AGGLOMERATED FLUX Russian patent published in 2007 - IPC B23K35/362 

FIELD: automatic welding of low-alloy cold-resistant steels of standard, increased and high strength in general modes, forced modes and increased-rate modes of welding by means of low alloy wires.

SUBSTANCE: flux includes, mass %: synthetic corundum, 28 - 33; fired magnesite, 10 - 16; rutile concentrate, 4.0 - 8.0; iron ore concentrate, 0.4 - 0.5; modifying agent, 45 - 50; metallic manganese, 2.0 - 3.0; metallic aluminum, 0.7 -1.0; ferrotitanium, 1.5 - 2.0; ferroboron, 0.2 - 0.7; sodium-potassium silicate, 7.7 - 8.9. Relation of ferrotitanium content to ferroboron content is in range 4 - 10. Total content of manganese and aluminum, no less than 2.8 mass %. Modifying agent is prepared by melting CaO, Al₂O₃, CaF₂, MnO and SiO₂ at relation 1.0:1.5: 1.5:1.0:2.0 respectively.

EFFECT: enhanced welding properties of agglomerated flux due to reduced viscosity of slag, enlarged manufacturing possibility of flux at high-speed welding due to favorable contour of welded seam, namely smooth joining of seam with base metal while keeping cold resistance of welded joint at temperature till -60°C.

2 cl, 5 tbl