Flux-cored welding wire for carbon steel and process for arc welding

Patent metadata

Field	Value
Publication number	US-9102013-B2
Application number	US-201213693331-A
Country	US
Kind code	B2
Filing date	Dec 4, 2012
Priority date	Dec 27, 2011
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

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 [S f ]>([S h ]+0.010), where [S f ] represents the S content (%) of the flux, and [S h ] represents the S content (%) of the sheath.

First claim

What is claimed is:

1. A flux-cored welding wire comprising:
a flux having a S content of 0.060% to 0.350% by mass; and
a sheath comprising carbon steel and filled with the flux, a content of the flux in the flux-cored welding wire being 10.0% to 30.0% by mass,
the flux-cored welding wire comprising, based on a total mass of the flux-cored welding wire:
0.02% to 0.15% by mass C;
0.30% to 1.50% by mass Si;
0.70% to 2.30% by mass Mn;
0.010% to 0.100% by mass S;
0.01% t…

Assignees

• Kobe Steel Ltd
• Kobe Steel Inc

Inventors

• Kasai Ryu
• Suzuki Reiichi

Classifications

• B23K35/362

  Operations & Transport · mapped topic

• B23K35/0266 Primary

  Operations & Transport · mapped topic

• B23K35/22 Primary

  Operations & Transport · mapped topic

• B23K35/383

  Operations & Transport · mapped topic

• C22C38/04

  Chemistry & Metallurgy · mapped topic