Patents by Assignee voestalpine STAHL GmbH

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
Publication number: 20120132327
Abstract: Disclosed is a high strength steel sheet having excellent hydrogen embrittlement resistance. The steel sheet has a tensile strength of 1180 MPa or more, and satisfies the following conditions: with respect to an entire metallographic structure thereof, bainite, bainitic ferrite and tempered martensite account for 85 area % or more in total; retained austenite accounts for 1 area % or more; and fresh martensite accounts for 5 area % or less (including 0 area %).
Type: Application
Filed: May 28, 2010
Publication date: May 31, 2012
Applicants: VOESTALPINE STAHL GMBH, Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
Inventors: Yoichi Mukai, Kouji Kasuya, Michiharu Nakaya, Michitaka Tsunezawa, Fumio Yuse, Junichiro Kinugasa, Sandra Traint, Andreas Pichler
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