Patents Assigned to voestalpine STAHL GmbH
  • Publication number: 20230023947
    Abstract: A method of producing a coated electrical strip includes hydrolyzing a surface of a rolled aluminum-alloyed electrical strip. A pretreatment layer containing an organosilicon compound is applied over the surface of the rolled aluminum-alloyed electrical strip. Subsequently, the rolled aluminum-alloyed electrical strip coated with the pretreatment layer is coated with a baking varnish layer.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 26, 2023
    Applicant: voestalpine Stahl GmbH
    Inventors: Ronald FLUCH, Roland BRAIDT
  • Patent number: 11558965
    Abstract: An apparatus and a method are disclosed for producing an electric terminal contact on a coated sheet, whose coating has at least one electric conductor path covered by an electrical insulation layer, in which apparatus and method a recess is produced extending through the insulation layer at least to the electrical conductor path and in this recess, an electrically conductive contact element is provided, one end of which is electrically connected to the conductor path and at the other end of which forms the electrical terminal contact. In order to increase the reproducibility, the proposal is made for the recess to be produced with the aid of a hollow needle, which is advanced in the direction toward the conductor path and which, as it is withdrawn from the recess, introduces an electrically conductive, viscous compound into this recess in order to produce the contact element.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: January 17, 2023
    Assignee: voestalpine Stahl GmbH
    Inventors: Peter Atzmüller, Roland Braidt, Bernhard Jakoby, Wolfgang Hilber, Johannes Sell, Herbert Enser
  • Publication number: 20220410314
    Abstract: A method for welding coated steel sheets, particularly steel sheets that are coated with an aluminum-silicon metallic coating layer, is provided. A configuration of two laser beams is provided, wherein the laser beams act on a weld pool that is to be formed, at least one laser beam rotates around a rotation axis so that the laser beams execute a movement relative to each other, and the laser beams are guided along a welding axis. In order to achieve a mixing of the weld pool, a defined stirring effect and a defined welding speed in relation to each other are adhered to, wherein a mathematically defined condition applies to the stirring effect.
    Type: Application
    Filed: November 26, 2020
    Publication date: December 29, 2022
    Applicant: voestalpine Stahl GmbH
    Inventor: Gerald BRUGGER
  • Patent number: 11536692
    Abstract: An apparatus and method for the non-destructive determination of the content of the magnetizable and/or non-magnetizable portion of a sample, in which the sample is provided in an air gap of a magnetically conductive yoke, an alternating magnetic field is generated by an alternating magnetic field strength of an excitation coil in the yoke, and first measurement data relating to the sample are collected using a measuring device which is inductively coupled to the yoke, and comparing the first measurement data to second measurement data relating to a reference sample, wherein the same alternating magnetic field strength or the same alternating magnetic field is applied to both the reference sample and the sample and the difference between the two collected sets of measurement data is included as a measure in the determination of the content for the magnetizable and/or non-magnetizable content portion of the sample.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: December 27, 2022
    Assignee: VOESTALPINE STAHL GMBH
    Inventors: Stefan Schuster, Norbert Gstöttenbauer, Christoph Thaler, Daniel Wöckinger
  • Patent number: 11529796
    Abstract: A coated sheet metal strip includes a rolled sheet metal strip having a first flat side and a second flat side. A first layer over the first flat side includes a carrier layer. The carrier layer contains a reaction accelerator for an adhesive and stores the reaction accelerator on a physical basis. A second layer, including the adhesive, is applied over the second flat side. The second layer is free of the reaction accelerator or any reaction accelerator.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: December 20, 2022
