	US 12,071,691 B2
	Plated steel sheet for automobile structural members
Takuya Mitsunobu, Tokyo (JP); Takehiro Takahashi, Tokyo (JP); and Hiroshi Takebayashi, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/250,774
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Dec. 24, 2021, PCT No. PCT/JP2021/048191 § 371(c)(1), (2) Date Apr. 27, 2023, PCT Pub. No. WO2022/153840, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 2021-004012 (JP), filed on Jan. 14, 2021.
Prior Publication US 2023/0383392 A1, Nov. 30, 2023
Int. Cl. C23C 2/06 (2006.01); B32B 15/01 (2006.01); C21D 1/74 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 18/04 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C23C 2/40 (2006.01)

CPC C23C 2/06 (2013.01) [B32B 15/013 (2013.01); C21D 1/74 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0236 (2013.01); C21D 8/0278 (2013.01); C21D 9/46 (2013.01); C22C 18/04 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C23C 2/40 (2013.01)]

8 Claims

1. A plated steel sheet for automobile structural members comprising:

a steel sheet;

a plating layer formed on at least a part of a surface of the steel sheet; and

an oxide layer formed on at least a part of a surface of the plating layer,

wherein the plating layer contains, as a chemical composition, by mass %,

Al: 0.5% to 35.0%,

Mg: 0.5% to 15.0%,

Si: 0% to 2.0%,

Ca: 0% to 2.0%,

Fe: 0% to 2.0%,

La+Ce: 0% to 0.5% in total,

Sb: 0% to 0.5%,

Pb: 0% to 0.5%,

Sr: 0% to 0.5%,

Sn: 0% to 1.0%,

Cu: 0% to 1.0%,

Ti: 0% to 1.0%,

Ni: 0% to 1.0%,

Mn: 0% to 1.0%,

Cr: 0% to 1.0%,

Nb: 0% to 1.0%,

Zr: 0% to 1.0%,

Mo: 0% to 1.0%,

Li: 0% to 1.0%,

Ag: 0% to 1.0%,

B: 0% to 0.5%,

Y: 0% to 0.5%,

P: 0% to 0.5%, and

a remainder of Zn and impurities, and

when measurement by XPS is performed at a position 5.0 nm below a surface of the oxide layer in a thickness direction, I_Mg/I_MgOx, which is a ratio of a maximum detected intensity of Mg to a maximum detected intensity of an oxide or hydroxide of Mg, is 0.00 or greater and 1.20 or less.