HOT-DIP Al-Zn ALLOY-PLATED STEEL SHEET AND MANUFACTURING METHOD FOR THE SAME

Japanese Patent JP2023143619

A

To provide a hot-dip Al-Zn alloy-plated steel sheet excellent in bending workability, non-aging properties of yield elongation, and moldability.SOLUTION: A hot-dip Al-Zn alloy-plated steel sheet comprises a plated layer with Al content of 40 to 70% by mass, Si content of 0.5 to 3.0% by mass and remaining content being Zn and inevitable impurities. Given that bending workability is represented by a minimum amount of an inner distance nt (where t is a thickness of plated steel sheet and n is the number of steel sheets) of a test piece which does not cause the test piece to have cracks when, after an aging acceleration test, the same is bent at 180 degrees and an external surface of bent section thereof is visually observed with a loupe having a 10 time magnification lens in a bending test conforming to a plate adhesion test specified in JIS G 3321 (2019), has the bending workability of 6t or less. The hot-dip Al-Zn alloy-plated steel sheet also has yield elongation (YEL) after the aging acceleration test of 10% or less.SELECTED DRAWING: Figure 2

WO/2016/146581	STEEL FOR HOT FORMING
WO/2019/043473	A COATED METALLIC SUBSTRATE
JP2001115273	HOT DIP Zn-Al SERIES PLATED STEEL SHEET EXCELLENT IN SECULAR BLACKENING RESISTANCE

TOBIYAMA YOICHI
SHIN OSAMU
OI TOSHIHIKO
ASHIKARI ICHIRO
FUJISAWA HIDETSUGU

JP2022140397A

October 06, 2023

September 02, 2022

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JFE GALVANIZING & COATING CO LTD

C23C2/12; C21D9/46; C22C18/04; C22C21/10; C22C38/00; C23C2/06; C23C2/28

Kenji Sugimura
Kengo Yoshida

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