WELDING WIRE FROM STAINLESS STEEL WITH FLUX CORE FOR WELDING STEEL SHEET AND METHOD OF ARC WELDING OF ZINC-COATED STEEL SHEET USING SAID WELDING WIRE

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to welding wire from stainless steel with flux core for welding zinc-coated steel sheet. Said wire comprises shell from stainless steel filled with flux. Total content of elements introduced in the form of metals or alloys into said shell and said flux, relative to total weight of welding wire, makes, in wt %: C - 0.01-0.05, Si - 0.1-1.5, Mn - 0.5-3.0, Ni - 7.0-10.0, Cr - 26.0-30.0, Fe and unavoidable impurities making the rest. Magnitude F defined the formula given below makes 30-50, F = 3×[Cr%] + 4.5×[Si%]-2.8×[Ni%]-84×[C%]-1.4[Mn%]-19.8 , where [Cr%], [Si%], [Ni%], [C%] and [Mn%], respectively, define total content of Cr, Si, Ni, C and Mn in wire shell and welding wire relative to total weight of the wire. Note here that said flux comprises the following slag-forming materials in wt % with respect to wire total weight: TiO₂ - 3.8-6,8%, SiO₂ - 1.8-3.2%, ZrO₂ - 1.3% or smaller, including 0%, Al₂O₃ - 0.5% or less, including 0% and total content of said slag-forming materials makes 7.5-10.5%, note here that content of TiO₂ makes 50-65% with respect to total weight of slag-forming materials.;EFFECT: ruled out cracking of weld seam, higher hardness and elasticity.;5 cl, 6 dwg, 5 tbl, 2 ex