Abstract: A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as an upper layer of the base material and containing Zn and Ni. A region of the Zn-based plating layer on a base material side is a Fe—Zn solid solution containing Ni, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution containing Ni adjacent to an interface between the base material and the Zn-based plating layer.

Abstract: A plated steel sheet for hot stamping including a base metal and a galvanized layer that is formed on a surface of the base metal, wherein the galvanized layer includes a galvannealed layer, a solidified zinc layer, and an oxide layer containing Al, in this order from the base metal, and a proportion of a content of Zn (g/m2) in the solidified zinc layer to a content of Zn (g/m2) in the galvanized layer is 10 to 95%.

Abstract: A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as a layer above the base material and containing Zn. A base material side of the Zn-based plating layer is a Fe—Zn solid solution, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution adjacent to an interface between the base material and the Zn-based plating layer.

Abstract: This Zn-plated hot stamped product includes a steel, a Zn-based plating layer, and an oxide layer, in which an upper layer which is a region on a surface side of the Zn-based plating layer has a two-phase structure of a ? phase and an Fe—Zn solid solution, and a lower layer which is a region of the Zn-based plating layer excluding the upper layer has a single-phase structure of an Fe—Zn solid solution, an upper layer thickness and a lower layer thickness satisfy the following expression, a Mn content ratio of Max. Mn/Min. Mn, which is a ratio of a maximum value Max. Mn to a minimum value Min. Mn of an Mn content on a surface of the Zn-plated hot stamped product, is 10.0 or less, and an average value Ave. Mn is 0.5 to 7.5% by mass %. 0.20?upper layer thickness/(upper layer thickness+lower layer thickness)?0.

Abstract: A plated steel sheet for hot stamping including a base metal and a galvanized layer that is formed on a surface of the base metal, wherein the galvanized layer includes a galvannealed layer, a solidified zinc layer, and an oxide layer containing Al, in this order from the base metal, and a proportion of a content of Zn (g/m2) in the solidified zinc layer to a content of Zn (g/m2) in the galvanized layer is 10 to 95%.

Abstract: A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as an upper layer of the base material and containing Zn and Ni. A region of the Zn-based plating layer on a base material side is a Fe—Zn solid solution containing Ni, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution containing Ni adjacent to an interface between the base material and the Zn-based plating layer.

Abstract: A hot stamped component, includes: a base material; and a Zn-based plating layer provided in contact with the base material as a layer above the base material and containing Zn. A base material side of the Zn-based plating layer is a Fe—Zn solid solution, and two or more twins exist in 10 crystal grains of the Fe—Zn solid solution adjacent to an interface between the base material and the Zn-based plating layer.

Abstract: This high-strength cold-rolled steel sheet has a predetermined chemical composition, wherein a microstructure at a ¼ position of a sheet thickness from a surface includes predetermined ranges of volume percentages of tempered martensite, residual austenite, ferrite and bainite, and martensite, wherein a microstructure at a position 25 ?m from the surface includes, predetermined ranges of volume percentage of ferrite and bainite, and martensite and tempered martensite, wherein in the position 25 ?m from the surface, an average grain size of the martensite and the tempered martensite is 5.0 ?m or less, a tensile strength is 1,310 MPa or more, and a uniform elongation is 5.0% or more, and R/t is 5.0 or less, the R/t being a ratio of a limit bend radius R in 90° V-bending to a sheet thickness t.

Abstract: This high-strength cold-rolled steel sheet has a predetermined chemical composition, a microstructure at a ¼ position of a sheet thickness from a surface includes, by a volume percentage, 70.0% or more of tempered martensite, more than 3.0% and less than 10.0% of residual austenite, a total of 25.0% or less of ferrite and bainite, and 5.0% or less of martensite, a microstructure at a position 25 ?m from the surface includes, by the volume percentage, a total of 70% or more of ferrite and bainite and a total of 30% or less of martensite and tempered martensite, in the position 25 ?m from the surface, an average grain size of the martensite and the tempered martensite is 5.0 ?m or less, a tensile strength is 1,310 MPa or more, a uniform elongation is 5.0% or more, and Rh is 5.0 or less, the Rh/t being a ratio of a limit bend radius R in 90° V-bending to a sheet thickness t.

Abstract: [Object] To provide a method of manufacturing a plate-like molded body having a thickened portion in a region spaced apart from an edge in a substantially flat plate-like portion. [Solution] Provided is a method of manufacturing a plate-like molded body having a plurality of thickened portions, including at least a drawing step of obtaining by a drawing process a cylindrical drawn molded body including a flat plate portion and a cylindrical drawn portion that swells in such a manner as to project from the flat plate portion and has a circular top portion.

Abstract: A hot stamp molded body that can be produced highly efficiently without causing sticking of plating to a mold, when an electrogalvanized steel sheet with a light plating weight is hot-stamped using a rapidly heating method such as Joule heating and induction heating, and can secure favorable paint adhesiveness without a posttreatment such as shotblasting after hot stamping, as well as a method for producing the same.

Abstract: A galvannealed steel sheet includes: a steel sheet; a coating layer on a surface of the steel sheet; and a mixed layer formed between the steel sheet and the coating layer, in which the mixed layer includes a base iron portion having fine grains having a size of greater than 0 ?m and equal to or smaller than 2 ?m, a Zn—Fe alloy phase, and oxides containing one or more types of Mn, Si, Al, and Cr, and in the mixed layer, the oxides and the Zn—Fe alloy phase are present in grain boundaries that form the fine grains and the Zn—Fe alloy phase is tangled with the base iron portion. [Mn]+[Si]+[Al]+[Cr]?0.

Abstract: [Object] To provide a method of manufacturing a plate-like molded body having a thickened portion in a region spaced apart from an edge in a substantially flat plate-like portion. [Solution] Provided is a method of manufacturing a plate-like molded body having a plurality of thickened portions, including at least a drawing step of obtaining by a drawing process a cylindrical drawn molded body including a flat plate portion and a cylindrical drawn portion that swells in such a manner as to project from the flat plate portion and has a circular top portion.

Abstract: A hot stamp molded body that can be produced highly efficiently without causing sticking of plating to a mold, when an electrogalvanized steel sheet with a light plating weight is hot-stamped using a rapidly heating method such as Joule heating and induction heating, and can secure favorable paint adhesiveness without a posttreatment such as shotblasting after hot stamping, as well as a method for producing the same.

Abstract: A galvannealed steel sheet includes: a steel sheet; a coating layer on a surface of the steel sheet; and a mixed layer formed between the steel sheet and the coating layer, in which the mixed layer includes a base iron portion having fine grains having a size of greater than 0 ?m and equal to or smaller than 2 ?m, a Zn—Fe alloy phase, and oxides containing one or more types of Mn, Si, Al, and Cr, and in the mixed layer, the oxides and the Zn—Fe alloy phase are present in grain boundaries that form the fine grains and the Zn—Fe alloy phase is tangled with the base iron portion. [Mn]+[Si]+[Al]+[Cr]?0.