Abstract: 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 ?m. Before being cooled, the flat steel product may be heated to a forming temperature of 150-400° C. and formed into a component with a degree of forming that is at most equal to uniform elongation Ag.

Abstract: 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 ?m. Before being cooled, the flat steel product may be heated to a forming temperature of 150-400° C. and formed into a component with a degree of forming that is at most equal to uniform elongation Ag.

Abstract: A cold-rolled flat steel product where Rm?1400 MPa and A80?5% and also a method for producing such product. The product includes, in addition to Fe and unavoidable impurities (in wt. %), 0.10-0.60% C, 0.4-2.5% Si, ?3.0% Al, 0.4-3.0% Mn, ?1.0% Ni, ?2.0% Cu, ?0.4% Mo, ?% Cr, ?1.5% Co, ?0.2% Ti, ?0.2% Nb, ?0.5% V. The microstructure includes (in vol. %) ?20% bainite, 10-35% residual austenite and martensite as the remainder. A slab, thin slab or a cast strip having said composition, is hot-rolled to form hot strip with a hot-rolling end temperature ?830° C., coiled at a coiling temperature ?560° C., cold-rolled at ?30% reduction and heat-treated by firstly being heated to an annealing temperature ?800° C., then being cooled at a cooling rate of ?8° C./s to a holding temperature of 470° C. to greater than the martensite start temperature and then being held at the holding temperature until at least 20 vol. % bainite is present in the microstructure.

Abstract: A hot-rolled flat steel product having a product of Rm and A80 of ?18,000 MPa*%, a composition including (in wt.) C:0.10-0.60%, Si:0.4-2.0%, Al:?2.0%, Mn:0.4-2.5%, Ni:?1%, Cu:?2.0%, Mo:?0.4%, Cr?2%, Ii:?0.2%, Nb:?0.2%, V:?0.5%, remainder Fe and unavoidable impurities, and a microstructure of bainite and residual austenite, wherein the microstructure includes ?60 vol.% bainite, and wherein at least some of the residual austenite is in block form and ?98% of the residual austenite blocks have a size of ?5 ?m. Also, a method where a slab, thin slab or a cast strip having the aforementioned composition is hot-rolled at a hot-rolling end temperature of ?880° C., cooled with a cooling rate of ?5° C./s to a coiling temperature between the martensite start temperature and 600° C., coiled, and cooled in the coil while being held between the bainite start temperature and the martensite start temperature until ?60 vol.% of the hot strip microstructure is bainite.

Abstract: 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° C. and maximum 500° 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.

Abstract: 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: <0.02%, Mn: ?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 <5%, P: <0.15%, Sn: ?0.20%, Sb: ?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 ? fibre (fibre representation of orientation distribution functions) in the region of 0° to 60°, wherein the ratio I112/I001 formed from the intensity I112 of the position (112) <110> to the intensity I001 of the position (001) <110> is >0.4 and the ratio I111/I001 formed from the intensity I111 of the position (111) <110> to the intensity I001 of the position (001) <110> is >0.2.

Abstract: The invention relates to a method for shaping wire-shaped and rod-shaped starting materials by rolling, especially for rolling flat profiled elements consisting of a wire rod. The starting material is heated in a heating station at a desired temperature, shaped during at least one rolling process, and then cooled. According to the invention, once the starting material has been heated in the heating station, it is cooled in a cooling station to a pre-determinable rolling temperature; it is then shaped into a flat profiled element by rolling close to the gauge block, and then cooled and/or subjected to a subsequent treatment according to joining properties to be correspondingly adjusted. In this way, a series of different methods can be carried out by means of an installation for rolling starting materials with a patented structure, an austenite structure, a bainite structure or an undercooled austenite structure.

Abstract: 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: ?1.5%; Mn: 0.05-3.5%; Al: ?2.

Abstract: 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: ≦1.5%; Al: ≦0.4% with Si+2Al≦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° C. and max. 1180° C.

Abstract: 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: ≦1.5%; Al: ≦0.5%, wherein [% Si]+2[% Al]≦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 Ar1 temperature, a hot strip with a thickness ≦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;H achieved during rolling in the mixed region austenite/ferrite is <35%.

Abstract: 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° C. and maximum 500° 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.

Abstract: 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: ≦1.5 %; Al: ≦0.5 %, wherein [% Si]+2[% Al]≦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 Ar1 temperature, a hot strip with a thickness ≦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;H achieved during rolling in the mixed region austenite/ferrite is <35 %.

Abstract: Method for producing non-grain-oriented electric sheet comprising: introducing steel input stock as a heated and prerolled slab into finishing rolls at a temperature of ≦1100° C. wherein the reheating temperature (TBR) corresponds to a reheating target temperature (TZBR) determined by the formula: TZBR(° C.)=1195° C.+12.716*(GSi+GAl) wherein TZBR(° C.)=target temperature of the reheated slab GSi=Si content in weight % GAl=Al content in weight % hot rolling to a thickness<3.5 mm at a final rolling temperature (TET)≧770° C. coiling at a temperature (THT) wherein THT(° C.)=154−1.8&agr;t+0.577 TET+111d/d0 wherein d0=reference thickness of the strip=3 mm d=actual thickness of the strip in mm t=time in seconds between the end of hot rolling and coiling &agr;=0.7/sec. to 1.3/sec. cooling factor pickling and cold rolling to a thickness of 0.2-1 mm.

Abstract: 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.

Abstract: 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° 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 ≦1170° C. and continuously rolled in a multi-stand hot rolling mill to give hot strip having a thickness of ≦3.0 mm. The first shaping pass is performed at a temperature in the rolling stock up to 1150° 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.

Abstract: 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≧900 ° C. and two or more metal forming passes are performed in the two-phase region austenite/ferrite in the course of finishing rolling.

Abstract: 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.

Abstract: 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≧Ar3+30° C., with a total degree of deformation of eh≧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 eh≧60%.

Abstract: Process for the joining of strips and/or sheets of metallic materials, wherein the strips/sheets are introduced converging on one another at an angle into a roll nip, the surfaces coming into contact with one another being heated, but not melted by a laser beam immediately prior to physical contact and the strips/sheets being so pressed together in a directly following joining pass that they are rigidly connected to one another at material surfaces brought into contact.

Abstract: 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 having0.25 to 0.32% C0.05 to 0 75% Si0.10 to 1.50% Mn0.90 to 2.00% Cr0.10 to 0.70% Mo1 20 to 4 50% Ni0.01 to 0.08% Almax 0.015% Pmax 0.005% Smax 0.012% Nresidue Fe, including usual impurities,the slab then being heated to a temperature of 1150.degree. C. or higher and heated through, whereafter following cooling in air and by the spraying of its two wide sides with pressurized water, the slab is hot rolled with a surface temperature in the range of 1050.degree. to 900.degree. C. in shaping passes having an individual deformation of .epsilon..sub.h >0.1 and with a shape factor SF>0.40 to the final thickness.