Patents by Inventor Siegfried Kolnberger

Siegfried Kolnberger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
  • 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
  • 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
  • Publication number: 20190047032
    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: February 14, 2019
    Inventors: SIEGFRIED KOLNBERGER, JOHANNES HASLMAYR
  • Publication number: 20190048432
    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: February 14, 2019
    Inventors: JOHANNES HASLMAYR, SIEGFRIED KOLNBERGER, HARALD SCHWINGHAMMER, ANDREAS SOMMER, BENEDIKT TUTEWOHL
  • Publication number: 20180230568
    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: Application
    Filed: September 9, 2015
    Publication date: August 16, 2018
    Inventors: Christoph Wagner, Siegfried Kolnberger
  • Patent number: 9822436
    Abstract: The invention relates to a method for the production and removal of a temporary protective layer for a cathodic coating, particularly for the production of a hardened steel component with an easily paintable surface, wherein a steel sheet made of a hardenable steel alloy is subjected to a preoxidation, wherein said preoxidation forms a FeO layer with a thickness of 100 nm to 1,000 nm and subsequently a melt dip coating is conducted, wherein, during the melt dip coating, a zinc layer is applied having a thickness of 5 to 20 ?m, preferably 7 to 14 ?m, on each side, wherein the melt dip process and the aluminum content of the zinc bath is adjusted such that, during the melt dip coating, an aluminum content for the barrier layer results of 0.15 g/m2 to 0.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: November 21, 2017
    Assignee: voestalpine Stahl GmbH
    Inventors: Martin Peruzzi, Josef Faderl, Siegfried Kolnberger, Werner Brandstatter
  • Publication number: 20170321314
    Abstract: The invention relates to a method for producing an anti-corrosion coating for hardenable sheet steels, wherein at least two metal layers are deposited one after another onto the steel substrate; the one metal layer is a zinc layer or zinc-based layer and the other layer is a layer composed of a metal that forms baser intermetallic phases with Zn or Fe and has a higher oxidation potential than Zn, namely Ni, Cu, Co, Mn, or Mo, or a layer based on these metals; and an anti-corrosion coating for hardenable sheet steels.
    Type: Application
    Filed: November 4, 2015
    Publication date: November 9, 2017
    Inventors: Siegfried Kolnberger, Ernst Commenda
  • Publication number: 20170218473
    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 Hank 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: Application
    Filed: July 21, 2015
    Publication date: August 3, 2017
    Inventors: Michael Haslmayr, Siegfried Kolnberger, Thomas Kurz, Leopold Stegfellner, Andreas Sommer
  • Patent number: 9090951
    Abstract: The invention relates to a method for the production of a hardened component made of a hardenable steel, wherein the steel strip is exposed to a temperature increase in an oven, and is thus exposed to an oxidizing treatment such that a surface oxide layer is created, and subsequently a coating using a metal or a metal alloy is carried out. The strip is heated and at least partially austenitized for producing an at least partially hardened component, and subsequently cooled and thereby hardened. The invention also relates to a steel strip produced according to said method.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 28, 2015
    Assignee: VOESTALPINE STAHL GMBH
    Inventors: Werner Brandstätter, Siegfried Kolnberger, Thomas Kurz, Martin Peruzzi, Johann Strutzenberger, Thomas Manzenreiter
  • Publication number: 20150183051
    Abstract: A method for producing a component with a sandwich structure, in which at least one essentially flat top layer is produced from a ferrous material, a structure is introduced into an essentially flat intermediate layer composed of a ferrous material, contact regions of the intermediate layer are at least partially galvanized, the at least one top layer and the intermediate layer are superposed to form a composite so that the contact regions rest against the top layer, and the composite is then press hardened. The invention produces an easily recyclable component with a sandwich structure, which has good rigidity and strength properties.
    Type: Application
    Filed: July 15, 2013
    Publication date: July 2, 2015
    Inventors: Andreas Sommer, Siegfried Kolnberger, Thomas Kurz, Karl Michael Radlmayr, Martin Rosner
  • Publication number: 20140027026
    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: Application
    Filed: December 22, 2011
    Publication date: January 30, 2014
    Applicant: voestalpine Stahl GmbH
    Inventors: Harald Schwinghammer, Andreas Sommer, Siegfried Kolnberger, Martin Rosner, Thomas Kurz
  • Publication number: 20140020795
    Abstract: The invention relates to a method for producing a hardened steel component with a coating composed of zinc or a zinc alloy; a blank is stamped out of a sheet coated with the zinc or zinc alloy, the stamped-out blank is heated to a temperature ?Ac3 and if need be, kept at this temperature for a predetermined time in order to induce the formation of austenite, and then the heated blank is transferred to a forming die, is formed in the forming die, and is cooled at a speed that is greater than the critical hardening speed and thus hardened; 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 >15K/s.
