Steel sheet
AssigneeNippon Steel Corporation
InventorsYasuaki Tanaka, Shohei Yabu, Hiroshi Shuto, Koutarou Hayashi, Takashi Yasutomi, Eisaku Sakurada
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Abstract
There is provided a steel sheet having a chemical composition comprising, in mass %, C: 0.05 to 0.25%, Si: 0.2 to 2.0%, Mn: 1.2 to 3.0%, P: 0.030% or less, S: 0.050% or less, Al: 0.01 to 0.55%, N: 0.0100% or less, and Ti: 0.010 to 0.250%, with the balance: Fe and impurities, wherein a random intensity ratio of a texture in a near-surface portion of the steel sheet is 8.0 or less, and a minimum angle formed between a maximum strength orientation in a {110} pole figure of the texture and a normal direction of a rolled surface of the steel sheet is 10° or less.
Claims6
A steel sheet having a chemical composition comprising, in mass %:
- C:
- 0.05 to 0.25%,
- Si:
- 0.2 to 2.0%,
- Mn:
- 1.2 to 3.0%,
- P:
- 0.030% or less,
- S:
- 0.050% or less,
- Al:
- 0.01 to 0.55%,
- N:
- 0.0100% or less,
- Ti:
- 0.010 to 0.250%,
- Cr:
- 0 to 0.50%,
- Ni:
- 0 to 0.50%,
- Cu:
- 0 to 0.50%,
- Nb:
- 0 to 0.040% s,
- V:
- 0 to 0.15%,
- Zr:
- 0 to 0.15%,
- Mo:
- 0 to 0.15%,
- W:
- 0 to 0.15%,
- one or more elements selected from Sn, Sb, and Te at 0 to 0.100% in total,
- one or more elements selected from Ca, Mg, and REM at 0 to 0.0050% in total, and
- B:
- 0 to 0.0050%,
- with the balance:
- Fe and impurities, wherein
- a random intensity ratio of a texture in a near-surface portion of the steel sheet is 8.0 or less, and
- a minimum angle formed between a maximum strength orientation in a {110} pole figure of the texture and a normal direction of a rolled surface of the steel sheet is 10° or less.
Dependencies are inferred from the claim text.