Thyssenkrupp Stahl Ag

Thyssen Stahl Ag

Thyssen Krupp Ag

Thyssenkrupp Steel Europe Ag

Thyssenkrupp Steel Ag

Thyssenkrupp Electrical Steel Ebg Gmbh

Achenbach Buschhütten Gmbh & Co. Kg

C.d. Walzholz Gmbh

Rudolf Kawalla

Friedrich Behr

Axel Barten

Hans Pircher

Carl-Dieter Wuppermann

Brigitte Hammer

Karl Ernst Friedrich

J&uuml;rgen Schneider

Gerd Sussek

Manfred Espenhahn

Waldemar Wolpert

Thomas Heller

Olaf Fischer

Walter Wilms

Bernhard Engl

Karl Telger

Hans-Toni Junius

Frank Hisker

Klaus G&uuml;nther

Thomas Stegemann-Auhage

Jochen Bobbert

Pino Tesè

Gerd Susek

Reinhard Poprawe

Wolfgang Rasim

Thomas B&ouml;hm

Hans-Peter Schmitz

Joergen Schneider

Hans Huneus

Jurgen Mahn

Norbert Brachthäuser

Gunter Weihrauch

Heinz Höfinghoff

Grzegorz Korpala

Andreas B&ouml;ttcher

Klaus Peters

Ralf Polzin

Axel Marx

Thomas Rücker

Victor Blinov

Christian Kreutz

A complexly formed steel component may have a tensile strength Rm of greater than 1200 MPa and an elongation at break A50 of greater than 6%. Example methods for producing such components comprise providing a flat steel product, which in addition to iron and unavoidable impurities, contains in percent by weight 0.10-0.60% C, 0.4-2.5% Si, up to 3.0% Al, 0.4-3.0% Mn, up to 1% Ni, up to 2.0% Cu, up to 0.4% Mo, up to 2% Cr, up to 1.5% Co, up to 0.2% Ti, up to 0.2% Nb, and up to 0.5% V. At least 10% by volume of a microstructure of the flat steel product may consist of residual austenite comprising globular residual austenite islands with a grain size of at least 1 &#x3bc;m. Before being cooled, the flat steel product may be heated to a forming temperature of 150-400&#xb0; C. and formed into a component with a degree of forming that is at most equal to uniform elongation Ag.

Method for producing a steel component

The invention relates to a method for producing a magnesium hot strip, in which a melt from a magnesium alloy is continuously cast to form a roughed strip with a thickness of maximum 50 mm, and in which the cast roughed strip is hot-rolled directly from the cast heat at a hot-rolling initial temperature of at least 250&#xb0; C. and maximum 500&#xb0; C. to form a hot strip with a final thickness of maximum 4 mm, whereby in the first hot-rolling pass a reduction in the thickness of at least 15% is achieved. With the method according to the invention, magnesium sheets with improved deformability can be produced with reduced manufacturing effort and expenditure.

Method for producing a magnesium hot strip

The present invention relates to a hot-rolled steel strip for further processing to form non-grain oriented electrical sheet with the following composition (in % by weight) C: &#x3c;0.02%, Mn: &#x2266;1.2%, Si: 0.1-4.4%, Al 0.1-4.4%, wherein the sum formed from the Si content and twice the Al content is &#x3c;5%, P: &#x3c;0.15%, Sn: &#x2266;0.20%, Sb: &#x2266;0.20%, the remainder iron and unavoidable impurities, with a strip thickness which is at most 1.8 mm, and with a partially softened structure which is characterised by a high intensity for the &#x3b1; fibre (fibre representation of orientation distribution functions) in the region of 0&#xb0; to 60&#xb0;, wherein the ratio I/Iformed from the intensity Iof the position (112) &#x3c;110&#x3e; to the intensity Iof the position (001) &#x3c;110&#x3e; is &#x3e;0.4 and the ratio I/Iformed from the intensity Iof the position (111) &#x3c;110&#x3e; to the intensity Iof the position (001) &#x3c;110&#x3e; is &#x3e;0.2.

