Authors: Qin, G. L.; Lei, Z.; Lin, S. Y.

Source: Science and Technology of Welding & Joining, Volume 12, Number 1, January 2007 , pp. 79-86(8)

Publisher: Maney Publishing

Abstract:

Weld penetration depth, width, reinforcement and reinforcement to width ratio were defined as the factors to evaluate the weld shape. The effects of Nd:YAG laser + pulsed metal active gas (MAG) arc hybrid welding parameters on the weld shape were investigated with bead on plate tests. The results indicated that the laser energy mainly decides the weld penetration and the weld width depends on the arc for a given welding speed. The Nd:YAG laser has some effects on the hybrid weld appearance in varying of laser–arc distance and location of laser focus. The addition of laser energy in pulsed MAG arc welding can greatly increase its welding speed and the arc can improve the absorption of laser energy by workpiece. The test results also show that there is a matching relationship between the optimal laser–arc distance and the welding current for a given laser energy.

Keywords: HYBRID WELDING; WELDING PARAMETERS; LASER WELDING; PULSED MAG WELDING; WELD SHAPE

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174329306X147544

Publication date: 2007-01-01

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