METHOD OF LASER-ARC WELDING Russian patent published in 2017 - IPC B23K26/348 B23K26/14 

FIELD: technological processes.

SUBSTANCE: method includes welding with simultaneous exposure of a laser beam and an arc of consumable electrode in the inert gas environment to a welding bath. The distance between the center of focused spot of laser radiation and the point of arc contact is 10-15 mm. The laser beam is tilted to the side opposite to movement direction of the edges at 20-25° angle relative of normal to the surface of edges to be welded, and the arc burner is tilted towards movement direction of the edges by 30-35° into the laser radiation zone, and protective gas is supplied to laser radiation zone and electrode zone. Protective gas is supplied to laser radiation zone and to electrode zone. In the electrode zone, the protective gas is fed in one direction to the arc electrode during welding.

EFFECT: improvement of weld quality due to reduction of weld defects, in particular, such as defects type of through holes, cavities, pores and slag inclusions by rectification of steam-gas channel during laser-arc welding process and, as a consequence, improvement of degassing conditions of the welding bath.

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