Patents by Assignee voestalpine STAHL GmbH
  • Publication number: 20160054282
    Abstract: A lance and a method determine reaction data of the course of a reaction, in which a reaction gas is top-blown by at least one lance onto a metallic melt in a metallurgical vessel and measured data are determined in this way, reaction data for the course of the reaction are determined as a function of these, where the lance for determining measured data blows out a gas which is conveyed separately from the reaction gas through at least one outlet opening of at least one measuring conduit. The lance for determining measured data blows out the gas which is conveyed separately from the reaction gas laterally through at least one outlet opening of at least one measuring conduit and the internal pressure of at least one gas bubble of this gas formed at this outlet opening of the respective measuring conduit is measured.
    Type: Application
    Filed: March 25, 2014
    Publication date: February 25, 2016
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Stefan SCHUSTER, Gunter LENGAUER, Harald PANHOFER
  • Publication number: 20160002746
    Abstract: A method for heat treating a manganese steel product whose alloy comprises: a carbon fraction (C) between 0.09 and 0.15 wt. %, and a manganese fraction (Mn) in the range of 3.5 wt. %?Mn?4.9 wt. %, the method comprising: performing a first annealing process (S4.1) with the substeps heating (E1) the steel product to a first holding temperature (T1), which lies above 780° C., holding (H1) the steel product during a first time period (?1) at the first holding temperature (T1), cooling (A1) the steel product, performing a second annealing process (S4.2) with the substeps heating (E2) the steel product to a holding temperature (T2), which lies above 630° C. and below 660° C., holding (H2) the steel product during a second time period (?2) at the holding temperature (T2), cooling (A2) the steel product.
    Type: Application
    Filed: December 20, 2013
    Publication date: January 7, 2016
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Enno Arenholz, Ludovic Samek
  • Patent number: 9228148
    Abstract: A method of producing shaped articles made from single-sidedly or double-sidedly galvanized steel sheet, starting from galvanized steel strip, at least one of the steps of the method being a transport operation, and in which, for protection from black-spot corrosion, a corrosion preventive oil is applied which comprises at least one phosphoric acid polyoxyalkylene ester.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 5, 2016
    Assignee: Voestalpine Stahl GmbH
    Inventors: Stephan Hüffer, Helmut Witteler, Achim Feβenbecker, Karl-Heinz Stellnberger, Martin Fleischanderl
  • Publication number: 20150298399
    Abstract: The invention relates to a method for producing a semi-finished product or component (2), in which a hardenable coating (6, 17) with fiber-reinforced plastic is applied to a metal carrier (3), particularly a metal sheet (4), and the coated metal carrier (3) is formed, particularly deep-drawn or bent, in a subsequent step to produce a semi-finished product or component (2). According to the invention, for an improved and cost-effective method, the metal carrier (3) is coated at most only in certain regions and is only subjected to the forming when the coating thereof (6, 17) has hardened to produce at least a block-resistant surface (12), the coated metal carrier (3) being formed such that the plastic changes in shape follow forming radii (21) and are produced substantially, preferably exclusively, in the coating-free regions (15) of the metal carrier.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 22, 2015
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Franz ANDROSCH, Carola EYSSELL, Bernhard STRAUSS, Christian WALCH
  • Patent number: 9138797
    Abstract: In a method for producing a structural part from an iron-manganese-stell sheet (1), a sheet-metal workpiece (2) is cold-formed in a forming die (3). The formed sheet-metal workpiece is heated to a temperature between 500° C. and 700° C. (4) and calibrated in a calibrating die (5).
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: September 22, 2015
    Assignee: VOESTALPINE STAHL GMBH
    Inventors: Ludovic Samek, Martin Peruzzi, Enno Arenholz
  • 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: 20150059935
    Abstract: The present invention relates to high strength cold rolled steel sheet suitable for applications in automobiles, construction materials and the like, specifically high strength steel excellent in formability. In particular, the invention relates to cold rolled steel sheets having a tensile strength of at least 780 MPa.
