Abstract: The invention relates to a method of operating a strip casting machine for producing a metal strip, during which molten metal is continuously poured between two casting rolls (1, 2) that form a casting gap. Lateral seals (10) having sealing plates (11) are provided for laterally delimiting the casting gap, whereby the sealing plates (11) are placed or pressed with a preset placement or pressing force, whose magnitude can be set, against the end surfaces of the casting rolls (1, 2). The sealing plates (11) are, in repeatable stop-and-go steps, placed with a preset force and time against the end surfaces of the casting rolls (1, 2) and are held in the placing position for a preset time. This enables a distinct reduction in the wear of the sealing plates and of the casting roll end surfaces.

Abstract: The invention relates to a method and a device for cooling and/or lubricating rollers, in particular the working rollers (2, 3) on a rolling stand and a rolled strip (1), rolled between the above rollers and transported onwards, using water in the form of spray jets (4, 5) as cooling medium and oil, oil/water mix, oil/water mix, oil/air/water mix or grease mixtures as lubricant. In order to improve the lubricating and cooling effects, a combined application of super-cooling the strip and roller surfaces and roller lubrication on the input side of the stand is disclosed, in which both media, water and lubricant, are separately fed to the rollers (2, 3) and the rolled strip and applied to the roller surface at different application points. Separate reservoirs for water and lubricant and separate lines to the spraying bar (11) for water and the spraying bar (12) for the lubricant are provided.

Abstract: A method and strand guide for supporting, guiding and cooling casting strands (1) made of steel, especially preliminary sections (2) for girders, which are cooled by injected water (29) and are drawn, serve to prevent cracks, especially surface cracks, from appearing in the microstructure by adapting the cooling conditions of the surface of the strand in the region of the secondary cooling, and serve to prevent undercooling of the strand shell, wherein in order to avoid an undesirable solidification structure on the upper flange edges or in other cross-sectional areas, the cooling and support of the beam blank format are so adapted to the solidification range that cooling and support are provided exclusively where a crater is formed.

Abstract: A section straightening machine is operated by a method which involves passing the structural sections through the array of straightening tools. Section straightening forces are applied to adjustable shafts carrying the tools and adjusters at the service sides of the shaft applying forces acting counter to the section straightening forces.

Abstract: The invention relates to a damper construction (2) of a furnace coiler (1) which can especially be used in Steckel mills (1). A hot rolled strip is respectively coiled onto, and uncoiled off, a drum inside the furnace in a reversing manner, by means of a back and forth transport movement, and is optionally heated. Guiding flaps (6, 6?) are mounted on the displaceable damper (2) of the furnace coiler, for inserting and guiding the rolled strip. In order to improve maintenance work, the dampers (2) and the furnace coiler (1) are embodied as separate components. The dampers (2) are arranged on an element (4?) pertaining to a displaceable roller rack (4), said element being located beneath the furnace coiler (1). Each damper (2) is divided into at least two elements (2?, 2?) which can be hinged together, the two hinged elements being connected by means of a hinge bearing (7) in a pivoting manner.

Abstract: The invention relates to a method and casting roller plant for the semi-endless or endless rolling by casting of a metal, in particular a steel strip (1a), which may be transversely separated as required after solidification. The casting strip part lengths (20) are fed to a roller furnace (2) for heating and equilibration at the rolling temperature and the partial lengths (20) for rolling out are fed to a rolling train (3) for rolling, whereby the strip casting is continued uninterrupted during the rolling operation. According to the invention, a closer matching of the strip casting and the rolling can be carried out, whereby the casting speed (Vc) is reduced for a roller change such that between the end of rolling a preceding multiple length (21) and the insertion of a new partial length (20) or multiple lengths (21) into the rolling gear a sufficient buffer time for a roller exchange is provided.

Abstract: The invention relates to a method for producing metal strips and sheets involving the following method steps: pouring a strand, which is provided in the form (1) of thin slabs and which is comprised of carbon steel or special steel, into a casting machine (4) and rolling the cast product away from the casting heat. The aim of the invention is to utilize free capacities of existing installations, that is, installations not operating at full capacity, with which primary carbon steels are produced, in order to supplement other types of steel or to supplement cast products produced in another manner. To this end, the invention provides that, together with these first cast products (1), at least second cast products (2), which are produced in a second process route (II) from special steel if the first thin slabs are cast from carbon steel or are produced from carbon steel if the first thin slabs are cast from special steel, are rolled within a joint rolling program.

Abstract: Continuously cast products (12) are often provided with surface defects such as oscillation marks (17) and other non-homogeneous structures in the cast state thereof during production in a casting die (11) of a continuous casting plant (10). Defects which render a strip useless for superior applications also frequently occur on the strip surface during subsequent milling of the slab (12?) into a strip. The aim of the invention is to minimize said defects and provide the rolling mill with a slab (12?) having a desired preliminary profile and an improved near-surface structure. Said aim is achieved by arranging a reducing roll stand (30) in the area of the bending rolls or straightening driver rolls (24) within the continuous casting plant (10).

