Abstract: With a continuous casting method for producing preliminary profiles, in particular double T preliminary profiles, the downwardly flowing cooling water is pushed out of the internal curve of the preliminary profile strand (3) via the profile flanges and discharged using water nozzles (21, 22) aligned substantially to the crossover from the bar (4) to the respective flange (5, 6) by means of the diverting water delivered via the water nozzles (21, 22). In this way the excessive cooling caused by downwardly running cooling water is largely avoided in the internal curve of the preliminary profile strand.

Abstract: The present invention relates to an injector for an arc furnace. The injector comprises a head suitable to face into the furnace and a body suitable to support the head. The head and body are manufactured separately from each other, and are fastened by means of removable connection means in order to implement said injector.

Abstract: The invention relates to a continuous casting installation, for example for steel billet and bloom formats having substantially rectangular or circular cross-section. The invention improves the strand structure in the corner areas, to avoid rhomboidity, cracks and dimensional imperfections of the strand cross-section while achieving a high throughput capacity per strand and reducing investment and running costs. The fillets of the groove curvatures in the die cavity amount to a proportion of the length of the side of the strand cross-section. The degree of curvature 1/R of the groove curvatures decreases in the direction of the strand at least along at least partial length of the entire casting die, thereby achieving gap elimination between the casting shell and the casting die wall and/or a targeted casting shell shaping in the area of the groove curvature.

Abstract: Apparatus and method for electrolytic coating of a mould, the internal surfaces of which demarcate a mould cavity, with a coating material for the purpose of achieving or re-achieving intended mould cavity dimensions. The mould, as the cathode, and an anode positioned in the mould cavity and an electrolyte containing the coating material are used. The electrolyte serving as the carrier of the coating material flows through the mould cavity in a controlled manner. During the electrolytic coating, only the internal surfaces of the mould cavity come into contact with the electrolyte and the external surfaces of the s mould therefore do not have to be covered. The mechanical properties can be kept largely uniform over the entire region. The coating can be achieved more rapidly than with the conventional processes.

Abstract: Semifinished products, especially strand sections that are cut off from continuous cast strands, are marked in steel mills and rolling mills so that individual pieces can be tracked. The marks applied or attached to the pieces have to be machine-readable in a sorting station. Marking and reading devices are expensive and produce undesired reading errors. The aim of the invention is therefore to create a method and a device that avoid the aforementioned disadvantages and that allow for a reliable and cost-efficient identification of semifinished products. For this purpose, a first camera is used in an identification station to obtain digitized images of optically visible separating section-specific and strand section-specific surface features on an identification surface and the images are stored in a database.

Abstract: In a method and apparatus for the continuous casting of preliminary steel sections, the liquid or molten steel is introduced substantially vertically into an open-ended die. The cross section of the cavity of the die is made up of a web part and one or more flange parts, for example, such as in preliminary double-T sections. The liquid core of the strand of the preliminary section is set in agitating motions transversely to the direction of continuous casting by selectively using electromagnetically-induced forces in the regions of the flange parts and/or of the web part. The agitating motions have the effect of exchanging the liquid steel in the molten crater of the strand of the preliminary section in and between flange parts and the web part.

Abstract: The invention relates to a continuous casting installation, for example for steel billet and bloom formats having substantially rectangular or circular cross-section. The invention improves the strand structure in the corner areas, to avoid rhomboidity, cracks and dimensional imperfections of the strand cross-section while achieving a high throughput capacity per strand and reducing investment and running costs. The fillets of the groove curvatures in the die cavity amount to a proportion of the length of the side of the strand cross-section. The degree of curvature 1/R of the groove curvatures decreases in the direction of the strand at least along at least partial length of the entire casting die, thereby achieving gap elimination between the casting shell and the casting die wall and/or a targeted casting shell shaping in the area of the groove curvature.

Abstract: The invention relates to a marking machine for metallurgical products, more particularly continuous cast products, comprising at least one marking stamp and a striking device for striking the marking stamp into the product to be marked. The striking device is provided with a striking bolt and a striker spring driving said bolt. The striking bolt strikes the marking stamp that is placed in striking position by actuating the striker spring with an actuation element that is driven by an electric motor, thereby hammering the marking stamp into the product to be marked. Every time the marking stamp is subjected to the action of the spring, the stamp receives an evenly high kinetic energy thereby causing an evenly high striking depth of the marking. The spring in association with the electric motor drive enables fast, precise and easily controllable execution of the individual working steps of the machine. The ensures a high marking repetition rate.

Abstract: In the continuous casting of round or polygonal billet and bloom formats, use is made of moulds the mould cavity of which comprises a copper tube (3) which is intensively cooled by means of water-circulation cooling. In order to increase the cooling capacity on the one hand and the dimensional stability of the mould cavity (4) on the other hand, and also extend the total service life of the copper tube (3), it is proposed to provide the copper tube (3) with a supporting shell (12) or supporting plates over the entire circumference at the tube outer lateral surface (5). For the cooling of the copper tube (3), cooling ducts (6) for guiding the cooling water are arranged on the copper tube (3) or on the supporting shell (12). The cooling ducts (6) are distributed over the entire circumference at the tube outer lateral surface (5) and extend substantially over the entire mould length.

Abstract: A die cavity of a casting die, such as for continuously casting billets, blooms and blanks. The die cavity has a cross-section with a partially curved peripheral line, whereby, with the cavity walls cooled, provides improved heat exchange between a forming strand shell and the die cavity wall, thus avoiding solidification defects in the strand shell. The degree of curvature 1/R is reduced at least on part of the curved peripheral line of the corner regions from peripheral lines of the same corner regions, that are successive in the casting direction, and at least over part of the length of the die, in the concave corner regions of the die cavity, in order to control the targeted closure of the gap between the strand shell and the cooled die cavity, or a targeted strand shell deformation.

