MELT FLUX FOR POWERED WELDING OF LOW ALLOY STEEL Russian patent published in 2007 - IPC B23K35/362 

FIELD: production of welding flux used for powered welding of modern vessels of nuclear reactors and other high pressure vessel in power machine engineering and petro-chemistry.

SUBSTANCE: melt flux contains next relation of ingredients, mass %: SiO₂, 20 - 27; CaO, 12 - 18; Al₂ O₃, 13 - 18; CaF, 2O - 33; MnO, 7 - 13; TiO₂, 3 - 10; K₂ O, 1 - 5; Fe₂O₃ as impurities no more than 1.5; S, no more than 0.01; P, no more than 0.01; while 0.15 < TiO₂/SiO₂ < 0.40. Flux provides enhanced reliability and resource of made equipment due to lowered temperature of brittle-viscous transition (Tko) of seam metal. Flux allows perform welding at rate higher than 28m/h.

EFFECT: lowered labor consumption of process for making welded structures.

2 cl, 4 tbl