Flux-cored welding wire for carbon steel and process for arc welding
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United States of America Patent
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Aug 11, 2015
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Jun 27, 2013
app pub date -
Dec 4, 2012
filing date -
Dec 27, 2011
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Abstract
Arc welding is performed with a flux-cored welding wire using pure Ar shielding gas with a pulsed current having a peak current of 340 to 540 A and a peak current time of 0.7 to 2.5 ms as a welding current, in which the wire includes a carbon-steel sheath and contains, on a mass percent basis, 0.02% to 0.15% C, 0.30% to 1.50% Si, 0.70% to 2.30% Mn, 0.010% to 0.100% S, 0.01% to 0.18% Ti, 0.030% or less P, and 0.15% or less Cr, with respect to the total mass of the wire, in which the wire has a flux content of 10.0% to 30.0%, the flux has a S content of 0.030% to 0.600%, and the wire satisfies [Sf]>([Sh]+0.010), where [Sf] represents the S content (%) of the flux, and [Sh] represents the S content (%) of the sheath.
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