Title:
HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/157692
Kind Code:
A1
Abstract:
A hot-rolled steel sheet having a chemical composition comprising, in % by mass, 0.01 to 0.30% of C, 0.01 to 3.00% of Si, 0.20 to 3.00% of Mn, 0.030% or less of P, 0.030% or less of S, 0.001 to 2.000% of Al, 0.0100% or less of N and 0.02 to 0.50% of Ni, and having such a property that, among measurement points at which an elemental analysis is carried out in a region having a size of 250 μm × 250 μm on a surface using EPMA at measurement pitches of 1 μm, the percentage of measurement points at which the Ni content is 0.5% by mass or more is 10 to 70%.
Inventors:
ANDO JUN (JP)
HAYASHIDA TERUKI (JP)
YOKOI TATSUO (JP)
SAKAKIBARA AKIFUMI (JP)
HAYASHIDA TERUKI (JP)
YOKOI TATSUO (JP)
SAKAKIBARA AKIFUMI (JP)
Application Number:
PCT/JP2021/004305
Publication Date:
August 12, 2021
Filing Date:
February 05, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21B45/08; B21B1/22; C21D9/00; C22C38/00; C22C38/58
Domestic Patent References:
| WO2018220540A1 | 2018-12-06 | |||
| WO2020080553A1 | 2020-04-23 | |||
| WO2014051005A1 | 2014-04-03 |
Foreign References:
| JP2002309343A | 2002-10-23 | |||
| JP2000178655A | 2000-06-27 | |||
| JP2009249714A | 2009-10-29 | |||
| JP2020018844A | 2020-02-06 | |||
| JP2016204690A | 2016-12-08 |
Other References:
See also references of EP 4101554A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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