Influence of the surfacing process of laser-arc hybrid welding with self-shielded flux-cored wire on the bead appearance

This paper evaluated the weld appearance of laser-arc hybrid surfacing which used self-shielded flux-cored wire(414N-O) by the form factor of weld. The influence of surfacing parameters on bead appearance during laser-arc hybrid surfacing process was studied. The results indicated that the adding of laser significantly decreased the probability of drift of arc-work point, eliminated the pores produced in the long arc surfacing effectively, and degraded the arc effect on the workpiece surface. The laser-wire position and distance (DLA) exerted a decisive influence on the weld appearance. When the laser was placed in front of the welding wire, theDLAhad a prominent influence on the weld appearance and vice versa. The bead appearance could be improved whenDLAwas 0 or +2 mm. However, the bead appearance could be deteriorated whenDLAbecome -2 mm. The bead reinforcement was significantly affected by laser power, welding speed, welding current and welding voltage. And laser power, welding current and welding voltage presented a remarkable influence on the form factor of weld. But the influence of wire extension on both of the bead appearance and form factor of weld is less.