    Assignee: VOESTALPINE STAHL GMBH
    Inventor: Ronald Fluch
  • Patent number: 11479830
    Abstract: A method for treating converter slag for the purpose of recirculating iron, wherein a converter slag is brought into contact with oxygen in such a way that by means of turbulence, the slag is mixed, the iron and iron oxide components that are present are oxidized, and the slag is then allowed to stand in the vessel or a vessel until a segregation into a solidifying, silicate and phosphorus-rich first fraction and an underlying liquid iron oxide-rich second fraction has taken place, with the converter slag that is used being mixed with a partial flow from the iron oxide-rich second fraction in such a way that the total FeO content of the slag that is to be treated with oxygen is over 35% by weight, thus enabling the segregation into two fractions.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: October 25, 2022
    Assignee: voestalpine Stahl GmbH
    Inventor: Herbert Schmid
  • Patent number: 11473160
    Abstract: A method for producing a cold-rolled flat steel product coated with a metallic anticorrosion layer includes producing a steel melt containing in addition to iron and unavoidable impurities (in % by wt.): C: 0.01-0.35%, Mn: 1-4%, Si: 0.5-2.5%, Nb: to 0.1%, Ti: 0.015-0.1%, P: up to 0.1%, Al: to 0.15%, S: up to 0.01%, N: up to 0.1%, and optionally one or more elements from a group of rare earth metals. The method further includes casting the steel melt to give a preliminary product, hot-rolling the preliminary product to give a hot strip, coiling the hot strip to give a coil, annealing the hot strip, cold-rolling the annealed hot strip to give a cold-rolled flat steel product, finally annealing the cold-rolled flat steel product, and applying a metal anticorrosion layer based on zinc by electrolytic galvanization or hot dip galvanization of the cold-rolled and finally annealed flat steel product.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: October 18, 2022
    Assignee: VOESTALPINE STAHL GMBH
    Inventors: Klemens Mraczek, Andreas Muhr, Bernhard Haneder
  • Patent number: 11459628
    Abstract: The invention relates to a method for producing a sheet steel component by means of a press hardening or form hardening process, the sheet steel component being produced by virtue of the fact that a sheet bar composed of at least one region made of a highly hardenable carbon/manganese/boron steel and at least one dual-phase steel is cold-formed, then heated, and then quenched in a cooling press or a sheet bar composed of at least one region made of a highly hardenable carbon/manganese/boron steel and at least one region made of a dual-phase steel is heated to a temperature above the austenitization temperature of the highly hardenable steel material and is then formed into the sheet steel component in a single stroke or in a plurality of strokes in a forming and cooling press, wherein as a softer material and as a partner for the highly hardenable carbon/manganese/boron steel, a dual-phase steel is used, whose Ac3 value is increased until at the required annealing temperatures, with the austenitization of the
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 4, 2022
    Assignee: voestalpine Stahl GmbH
    Inventors: Johannes Rehrl, Thomas Kurz, Andreas Pichler
  • Publication number: 20220145414
    Abstract: The invention relates to a method for producing hot-rolled hot strip products in which a steel alloy is melted; the melted steel alloy is cast into slab ingots and after being heated to a temperature above Ac3, the slab ingots are hot rolled until they reach a desired degree of deformation and a desired strip thickness; the rolling is performed above the recrystallization temperature of the alloy; 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.