Hot-rolled strip intended for the production of non-grain oriented electrical sheet and a method for the production thereof

The invention relates to a method for producing hot strip which features good forming ability and increased strength. This is achieved in that a hot strip (W) which is produced in particular from continuous casting in the shape of reheated slabs or slabs obtained directly from the casting heat, from thin slabs or cast strip, based on a steel comprising (in mass %) C: 0.001-1.05%; Si: &#x2266;1.5%; Mn: 0.05-3.5%; Al: &#x2266;2.5%, if necessary further elements such as Cu, Ni, Mo, N, Ti, Nb, V, Zn, B, P, Cr, Ca and/or S, with the remainder being iron as well as the usual accompanying elements, is continuously finish rolled and subsequently continuously cooled, with cooling taking place in at least two subsequent cooling phases (t, t) of accelerated cooling, to a final temperature; with the first cooling phase (t) of accelerated cooling starting at the latest three seconds after the last pass of finish rolling; and with the hot strip (W) during the first cooling phase (t) of accelerated cooling being cooled at a cooling rate of at least 150&#xb0; C./s.

Method for producing a hot-rolled strip

The present invention relates to a method for producing non grain-oriented magnetic steel sheets in which hot strip is produced from an input stock such as cast slabs, strip, roughed strip, or thin slabs, made of steel comprising (in weight %) C: 0.001-0.05%; Si: &lE;1.5%; Al: &lE;0.4% with Si&plus;2Al&lE;1.7%; Mn: 0.1-1.2%; if necessary up to a total of 1.5% of alloying additions such as P, Sn, Sb, Zr, V, Ti, N, Ni, Co, Nb and/or B; with the remainder being iron as well as the usual accompanying elements; in that the input stock is hot-rolled directly from the casting heat or after preceding reheating to a reheating temperature between min. 1000&deg; C. and max. 1180&deg; C. in several deformation passes, and subsequently coiled, wherein during hot-rolling at least the first deformation pass takes place in the austenitic region and at least one further deformation pass takes place in the two-phase mixing region austenite/ferrite, and wherein during rolling in the two-phase mixing region a total deformation &egr; of at least 35% is achieved.

Method for producing non-grain oriented electric sheet steel

The invention relates to a method for producing non-grain-oriented hot-rolled magnetic steel sheet in which from a raw material such as cast slabs, strip, roughed strip or thin slabs produced from a steel comprising (in weight %) C: 0.0001-0.05%; Si: &lE;1.5%; Al: &lE;0.5%, wherein &lsqb;% Si&rsqb;&plus;2&lsqb;% Al&rsqb;&lE;1.8; Mn: 0.1-1.2%; if necessary up to a total of 1.5% of alloying additions such as P, Sn, Sb, Zr, V, Ti, N, Ni, Co, Nb and/or B, with the remainder being iron and the usual impurities, in a finishing roll line at temperatures above the Ar temperature, a hot strip with a thickness &lE;1.5 mm is rolled, wherein at least the last forming pass of hot rolling is carried out in the mixed region austenite/ferrite and wherein the total deformation &egr; achieved during rolling in the mixed region austenite/ferrite is <35%. With the method according to the invention, it is possible in particular to economically produce thicker magnetic steel sheet which is not grain-oriented and which has good magnetic properties.

Method for producing non-grain-oriented magnetic steel sheet

Method of producing non-grain-oriented electrical sheet

The invention relates to a process for the production of tailored blanks by the hot rolling of a strip and to an apparatus for the performance of said process. To obtain tailored blanks to be cut to length from the rolled strip, the hot strip is cooled or heated in portions, so that with a substantially constant rolling force the strip undergoes a differential decrease in thickness in the individual portions, which have been given a differential yield stress value by the differential temperature adjustment.

