METHODS AND APPARATUS FOR WELDING USING ELECTRODES WITH COAXIAL POWER SUPPLY Russian patent published in 2021 - IPC B23K9/173 B23K35/02 B23K35/368 

FIELD: welding.

SUBSTANCE: the welding electrode (100) is made in form of a metal cylinder shell (105) with a welding end and an inner cavity (110) which contains powdered filler materials (150) configured to move relative to the metal cylinder to the welding end of the electrode. Tools for feeding the powdered filling materials include carrier gas and allow moving said materials relative to the cylinder shell. The shell may be formed of pure metals or melts subject to extrusion and the filling materials fed through the inner cavity contain other components of the super-alloy composition. Feeding tools may additionally include mechanical assembly, e.g., screw type, or an acoustic system. The welding electrode may additionally contain flux covering (120).Resulting build-up reaches the desired super-alloy composition by a combination of cylinder materials and fed core materials.

EFFECT: invention may be used for forming by arc build-up welding of a desired composition of a super-alloy material.

23 cl, 3 dwg