AGGLOMERATED FLUX FOR WELDING AND SURFACING WITH STAINLESS STEELS Russian patent published in 2019 - IPC B23K35/362 

FIELD: chemistry.

SUBSTANCE: invention relates to production of ceramic welding flux and can be used for welding and surfacing with stainless steel tape during production, in particular, of equipment for oil and gas processing, systems of hydrocarbons transportation. Agglomerated flux contains components in the following ratio, wt. %: SiO₂ 28–33; CaO 6–8; MgO 27–32; Al₂O₃ 13–18; CaF₂ 8–12; Cr - not less than 3. Chromium source used is chromite sand, having the following chemical composition, wt. %: Cr₂O₃ 46.80; Fe₂O₃ 28.90; Al₂O₃ 14.60; MgO 9.59; SiO₂ 0.36; CaO 0.05.

EFFECT: flux possesses high welding-process properties, provides increased resistance of metal of welds and welds to intercrystalline corrosion, considerable reduction of effect of embrittlement of weld metal and build-up welding, and as a result, increased quality and service life of welded and melted seam in wide range of temperatures.

1 cl, 8 dwg, 2 tbl