Hybrid welding method to improve butt weld quality

摘要

The present invention relates to a hybrid welding method for improving the quality of a butt weld.;In the hybrid welding method of the present invention, the laser and the arc are the preceding and the following processes, respectively, while the distance S between the laser and the arc torch is 6 mm or less, and the angle between the test plate and the arc torch is 50 ^o or more, Perform welding while maintaining the auxiliary gas flow rate at 10 ~ 30ℓ / min, and control the value of specific relation between laser and arc output and welding speed to be within 70 ~ 120% of the thickness of steel to be welded. There is this.;In the hybrid welding method of the present invention, since the arc serves as a trailing process, the weld is heat-treated after the welding by the preceding laser, thereby minimizing the increase in hardness of the final weld, improving the gap tolerance of the weld, reducing porosity, and spatter. This has the effect of reducing the amount of data generated.;Hybrid welding, butt welds, preprocess, arc, arc torch, laser