    Type: Application
    Filed: April 2, 2013
    Publication date: March 5, 2015
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Thomas Hebesberger, Daniel Krizan, Stefan Paul, Andreas Pichler
  • Publication number: 20150044502
    Abstract: Disclosed is a hot-dip galvanized steel sheet for stamping, which has excellent cold workability, has such satisfactory surface quality as to be free from unplating and other defects even in the absence of dedicated facilities, and ensures a strength of 1370 MPa or more after quenching even when cooled at a low rate. Also disclosed is a method effective for the produce of the hot-dip galvanized steel sheet for stamping. The hot-dip galvanized steel sheet for stamping comprises a base steel sheet and a hot-dip galvanized layer on a surface of the base steel sheet, in which the base steel sheet has a predetermined chemical composition and has a microstructure comprising equiaxed ferrite having an average aspect ratio of 4.0 or less and cementite and/or pearlite having an average major axis of grains of 20 ?m or less.
    Type: Application
    Filed: March 28, 2013
    Publication date: February 12, 2015
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), VOESTALPINE STAHL GMBH
    Inventors: Michiharu Nakaya, Tatsuya Asai, Andreas Pichler, Thomas Kurz
  • Patent number: 8900873
    Abstract: The invention relates to a method for continuously determining the concentration of at least one CN compound in an aqueous solution, wherein a carrier gas, for example compressed air, is introduced into the aqueous solution and the introduced carrier gas is fed at least partially to a gas analyzer, for example an HCN gas analyzer, the analysis data of which are considered in the determination of the concentration of the CN compound in the aqueous solution. In order to create advantageous method conditions, the temperature of the aqueous solution exposed to carrier gas is considered in the determination of the concentration of the CN compound.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: December 2, 2014
    Assignee: Voestalpine Stahl GmbH
    Inventors: Franz Parzermair, Leopold Moser, Manfred Naderer
  • Publication number: 20140214340
    Abstract: An apparatus and a method for detecting at least one periodically occurring defect on an object, in particular on a metal strip, in which at least one time signal is recorded from the moving object using a measuring method, the time signal is converted into a quality function using a stochastic method and one or more periodic signals in the time signal are inferred on the basis of this quality function in order to thereby detect at least one periodically occurring defect on the object. In order to obtain advantageous method properties, it is proposed to convert the time signal recorded by means of the measuring method, in particular the electromagnetic measuring method, into the quality function using a model-based estimation method, in particular using a maximum likelihood method.
    Type: Application
    Filed: July 16, 2012
    Publication date: July 31, 2014
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Thomas Pfatschbacher, Johann Reisinger, Norbert Gstoettenbauer, Stefan Schuster, Karsten Lothar Feiste
  • 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
  • Publication number: 20130316192
    Abstract: A method is shown for surface-treating a protectively coated substrate (1), more particularly steel strip, for the purpose of enhancing the strength of adhesion with an adhesive (10), where the at least partly multi-phase protective coat (2) comprises at least zinc and magnesium. In order to provide a particular suitability for adhesive bonding, it is proposed that the protective coat (2) be subjected to a pickling treatment, directed substantially at at least one intermetallic Zn—Mg phase (4) of the protective coat (2), with acidic pickle, more particularly acid.
    Type: Application
    Filed: January 5, 2012
    Publication date: November 28, 2013
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Karl-Heinz Stellnberger, Christian K. Riener, Gerald Luckeneder, Edmund Holzer, Harald Haslinger, Josef Hagler
  • Publication number: 20130248100
    Abstract: The invention relates to a method for connecting sheet metal parts (4) to form a laminated core (11), wherein sheet metal parts (4) are separated, in particular punched, from a sheet metal strip (2) that has, at least in some areas, a layer having curable polymer adhesive (12), and the sheet metal parts (4) are preliminarily connected to form a laminated core (11), the preliminary connection comprising plasticizing the adhesive (12) at least in some areas and joining the sheet metal parts (4) in order to connect the sheet metal parts by means of the plasticized adhesive (12) of at least one of the sheet metal parts (4), and in a subsequent step the laminated core (11) having preliminarily connected sheet metal parts (4) is subjected to a curing of the adhesive (12). In order to create an advantageous connection between the sheet metal parts, the plasticizing of the adhesive (12) comprises the introduction of a softener (16), in particular H2O.
