A vacuum insulated cabinet structure includes first and second cover members having pre-deformed portions and perimeter portions. The perimeter portions of the first and second cover members are disposed along first and second planar levels and the pre-deformed portions of the first and second cover members include portions thereof extending outwardly relative to the first and second planar levels. A thermal bridge interconnects the first cover member and the second cover member at the perimeter portions thereof to define an insulating cavity therebetween. The insulating cavity is a sealed cavity having a vacuum drawn therefrom. The pre-deformed portions of the first and second cover members move inwardly towards the first and second planar levels under a force of the vacuum within the insulating cavity.

This hot-stamping formed article includes a steel sheet, all or part of the steel sheet has a predetermined chemical composition, at a ¼ depth position of a sheet thickness from a surface of the steel sheet, a microstructure contains, by vol %, more than 90.0% of martensite, the average value of Vickers hardness in a region that is 0.3 mm in a sheet thickness direction and 0.6 mm in a direction orthogonal to the sheet thickness direction is 670 or more, the standard deviation of the Vickers hardness in the region is 20 or less, and the tensile strength is 2300 MPa or more.

A hot-stamping formed body includes a steel sheet and a zinc-plated layer that is provided on the steel sheet. The steel sheet has a predetermined chemical composition, and an area % of martensite is 90% or more in microstructure at a position corresponding to ¼ of a sheet thickness of the steel sheet from a surface of the steel sheet in a sheet thickness direction. The zinc-plated layer includes a F phase and a Fe—Zn solid solution, and a cross-sectional area ratio of voids present in the zinc-plated layer is 15.0% or less.

This steel sheet for hot stamping includes a base material, an Al—Si alloy plating layer in which the Al content is 75 mass % or more, the Si content is 3 mass % or more and the total of the Al content and the Si content is 95 mass % or more, an Al oxide coating having a thickness of 0 to 20 nm and a Ni plating layer in which the Ni content is more than 90 mass % in this order, the base material has a predetermined chemical composition, the Al—Si alloy plating layer has a thickness of 7 to 148 μm, and the Ni plating layer has a thickness of more than 200 nm and 2500 nm or less.

These steel sheet for hot stamping and hot-stamping formed body have predetermined chemical composition and metallographic structures, and, in textures of a surface layer region and an inside region, ratios between a pole density of an orientation group consisting of {001}<1-10> to {001}<−1-10> and a pole density of an orientation group consisting of {111}<1-10> to {111}<−1-12> are controlled.

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/m.sup.2) in the solidified zinc layer to a content of Zn (g/m.sup.2) in the galvanized layer is 10 to 95%.

A multi-opening oven assembly for simultaneously heating a plurality of blanks, for example aluminum blanks, before forming the heated blanks in a production line is provided. The oven assembly includes vertically aligned shelves to present a plurality of chambers for heating the blanks. A table including an entry side platform and an exit side platform moves vertically along the oven assembly. A rail system extends along the platforms and the shelves to convey the blanks in and out of the chambers. Once one set of heated blanks is removed from a first chamber, the table moves vertically to a second chamber and is ready to receive the next set of heated blanks. A continuous supply of heated blanks is provided for high throughput. The oven assembly is preferably disposed in a press adjacent a forming station of an existing production line and thus, no additional floor space is required.

A rolled steel sheet, for press hardening is provided, having a chemical composition where Ti/N>3.42, and the carbon, manganese, chromium and silicon contents satisfy: $2.6C+\frac{\mathrm{Mn}}{5.3}+\frac{\mathrm{Cr}}{13}+\frac{\mathrm{Si}}{15}\ge 1.1\%.$
The sheet has a nickel content Ni.sub.surf at any point of the steel in the vicinity of the surface over a depth Δ, such that: Ni.sub.surf >Ni.sub.nom, Ni.sub.nom denoting the nominal nickel content of the steel, and such that, Ni.sub.max denoting the maximum nickel content within Δ: $\frac{\left({\mathrm{Ni}}_{\max }+{\mathrm{Ni}}_{\mathrm{nom}}\right)}{2}\times \left(\Delta \right)\ge 0.6,$
and such that: $\frac{\left({\mathrm{Ni}}_{\max }-{\mathrm{Ni}}_{\mathrm{nom}}\right)}{\Delta }\ge 0.01$
and the surface density of all of the particles D.sub.i and the surface density of the particles D.sub.(>2 μm) larger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet:
D.sub.i+6.75 D.sub.(>2 μm) <270
D.sub.i and D.sub.(>2 μm) being expressed as number of particles per square millimeter, and said particles denoting all the oxides, sulfides, and nitrides, either pure or combined such as oxysulfides and carbonitrides, present in the steel matrix.

The present invention provides a hot stamping component having a tensile strength of 1350 Mpa or greater, including a microstructure including prior austenite grains (PAG), wherein an average particle diameter of the PAGs is 35 μm or less.

Examples of methods of hot forming structural components are provided. The methods include heating a blank made from an Ultra High Strength Steel with an aluminum coating and forming the heated blank in a multi-step apparatus.