    Type: Application
    Filed: December 18, 2019
    Publication date: May 12, 2022
    Applicant: voestalpine Stahl GmbH
    Inventors: Wolfgang ERNST, Helmut SPINDLER
  • Patent number: 11292028
    Abstract: In a process for producing a lacquer-coated electric sheet strip a first insulation lacquer layer is applied wet across at least one side of an electric sheet strip. Across the wet first insulation lacquer layer a wet second insulation lacquer layer is applied. In a drying oven drying of the first insulation lacquer layer and the second insulation lacquer layer is performed.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: April 5, 2022
    Assignee: VOESTALPINE STAHL Gmbh
    Inventors: Ronald Fluch, Timothy Keppert
  • Patent number: 11236414
    Abstract: High strength galvannealed steel sheet having, a) a composition consisting of (in wt. %): C 0.10-0.2, Mn 2.0-3.0, Si 0.2-0.5, Cr 0.1-0.7, Ti 0.01-0.07, Al?0.2, Nb<0.05, Mo<0.1, optionally B 0.001-0.005, balance Fe apart from impurities, b) a multiphase microstructure comprising (in vol. %) retained austenite 4-20, martensite 5-25, bainitic ferrite ?10, polygonal ferrite ?10, balance bainite+tempered martensite 50-90, c) a tensile strength (Rm) 1180-1300 MPa, a yield strength (Rp0.2) 800-970 MPa, an elongation (A50) ?8%, or an elongation (A80) ?6%, and d) a bendability value Ri/t of ?4 for a sample having the size of 35 mm×100 mm, wherein Ri is the bending radius in mm and t is the thickness in mm of the steel sheet.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: February 1, 2022
    Assignees: VOESTALPINE STAHL GMBH, TOYOTA MOTOR EUROPE NV/SA
    Inventors: Thomas Hebesberger, Florian Winkelhofer, Markus Anzenberger, Edip Oze Arman
  • Publication number: 20220018008
    Abstract: 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 Ac3, 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.
    Type: Application
    Filed: December 18, 2019
    Publication date: January 20, 2022
    Applicant: voestalpine Stahl GmbH
    Inventors: Wolfgang ERNST, Helmut SPINDLER
  • Patent number: 11225038
    Abstract: A method for manufacturing a semifinished product or component is disclosed in which a metal support embodied as a split strip is covered with at least one prepreg containing a thermally cross-linkable thermosetting matrix with endless fibers, the thermosetting matrix of the prepreg is pre-cross-linked by means of heating, and the metal support covered with the pre-cross-linked prepreg is formed into a semifinished product or component by means of roll forming. In order to enable plastic deformation in fiber-reinforced regions of the metal support, it is proposed that during the pre-cross-linking of the thermosetting matrix of the prepreg, its matrix is transferred into a viscosity state that is higher than its minimum viscosity and prior to reaching its gel point, the prepreg is formed together with the metal support.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: January 18, 2022
    Assignees: voestalpine Stahl GmbH, voestalpine Metal Forming GmbH
    Inventors: Carola Eyssell, Rüdiger Heinritz, Reiner Kelsch, Gerhard Mayrhofer, Christian Rouet, Johannes Riegler
  • Publication number: 20220010404
    Abstract: 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 Ac3, 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, with 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.
    Type: Application
    Filed: December 18, 2019
    Publication date: January 13, 2022
    Applicant: voestalpine Stahl GmbH
    Inventors: Wolfgang ERNST, Helmut SPINDLER
  • Publication number: 20220002847
    Abstract: A medium manganese cold-rolled steel intermediate product having an improved fts value is disclosed, the alloy having a carbon fraction within the range 0.003 wt %<C<0.12 wt %, a manganese fraction (Mn) within the range 3.5 wt %<Mn<12 wt %, a silicon fraction (Si) and/or an aluminium fraction (Al) as alloy fractions, where Si wt %+Al wt %<1, optionally further alloy fractions, optional microalloy fractions, in particular a titanium fraction (Ti) and/or a niobium fraction (Nb) and/or vanadium fraction (V), and the remainder of the alloy has iron (Fe) and unavoidable impurities of a melt. A method is also disclosed having the following step that is carried out after the cold-rolling step performing an intercritical box annealing process at a maximum annealing temperature of 684° C.?(517° C.*the carbon fraction in wt %).