    Type: Application
    Filed: November 4, 2011
    Publication date: September 26, 2013
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Martin Peruzzi, Ronald Fluch, Reinhold Stotz, Bernhard Strauss, Franz Dorninger
  • Patent number: 8522586
    Abstract: The invention relates to a method for producing a sheet metal component. A hot or cold strip is electrolytically coated or coated in a smelting bath and the thus coated hot or cold strip is subjected to a flexible rolling process. During said process, sheet metal having various thicknesses of the flexibly rolled steel strips are produced due to various rolling pressures. Said invention is characterized in that in accordance with the thickness of the sheet metal after being rolled in a flexible manner or in accordance with the rolling pressure during flexible rolling, either the coating whilst being coated has various thicknesses, and in accordance with the rolling pressure with increasing rolling pressure that is expected, the thickness of the coating is thicker and/or the coating prior to or after the flexible rolling is subjected to a mechanical or chemical surface treatment for adjusting the desired emissivity or heat absorption capacity.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: September 3, 2013
    Assignee: Voestalpine Stahl GmbH
    Inventor: Josef Faderl
  • Publication number: 20130213530
    Abstract: The invention relates to a process for conditioning the surface of hardened, corrosion-protected sheet-steel components; the steel plate is a steel plate that is covered with a metallic coating and is heated for hardening and is then quench hardened and after the hardening, oxides that are present on the corrosion protection coating due to the heating are removed; the component undergoes a slide grinding in order to condition the surface of the metallic covering or corrosion protection layer.
    Type: Application
    Filed: June 6, 2011
    Publication date: August 22, 2013
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Martin Rosner, Gregor Diesenreiter, Gerald Luckeneder, Robert Autengruber
  • Publication number: 20130125607
    Abstract: In a method for producing a structural part from an iron-manganese-stell sheet (1), a sheet-metal workpiece (2) is cold-formed in a forming die (3). The formed sheet-metal workpiece is heated to a temperature between 500° C. and 700° C. (4) and calibrated in a calibrating die (5).
    Type: Application
    Filed: November 12, 2012
    Publication date: May 23, 2013
    Applicant: VOESTALPINE STAHL GMBH
    Inventor: VOESTALPINE STAHL GMBH
  • Publication number: 20130028659
    Abstract: The invention relates to an apparatus and to a process for cohesively joining two plates (1 and 2) having differing melting points, one of which plates, the end plate (1), includes a light metal material, in particular aluminum material, and the other of which plates, the connecting plate (2), includes an iron and/or titanium material, wherein a coating (9) preferably on the basis of zinc or aluminum is provided at least partially on at least one of the abutting faces (3?, 3?) of the abutting edge (3) of the connecting plate (2) which extend inclined with respect to one another, in which process both plates (1 and 2) are joined together by braze welding so as to abut against one another along their common joint using an additional material (5) on the basis of light metal, in particular on the basis of aluminum.
    Type: Application
    Filed: April 12, 2011
    Publication date: January 31, 2013
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Alois Leitner, Roland Rechberger
  • Publication number: 20120279868
    Abstract: The invention relates to a method for manufacturing a steel strip with a cathodic corrosion protection coating, in which the steel strip is hot rolled and then cold rolled; the steel strip is subjected to an electrolytic galvanization and after the electrolytic galvanization, the steel strip is heat treated in a bell-type annealing furnace at temperatures of 250° C. to 350° C. for a period of 4 to 48 hours and this produces a zinc/iron layer.
    Type: Application
    Filed: September 13, 2010
    Publication date: November 8, 2012
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Johann Gerdenitsch, Josef Faderl
  • Publication number: 20120195795
    Abstract: The invention relates to a method for continuously determining the concentration of at least one CN compound in an aqueous solution, wherein a carrier gas, for example compressed air, is introduced into the aqueous solution and the introduced carrier gas is fed at least partially to a gas analyzer, for example an HCN gas analyzer, the analysis data of which are considered in the determination of the concentration of the CN compound in the aqueous solution. In order to create advantageous method conditions, the temperature of the aqueous solution exposed to carrier gas is considered in the determination of the concentration of the CN compound.
    Type: Application
    Filed: August 3, 2010
    Publication date: August 2, 2012
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Franz Parzermair, Leopold Moser, Manfred Naderer