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Laser-assisted plasma arc welding of stainless steel

 
: Mahrle, A.; Rose, S.; Schnick, M.; Beyer, E.; Füssel, U.

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Journal of laser applications : JLA 25 (2013), No.3, Art. 032006, 8 pp.
ISSN: 1042-346X
ISSN: 1938-1387
English
Journal Article
Fraunhofer IWS ()
fiber laser; hybrid welding; laser-assisted arc welding; plasma arc welding

Abstract
A plasma arc and a low-power/high beam quality laser beam were coaxially combined into one process in order to obtain a more efficient and stable arc for thin sheet welding applications. Theoretical discussion of interaction mechanisms between the laser beam and the plasma arc and results of bead-on-plate welding trials carried out on AISI 304 stainless steel will be presented. Measurements were made of electrical and geometrical arc properties with and without assistance from the laser beam. Additionally, the impact of the laser beam on the weld seam geometry was evaluated. The results showed that the use of the additional low-power laser beam is capable of producing significant process improvements in comparison to the individual plasma arc process alone with respect to arc stability and welding performance.

: http://publica.fraunhofer.de/documents/N-242047.html