CPC B23K 35/368 (2013.01) [B23K 35/0266 (2013.01); B23K 35/3053 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01)] | 14 Claims |
1. A flux-cored wire for straight polarity gas-shielded arc welding,
the flux-cored wire comprising a flux comprising a fluoride powder and a metal powder,
wherein the fluoride powder comprises BaF2 and at least one selected from the group consisting of SrF2, AlF3, and CaF2,
wherein contents of the BaF2, the SrF2, the AlF3, and the CaF2 satisfy, in terms of mass % relative to a total mass of the wire,
BaF2: 1.0% to 4.5%,
SrF2: 2.0% or less,
CaF2: 0.45% or less, and
AlF3: 0.70% or less,
wherein at least one of a metal element constituting the fluoride powder and a metal element constituting the metal powder is a strong deoxidizing metal element having at least one standard Gibbs energy of formation of −200 to −150 kcal/molO2 at 1500° C. to 1600° C. in an Ellingham diagram of an oxide of the strong deoxidizing metal element, and
wherein contents of an oxide and a carbonate in the flux satisfy, in terms of mass % relative to the total mass of the wire,
oxide: 0.5% or less, and
carbonate: 0.5% or less.
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