Title:
MOLTEN AL-ZN-PLATED STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/181427
Kind Code:
A1
Abstract:
The purpose of the present invention is to stably provide: a molten Al-Zn-plated steel sheet which exhibits excellent bending workability and corrosion resistance in a bent part; and a method for producing same. In order to achieve the foregoing, the present invention is a molten Al-Zn-plated steel sheet which comprises: a plating film having a composition which contains 45-65 mass% of Al and 1.0-3.0 mass% of Si, with the remainder comprising Zn, Fe and unavoidable impurities; and an interfacial alloy layer which is formed on the side of the plating film that serves as an interface with a base steel sheet and contains Fe, Al, Si, Zn and unavoidable impurities. The molten Al-Zn-plated steel sheet is characterized in that: the plating film has dendrites comprising mainly Al primary crystals and dendrite spaces containing Al-Zn eutectic crystals; the Al primary crystals contain an α-Al phase matrix and Zn precipitates; the Zn content in the matrix is 30 mass% or less; and the thickness of the interfacial alloy layer is 1 μm or less.
Inventors:
OOI TOSHIHIKO (JP)
ASHIKARI ICHIRO (JP)
FUJISAWA HIDESHI (JP)
TOBIYAMA YOICHI (JP)
SHIN OSAMU (JP)
ASHIKARI ICHIRO (JP)
FUJISAWA HIDESHI (JP)
TOBIYAMA YOICHI (JP)
SHIN OSAMU (JP)
Application Number:
PCT/JP2022/017434
Publication Date:
September 28, 2023
Filing Date:
April 08, 2022
Export Citation:
Assignee:
JFE GALVANIZING & COATING CO LTD (JP)
International Classes:
C23C2/12; C22C18/04; C22C21/10; C23C2/06; C23C2/28
Foreign References:
| JP2003268518A | 2003-09-25 | |||
| JPH11343559A | 1999-12-14 | |||
| JPH11343554A | 1999-12-14 | |||
| JP2013007071A | 2013-01-10 | |||
| JPH02274851A | 1990-11-09 | |||
| JP2005098923A | 2005-04-14 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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