	US 12,454,748 B2
	Plated steel sheet
Takuya Mitsunobu, Tokyo (JP); Masaaki Uranaka, Tokyo (JP); and Kohei Tokuda, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/874,145
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Jun. 19, 2023, PCT No. PCT/JP2023/022590 § 371(c)(1), (2) Date Dec. 12, 2024, PCT Pub. No. WO2023/248975, PCT Pub. Date Dec. 28, 2023.
Claims priority of application No. 2022-100351 (JP), filed on Jun. 22, 2022.
Prior Publication US 2025/0163557 A1, May 22, 2025
Int. Cl. C23C 2/06 (2006.01); B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); C22C 18/00 (2006.01); C22C 18/04 (2006.01); C23C 2/02 (2006.01); C23C 2/12 (2006.01); C23C 2/26 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01); C23C 30/00 (2006.01)

CPC C23C 2/06 (2013.01) [B32B 15/012 (2013.01); B32B 15/013 (2013.01); B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); B32B 15/20 (2013.01); C22C 18/00 (2013.01); C22C 18/04 (2013.01); C23C 2/02 (2013.01); C23C 2/12 (2013.01); C23C 2/26 (2013.01); C23C 2/29 (2022.08); C23C 2/40 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); Y10T 428/12799 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12993 (2015.01)]

9 Claims

1. A plated steel sheet comprising:

a steel sheet, and a plated layer disposed on a surface of the steel sheet,

wherein the plated layer has a chemical composition containing, in mass %,

Al: 10.0 to 25.0 mass %,

Mg: 3.0 to 10.0 mass %,

Fe: 0.01 to 2.0 mass %, and

Si: more than 0 to 2.0 mass %, and

further optionally containing one or more of Group A, Group B, and Group C:

[Group A] Ni: 0 to 1.0 mass %,

[Group B] Ca: 0 to 0.05 mass %,

[Group C] is one or more of, in mass %, Sb: 0 to 0.5%, Pb: 0 to 0.5%, Cu: 0 to 1.0%, Sn: 0 to 1.0%, Ti: 0 to 1.0%, Cr: 0 to 1.0%, Nb: 0 to 1.0%, Zr: 0 to 1.0%, Mn: 0 to 1.0%, Mo: 0 to 1.0%, Ag: 0 to 1.0%, Li: 0 to 1.0%, La: 0 to 0.5%, Ce: 0 to 0.5%, B: 0 to 0.5%, Y: 0 to 0.5%, P: 0 to 0.5%, Sr: 0 to 0.5%, Co: 0 to 0.5%, Bi: 0 to 0.5%, In: 0 to 0.5%, V: 0 to 0.5%, and W: 0 to 0.5%; wherein a total content of Sb, Pb, Cu, Sn, Ti, Cr, Nb, Zr, Mn, Mo, Ag, Li, La, Ce, B, Y, P, Sr, Co, Bi, In, V, and W is 0 to 5 mass %,

with a remainder including Zn and impurities, and

a number density of Mg₂Si phases which (a) have a major axis of 2 μm or more, and (b) are exposed on the surface of the plated layer, is 3 to 150 per area of 10,000 μm².