Title:
MOLTEN AL-ZN-BASED PLATED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/181428
Kind Code:
A1
Abstract:
Provided is a molten Al-Zn-based plated steel sheet that has excellent post-aging yield elongation and formability, while maintaining high bending processability. In order to achieve the above purpose, the present invention provides a molten Al-Zn-based plated steel sheet in which a plating layer has a composition that contains 40 to 70 mass% of Al and 0.5 to 3.0 mass% of Si, the remainder being Zn and unavoidable impurities, the molten Al-Zn-based plated steel sheet is characterized in that, when a test piece is bent by 180° with an inner spacing nt (where t is the plate thickness of the plated steel sheet, and n is the number of the plated steel sheets) in a bending test in conformity with a plating adhesion test described in JIS G 3321 (2019), the bending processability indicated by a minimum nt at which no cracking is recognized when the outer surface of the bent portion is observed with a 10× magnification loupe is less than or equal to 6t, and the yield elongation (YEL) after an accelerated aging test is less than or equal to 10%.
Inventors:
TOBIYAMA YOICHI (JP)
SHIN OSAMU (JP)
OOI TOSHIHIKO (JP)
ASHIKARI ICHIRO (JP)
FUJISAWA HIDESHI (JP)
SHIN OSAMU (JP)
OOI TOSHIHIKO (JP)
ASHIKARI ICHIRO (JP)
FUJISAWA HIDESHI (JP)
Application Number:
PCT/JP2022/017435
Publication Date:
September 28, 2023
Filing Date:
April 08, 2022
Export Citation:
Assignee:
JFE GALVANIZING & COATING CO LTD (JP)
International Classes:
C23C2/06; C23C2/12; C23C2/28
Foreign References:
| JP2002226960A | 2002-08-14 | |||
| JP2002302777A | 2002-10-18 | |||
| JP2021031759A | 2021-03-01 | |||
| JP2011511162A | 2011-04-07 | |||
| JPS5687654A | 1981-07-16 | |||
| JPH06122940A | 1994-05-06 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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