Patents Assigned to voestalpine STAHL GmbH
  • 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
  • Publication number: 20210189513
    Abstract: The invention relates to a method for press hardening sheet steel components in which a blank is detached from a sheet steel band composed of a hardenable steel alloy and the blank is then austenitized, in that it is heated to a temperature greater than Ac3 and is then inserted into a forming tool and formed in the forming tool, and during the forming, is cooled at a speed greater than the critical hardening speed, characterized in that in order to inhibit microcracks of the second type from being produced during the forming and hardening process in the sheet metal blanks that are to be formed, oxygen is supplied adjacent to the positive radii and/or drawing edges; the invention also relates to a device for performing this method.
    Type: Application
    Filed: February 7, 2017
    Publication date: June 24, 2021
    Applicants: voestalpine Stahl GmbH, voestalpine Metal Forming GmbH
    Inventors: Johannes HASLMAYR, Siegfried KOLNBERGER, Harald SCHWINGHAMMER, Andreas SOMMER, Benedikt TUTEWOHL
  • Publication number: 20210162454
    Abstract: A process for producing a coated electrical steel strip includes application of a pretreatment layer over a first flat side of a rolled electrical steel strip. The layer thickness of the pretreatment layer is in the range from 10 nm to 100 nm, in particular from 20 nm to 50 nm. The rolled electrical steel strip which has been coated with the pretreatment layer is then coated with an insulating lacquer layer over the pretreatment layer. The insulating lacquer layer is applied by roll application using a roll and no deliberate drying and/or crosslinking of the pretreatment layer is carried out after application of the pretreatment layer and before coating with the insulating lacquer layer.
    Type: Application
    Filed: June 14, 2019
    Publication date: June 3, 2021
    Applicant: voestalpine Stahl GmbH
    Inventors: Bernhard STRAUSS, Ronald FLUCH, Roman TIEFENTHALLER
  • Publication number: 20210146657
    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: Application
    Filed: April 12, 2019
    Publication date: May 20, 2021
    Applicant: voestalpine Stahl GmbH
    Inventor: Ronald FLUCH
  • Patent number: 10974469
    Abstract: A method for manufacturing a semifinished product or part is disclosed in which a metal support embodied as a metal sheet or blank 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 part by means of deep drawing or stretch deep drawing. 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: April 13, 2021
    Assignee: voestalpine Stahl GmbH
    Inventors: Carola Eyssell, Rüdiger Heinritz, Reiner Kelsch, Gerhard Mayrhofer, Christian Rouet, Johannes Riegler
  • Publication number: 20210017617
    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 a dual-phase steel is cold-formed, then heated, and then quenched in a cooling press or a sheet bar composed 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 a dual-phase steel is used, whose Ac3 value is increased until at the required annealing temperatures, only a partial austenitization of the dual-phase steel takes place so that when loaded into the cooling press, the dual-phase steel has a ferritic matrix, and in addition to this, austenite is present.
    Type: Application
    Filed: December 21, 2018
    Publication date: January 21, 2021
    Applicant: voestalpine Stahl GmbH
    Inventors: Andreas Pichler, Thomas Kurz, Johannes Rehrl
  • Patent number: 10836139
    Abstract: A three-layered composite has the form of a metal sheet or strip. A first core layer having a first steel material forms a composite central layer. A second plating layer has a second steel material different from the first steel material. A third plating layer has a third steel material different from the first steel material. The second and third plating layers are roll-plated onto opposite sides of the core layer and form the outer two composite layers. While the composite thickness remains the same, the first steel material thickness varies over the width of the composite. The first steel material extends, and can be press-hardened, continuously over the entire width of the composite material. The second and/or third steel materials, in the plating-layer thickness, follow the variation of the core-layer thickness in opposite directions and have a carbon content lower than that of the first steel material.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: November 17, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Christoph Etzlstorfer, Alois Leitner, Reinhard Hackl
  • Patent number: 10829840
    Abstract: A steel sheet for hot pressing includes in a chemical composition, in percent by mass, C of 0.1% to 0.4%, Si of greater than 0% to 2.0%, Mn of 0.5% to 3.0%, P of greater than 0% to 0.015%, S of greater than 0% to 0.01%, B of 0.0003% to 0.01%, N of greater than 0% to 0.05%, Al in a content of 2×[N]% to 0.3% at a Si content of greater than 0.5% to 2.0%; or Al in a content of (0.20+2×[N]?0.40×[Si]N)% to 0.3% at a Si content of 0% to 0.5%, where [N] and [Si] are contents of N and Si, respectively, in mass percent, with the remainder being iron and inevitable impurities, where contents of Ti, Zr, Hf, and Ta, of the inevitable impurities, are each controlled to 0.005% or lower. The steel sheet includes nitride-based inclusions with an equivalent circle diameter of 1 ?m or more in a number density of 0.10 per square millimeter.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: November 10, 2020
    Assignees: voestalpine Stahl GmbH, Kobe Steel, Ltd.
