FLUX-ADDITIVE Russian patent published in 2017 - IPC B23K35/362 

FIELD: metallurgy.

SUBSTANCE: flux additive is designed for mixing with fused fluxes and can be used for submerged arc welding of steels. The flux-additive contains components in the following ratio, wt %: strontium-barium carbonatite 1-15, sodium liquid glass 25-50, dust of electrostatic precipitators of aluminium production 35-74. The dust of electrostatic precipitators of aluminium production contains, wt %: Al₂O₃ 20-46.23; F 16-26.7; Na₂O 7.6-15; K₂O 0.4-6; CaO 0.6-2.3; SiO₂ 0.5-2.48; Fe₂O₃ 2.1-3.27; C_total 12.5-30.2; MnO 0.07-0.9; MgO 0.06-0.9; S 0.08-0.19; P 0.09-0.18.

EFFECT: improved mechanical properties of welds, in particular, impact strength at temperatures below zero due to reduction of the level of contamination with nonmetallic inclusions.

1 tbl