SURFACING METHOD Russian patent published in 2014 - IPC B23K9/04 

FIELD: metallurgy.

SUBSTANCE: electrodes of the same cross section are fed to a melting zone simultaneously at the same speeds parallel to each other. In front of a welding head in the surfacing direction there supplied is flux with formation of a layer with height H₁, which makes it possible to perform surfacing in an electroslag mode. Behind the welding head there supplied is flux with formation of a layer with height H₂ to protect a welding bath. Ratio of the above layers is chosen within H₂/H₁=0.4÷0.8. Distance between electrodes at their supply to the melting zone is controlled within 4.0 to 30 mm.

EFFECT: improvement of quality of a surfaced layer due to reducing the part of participation of parent metal in the surfaced metal, improving integrity of surfacing metal, reducing lack of fusion and undercuts; it contributes to a more favourable thermal surfacing cycle reducing probable formation of hardening structures and as a result possible defects.

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