    Inventors: Toshio Murakami, Junya Naitou, Keisuke Okita, Shushi Ikeda, Shinji Sato, Andreas Pichler, Thomas Kurz
  • Patent number: 10814367
    Abstract: The present invention relates to an apparatus for tempering hot articles, in particular an apparatus for homogeneous, contactless tempering of primarily non-endless surfaces that are to be tempered; the tempering apparatus has at least one tempering blade or a tempering cylinder; the tempering blade or tempering cylinder is embodied as hollow and has a tempering blade nozzle edge or a plurality of tempering cylinders arranged in a row; in the nozzle edge at least one nozzle is provided, which is aimed at an article to be tempered; and at least seven tempering blades are arranged in such a way that the flow pattern on the surface to be tempered forms a honeycomb-like structure; and to a method therefor.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: October 27, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Markus Brummayer, Kurt Etzelsdorfer
  • Publication number: 20200325552
    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: Application
    Filed: December 18, 2018
    Publication date: October 15, 2020
    Applicant: voestalpine Stahl GmbH
    Inventors: Klemens Mraczek, Andreas Muhr, Bernhard Haneder
  • Patent number: 10755842
    Abstract: A method for producing an electric strip laminate wound into a coil is disclosed, in which at least two metallic electric strips that are electrically insulated from each other are integrally bonded to form an electric strip laminate and in another step, are wound into a coil. In order to ensure a reproducible method, the invention proposes that the electrical strips, which are each electrically insulated on at least one flat side with a baked enamel layer, be joined to each other by means of baked enamel layers facing each other and be integrally bonded to form an electric strip laminate by activating the chemical cross-linking of the two baked enamel layers.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: August 25, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Carina Kern, Ronald Fluch
  • Patent number: 10640838
    Abstract: The invention relates to a method for producing a hardened, steel component with regions of different hardness and/or ductility; a blank is stamped out and either heated in some regions to a temperature ?Ac3, and then transferred to a forming die, is formed, and is cooled at a speed that is greater than the critical hardening speed and thus hardened or is cold formed into the finished shape and the formed blank is heated in some regions to a temperature >Ac3 and then transferred to a hardening die and is hardened at a speed greater than the critical hardening speed; the steel material is adjusted in a transformation-delaying fashion so that a quench hardening through transformation of austenite into martensite takes place at a forming temperature that lies in the range from 450° C. to 700° C.; after the heating and before the forming, an active cooling takes place at >15 K/s.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: May 5, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Harald Schwinghammer, Andreas Sommer, Siegfried Kolnberger, Martin Rosner, Thomas Kurz
  • Patent number: 10612108
    Abstract: A method for heating a blank or a preformed steel sheet component for hot forming and/or quench hardening purposes. In at least some regions, the heating is carried out to a temperature above AC3; the heating of the blank is embodied as a rapid heating and to this end, the blank is heated in a first zone at an average heating rate of >25 K/s up to about 600° C. and above this temperature, is heated at an average heating rate of >10 K/s up to a maximum of the AC3 temperature and then is transferred to a second zone in which the blank that has been preheated in the first zone is heated in at least some regions to temperatures greater than AC3, in particular >850° C., with the heating rate in the second zone being >10 K/s. The invention also relates to a device for carrying out the method.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: April 7, 2020
    Assignee: voestalpine Stahl GmbH
    Inventors: Michael Haslmayr, Siegfried Kolnberger, Thomas Kurz, Leopold Stegfellner, Andreas Sommer
  • Publication number: 20200086343
    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: Application
    Filed: March 16, 2018
    Publication date: March 19, 2020
    Applicant: voestalpine Stahl GmbH
    Inventors: Ronald FLUCH, Timothy KEPPERT
  • Publication number: 20190378969
    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-in-wet process.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 12, 2019
    Applicant: Voestalpine Stahl GmbH
    Inventors: Michaela SCHATZL-LINDER, Bernhard JAKOBY, Wolfgang HILBER, Johannes SELL, Herbert ENSER, Siegfried BAUER, Markus KRAUSE
  • Patent number: 10472696
    Abstract: A method for producing a hardened sheet steel, in particular a sheet steel that is coated with a metallic anti-corrosion layer; the sheet steel is first heated to an austenitization temperature and the austenite transformation is completed and then the sheet steel is pre-cooled to a temperature that lies above the transformation temperature of the austenite to other phases and is then transferred to a press-hardening die and in the press-hardening die, is shaped and, for hardening purposes, is quenched; for pre-cooling purposes, the blank is blasted in at least some areas or zones with dry ice, dry snow, or a gas flow containing dry ice particles.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: November 12, 2019
    Assignee: voestalpine Stahl GmbH
    Inventors: Christoph Wagner, Siegfried Kolnberger