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Welding of aluminium with CO2-laser

: Behler, K.; Beyer, E.; Schäfer, R.

Quenzer, A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
High power CO2 laser systems and applications
Bellingham/Wash.: SPIE, 1989 (Proceedings of SPIE 1020)
ISBN: 0-8194-0055-6
European Congress on Optics (ECO) <1, 1988, Hamburg>
Conference Paper
Fraunhofer ILT ()
aluminium alloy; assist gas; focusing; optical property; welding Al 99,5; welding steel component

In industrial production, CO2-lasers have been used in welding steel components for several years. The use of CO2-lasers in deep penetration welding of aluminium alloys was hindered up to now due to the properties of these materials. Due to low absorption, high thermal conductivity and low ionisation energy respectively, the width of variating the process parameters is reduced considerably compared to the welding of steel. Experimental investigations in welding AL 99,5 and aluminium alloys show that it is possible to reach welding results with acceptable and reproducible quality. The presented investigations are an attempt to analyse the difficulties in CO2-laser welding of aluminium systematically.