Zinc-plated steel sheet for hot stamping, method of manufacturing zinc-plated steel sheet for hot stamping, and hot-stamping formed body
AssigneeNippon Steel Corporation
InventorsHiroyuki NAKAGAWA, Hiroki AKUTSU
Life of this patent
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Abstract
A zinc-plated steel sheet for hot stamping includes a steel sheet having a predetermined chemical composition and a zinc plating film disposed on the steel sheet. In the zinc plating film, the plating adhesion amount is 15.0 g/m2 or more and less than 40.0 g/m2, the Fe concentration is 1.5 mass % or more and 8.0 mass % or less, the Al content is 100 mg/m2 or more and 400 mg/m2 or less, the Al concentration is 0.50 mass % or more and 3.00 mass % or less, and the remainder consists of Zn and impurities.
Claims8
A zinc-plated steel sheet for hot stamping comprising a steel sheet and a zinc plating film disposed on the steel sheet,
- wherein the steel sheet includes, as a chemical composition, by mass %:
- C:
- 0.02% to 0.58%;
- Mn:
- 0.10% to 3.00%;
- sol. Al:
- 0.001% to 1.000%;
- Si:
- 2.00% or less;
- P:
- 0.100% or less;
- S:
- 0.005% or less;
- N:
- 0.0100% or less;
- Ti:
- 0% to 0.200%;
- Nb:
- 0% to 0.200%;
- V:
- 0% to 1.00%;
- W:
- 0% to 1.00%;
- Cr:
- 0% to 1.00%;
- Mo:
- 0% to 1.00%;
- Cu:
- 0% to 1.00%;
- Ni:
- 0% to 1.00%;
- B:
- 0% to 0.0100%;
- Ca:
- 0% to 0.05%;
- REM:
- 0% to 0.05%;
- and
- a remainder consisting of Fe and impurities, and
- in the zinc plating film,
- a plating adhesion amount is 15.0 g/m2 or more and less than 40.0 g/m2,
- a Fe concentration is 1.5 mass % or more and 8.0 mass % or less,
- an Al content is 100 mg/m2 or more and 400 mg/m2 or less,
- an Al concentration is 0.50 mass % or more and 3.00 mass % or less, and
- a remainder consists of Zn and impurities.
A hot-stamping formed body comprising a steel sheet and a film disposed on the steel sheet,
- wherein the steel sheet includes, as a chemical composition, by mass %:
- C:
- 0.02% to 0.58%;
- Mn:
- 0.10% to 3.00%;
- sol. Al:
- 0.001% to 1.000%;
- Si:
- 2.00% or less;
- P:
- 0.100% or less;
- S:
- 0.005% or less;
- N:
- 0.0100% or less;
- Ti:
- 0% to 0.200%;
- Nb:
- 0% to 0.200%;
- V:
- 0% to 1.00%;
- W:
- 0% to 1.00%;
- Cr:
- 0% to 1.00%;
- Mo:
- 0% to 1.00%;
- Cu:
- 0% to 1.00%;
- Ni:
- 0% to 1.00%;
- B:
- 0% to 0.0100%;
- Ca:
- 0% to 0.05%;
- REM:
- 0% to 0.05%;
- and
- a remainder consisting of Fe and impurities, and
- in the film,
- in GDS measurement in a region from a surface of the film to a depth position of 100 μm from the surface, Zntotal as a cumulative amount of Zn is 10.0 g/m2 or more and less than 40.0 g/m2,
- in GDS measurement in a region from the surface to a peak position of Al, a sum of Zna as a cumulative amount of Zn and a cumulative amount of Mn is 25.0 g/m2 or less and a sum of a cumulative amount of Al, a cumulative amount of Si, and a cumulative amount of Cr is 60 mg/m2 or more and 240 mg/m2 or less,
- Zntotal−Zna is 3.0 g/m2 or more and 30.0 g/m2 or less, and
- an arithmetic average roughness Ra is 1.50 μm or more and 4.50 μm or less.
A zinc-plated steel sheet for hot stamping comprising a steel sheet and a zinc plating film disposed on the steel sheet,
- wherein the steel sheet includes, as a chemical composition, by mass %:
- C:
- 0.02% to 0.58%;
- Mn:
- 0.10% to 3.00%;
- sol. Al:
- 0.001% to 1.000%;
- Si:
- 2.00% or less;
- P:
- 0.100% or less;
- S:
- 0.005% or less;
- N:
- 0.0100% or less;
- Ti:
- 0% to 0.200%;
- Nb:
- 0% to 0.200%;
- V:
- 0% to 1.00%;
- W:
- 0% to 1.00%;
- Cr:
- 0% to 1.00%;
- Mo:
- 0% to 1.00%;
- Cu:
- 0% to 1.00%;
- Ni:
- 0% to 1.00%;
- B:
- 0% to 0.0100%;
- Ca:
- 0% to 0.05%;
- REM:
- 0% to 0.05%;
- and
- a remainder comprising Fe and impurities, and
- in the zinc plating film,
- a plating adhesion amount is 15.0 g/m2 or more and less than 40.0 g/m2,
- a Fe concentration is 1.5 mass % or more and 8.0 mass % or less,
- an Al content is 100 mg/m2 or more and 400 mg/m2 or less,
- an Al concentration is 0.50 mass % or more and 3.00 mass % or less, and
- a remainder comprises Zn and impurities.
A hot-stamping formed body comprising a steel sheet and a film disposed on the steel sheet,
- wherein the steel sheet includes, as a chemical composition, by mass %:
- C:
- 0.02% to 0.58%;
- Mn:
- 0.10% to 3.00%;
- sol. Al:
- 0.001% to 1.000%;
- Si:
- 2.00% or less;
- P:
- 0.100% or less;
- S:
- 0.005% or less;
- N:
- 0.0100% or less;
- Ti:
- 0% to 0.200%;
- Nb:
- 0% to 0.200%;
- V:
- 0% to 1.00%;
- W:
- 0% to 1.00%;
- Cr:
- 0% to 1.00%;
- Mo:
- 0% to 1.00%;
- Cu:
- 0% to 1.00%;
- Ni:
- 0% to 1.00%;
- B:
- 0% to 0.0100%;
- Ca:
- 0% to 0.05%;
- REM:
- 0% to 0.05%;
- and
- a remainder comprising Fe and impurities, and
- in the film,
- in GDS measurement in a region from a surface of the film to a depth position of 100 μm from the surface, Zntotal as a cumulative amount of Zn is 10.0 g/m2 or more and less than 40.0 g/m2,
- in GDS measurement in a region from the surface to a peak position of Al, a sum of Zna as a cumulative amount of Zn and a cumulative amount of Mn is 25.0 g/m2 or less and a sum of a cumulative amount of Al, a cumulative amount of Si, and a cumulative amount of Cr is 60 mg/m2 or more and 240 mg/m2 or less,
- Zntotal−Zna is 3.0 g/m2 or more and 30.0 g/m2 or less, and
- an arithmetic average roughness Ra is 1.50 μm or more and 4.50 μm or less.
Dependencies are inferred from the claim text.