Plated steel sheet having fine and even plating structure
Provided is a plated steel sheet having an excellent quality with fine and even plating texture, the plated steel sheet including a base steel sheet and a Zn plating layer formed on the base steel sheet, wherein a Zn crystal in the plating layer has a size of 5 μm or less.
1. A plated steel sheet having a fine and even plating texture, the plated steel sheet comprising:
a Zn-based plating layer formed on a steel sheet,
wherein the Zn-based plating layer includes a Zn single-phase texture having an average particle size of 5 μm or less; and
a Zn single-phase distribution B/A in the plating layer satisfies a condition of being 0.5 to 1.0, and thus the Zn single-phase is formed having an even distribution with respect to a thickness direction of the plating layer,
wherein A is a fraction of the entire Zn single-phase with respect to the thickness direction of the plating layer and B is a fraction of the Zn single-phase in an outer surface layer portion of the plating layer, the surface layer portion being defined by a region from an outer surface of the plating layer to a centerpoint of the plating layer in the thickness direction of the plating layer, and
wherein A is 15 to 40% by area.
2. The plated steel sheet of claim 1 , wherein:
a size of a sequin of the plating layer is 300 to 500 μm.
3. The plated steel sheet of claim 1 , wherein:
the plating layer has a contact-type pressure cooling pattern on a surface thereof.
4. The plated steel sheet of claim 3 , wherein:
the contact-type pressure cooling pattern is in the form of a woven cloth, a net, or an irregularly intertwined line.
5. The plated steel sheet of claim 1 , wherein:
the plating layer further includes a Mg component, and
the plating layer includes a MgZn 2 phase.
6. The plated steel sheet of claim 5 , wherein:
a (112)/(201) ratio on the MgZn 2 phase is 0.6 or more.
7. The plated steel sheet of claim 6 , wherein:
the plating layer is a Zn—Al—Mg alloy plating layer further including an Al component.
8. The plated steel sheet of claim 6 , wherein:
a thickness of the plating layer is 5 to 50 μm.
9. A plated steel sheet having a fine and even plating texture, the plated steel sheet comprising:
a Zn-based plating layer formed on a steel sheet,
wherein the Zn-based plating layer includes a Zn single-phase texture having an average particle size of 5 μm or less; and
a Zn single-phase distribution B/A in the plating layer satisfies a condition of being 0.5 to 1.0, and thus the Zn single-phase is formed having an even distribution with respect to a thickness direction of the plating layer,
wherein A is a fraction of the entire Zn single-phase with respect to the thickness direction of the plating layer and B is a fraction of the Zn single-phase in an outer surface layer portion of the plating layer, the surface layer portion being defined by a region from an outer surface of the plating layer to a centerpoint of an entire thickness of the plating layer in the thickness direction of the plating layer,
wherein the plating layer has a pattern on a surface thereof, and
wherein the pattern is in the form of a woven cloth, a net, or an irregularly intertwined line.
10. A plated steel sheet having a fine and even plating texture, the plated steel sheet comprising:
a Zn-based plating layer formed on a steel sheet,
wherein the Zn-based plating layer includes a Zn single-phase texture having an average particle size of 5 μm or less; and
a Zn single-phase distribution B/A in the plating layer satisfies a condition of being 0.5 to 1.0, and thus the Zn single-phase is formed having an even distribution with respect to a thickness direction of the plating layer,
wherein A is a fraction of the entire Zn single-phase with respect to the thickness direction of the plating layer and B is a fraction of the Zn single-phase in an outer surface layer portion of the plating layer, the surface layer portion being defined by a region from an outer surface of the plating layer to a centerpoint of an entire thickness of the plating layer in the thickness direction of the plating layer, and
wherein the plating layer further includes a Mg component, and the plating layer includes a MgZn 2 phase.
11. The plated steel sheet of claim 10 , wherein:
a (112)/(201) ratio on the MgZn 2 phase is 0.6 or more.
12. The plated steel sheet of claim 11 , wherein:
the plating layer is a Zn—Al—Mg alloy plating layer further including an Al component.
13. The plated steel sheet of claim 11 , wherein:
a thickness of the plating layer is 5 to 50 μm.