Title:
HOT-ROLLED STEEL
Document Type and Number:
WIPO Patent Application WO/2021/095185
Kind Code:
A1
Abstract:
Provided is a hot-rolled steel having oxide scale on at least a portion of the surface of a base material, wherein the chemical composition of the base material, expressed as mass%, is C: 0.01-0.10%, Si: 0.04-0.40%, Mn: 0.30-1.50%, Cu: 0.02-0.50%, Sb: 0.01-0.30%, Al: 0.005-0.055%, P: not more than 0.020%, S: 0.0005-0.015%, N: not more than 0.010%, O: 0.0005-0.0035%, Mo: 0-0.50%, W: 0-0.50%, Ni: 0-0.50%, Sn: 0-0.50%, As: 0-0.30%, Co: 0-0.30%, Cr: 0-0.70%, Ti: 0-0.050%, Nb: 0-0.10%, V: 0-0.10%, Zr: 0-0.050%, Ta: 0-0.050%, B: 0-0.010%, Ca: 0-0.010%, Mg: 0-0.010%, REM: 0-0.010%, and the balance: Fe and unavoidable impurities, wherein a layer enriched in Si, Cu, and Sb is present at the interface between the base material and the oxide scale.
Inventors:
IMAMURA JUNKO (JP)
NAGASAWA MAKOTO (JP)
KODAMA MASAYUKI (JP)
TOYOKAWA YU (JP)
NAGASAWA MAKOTO (JP)
KODAMA MASAYUKI (JP)
TOYOKAWA YU (JP)
Application Number:
PCT/JP2019/044611
Publication Date:
May 20, 2021
Filing Date:
November 13, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/60; C22C38/00
Domestic Patent References:
| WO2018038198A1 | 2018-03-01 |
Foreign References:
| KR20130143374A | 2013-12-31 | |||
| KR20150057815A | 2015-05-28 | |||
| JP2018519422A | 2018-07-19 | |||
| JP2019116649A | 2019-07-18 | |||
| JPH10110237A | 1998-04-28 | |||
| JPH0925536A | 1997-01-28 |
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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