    Type: Application
    Filed: December 22, 2011
    Publication date: January 23, 2014
    Applicant: Voestalpine Stahl GmbH
    Inventors: Harald Schwinghammer, Andreas Sommer, Siegfried Kolnberger, Martin Rosner, Thomas Kurz
  • Patent number: 8181331
    Abstract: The invention relates to a method for producing hardened structural parts from sheet steel. The method includes shaping at least one shaped part made of sheet steel provided with a cathodic corrosion protection coating, performing any required final trim of the shaped part and possibly any required punching, or the creation of a perforation pattern, subsequently heating the shaped part, at least over partial areas, under the admission of atmospheric oxygen to a temperature which permits austenizing of the steel material, and thereafter transferring the structural part to a mold-hardening tool and performing mold-hardening in the mold-hardening tool, wherein the structural part is cooled by the contact with and pressing by the mold-hardening tool and is hardened thereby.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: May 22, 2012
    Assignees: voestalpine Automotive GmbH, voestalpine Stahl GmbH
    Inventors: Werner Brandstätter, Josef Faderl, Martin Fleischanderl, Siegfried Kolnberger, Gerald Landl, Anna Elisabeth Raab, Robert Vehof, Wolfgang Stall
  • Patent number: 8021497
    Abstract: The invention relates to a method for producing a hardened steel part having a cathodic corrosion protection, whereby a) a coating is applied to a sheet made of a hardenable steel alloy in a continuous coating process; b) the coating is essentially comprised of zinc; c) the coating additionally contains one or more oxygen-affine elements in a total amount of 0.1% by weight to 15% by weight with regard to the entire coating; d) the coated steel sheet is then, at least in partial areas and with the admission of atmospheric oxygen, brought to a temperature necessary for hardening and is heated until it undergoes a microstructural change necessary for hardening, whereby; e) a superficial skin is formed on the coating from an oxide of the oxygen-affine element(s), and; f) the sheet is shaped before or after heating, and; g) the sheet is cooled after sufficient heating, whereby the cooling rate is calculated in order to achieve a hardening of the sheet alloy.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: September 20, 2011
    Assignee: voestalpine Stahl GmbH
    Inventors: Martin Fleischanderl, Siegfried Kolnberger, Josef Faderl, Gerald Landl, Anna Elisabeth Raab, Werner Brandstätter
  • Publication number: 20110139308
    Abstract: The invention relates to a method for the production and removal of a temporary protective layer for a cathodic coating, particularly for the production of a hardened steel component with an easily paintable surface, wherein a steel sheet made of a hardenable steel alloy is subjected to a preoxidation, wherein said preoxidation forms a FeO layer with a thickness of 100 nm to 1,000 nm and subsequently a melt dip coating is conducted, wherein, during the melt dip coating, a zinc layer is applied having a thickness of 5 to 20 ?m, preferably 7 to 14 ?m, on each side, wherein the melt dip process and the aluminum content of the zinc bath is adjusted such that, during the melt dip coating, an aluminum content for the barrier layer results of 0.15 g/m2 to 0.
    Type: Application
    Filed: January 30, 2008
    Publication date: June 16, 2011
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Martin Peruzzi, Josef Faderl, Siegfried Kolnberger, Werner Brandstatter
  • Patent number: 7938949
    Abstract: The invention relates to a method for producing a hardened profiled structural part from a hardenable steel alloy with cathodic corrosion protection. The method includes applying a coating to a sheet made of a hardenable steel alloy, wherein the coating comprises zinc, and the coating further comprises one or several elements with affinity to oxygen in a total amount of 0.1 weight-% to 15 weight-% in relation to the total coating. After applying the coating, the coated sheet steel is roller-profiled in a profiling device, so that the sheet tape is formed into a roller-formed profiled strand. Thereafter, the coated sheet steel is brought, at least in parts and with the admission of atmospheric oxygen, to a temperature required for hardening and is heated to a structural change required for hardening. A skin made of an oxide of the element(s) with affinity to oxygen is formed on the surface of the coating.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: May 10, 2011
    Assignee: voestalpine Stahl GmbH
    Inventors: Werner Brandstatter, Herbert Eibensteiner, Martin Fleischanderl, Josef Faderl, Gerald Landl, Anna Elisabeth Raab, Siegfried Kolnberger
  • Publication number: 20110076477
    Abstract: The invention relates to a method for the production of a hardened component made of a hardenable steel, wherein the steel strip is exposed to a temperature increase in an oven, and is thus exposed to an oxidizing treatment such that a surface oxide layer is created, and subsequently a coating using a metal or a metal alloy is carried out. The strip is heated and at least partially austenitized for producing an at least partially hardened component, and subsequently cooled and thereby hardened. The invention also relates to a steel strip produced according to said method.
    Type: Application
    Filed: December 18, 2008
    Publication date: March 31, 2011
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Werner Brandstätter, Siegfried Kolnberger, Thomas Kurz, Martin Peruzzi, Johann Strutzenberger, Thomas Manzenreiter
  • Publication number: 20110045316
    Abstract: The invention relates to a method for producing a hardened profiled structural part from a hardenable steel alloy with cathodic corrosion protection. The method includes applying a coating to a sheet made of a hardenable steel alloy, wherein the coating comprises zinc, and the coating further comprises one or several elements with affinity to oxygen in a total amount of 0.1 weight-% to 15 weight-% in relation to the total coating. After applying the coating, the coated sheet steel is roller-profiled in a profiling device, so that the sheet tape is formed into a roller-formed profiled strand. Thereafter, the coated sheet steel is brought, at least in parts and with the admission of atmospheric oxygen, to a temperature required for hardening and is heated to a structural change required for hardening. A skin made of an oxide of the element(s) with affinity to oxygen is formed on the surface of the coating.
    Type: Application
    Filed: November 1, 2010
    Publication date: February 24, 2011
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Werner BRANDSTÄTTER, Herbert EIBENSTEINER, Martin FLEISCHANDERL, Josef FADERL, Gerald LANDL, Anna Elisabeth RAAB, Siegfried KOLNBERGER