It has been known for many years that the combination of a laser beam and an
electric arc can produce welds with many of the technical advantages of those made using just
a laser, for example; deep penetration and low distortion. This process where both the laser
and arc act in the same melt pool (see figure 3) gives higher speeds, with even deeper
penetration and greater tolerance to fit-up compared to the laser alone. Hybrid laser-MIG
welding allows high completion rates in comparison with laser processes, with a decrease in
the necessary laser power and a clear improvement of the joining process reliability. Hybrid
welding is thus cheaper than laser welding and retains, or even improves the technical
benefits of laser welding
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