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US 12,234,538 B2Granted
Aluminum-plated steel sheet, hot-stamped member, and method for manufacturing hot-stamped member
AssigneeNippon Steel Corporation
InventorsYuki Suzuki, Soshi Fujita, Masahiro Fuda, Hideaki Irikawa, Takeshi Imai, Fumio Eihara
Life of this patent
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Abstract
This aluminum-plated steel sheet has a steel sheet and a plating layer formed on a surface of the steel sheet, the plating layer contains one or more A group elements selected from a group consisting of Be, Mg, Ca, Sr, Ba, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn, a remainder of Al, Fe, and impurities, a thickness t of the plating layer is 10 to 60 μm, and an average grain size is 2t/3 or less and 15 μm or less in a thickness range from an outermost surface of the plating layer to a ⅔ thickness t position.
Claims6
An aluminum-plated steel sheet comprising:
- a steel sheet;
- and
- a plating layer formed on a surface of the steel sheet,
- wherein a chemical composition of the plating layer is, by mass %,
- a total content of one or more A group elements selected from Be, Mg, Ca, Sr, Ba, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, and Zn:
- 0.001% to 30.00%,
- Si:
- 0% to 20.0%,
- Fe:
- 0% to 10.0%, and
- a remainder:
- Al and impurities,
- a thickness t of the plating layer is 10 to 60 μm, and
- an average grain size is the smaller of 2t/3 or less and 15 μm or less in a thickness range from an outermost surface of the plating layer to a ⅔ thickness t position,
- wherein, in a case of measuring the A group elements in the plating layer in a thickness direction from the outermost surface of the plating layer using GDS,
- a maximum value of detection intensities of the A group elements in a range from the outermost surface of the plating layer to a ⅓ thickness t position is 2.0 times or more an average value of detection intensities of the A group elements in a range from the ⅔ thickness t position to a thickness t position.
13 more elements
Dependencies are inferred from the claim text.