    Type: Application
    Filed: July 4, 2019
    Publication date: January 6, 2022
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: DANIEL KRIZAN, Katharina STEINDEDER, Reinhold SCHNEIDER
  • Patent number: 11156512
    Abstract: A strain gauge and a metal strip having such a strain gauge, which has a first measuring grid, a second measuring grid, and a substrate on which these two measuring grids are positioned in a common plane. In order to enable achievement of an inexpensive strain gauge whose measurement results can be robustly compensated for in relation to a temperature disturbance variable, it is proposed that the multi-layer substrate have a metallic layer and an electrically insulating layer onto which electrically insulating layer these two measuring grids consisting of a piezoresistive material are printed.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: October 26, 2021
    Assignee: voestalpine Stahl GmbH
    Inventors: Gerald Ossberger, Norbert Gstöttenbauer, Bernhard Jakoby, Wolfgang Hilber, Johannes Sell, Herbert Enser
  • Patent number: 11124850
    Abstract: The en-bloc heat treatment of a manganese steel product whose alloy has a carbon fraction (C) in the following range 0.02?C?0.35% by weight, and a manganese content (Mn) in the following range of 3.5% by weight?Mn?6% by weight. The en-bloc annealing method has the following substeps: heating (E1) the steel product to a first holding temperature (T1) which is in the range of 820° C.±20° C., first holding (H1) of the steel product during a first holding period (?1) at the first holding temperature (T1), faster first cooling (A1) of the steel product to a second holding temperature (T2) which is in the range between 350° C. and 450° C., second holding (H2) of the steel product during a second holding period (?2) in the range of the second holding temperature (T2), performing a slower second cooling (A2).
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: September 21, 2021
    Assignee: VOESTALPINE STAHL GMBH
    Inventors: Philipp Kurnsteiner, Samek Ludovic, Friedrich Fureder-Kitzmuller, Enno Arrenholz
  • Patent number: 11107628
    Abstract: A coil and an electrical strip or electrical sheet with at least one heat-hardening hotmelt varnish, namely a baked enamel layer, provided on its flat sides, which has an epoxy resin base, at least one hardener, and at least one filler, are disclosed. In order to achieve a high storage stability and long-term temperature stability, the proposal is made for the filler of the baked enamel layer to have a metal carbonate, sulfate, sulfide, silicate, or phosphate or any mix of a plurality of these.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: August 31, 2021
    Assignee: voestalpine Stahl GmbH
    Inventors: Ronald Fluch, Roman Tiefenthaller
  • Patent number: 11090920
    Abstract: A continuous strip method for producing an electric strip laminate which is wound into a coil is proposed in which at least two electric strips are pressed against each other on their flat sides and are integrally bonded to form an electric strip laminate and in a further step, this electric strip laminate is wound into a coil. More particularly, a first electric strip is coated on at least one of its flat sides with a first thermally activatable hot melt adhesive lacquer, the first hot melt adhesive lacquer on the first electric strip is thermally activated, and then the electric strips are pressed against each other on their flat sides with the activated first hot melt adhesive lacquer layer between these flat sides and a second electric strip is supplied to this pressing process at a temperature below the activation temperature of the first hot melt adhesive lacquer layer on the first electric strip.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: August 17, 2021
    Assignee: voestalpine Stahl GmbH
    Inventors: Ronald Fluch, Carina Kern
  • Patent number: 11056637
    Abstract: A metal strip and a coil coating process for multilayer coating of an endless metal strip are disclosed in which a curable polymer primer is applied to a flat side of the metal strip with the aid of a roller application in order to form an electrically insulating primer layer, a curable polymer varnish is applied to this primer layer with the aid of a roller application and cured in order to form an electrically insulating varnish layer, and at least one electric conductor layer is printed at least in some areas between the primer layer and the varnish layer. In order to enable a stable and inexpensive electrical functionalization of a metal strip, it is proposed that an electrically polarizable layer be applied to at least some regions of the electric conductor layer and that the electric conductor layer and electrically polarizable layer be applied by means of a wet-on-wet process.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: July 6, 2021
    Assignee: voestalpine Stahl GmbH
    Inventors: Michaela Schatzl-Linder, Bernhard Jakoby, Wolfgang Hilber, Johannes Sell, Herbert Enser, Siegfried Bauer, Markus Krause