Abstract: A die cavity of a casting die, such as for continuously casting billets, blooms and blanks. The die cavity has a cross-section with a partially curved peripheral line, whereby, with the cavity walls cooled, provides improved heat exchange between a forming strand shell and the die cavity wall, thus avoiding solidification defects in the strand shell. The degree of curvature 1/R is reduced at least on part of the curved peripheral line of the corner regions from peripheral lines of the same corner regions, that are successive in the casting direction, and at least over part of the length of the die, in the concave corner regions of the die cavity, in order to control the targeted closure of the gap between the strand shell and the cooled die cavity, or a targeted strand shell deformation.

Abstract: In the continuous casting of round or polygonal billet and bloom formats, use is made of moulds the mould cavity of which comprises a copper tube (3) which is intensively cooled by means of water-circulation cooling. In order to increase the cooling capacity on the one hand and the dimensional stability of the mould cavity (4) on the other hand, and also extend the total service life of the copper tube (3), it is proposed to provide the copper tube (3) with a supporting shell (12) or supporting plates over the entire circumference at the tube outer lateral surface (5). For the cooling of the copper tube (3), cooling ducts (6) for guiding the cooling water are arranged on the copper tube (3) or on the supporting shell (12). The cooling ducts (6) are distributed over the entire circumference at the tube outer lateral surface (5) and extend substantially over the entire mould length.

Abstract: Semifinished products, especially strand sections that are cut off from continuous cast strands, are marked in steel mills and rolling mills so that individual pieces can be tracked. The marks applied or attached to the pieces have to be machine-readable in a sorting station. Marking and reading devices are expensive and produce undesired reading errors. The aim of the invention is therefore to create a method and a device that avoid the aforementioned disadvantages and that allow for a reliable and cost-efficient identification of semifinished products. For this purpose, a first camera is used in an identification station to obtain digitized images of optically visible separating section-specific and strand section-specific surface features on an identification surface and the images are stored in a database.

Abstract: Apparatus and method for electrolytic coating of a mould, the internal surfaces of which demarcate a mould cavity, with a coating material for the purpose of achieving or re-achieving intended mould cavity dimensions. The mould, as the cathode, and an anode positioned in the mould cavity and an electrolyte containing the coating material are used. The electrolyte serving as the carrier of the coating material flows through the mould cavity in a controlled manner. During the electrolytic coating, only the internal surfaces of the mould cavity come into contact with the electrolyte and the external surfaces of the s mould therefore do not have to be covered. The mechanical properties can be kept largely uniform over the entire region. The coating can be achieved more rapidly than with the conventional processes.

Abstract: For the alternative guiding of an I-shape or dog bone profile or a bloom, roller members or rolls are mounted at two sides of a support. By rotating such support it is possible to positionally set those rollers best suited for the processing of the momentary type of strand which is being cast.

Abstract: A molten metal stream is fed downwardly, especially essentially vertically, into a double-ended, chilled horizontal mold where the molten metal is formed into two strands which are cooled and simultaneously bidirectionally withdrawn from opposed ends of the horizontal mold. The infed hot molten metal stream is deposited within the double-ended horizontal mold such that a so-to-speak hot wall forms at the immediate vicinity of the inflow region where the molten metal enters the horizontal mold. This hot wall precludes formation of a strand shell or skin which otherwise would undesirably interconnect the two formed strands, so that not only is the resistance to mold oscillation decreased, but the individual strands can be cleanly withdrawn from each side of the mold without the danger of undesired and uncontrolled interaction arising between the two withdrawn strands and without the need to have to rupture any such interconnecting strand shell or skin.

Abstract: For a multi-strand continuous casting installation there is proposed accomplishing the transverse conveying or transfer of the cut strand sections, not as was heretofore conventional practice by a single clearing or removal movement occurring over the entire width of the installation, rather by a number of successive partial conveying strokes or movements, wherein the strand section is displaced from its starting position either through the distance (s) or the distance (s'). Consequently, there is required for each strand section a number of shorter partial conveying strokes or displacement movements corresponding to the ordinal number of the strand from which it is derived, and thus, during cutting of shorter strand sections the clearing time can be better accommodated to the cycling of the cutting operation. The displacement paths, depending upon the technique employed, amount to either s=d.multidot.(N-1)/N or s'=d.multidot.N/(N+1), wherein N constitutes the number of strands and d their spacing.

Abstract: A method for continuous casting steel, wherein the liquid core is stirred at the region of the mold. The electromagnetic forces are altered as a function of the change in the strand withdrawal speed.

Abstract: A method of treating a continuously cast strand formed of stainless steel, wherein, prior to cutting the strand, the surface layer of the strand is deformed at oppositely situated sides by oppositely situated rollers of at least one pair of rollers and subsequently heated in order to produce a recrystallized marginal zone of more than three millimeters thickness for each such deformed side of the strand.

Abstract: A dummy bar head for a continuous casting installation, particularly for casting steel, containing a dovetail-shaped coupling portion which can be decoupled by carrying out a relative movement between the dummy bar head and the cast strand. The relative movement is undertaken in a direction approximately transverse to the strand withdrawal direction. To ensure a disturbance-free starting of the continuous casting operation, with high casting speeds, the dovetail-shaped coupling portion comprises a raised or protruding dovetail-shaped body. The dovetail-shaped body or body member essentially contains a trapezoidal-shaped surface area. A boundary surface of the raised body has aligned therewith a boundary surface of the dummy bar head which is arranged in the strand withdrawal direction and as to the remaining three boundary surfaces at least two oppositely situated ones thereof contain undercut portions.