Title:
Zn-Al-Mg-BASED HOT-DIPPED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/238940
Kind Code:
A1
Abstract:
This Zn-Al-Mg-based hot-dipped steel sheet comprises a hot-dipped layer formed on the surface of a steel sheet. The hot-dipped layer comprises, as an average composition, 5-22 mass% of Al and 1.0-10 mass% of Mg with the remainder including Zn and impurities. When the thickness of the hot-dipped layer is denoted by t, and a 5 mm square cross section that is parallel to the surface of the hot-dipped layer is exposed at any position selected from among a position of 3t/4, a position of t/2, and a position of t/4 from the surface of the hot-dipped layer, a fraction (B/A (%)) of a surface area fraction B of the [Zn phase] to a total surface area fraction A of the [Zn phase] and a [ternary eutectic structure of Al/MgZn2/Zn] of a plating structure in at least one cross section is 20% or higher.
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Inventors:
TOBA TETSUYA (JP)
KAWAMURA YASUAKI (JP)
KOHIGASHI YUSUKE (JP)
TANAKA TOMOHITO (JP)
KAWAMURA YASUAKI (JP)
KOHIGASHI YUSUKE (JP)
TANAKA TOMOHITO (JP)
Application Number:
PCT/JP2023/021573
Publication Date:
December 14, 2023
Filing Date:
June 09, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/06; C22C18/00; C22C18/04; C23C2/02; C23C2/40
Domestic Patent References:
| WO2018169085A1 | 2018-09-20 | |||
| WO2018169084A1 | 2018-09-20 |
Foreign References:
| JP2018532889A | 2018-11-08 | |||
| JP2021508779A | 2021-03-11 | |||
| JP2002241962A | 2002-08-28 | |||
| JPH0860324A | 1996-03-05 | |||
| CN109897990A | 2019-06-18 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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