Steel welded member
AssigneeNippon Steel Corporation
InventorsTakuya Mitsunobu, Keitaro Matsuda, Jun Maki, Takehiro Takahashi, Hiroshi Takebayashi
Life of this patent
Estimating the term…
Abstract
A steel welded member comprising a plurality of Zn-based plated steel materials, each having a Zn-based plating layer on a surface of a steel material, joined together through at least one spot weld, wherein the steel material contains, by mass %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 5.0%, the steel welded member includes, by area ratio, 20 to 80% of a Γ phase (Fe3 Zn10) and at least one oxide with a long axis of 0.5 μm or more in a region up to 0.5 mm from an end part of a pressure weld of the spot weld.
Claims4
A steel welded member comprising a plurality of Zn-based plated steel materials, each having a Zn-based plating layer on a surface of a steel material, joined together through at least one spot weld, wherein
- the steel material has a chemical composition comprising, by mass %,
- C:
- 0.05 to 0.40%,
- Si:
- 0.2 to 3.0%,
- Mn:
- 0.1 to 5.0%,
- sol. Al:
- 0 to less than 0.4000%,
- P:
- 0.0300% or less,
- S:
- 0.0300% or less,
- N:
- 0.0100% or less,
- B:
- 0 to 0.010%,
- Ti:
- 0 to 0.150%,
- Nb:
- 0 to 0.150%,
- V:
- 0 to 0.150%,
- Cr:
- 0 to 2.00%,
- Ni:
- 0 to 2.00%,
- Cu:
- 0 to 2.00%,
- Mo:
- 0 to 1.00%,
- W:
- 0 to 1.00%,
- Ca:
- 0 to 0.100%,
- Mg:
- 0 to 0.100%,
- Zr:
- 0 to 0.100%,
- Hf:
- 0 to 0.100%,
- REM:
- 0 to 0.100% and
- a balance of Fe and impurities, and
- the steel welded member comprises, by area ratio, 20 to 80% of a Γ phase (Fe3Zn10) and at least one oxide with a long axis of 0.5 μm or more in a region up to 0.5 mm from an end part of a pressure weld of the spot weld.
Dependencies are inferred from the claim text.