Title:
PLATED STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/085386
Kind Code:
A1
Abstract:
This plated steel material comprises a steel material and a plating layer which includes a Zn-Al-Mg alloy layer arranged on the surface of the steel material, wherein the plating layer has a prescribed chemical composition. On the surface of the Zn-Al-Mg alloy layer, there are dendritic MgZn2 phases with a surface roughness Sa of less than or equal to 50 nm; the surface area ratio of said dendritic MgZn2 phases with the surface roughness Sa of less than or equal to 50 nm is 30%-80% in a 5 mm2 observation field of view; and, of the dendritic MgZn2 phases with the surface roughness Sa less than or equal to 50 nm, the number of dendritic MgZn2 phases that have a surface area of greater than or equal to 0.1 mm2 is 5-100 within in a 25 mm2 observation field of view.
Inventors:
SAITO MAMORU (JP)
GOTO YASUTO (JP)
GOTO YASUTO (JP)
Application Number:
PCT/JP2021/036005
Publication Date:
April 28, 2022
Filing Date:
September 29, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C18/00; C22C18/04; C22C21/00; C22C38/00; C22C38/04; C23C2/06; C23C2/26; C23C2/40
Domestic Patent References:
| WO2019230894A1 | 2019-12-05 | |||
| WO2013002358A1 | 2013-01-03 | |||
| WO2020213686A1 | 2020-10-22 |
Foreign References:
| JP2013014794A | 2013-01-24 | |||
| JP2006283155A | 2006-10-19 | |||
| JP2004339530A | 2004-12-02 | |||
| JP2016514202A | 2016-05-19 | |||
| JP2001207249A | 2001-07-31 | |||
| JP2020176669A | 2020-10-29 |
Other References:
See also references of EP 4234735A4
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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