CO laser deep-penetration welding: a comparative study to CO2 laser welding

Martin Schellhorn; Hartwig von Buelow

doi:10.1117/12.204988

31 March 1995 CO laser deep-penetration welding: a comparative study to CO2 laser welding

Martin Schellhorn, Hartwig von Buelow

Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204988
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

Abstract

An unstable resonator (M equals 2) has been applied to reduce the beam divergence of a gasdynamically cooled supersonic CO laser operating at 105 K in a semiclosed gas cycle. A 4.7 kW laser beam with a total divergence of 2.5 mrad is obtained with an efficiency of 9.4%. The results of welding experiments are compared with those using a CO₂ laser. The weld depth obtained with the CO₂ laser are drastically reduced using Argon as assist gas; whereas the results with the CO laser are independent of the assist gas because of the lower plasma absorption coefficient for the shorter CO laser wavelength. The beam quality of the CO laser is strongly influenced by water vapor absorption in the beam delivery system.

Citation Download Citation

Martin Schellhorn and Hartwig von Buelow "CO laser deep-penetration welding: a comparative study to CO2 laser welding", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204988

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