ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Galvanized steel sheets with a lap joint were welded by a laser-arc hybrid process. Thehybrid system consisted of 2kW LD or YAG laser oscillator and frequency-modulated DC pulsedMAG welding machine. In this experiment, the arc traveled on the specimens, following the laserbeam 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 theconventional MAG welding. Observations from a high-speed digital video-camera suggested thatthe zinc and iron vapors induced by laser beam irradiation stabilized the arc plasma. Effects of theincidence angle between a welding head and a specimen on the weld bead formations were alsodiscussed. As a result, the welding speed of 2.0 m/min was achieved at 1.0 mm of gap lengthcondition when the incidence angle was 50 degree
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.580-582.355.pdf
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