Patents by Assignee voestalpine STAHL GmbH

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
Issued: December 2, 2014
Assignee: Voestalpine Stahl GmbH
Inventors: Franz Parzermair, Leopold Moser, Manfred Naderer
Application 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
Issued: July 31, 2014
Assignee: VOESTALPINE STAHL GMBH
Inventors: Thomas Pfatschbacher, Johann Reisinger, Norbert Gstoettenbauer, Stefan Schuster, Karsten Lothar Feiste
Application 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
Issued: January 30, 2014
Assignee: voestalpine Stahl GmbH
Inventors: Harald Schwinghammer, Andreas Sommer, Siegfried Kolnberger, Martin Rosner, Thomas Kurz
Application 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
Issued: January 23, 2014
Assignee: Voestalpine Stahl GmbH
Inventors: Harald Schwinghammer, Andreas Sommer, Siegfried Kolnberger, Martin Rosner, Thomas Kurz
Application 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
Issued: November 28, 2013
Assignee: VOESTALPINE STAHL GMBH
Inventors: Karl-Heinz Stellnberger, Christian K. Riener, Gerald Luckeneder, Edmund Holzer, Harald Haslinger, Josef Hagler
Application 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
Issued: September 26, 2013
Assignee: 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
Issued: September 3, 2013
Assignee: Voestalpine Stahl GmbH
Inventor: Josef Faderl
Application 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
Issued: August 22, 2013
Assignee: VOESTALPINE STAHL GMBH
Inventors: Martin Rosner, Gregor Diesenreiter, Gerald Luckeneder, Robert Autengruber
Application 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
Issued: May 23, 2013
Assignee: VOESTALPINE STAHL GMBH
Inventor: VOESTALPINE STAHL GMBH
Application 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
Issued: January 31, 2013
Assignee: VOESTALPINE STAHL GMBH
Inventors: Alois Leitner, Roland Rechberger
Application 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
Issued: November 8, 2012
Assignee: VOESTALPINE STAHL GMBH
Inventors: Johann Gerdenitsch, Josef Faderl
Application 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
Issued: August 2, 2012
Assignee: VOESTALPINE STAHL GMBH
Inventors: Franz Parzermair, Leopold Moser, Manfred Naderer
Application 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
Issued: May 31, 2012
Assignees: 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
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
Issued: 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
Application number: 20110308673
Abstract: A hot-rolled austenitic manganese steel strip having a chemical composition in percent by weight of 0.4%?C?1.2%, 12.0%?Mn?25.0%, P?0.01% and Al?0.05% has a product of elongation at break in % and tensile strength in MPa of above 65,000 MPa %, in particular above 70,000 MPa %. A cold-rolled austenitic manganese steel strip having the same chemical composition achieves a product of elongation at break in % and tensile strength in MPa of above 75,000 MPa %, in particular above 80,000 MPa %.
Type: Application
Filed: May 11, 2011
Issued: December 22, 2011
Assignee: voestalpine Stahl GmbH
Inventors: Reinhold Schneider, Ludovic Samek, Enno Arenholz, Klemens Mraczek, Mario Hartl
Application number: 20110297292
Abstract: The invention relates to a method for producing an electric steel strip, in particular an iron oxide-coated steel strip for use as electric sheet steel for the electrical industry; the steel strip is fed in a continuous process to a closed treatment chamber; the electric steel is conveyed into the treatment chamber at a temperature between 450° C. and 550° C. and is acted on there with compressed air and an oxygen concentration of between 0.05% and 0.2% oxygen, measured in the entire furnace chamber atmosphere; and the dew point of water is set to below ?10° C. and the furnace chamber atmosphere is a reducing atmosphere; the invention also relates to the electric sheet steel and its use.
Type: Application
Filed: October 23, 2009
Issued: December 8, 2011
Assignee: VOESTALPINE STAHL GMBH
Inventors: Jochen Bogner, Franz Citroni, Gerald Kasberger
Application number: 20110272285
Abstract: The invention relates to a method for depositing chromium and/or chromium alloys on metals, and particularly on sheet steel, wherein an alloy layer is electrolytically deposited on the metal from a solution containing chromium ions and/or chromium ions and further metal ions such as Zn, Cd, In, Pb, Bi, Mo, Cu, Fe, Ni, Co, Mn, Al, Sb, Ag, Sn, Mg, wherein chromium hydroxide precipitated from a chromium (III) solution is used for regenerating the electrolyte solution using chromium (III) ions.
Type: Application
Filed: September 30, 2009
Issued: November 10, 2011
Assignee: VOESTALPINE STAHL GMBH
Inventors: Johann Gerdenitsch, Alexander Tomandl
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
Issued: September 20, 2011
Assignee: voestalpine Stahl GmbH
Inventors: Martin Fleischanderl, Siegfried Kolnberger, Josef Faderl, Gerald Landl, Anna Elisabeth Raab, Werner Brandstätter
Application 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
Issued: June 16, 2011
Assignee: VOESTALPINE STAHL GMBH
Inventors: Martin Peruzzi, Josef Faderl, Siegfried Kolnberger, Werner Brandstatter
Application number: 20110132052
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: Application
Filed: January 31, 2008
Issued: June 9, 2011
Assignee: Voestalpine Stahl GmbH
Inventor: Josef Faderl
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