Laser-Arc Hybrid Welding Process of Galvanized Steel Sheets

Abstract:

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Galvanized steel sheets with a lap joint were welded by a laser-arc hybrid process. The hybrid system consisted of 2kW LD or YAG laser oscillator and frequency-modulated DC pulsed MAG welding machine. In this experiment, the arc traveled on the specimens, following the laser beam with the interval of 2 mm. The results showed that the hybrid process had some advantages, such as deep penetration depth, high welding speed and high gap-tolerance, in comparison with the conventional MAG welding. Observations from a high-speed digital video-camera suggested that the zinc and iron vapors induced by laser beam irradiation stabilized the arc plasma. Effects of the incidence angle between a welding head and a specimen on the weld bead formations were also discussed. As a result, the welding speed of 2.0 m/min was achieved at 1.0 mm of gap length condition when the incidence angle was 50 degree.

Info:

Periodical:

Materials Science Forum (Volumes 580-582)

Edited by:

Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na

Pages:

355-358

DOI:

10.4028/www.scientific.net/MSF.580-582.355

Citation:

S. Matsusaka et al., "Laser-Arc Hybrid Welding Process of Galvanized Steel Sheets", Materials Science Forum, Vols. 580-582, pp. 355-358, 2008

Online since:

June 2008

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Price:

$35.00

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