Thyssenkrupp Steel Europe Ag

Thyssen Krupp Ag

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Outokumpu Nirosta Gmbh

Cerobear Gmbh

Marc Blumenau

Janko Banik

Rudolf Schoenenberg

Christopher Gusek

Oliver Moll

Maria Köyer

Manuela Ruthenberg

Fred Jindra

Martin Norden

Michael Peters

Frank Eisner

Jens Wemhoener

Manfred Meurer

Hans-Joachim Krautschick

Christian Klatt

Jens Kondratiuk

Friedhelm Macherey

Wilhelm Warnecke

Sabine Zeizinger

Tobias Lewe

Thiemo Wuttke

Tobias Denner

Jennifer Schulz

Hans-Joachim Heiler

Florian Spelz

Karsten Machalitza

Axel Schrooten

Dirk Czupryna

Joerg Adler

Jörg Adler

Klaus Josef Peters

Heike Heymer

Michael Ullmann

Bert-Reiner Willeke

Jens Wemhoner

Alfred Peitz

Gerd Jendrischik

Joerg Schulte

Sridhar Palepu

Rudolf Schönenberg

Rudolf Schonenberg

Jörg Steinebrunner

Andreas Westerfeld

Oliver Brehm

Joachim Hulstrung

Werner Högner

Heinrich Meyring

Matthias Dahlem

Markus Kovac

Bert-Heiner Willeke

Joachim Huelstrung

Udo Zocher

Rudolf SCHÖNENBERG

Jörg Schulte

Jens WEMHÖNER

Joachim HÜLSTRUNG

Joerg Steinebrunner

Christian Schmidt

Roger Nüssen

Erhard Klemm

Sahin Cengiz

A cold-rolled and recrystallization-annealed flat steel product may include a ferritic microstructure, which possesses optimized formability and suitability for a wide variety of applications, including painting, for example. The flat steel product may include a steel comprising (in percent by weight): C: 0.0001%-0.003%, Si: 0.001%-0.025%, Mn: 0.05%-0.20%, P: 0.001%-0.015%, Al: 0.02%-0.055%, Ti: 0.01%-0.1%. The steel may further include at least one of Cr: 0.001%-0.05%, V: up to 0.005%, Mo: up to 0.015%, or N: 0.001%-0.004%, which may have the following mechanical properties: Rp0.2&#x3c;180 MPa, Rm&#x3c;340 MPa, A80&#x3c;40%, and n value &#x3c;0.23. At least one surface may have an arithmetic mean roughness Ra of 0.8-1.6 &#x3bc;m and a peak count RPc of 75/cm. The present disclosure also concerns methods for producing flat steel products.

Cold-rolled and recrystallization annealed flat steel product, and method for the production thereof

A steel product may include a metallic anticorrosion coating of an aluminum alloy. So that such a steel product possesses high media resistance, more particularly high acid resistance and corrosion resistance, the steel product may be immersed in a liquid-melt coating bath that includes an aluminum alloy. In addition to Aluminum and unavoidable impurities, the aluminum alloy may include at least one of 0.2-2% by weight Mn or 0.2-7% by weight Mg, 0.5-5% by weight Fe, and at least one of 0.05-0.4% by weight Ti or 0.05-0.4% by weight Zr. A method for producing such steel products may involve providing a steel product in a hot-rolled or cold-rolled state, activating a surface of the steel product to remove passive oxides, and coating the surface-activated steel product by immersion in a liquid-melt coating bath that comprises an aluminum alloy having the aforementioned composition.

Steel product with an anticorrosive coating of aluminum alloy and method for the production thereof

The invention relates to a device and a method for hot-dip coating a metal strip with a metal covering, wherein the metal strip is directed continuously through a melt bath, wherein the thickness of the metal covering present on the metal strip when it leaves the melt bath is adjusted by means of a scraping device, and wherein slag which is present on the melt bath is driven away from the metal strip leaving the melt bath by means of a gas flow. To prevent slag from coming into contact with the metal strip leaving the melt bath, the invention drives away the slag from the metal strip by means of at least one nozzle which is arranged in close proximity to the metal strip, that a gas flow which extends over the width of the metal strip is directed onto the surface of the melt bath.

Method and device for hot-dip coating a metal strip with a metal covering

A method which allows process-stable hot-dip coating of Ni-alloy steel flat products in a cost- and resource-effective manner, including the following steps: a) provision of a steel flat product obtained by cold- or hot-rolling; b) within 1-30 s, heating the steel flat product to a holding temperature between 700 and 1100&#xb0; C., under a heating atmosphere of N2; c) holding the steel flat product at the holding temperature for a holding duration of 10-120 s under a holding atmosphere of N2; d) cooling the steel flat product from the holding temperature to a strip inlet temperature of 430-800&#xb0; C.; and e) passing the steel flat product through an inlet zone, in which an inert or reducing inlet atmosphere predominates, and passing the steel flat product through a melt bath, wherein TP&#x3e;TP&#x3e;TP

Method for hot-dip coating of a steel flat product

The invention relates to a device for strip guidance in a hot medium, comprising a deflection roller () which has two roller pins () and is mounted to supporting arms () by means of ceramic journal bearings (), wherein the journal bearings () are in each case arranged in a bearing receptacle () of the associated supporting arm (). The invention is characterized in that at least one of the journal bearings () in its associated supporting arm () is fixed in the bearing receptacle () by means of a force-fit that engages on the outer edge of the journal bearing () and balances the different heat expansion coefficients of the journal bearings () and the bearing receptacle ().

