	US 12,435,404 B2
	Aluminum alloy-plated steel sheet, hot-formed member, and methods for manufacturing aluminum alloy-plated steel sheet and hot-formed member
Hyeon-Seok Hwang, Gwangyang-si (KR); Suk-Kyu Lee, Gwangyang-si (KR); Jong-Gi Oh, Gwangyang-si (KR); Kwang-Tai Min, Gwangyang-si (KR); and Dong-Seok Shin, Gwangyang-si (KR)
Assigned to POSCO, Pohang-si (KR)
Appl. No. 17/765,306
Filed by POSCO, Pohang-si (KR)
PCT Filed Dec. 11, 2020, PCT No. PCT/KR2020/018115 § 371(c)(1), (2) Date Mar. 30, 2022, PCT Pub. No. WO2021/125696, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 10-2019-0170140 (KR), filed on Dec. 18, 2019.
Prior Publication US 2022/0372608 A1, Nov. 24, 2022
Int. Cl. C23C 2/12 (2006.01); C22C 21/10 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01)

CPC C23C 2/12 (2013.01) [C22C 21/10 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); C22C 38/14 (2013.01); C23C 2/28 (2013.01); C23C 2/29 (2022.08); C23C 2/40 (2013.01); C21D 2211/002 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01)]

3 Claims

1. An aluminum alloy-plated steel sheet comprising:

a base steel sheet; and

an aluminum alloy plating layer formed on the base steel sheet,

wherein the aluminum alloy plating layer comprises, by weight %, Zn: 21% to 35%, Si: 1% to 6.9%, Fe: 2% to 12%, and a balance of Al and inevitable impurities,

wherein Al/(Zn+Si) of the aluminum alloy plating layer is 1.3 to 2.6, where Al, Zn, and Si respectively refer to Al, Zn, and Si contents in weight %.