Thyssen Stahl Ag

Thyssenkrupp Stahl Ag

Hans Pircher

Rudolf Kawalla

Gerd Sussek

Manfred Espenhahn

Carl-Dieter Wuppermann

Waldemar Wolpert

Brigitte Hammer

J&uuml;rgen Schneider

Walter Wilms

Friedrich Behr

Thomas Heller

Olaf Fischer

Bernhard Engl

Karl Ernst Friedrich

Klaus Blumel

Thomas Stegemann-Auhage

Klaus G&uuml;nther

Klaus Peters

Pino Tesè

Ralf Polzin

Jurgen Mahn

Jochen Bobbert

Gunter Weihrauch

Hans Huneus

Gerd Susek

Reinhard Poprawe

Werner Bentz

Alfred Tegethoff

Andreas B&ouml;ttcher

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 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

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

The invention relates to a light structural steel plate in the form of a hump plate and to a process for its production. The light structural steel plate comprises a mould-pressed steel hump plate (1) and a flat aluminium plate (3) connected thereto substance-to-substance at a the hump end faces. The substance-to-substance connection is produced by the feature that after the surfaces to be interconnected at the hump end faces have been activated by means of a laser beam (5), said surfaces are metallically connected under pressure. The decisive factor is that the material of the plates (1, 2) does not pass into the molten phase during activation by means of the laser beam (5).

Light structural metal plate in the form of a hump plate and process for

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

The invention comprises a process for the production of clad hot rolled strip. A steel slab as base material is cladded with a layer material of a corrosion-resistnt material. The slab is of a low-alloy steel having a carbon content of up to 0.25% by weight, the layer material preferably is stainless, more particularly a stainless austenitic steel or a wrought alloy on a nickel basis. The steel slab and the layer material are connected by explosive cladding, the resulting composite body being heated to rolling temperature and is subsequently rolled down to one quarter of the initial thickness with a high reduction of pass of phi greater than 0.10 and then rolled to final thickness of the hot rolled strip. The finish rolling temperature is in the range of 900.degree. C. The clad hot rolled strip is subjected to a cooling rate in the core of at least 8.degree. C./s to a cooling temperature of below 650.degree. C. After cooling to this temperature range the clad hot rolled strip is coiled and cooled to room temperature.

Process for the production of clad hot rolled strip and the resulting

Armour-plate comprising a two layer bonded subsequently heat-treated clad steel comprising an upper layer and a base layer wherein: (a) the upper layer contains (in percent by weight)

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Mülheim, Germany

Hans Pircher