Influence of the Parameters of Arc Surfacing with an Additional Filler Wire on the Formation of a Deposited Wear-Resistant Fe–C–Cr–Nb–B + (TiC) Metal

The basic principles of deposited metal formation during arc surfacing with flux-cored wires, one of which is a filler wire, are considered. The influence of the filler wire feed rate on the weld bead formation is investigated. The limiting values of additional filler feed rate as a function of wire introduction site are determined. The influence of the filler wire on the stability indicators of the arc process is studied. In the arcing modes under study, a filler wire feed rate of up to 2.4 m/min is shown not to destabilize the surfacing process when the wire is fed along the front of the weld pool. However, when the filler wire is fed at the rear part of the weld pool, its feed rate cannot exceed 2.0 m/min. An increase in the feed rate is found to break the stability of the surfacing process.