Title:
HOT-DIP GALVANIZED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/079970
Kind Code:
A1
Abstract:
This hot-dip galvanized steel sheet comprises a steel sheet, a boundary layer disposed on the steel sheet, and a hot-dip galvanized layer disposed on the boundary layer, said steel sheet having a predetermined chemical composition, wherein an average crystal grain size is greater than 4.0 µm in a region between the surface of the steel sheet and a 25 µm deep position from the surface of the steel sheet, an area ratio of non-recrystallized ferrite is 50% or greater in a region between a 50 µm position from the surface of the steel sheet and a 100 µm position from the surface of the steel sheet, and the maximum value of C concentration in the hot-dip galvanized layer is 0.05 mass% or greater.
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Inventors:
KIKUCHI SHOTA (JP)
AZUMA MASAFUMI (JP)
AZUMA MASAFUMI (JP)
Application Number:
PCT/JP2021/027172
Publication Date:
April 21, 2022
Filing Date:
July 20, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/46; C22C38/58; C23C2/02; C23C2/06; C23C2/40; C21D1/18; C21D9/00; C22C18/00; C22C18/04
Domestic Patent References:
WO2014024825A1 | 2014-02-13 | |||
WO2011152017A1 | 2011-12-08 | |||
WO2021002415A1 | 2021-01-07 | |||
WO2013147228A1 | 2013-10-03 |
Foreign References:
JP2019116654A | 2019-07-18 | |||
JP2010121209A | 2010-06-03 | |||
JP2020171776A | 2020-10-22 |
Other References:
See also references of EP 4227430A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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