FIELD: metallurgy, namely metal welding, possibly butt welding of hot rolled steel strips designed for further cold rolling.
SUBSTANCE: method comprises steps of drawing together end edges of strips; welding them by passing electric current through them and upsetting them; determining value of welding current according to relation Iw = isp x V, where I w - welding current value, A; i sp - specific density of electric current equal to 0.52 -0.56 A/cub. mm; V - volume of melt metal of strip, cub. mm. Upsetting value after welding is determined according to relation Δ c = K x δ, where Δ c -upsetting value, mm; K - empiric coefficient equal to 1.45 - 1.75; δ - strip thickness, mm.
EFFECT: enhanced possibility for rolling welded joints due to optimal structure of metal in zone of welding joints.
1 ex
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