Flux-cored wire and method of manufacturing welded joint
AssigneeNippon Steel Corporation
InventorsHajime MATSUO, Takahiro KAMO
Life of this patent
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Abstract
A flux-cored wire including a steel sheath and a flux, in which a chemical composition of the steel sheath includes C: from 0% to 0.650%, Si: from 0.03% to 0.50%, Mn: from 3.1% to 30.0%, P: from 0% to 0.050%, S: from 0% to 0.050%, Cu: from 0% to 5.0%, Ni: from 1.0% to 30.0%, Cr: from 0% to 10.0%, Mo: from 0% to 10.0%, Nb: from 0% to 1.0%, V: from 0% to 1.0%, Co: from 0% to 1.0%, Pb: from 0% to 1.0%, Sn: from 0% to 1.0%, Al: from 0% to 0.10%, Ti: from 0% to 0.10%, B: from 0% to 0.1000%, N: from 0% to 0.500%, balance: Fe and impurities, Mn+Ni≥5.0%, Mn+Ni+Cr≥15.0% or more, and a fraction of fcc in the steel sheath is 70% or more.
Claims13
A flux-cored wire for welding, comprising:
- a steel sheath;
- and
- a flux filled in the steel sheath,
- wherein a chemical composition of the steel sheath consists of, by mass % with respect to a total mass of the steel sheath:
- C:
- from 0% to 0.650%,
- Si:
- from 0.03% to 0.50%,
- Mn:
- from 3.1% to 30.0%,
- P:
- from 0% to 0.050%,
- S:
- from 0% to 0.050%,
- Cu:
- from 0% to 5.0%,
- Ni:
- from 1.0% to 30.0%,
- Cr:
- from 0% to 10.0%,
- Mo:
- from 0% to 10.0%,
- Nb:
- from 0% to 1.0%,
- V:
- from 0% to 1.0%,
- Co:
- from 0% to 1.0%,
- Pb:
- from 0% to 1.0%,
- Sn:
- from 0% to 1.0%,
- Al:
- from 0% to 0.10%,
- Ti:
- from 0% to 0.10%,
- B:
- from 0% to 0.1000%,
- N:
- from 0% to 0.500%,
- O:
- from 0% to 0.0050%, and
- balance:
- Fe and impurities,
- wherein:
- a total (Mn+Ni) of a content of the Mn and a content of the Ni is 5.0% or more,
- a total (Mn+Ni+Cr) of the content of the Mn, the content of the Ni, and a content of the Cr is 15.0% or more, and
- a fraction of fcc in the steel sheath as determined by a magnetic induction method is 70% or more.
Dependencies are inferred from the claim text.