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Welding of steel with CO2-Laser of 20 kW.

Schweißen von Stahl mit einem CO2-Laser von 20 kW
 
: Funk, M.; Köhler, U.; Behler, K.; Beyer, E.

Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
High power lasers and laser machining technology
Bellingham/Wash., 1989 (Proceedings of SPIE 1132)
ISBN: 0-8194-0168-4
European Congress on Optics (ECO) <2, 1989, Paris>
Englisch
Konferenzbeitrag
Fraunhofer ILT ()
20 kW beam power; 20 kW Laserstrahlleistung; bead-on-plate welding; Blindnahtschweißung; cross-section; Helium; helium gas shielding; plasma suppresion; Plasmaunterdrückung; Querschnitt; reflectivity; Reflektion; Schutzgas; thermal conductivity; Wärmeleitfähigkeit

Abstract
Laser welding experiments of thick metal sheets with a thickness of up to 20 mm at high power levels up to 20 kW beam power are reported. Due to the high intensity of the laser beam exceeding 10 high 7 Wcm high minus 2, the effect of plasma suppression by helium gas shielding was investigated. Furthermore, the welding parameters were determined for a laser beam power range between 10 and 20 kW. The first results indicate that an extrapolation of the laser welding parameters which already had been observed when welding at lower power levels smaller than 10 kW, is not applicable for the 20 kW range. Moreover, the influence of the welding speed on the porosity of the welding seam in low carbon steels of 20 mm sample thickness was slightly different from results of thin sheet welding with a thickness of less than 10 mm.

: http://publica.fraunhofer.de/dokumente/PX-41440.html