Title:
Zn-Al-Mg-BASED HOT-DIP PLATED STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2019/230894
Kind Code:
A1
Abstract:
The present invention pertains to a Zn-Al-Mg-based hot-dip plated steel sheet comprising: a steel sheet; and a hot-dip plated layer formed on the surface of the steel sheet. The hot-dip plated layer contains predetermined chemical components and a predetermined metallic microstructure. The surface of the hot-dip plated layer is composed of a first region and a second region, wherein the first region is arranged to have the shape of any one among a straight line, a curve line, a figure, a number, a symbol, and a character, or a combination of two or more thereof, and the first region and the second region satisfy at least one of (a) or (b) below. (a) The first region is a region in which the proportion of Al phase exposed on the surface is less than 30 area%, and the second region is a region in which the proportion of Al phase exposed on the surface is at least 30 area%. (b) The first region has a surface roughness Ra of at least 1 nm and less than 10 nm, and the second region has a surface roughness Ra of at least 10 nm and less than 200 nm.
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Inventors:
KANETO TAIHEI (JP)
MORISHITA ATSUSHI (JP)
OOHASHI TOORU (JP)
AMANO YOKO (JP)
AIBA MASAJI (JP)
OBARA YUKI (JP)
MORISHITA ATSUSHI (JP)
OOHASHI TOORU (JP)
AMANO YOKO (JP)
AIBA MASAJI (JP)
OBARA YUKI (JP)
Application Number:
PCT/JP2019/021555
Publication Date:
December 05, 2019
Filing Date:
May 30, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/06; C22C18/04; C23C2/02
Domestic Patent References:
| WO2013002358A1 | 2013-01-03 | |||
| WO2011052268A1 | 2011-05-05 |
Foreign References:
| JPH10226865A | 1998-08-25 | |||
| JPH10204600A | 1998-08-04 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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