Plated steel sheet
AssigneeNippon Steel Corporation
InventorsTakuya Mitsunobu, Jun Maki, Hiroshi Takebayashi, Takehiro Takahashi, Kohei Tokuda
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Abstract
A plated steel sheet includes: a steel sheet; and a plating layer that is formed on at least a part of a surface of the steel sheet, in which a chemical composition of the plating layer includes, by mass %, Al: more than 5.00% and 35.00% or less, Mg: 3.00% to 15.00%, Si: 0% to 2.00%, Ca: 0% to 2.00%, and a remainder of Zn and impurities, in which in a cross section of the plating layer in a thickness direction, the area ratio of a lamellar structure in which an (Al—Zn) phase and a MgZn2 phase are arranged in layers is 10% to 90%, a lamellar spacing of the lamellar structure is 2.5 μm or less, and the area ratio of an (Al—Zn) dendrite is 35% or less.
Claims19
A plated steel sheet comprising:
- a steel sheet;
- and
- a plating layer that is formed on at least a part of a surface of the steel sheet,
- wherein a chemical composition of the plating layer includes, by mass %,
- Al:
- more than 5.00% and 35.00% or less,
- Mg:
- 3.00% to 15.00%,
- Si:
- 0% to 2.00%,
- Ca:
- 0% to 2.00%, and
- a remainder of Zn and impurities,
- in a cross section of the plating layer in a thickness direction,
- an area ratio of a lamellar structure in which an (Al—Zn) phase and a MgZn2 phase are arranged in layers is 10% to 90%,
- a lamellar spacing of the lamellar structure is 2.5 μm or less, and
- an area ratio of an (Al—Zn) dendrite is 35% or less.
Dependencies are inferred from the claim text.