. M., and Blake, A. G., "Laser Cladding of Gas Turbine Components", ASME Paper No. 86-GT-298, presented at the International Gas Turbine Conference and Exhibit, Dusseldorf, West Germany, Jun. 8-12, 1986.
Albritton C. L.
Lyon Lyman R.
Williams International Corporation
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