Plated steel material
A plated steel material having a plating layer having an average chemical composition containing, in mass %, Zn: more than 50.00%, Al: more than 15.0% and less than 30.0%, Mg: more than 5.0% and less than 15.0%, and Si: 0.25% or more and less than 3.50%, and impurities, and wherein a total amount (ΣA) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%, a total amount (ΣB) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%, 2.0≤SMg/Si<20.0 (Formula 1), 3.0≤Si/ΣB<24.0 (Formula 2), and 26.0≤(Si/ΣB)×(Mg/Si)<375.0 (Formula 3) are satisfied, and in an X-ray diffraction pattern of the surface of the plating layer, a diffraction intensity ratio R1 defined by R1={I(16.18°)+I(32.69°)}/I(27.0°) (Formula 4) satisfies 2.5<R1 (Formula 5) is used.
1. A plated steel material having a plating layer on a surface of a steel material,
wherein the plating layer has an average chemical composition consisting of, in mass %,
Zn: more than 50.00%,
Al: more than 15.0% and less than 30.0%,
Mg: more than 5.0% and less than 15.0%,
Si: 0.25% or more and less than 3.50%,
Sn: 0% or more and less than 1.00%,
Bi: 0% or more and less than 1.00%,
In: 0% or more and less than 1.00%,
Ca: 0% or more and less than 0.60%,
Y: 0% or more and less than 0.60%,
La: 0% or more and less than 0.60%,
Ce: 0% or more and less than 0.60%,
Sr: 0% or more and less than 0.60%,
Cr: 0% or more and less than 0.25%,
Ti: 0% or more and less than 0.25%,
Ni: 0% or more and less than 0.25%,
Co: 0% or more and less than 0.25%,
V: 0% or more and less than 0.25%,
Nb: 0% or more and less than 0.25%,
Zr: 0% or more and less than 0.25%,
Mo: 0% or more and less than 0.25%,
W: 0% or more and less than 0.25%,
Ag: 0% or more and less than 0.25%,
Cu: 0% or more and less than 0.25%,
Mn: 0% or more and less than 0.25%,
Fe: 0% or more and less than 5.0%,
Sb: 0% or more and 0.5% or less,
Pb: 0% or more and 0.5% or less,
B: 0% or more and 0.5% or less,
P: 0% or more and 0.5% or less, and
impurities, and
wherein a total amount of Zn, Al and Mg is more than 96%,
a total amount (ΣA) of at least one selected from the group consisting of Sn, Bi and In is less than 1.00%,
a total amount (ΣB) of at least one selected from the group consisting of Ca, Y, La, Ce and Sr is 0.02% or more and less than 0.60%,
the amount of Mg, the amount of Si and ΣB satisfy the following Formula 1 to Formula 3, and
in an X-ray diffraction pattern of the surface of the plating layer measured using a Cu-Kα ray under conditions of an X-ray output of 40 kV and 150 mA, a diffraction intensity ratio R1 defined by the following Formula 4 satisfies the following Formula 5:
2.0≤Mg/Si<20.0 Formula 1
3.0≤Si/ΣB<24.0 Formula 2
26.0≤(Si/ΣB)×(Mg/Si)<375.0 Formula 3
R1={I(16.18°)+I(32.69°)}/I(27.0°) Formula 4
2.5<R1 Formula 5
where, Si and Mg in Formula 1 to Formula 3 are the average composition (mass %) of Si and Mg in the plating layer, in Formula 4, I(16.18°) is a diffraction intensity (cps) at 2θ=16.18° in the X-ray diffraction pattern, I(32.69°) is a diffraction intensity (cps) at 2θ=32.69° in the X-ray diffraction pattern, and I(27.0°) is a diffraction intensity (cps) at 2θ=27.0° in the X-ray diffraction pattern, and when a diffraction peak with an intensity of 1,000 cps or more appears at 2θ=27.0°, I(27.0°) in Formula 4 is 585 cps.
2. The plated steel material according to claim 1 ,
wherein, in an X-ray diffraction pattern of the surface of the plating layer measured using a Cu-Kα ray under conditions of an X-ray output of 40 kV and 150 mA, a diffraction intensity ratio R2 defined by the following Formula 6 satisfies the following Formula 7:
R2={I(24.24°)+I(28.07°)}/I(27.0°) Formula 6
2.5<R2 Formula 7
where, in Formula 6, I(24.24°) is a diffraction intensity (cps) at 2θ=24.24° in the X-ray diffraction pattern, I(28.07°) is a diffraction intensity (cps) at 2θ=28.07° in the X-ray diffraction pattern, and I(27.0°) is a diffraction intensity (cps) at 2θ=27.0° in the X-ray diffraction pattern, and when a diffraction peak with an intensity of 1,000 cps or more appears at 2θ=27.0°, I(27.0°) in Formula 6 is 585 cps.
3. The plated steel material according to claim 2 , wherein R1 defined by Formula 4 satisfies the following Formula 8:
10<R1 Formula 8.
4. The plated steel material according to claim 3 , which satisfies the following Formula 9:
3.0≤Si/ΣA<50.0 Formula 9
where, Si in Formula 9 is the average composition (mass %) of Si in the plating layer.
5. The plated steel material according to claim 2 , which satisfies the following Formula 9:
3.0≤Si/ΣA<50.0 Formula 9
where, Si in Formula 9 is the average composition (mass %) of Si in the plating layer.
6. The plated steel material according to claim 1 ,
wherein R1 defined by Formula 4 satisfies the following Formula 8:
10<R1 Formula 8.
7. The plated steel material according to claim 6 , which satisfies the following Formula 9:
3.0≤Si/ΣA<50.0 Formula 9
where, Si in Formula 9 is the average composition (mass %) of Si in the plating layer.
8. The plated steel material according to claim 1 , which satisfies the following Formula 9:
3.0≤Si/ΣA<50.0 Formula 9
where, Si in Formula 9 is the average composition (mass %) of Si in the plating layer.