SUBMERGED ARC-WELDING METHOD WITH ADDITIONAL ADDITIVE Russian patent published in 2020 - IPC B23K9/18 

FIELD: metallurgy.

SUBSTANCE: invention can be used in production and installation of metal structures from alloyed steels by means of automatic submerged arc welding. In the cooling part of the welding bath, an additional alloying filler wire (AFW) is introduced to the bottom of the welding bath at a distance from the electrode axis equal to 1/3 of the length of the welding bath at a constant rate and a settling force of 2–10 MPa. AFW is heated. In the process of welding, the sedimentation force is controlled and automatically controlled by changing the temperature of the AFW at the point of its contact with the bottom of the welding bath by changing the distance between the axis of the electrode and the point of injection of the AFW in the control interval equal to 1/5 of the length of the weld pool.

EFFECT: invention ensures stability of adding additional hot additive by maintaining preset force of its deposition at bottom of welding bath.

4 cl, 1 dwg