Method and device for producing a metal strip for tailored blanks to be cut to length

A process for the production of grain-oriented electric quality sheet by melting a silicon steel and casting the melt continuously into a strand having a thickness of 25-100 mm. During solidification the strand is cooled to a temperature above 700&deg; C. and divided into thin slabs. The thin slabs then pass through an equalization furnace standing in line where they are reheated to a temperature &lE;1170&deg; C. and continuously rolled in a multi-stand hot rolling mill to give hot strip having a thickness of &lE;3.0 mm. The first shaping pass is performed at a temperature in the rolling stock up to 1150&deg; C. The reduction in thickness is at least 20%. The hot strip is cold rolled in one or more stages with recrystallizing intermediate annealing to a final thickness in the range of 0.15-0.50 mm. The cold strip is then annealed with recrystallization and decarburization, furnished with a predominantly MgO-containing annealing separator and given a final annealing for imprinting a Goss texture. The strip is then coated with an electric insulation and given a stress-free annealing.

Process for the production of grain-oriented electric quality sheet with low remagnetization loss and high polarization

The invention relates to a method to produce non-grain-oriented magnetic steel sheet made of thin-slab or slab casting with low specific total loss and high polarisation and favourable mechanical properties. It is a characteristic of the invention that the steel slabs are hot rolled either directly from the casting heat or after a reheating to T&gE;900 &deg; C. and two or more metal forming passes are performed in the two-phase region austenite/ferrite in the course of finishing rolling.

Method for producing non-grain oriented magnetic sheet steel

The invention relates to the joining of flat products of metallic materials to be interconnected overlapping. The joining takes place in a roll nip into which the flat products to be interconnected are introduced at an acute angle. Before they are pressed on one another in the roll nip, they are heated on their facing surfaces by radiation energy, but not melted. By a suitable profiling of at least one roller generated surface or one flat product the surface pressing is limited to the zone of the overlap joint and any flow of material transversely of the direction of the overlap joint is prevented.

Method and device for joining flat products to be connected such that they overlap

The invention relates to a process for producing strips of homogenous structures and characteristics made of non-alloyed and low-alloyed steel by continuous hot rolling in several roll passes in the austenitic region and subsequently in the ferritic region, as well as coiling. The invention is characterised in that continuous-cast strip and/or strip rough rolled in the austenitic region, starting with a temperature T&gE;Ar,&plus;30&deg; C., with a total degree of deformation of e,&gE;30% is rolled in two or several roll passes in the austenitic region and in that the rolling stock is intensively cooled after every roll pass until the ferritic transformation has been completed, after which the rolling stock is end rolled to final thickness in the ferritic range in several passes with a total degree of deformation e,&gE;60%.

Hot-rolling steel strip

Laser-assisted plating of strip

The invention relates to a process for the production of very hard armour plates from steel slabs, wherein the slabs are hot rolled to a final thickness above 50 mm and then hardened and possibly tempered. The characterizing feature of the invention is that a continuously cast slab is produced from a steel having

Process for the production of thick armour plates

The invention relates to a process for the production of hot rolled strip or heavy plates from stainless and refractory steels or from forgeable alloys on a nickel basis with a final thickness in the range of 5 to 60 mm by the production of a slab from monobloc casting or by continuous casting and heating the slab at a temperature above 1100.degree. C. followed by the hot rolling of the slab and accelerated cooling of the product rolled to the end thickness. The characterizing feature of the invention is that the heated slab is rolled without interruptions first to a maximum of 1/6 of its initial thickness, mainly by deformation passes in which the degree of deformation pass in the thickness direction is greater than the degrees of deformation shown by curve A in FIG. 1, in dependence on the surface temperature of the product. Then finish rolling is performed to the end thickness, mainly by deformation passes in which the degree of deformation per pass in the thickness direction is greater than the degrees of deformation shown by curve B1 or curve B2 in FIG. 1, in dependence on the surface temperature of the product and the pause between two adjacent passes as parameters. The surface temperature of the finish rolled product must be

Process for the production of hot rolled steel or heavy plates

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Bobritzsch, Germany

Rudolf Kawalla