MOLTEN AL-ZN-BASED PLATED STEEL SHEET AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2023/181429

A1

Provided is a molten Al-Zn-based plated steel sheet that has excellent bending processability and non-aging property of yield elongation, and that also has good formability.　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 containing 40 to 70 mass% of Al and 0.5 to 3.0 mass% of Si, the balance being Zn and unavoidable impurities, characterized in that: when, in a bending test in conformity with the plating adhesion test described in JIS G 3321(2019), 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) after an accelerated aging test, and the outer surface of the bent portion is observed with a 10x magnifying glass, the bending processability indicated by a minimum nt at which no cracking is recognized is less than or equal to 6t, and the yield elongation (YEL) after the accelerated aging test is less than or equal to 10%.

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TOBIYAMA YOICHI (JP)
SHIN OSAMU (JP)
OOI TOSHIHIKO (JP)
ASHIKARI ICHIRO (JP)
FUJISAWA HIDESHI (JP)

PCT/JP2022/017437

September 28, 2023

April 08, 2022

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JFE GALVANIZING & COATING CO LTD (JP)

C23C2/06; C23C2/12; C23C2/28

JP2002226960A	2002-08-14
JP2002302777A	2002-10-18
JP2021031759A	2021-03-01
JP2011511162A	2011-04-07
JPS5687654A	1981-07-16
JPH06122940A	1994-05-06

SUGIMURA Kenji (JP)

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