voestalpine Stahl GmbH

A high strength steel strip or sheet includes in wt. %: 0.1-0.2 C, 0.3-0.9 Si, 1.4-3.0 Mn, 0.03-1.0 Al, 0.5-1.5 Si+Al. The strip or sheet has a tensile strength (R m ) of 780-970 MPa and a microstructure including 5-25 vol % retained austenite. The retained austenite fulfils a mechanical stability (k p ) of 10-35, a carbon content x cγ of the retained austenite of 0.7-1.0, and RA*k p /x cγ ≥200. A method includes double annealing cycle for producing the strip or sheet.

A composition for coating metal surfaces includes a binding agent having a phenolic resin, an epoxy resin, in particular phenoxy resin, a polyester resin (soft resin) and a polyisocyanate, further having at least one conductive pigment, a corrosion resistant pigment and a solvent. The coating layer obtained from the composition by drying is corrosion-resistant, non-flammable, forming-compatible and weldable.

The invention provides a battery tray for holding a battery, comprising: a tray housing; wherein a layer of electrically conductive tracks is arranged on or above a continuous first layer of the tray housing on the concave side thereof, and wherein a plurality of electrically readable deformation measuring structures is formed in the layer of electrically conductive tracks at least on a flat section of the tray housing.

The invention provides a battery tray for holding a battery, in particular a vehicle battery, and a method for manufacturing a battery tray. The battery tray comprises at least: a tray housing; wherein a layer of electrically conductive tracks is arranged on or above a continuous first layer of the tray housing made of a composite material on the concave side thereof, and wherein a plurality of electrically readable deformation measuring structures is formed in the layer of electrically conductive tracks at least on a flat section of the tray housing.

A method for producing hardened steel components is provided. A sheet bar is cut from a galvanized strip made of a hardenable steel alloy. The sheet bar is cold-formed into a component blank and heated to a temperature that produces a structural change to austenite. The austenitized component blank is conveyed to a form hardening tool and is held in a form-fitting manner by an upper tool and lower tool, which have a shape essentially corresponding to that of the component blank. Due to the contact of the material of the component blank with the tools, the heat is removed from the steel material quickly enough that a martensitic hardening occurs. After the galvanization of the metal strip and before the temperature increase for achieving the austenitization, tin is applied to the surface of the strip, sheet blank, or component blank.

The present invention relates to a device for storing or conducting hydrogen, in particular a hydrogen tank or hydrogen line, wherein the device is constructed in multiple layers from an inner side oriented toward the hydrogen to an outer side, wherein a layer located further inside has a lower diffusion coefficient (D) for hydrogen than the respective subsequent layer D inside <D 2 < . . . <D n .

A method for packaging sheet metal parts made from an electrical steel strip or sheet to form a laminated core is disclosed. In order to achieve advantageous process conditions, it is proposed that when the hot-melt adhesive varnish layers are pressurized in the axial direction of the stacked sheet metal parts, they are pressurized multiple times by means of a pressure pulse in that the pressure pulse is exerted through either an impingement with pulse pressure or a relief of pulse pressure.

An actuator for a casting mold for producing a metal component has at least two electrodes in contact with the metal melt for generating a local, pulsing electric field in a metal melt present in the casting mold and for introducing a pulsing current into the metal melt.

The invention relates to a method for producing thermomechanically produced hot strip products in which a steel alloy is melted; the steel alloy is adjusted so that a recrystallization during the hot rolling is suppressed; the final rolling temperature is greater than 800° C.; the melted steel alloy is cast into slab ingots and after being heated to a temperature above Ac 3 , the slab ingots are hot rolled until they reach a desired degree of deformation and a desired strip thickness; after the rolling, the strip is cooled to room temperature and for hardening purposes, is briefly heated to a temperature >Ac3 and cooled again, characterized in that the heating takes place with a temperature increase of more than 5 K/s, more than 10 K/s, more than 50 K/s, or more than 100 K/s, and is kept at a desired target temperature for a period of 0.5 to 60 s before cooling to yield improved mechanical properties.

A device for applying a layer (to a front and/or rear side of a flat steel product includes a zinc alloy melt bath ( 11 ) (ZnAl; ZnAlMg) with an input side and an exit side, a stripping nozzle device with at least one gas nozzle for blowing off the front or rear side of the flat steel product with gas, the stripping nozzle device being arranged in the area of the exit side, and a water vapor device which is configured to emit gaseous water vapor and to provide a controlled water vapor atmosphere in the close range of the front and/or rear side of the flat steel product. The controlled water vapor atmosphere has an absolute local humidity which is greater than 1 g/m 3 and less than 300 g/m 3 , the absolute local humidity preferably being in the range of 2.71 g/m 3 to 50 g/m 3 .