Device for strip guidance in a hot medium (II)

The invention relates to the field of materials science and to a device for reducing pressure in cavities in media at higher temperatures, such as those devices which can be used for devices for hot-dip coating metal materials in the metal processing industry for example. The aim of the invention is to provide a device by means of which pressure can be reduced in the cavity of the hollow bodies in a reliable and controlled manner and simultaneously the penetration of the media can be delayed or completely prevented at the higher temperatures. This is achieved by a device for reducing pressure in hollow bodies in media at higher temperatures, wherein at least one opening to the cavity of the hollow body is provided in hollow body regions which are not used for the intended application, said opening being closed from the medium surrounding the hollow body by at least one component made of a gas-permeable metal or ceramic material.

Device for reducing pressure in hollow bodies in media at higher temperatures

A method by which a flat steel product containing 2-35 wt. % of Mn can be provided with a coating of Zn which adheres well by annealing at an annealing temperature Tof 600-1100&#xb0; C. for an annealing time of 10-240 s under an annealing atmosphere which has a reducing effect on the FeO present on the flat steel product and an oxidizing effect on the Mn contained in the steel substrate thereby forming a layer of Mn mixed oxide which covers the flat steel product at least in sections and then cooling the flat steel product to a temperature for bath entry and conveying it through a bath of molten Zn saturated within iron at a temperature of 420-520&#xb0; C., within a dip time of 0.1-10 s.

Method for the hot-dip coating of a flat steel product containing 2-35 wt.% of Mn, and a flat steel product

The invention relates to a device for strip guidance in a hot medium, comprising a deflection roller () mounted on supporting arms () and a carrier device holding the supporting arms (). The device is characterized in that one of the supporting arms () is mounted on the carrier device by means of a floating bearing (), wherein the floating bearing () allows the mounted supporting arm on the carrier device to move parallel to the longitudinal direction of the deflection roller (), and in that an elastic counter element (), which acts parallel to the longitudinal direction of the deflection roller () upon the supporting arm () mounted on the floating bearing (), is present and counteracts an increasing distance between the supporting arms (). In this way, the technical problems of offsetting a temperature-induced length change of the deflection roller and avoiding an uncontrolled movement of the system are solved.

Device for strip guidance in a hot medium (I)

An apparatus and a method for the treatment of a flat steel product, taking place in throughput. The apparatus includes an indirectly heated annealing furnace chamber, a conveyor device for continuously conveying the flat steel product over a conveyor path leading from an entry to an exit of the annealing furnace chamber, and nozzle arrangements for feeding atmosphere gas, which is reactive in relation to the flat steel product, into the annealing furnace chamber. A controlled treatment of the flat steel product includes a first nozzle arrangement, from which a gas jet induces a first gas flow towards the entry of the annealing furnace chamber and sweeping over the surface of flat steel product to be treated. A second nozzle arrangement includes a gas jet which induces a second gas flow directed towards the exit of the annealing furnace chamber and sweeping over the surface of flat steel product.

Apparatus and method for the treatment of a flat steel product, taking place in throughput

A method for hot dip coating a flat stainless steel product with more than 5 wt. % Cr with a protective metallic coating by: heating the flat steel product under an oxygen-free heating atmosphere to 100&#xb0; C.-600&#xb0; C. within 1-30 seconds; continuing heating to a holding temperature of 750&#xb0; C.-950&#xb0; C., by heating to 550&#xb0; C.-800&#xb0; C. under an inert or reducing atmosphere, holding within this temperature window for 1 to 15 seconds under an oxidizing atmosphere, and continuing heating under an inert or reducing atmosphere, until the holding temperature is reached; holding at the holding temperature for 10-120 seconds under a reducing atmosphere; and passing the flat steel product through a nozzle area under an inert or reducing atmosphere at 430&#xb0;-780&#xb0; C. and into a molten bath in which the flat steel product is coated with the metallic coating.

Method for hot dip coating a flat steel product

A readily formable flat steel product has a ductile edge layer that is from 10 to 200 &#x3bc;m thick and has a ductility greater than a ductility of an inner core layer of the flat steel product. The readily formable flat steel product is produced by annealing a flat steel product having a C content of from 0.1 to 0.4% by weight in a continuous furnace. The annealing is carried out under an annealing atmosphere that contains from 0.1 to 25% by vol. of Hand HO, with the balance being Nand technically unavoidable impurities. A dew point is between &#x2212;20&#xb0; C. and +60&#xb0; C., and a ratio of HO/His a maximum of 0.957. In the course of the annealing, the flat steel product is heated to a holding temperature of from 600 to 1100&#xb0; C. and for a holding time of from 10 to 360 seconds.

Method for producing a flat steel product which can be readily formed, flat steel product and method for producing a component from such a flat steel product

Optimal wetting and adhesion of the hot-dip coating by way of pre-oxidation in a DFF pre-heating furnace and humidification of the annealing atmosphere in a holding zone is achieved in a hot dip galvanised flat steel product.

Method for producing a flat steel product provided with a metal protective layer by way of hot dip coating

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Hagen, Germany

Marc Blumenau