# US 12,110,595 B2 · Hot-dip plated steel material

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- Number: US 12,110,595 B2
- Document ID: US12110595B2
- Status: Granted
- Kind: B2
- Application number: 18/285,777
- Filed: 2023-03-31
- Published: 2024-03-21
- Granted: 2024-10-08
- Earliest claimed: 2022-04-20
- Assignees: Nippon Steel Corporation
- Applicants: Nippon Steel Corporation
- Inventors: Takuya Mitsunobu; Kohei Tokuda; Hiroshi Takebayashi
- Web page: https://patentgrep.com/patent/US12110595B2

## CPC

- C23C 2/02: Pretreatment of the material to be coated, e.g. for coating on selected surface areas (C23C2/30 takes precedence)
- C23C 2/06: Zinc or cadmium or alloys based thereon
- B32B 15/013: {one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium}
- C22C 18/04: with aluminium as the next major constituent
- C22C 38/00: Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)
- C23C 2/26: After-treatment (C23C2/14 takes precedence)
- C23C 2/28: Thermal after-treatment, e.g. treatment in oil bath
- C23C 2/29: {Cooling or quenching}
- C23C 2/40: Plates; Strips
- C23C 2/50: {Controlling or regulating the coating processes (C23C2/14 takes precedence)}
- C23C 30/00: Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C22C: ALLOYS (treatment of alloys C21D, C22F)

## Abstract

The hot-dip plated steel material includes a steel material and a hot-dip plated layer disposed on a surface of the steel material, the hot-dip plated layer has a certain chemical composition, and the hot-dip plated layer has a diffraction intensity obtained from a result of X-ray diffraction measurement, the diffraction intensity satisfying a certain relationship.

## Claims

### Claim 1

A hot-dip plated steel material comprising:
a steel material; and
a hot-dip plated layer disposed on a surface of the steel material,
wherein the hot-dip plated layer has a chemical composition containing, in terms of mass %,
Al: 10.0 to 30.0%,
Mg: 3.0 to 15.0%,
Fe: 0.01 to 15.0%,
Si: 0 to 10.0%,
Ni: 0 to 1.0%, and
Ca: 0 to 4.0%, and
further containing one or two or more elements selected from the element group consisting of Sb: 0 to 0.5%, Pb: 0 to 0.5%, Cu: 0 to 1.0%, Sn: 0 to 2.0%, 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%, in an amount of 5% or less in total, and
the remainder: Zn and an impurity, and
the hot-dip plated layer has a diffraction intensity obtained from a result of X-ray diffraction measurement, the diffraction intensity satisfying a relationship of the following formulas (1a) and (2a):
0.5≤I(100)MgZn2/{I(002)MgZn2+I(101)MgZn2}≤2.5 (1a)
0.2≤I(111)α/I(200)α≤5.0 (2a)
wherein, in the formula (1a), I(100)MgZn2 represents an MgZn2 phase (100)diffraction intensity, I(002)MgZn2 represents an MgZn2 phase (002)diffraction intensity, and I(101)MgZn2 represents an MgZn2 phase (101)diffraction intensity, and in the formula (2a), I(111)α represents an α phase (111)diffraction intensity and I(200)α represents an α phase (200)diffraction intensity.

### Claim 2 (depends on 1)

The hot-dip plated steel material according to claim 1, wherein the chemical composition of the hot-dip plated layer contains Sn: 0.05 to 0.5% in terms of mass %, and
the hot-dip plated layer has a result of X-ray diffraction measurement that an Mg2Sn phase is detected.

### Claim 3

A hot-dip plated steel material comprising:
a steel material; and
a hot-dip plated layer disposed on a surface of the steel material,
wherein the hot-dip plated layer has a chemical composition containing, in terms of mass %,
Al: 15.0 to 30.0%,
Mg: 5.0 to 10.0%,
Fe: 0.01 to 15.0%,
Si: 0 to 10.0%,
Ni: 0 to 1.0%, and
Ca: 0 to 4.0%, and
further containing one or two or more elements selected from the element group consisting of Sb: 0 to 0.5%, Pb: 0 to 0.5%, Cu: 0 to 1.0%, Sn: 0 to 2.0%, 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%, in an amount of 5% or less in total, and
the remainder: Zn and an impurity, and
the hot-dip plated layer has a diffraction intensity obtained from a result of X-ray diffraction measurement, the diffraction intensity satisfying a relationship of the following formulas (1b) and (2b):
1.0≤I(100)MgZn2/{I(002)MgZn2+I(101)MgZn2}≤2.0 (1b)
0.2≤I(111)α/I(200)α≤5.0 (2b)
wherein, in the formula (1b), I(100)MgZn2 represents an MgZn2 phase (100)diffraction intensity, I(002)MgZn2 represents an MgZn2 phase (002)diffraction intensity, and I(101)MgZn2 represents an MgZn2 phase (101)diffraction intensity, and in the formula (2b), I(111)α represents an α phase (111)diffraction intensity and I(200)α represents an α phase (200)diffraction intensity.

### Claim 4 (depends on 3)

The hot-dip plated steel material according to claim 3, wherein the chemical composition of the hot-dip plated layer contains Sn: 0.05 to 0.5% in terms of mass %, and
the hot-dip plated layer has a result of X-ray diffraction measurement that an Mg2Sn phase is detected.