Title:
HOT-DIP AL−ZN−MG−SI−SR PLATED STEEL SHEET AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/179148
Kind Code:
A1
Abstract:
In order to provide a hot-dip Al−Zn−Mg−Si−Sr plated steel sheet having good surface appearance and having excellent corrosion resistance at a processed portion thereof, the present invention is characterized in that a plating layer has a composition containing 25-70 mass% of Al, 0.6-5 mass% of Si, 0.1-10 mass% of Mg, and 0.001-1.0 mass% of Sr, the balance being Zn and incidental impurities, the plating layer includes an interface alloy layer provided at an interface with an underlying steel sheet, and a main layer provided on the alloy layer, and an Al−Si−Sr alloy having an average major axis length of 1 μm or less is provided between the main layer and the interface alloy layer.
Inventors:
TOBIYAMA YOICHI (JP)
MIYAKE HIDENORI (JP)
OOI TOSHIHIKO (JP)
IWANO SUMIHISA (JP)
KANNO FUMITAKA (JP)
MIYAKE HIDENORI (JP)
OOI TOSHIHIKO (JP)
IWANO SUMIHISA (JP)
KANNO FUMITAKA (JP)
Application Number:
PCT/JP2019/045521
Publication Date:
September 10, 2020
Filing Date:
November 14, 2019
Export Citation:
Assignee:
JFE GALVANIZING & COATING CO LTD (JP)
International Classes:
C23C2/12; C22C18/04; C22C21/10; C23C2/06; C23C2/26
Foreign References:
| JP2007284718A | 2007-11-01 | |||
| JP2011514934A | 2011-05-12 | |||
| JP2018172783A | 2018-11-08 |
Attorney, Agent or Firm:
SUGIMURA, Kenji (JP)
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