Abstract: The invention relates to a strip-casting machine for production of a metal strip, comprising two adjacent case-width casting rollers (22, 24), forming a casting gap (15?), with side seals (25) arranged on the front face thereof. The rotating casting rollers are mounted on a machine mount (32). Between the above and the side seals (25), the metal melt, introduced by means of at least one casting tube (13), or similar, is protected by at least one gaseous medium. At least said casting rollers (22, 24) are surrounded on at least the case width and front face thereof as well as the side seals by a preferably multi-component housing (30, 60, 80). An optimal sealing of the casting rollers as well as the metal strip and the metal strip appearing from between the rollers can thus be achieved in a simple manner.

Abstract: The invention relates to a method and an installation for hot-rolling strips using a reversible Steckel rolling frame (8), each side of which is equipped with a respective furnace coiler (9, 10) and a driving mechanism (17,18), provided between the furnace coiler (9, 10) and Steckel rolling frame (8). The aim of the invention is to crop particularly thin, hot strips. To achieve this, the strip is cropped during the reversible rolling process by a single pair of flying cropping shears (20), positioned between one of the driving mechanisms (17) and the Steckel rolling frame (8). The cropping shears comprise in particular a drum blade.

Abstract: The invention relates to a method and a continuous casting device for the direct shaping of a metal strand, in particular a steel cast strand (1) of any format (1d). According to said method, the cast strand (1) is only cooled by a liquid coolant (4) in longitudinal sections (6), where the interior of the cast strand (1) remains liquefied and the temperature of the cast strand (1) in a transition zone (7) upstream of, in and/or downstream of a bending and straightening unit (8) is evened out by an insulation of the exterior surface (1b), essentially without the use of a liquid coolant (4), and by progressive thermal radiation. The cast strand (1) is shaped in a dynamically variable reduction section (9) as a result of the compressive strength that is measured on individual shaping rolls (10) or roll segments (11), depending on the compressive force that can be locally applied.

Abstract: A high-speed shear for cutting a rolled strip to a length and including first upper and second lower blade drums carrying, respectively first and second blades and rotationally connected with each other, drive elements located in front of and behind the first and second drums for advancing the rolled strip, under longitudinal tensioning, through a blade gap between the first and second drums, and support rollers supporting the tensioned strip and providing for lifting of the strip before passing of the second blade and for lowering the strip before passing of the first blade through the blade gap.

Abstract: The invention relates to a roll stand for hot-rolling or cold-rolling metallic strips. The roll stand comprises back-up rolls and work rolls (2, 3; 4, 5) which are respectively positioned in chocks (6; 7) in a rotating manner. Each chock (6; 7) can be displaced on two sides in guiding devices (8) of the column frame (9) for adjusting the roll gap (10) and can be additionally displaced on at least one side for adjusting the play, by means of horizontal piston cylinder units (11) arranged in the column frame (9). The aim of the invention is to completely eliminate the play in the vertical guiding device (8) of the work roll chocks (6; 7) during the rolling.

Abstract: The invention relates to a method for operating a strip casting machine (10), whereby molten metal (18) is poured between two rotatable casting rolls (11, 12). A gaseous film (G) is formed between the respective surfaces (11?, 12?) of the casting rolls and the strip skin (D1, D2, D3) forming on the molten metal, the gas being introduced essentially into the inerting chamber (24 ) above the metal bath. During the casting, a controlled quantity of a gas consisting of argon, nitrogen and/or another gas is introduced into the inerting chamber (24) in such a way that the heat transfer from the strip skin to the casting rolls (11, 12) can be influenced by the thickness of the gaseous film (G) in such a way that the surfaces (11, 12?) of the casting rolls can be provided with or without cavities (51). A smooth surface can thus also be obtained on the strip cast.

Abstract: The invention relates to a method for the weight-accurate filling of ingot molds in a non-iron casting machine, e.g. a copper anode casting machine or a zinc anode casting machine, which is configured in the form of casting wheels that are use for production in a fully mechanized casting operation and are provided with the ingot molds. The aim of the invention is to obtain the desired precise-weight quality of a piece and exact plane parallelism of the bordering surfaces thereof. Said aim is achieved by carrying out the following steps: first, a liquid metal is introduced into an intermediate trough (4, 4?) at a regulated mass flow rate, the continuous dynamic weight increase being simultaneously determined; second, liquid metal is fed into a dosing trough (4, 4?) which is located on each side of the intermediate trough (4, 4?) by alternately tilting the intermediate trough (4, 4?) on one side followed by the other.

Abstract: The invention relates to a method for producing stainless steels, in particular steels containing chromium and chromium-nickel. The method is carried out in a melting device containing a metallurgical vessel, or in a melting device (1) containing at least two vessels (2, 3) for supplying a steel-casting installation, an electric arc furnace process (1) and an air-refining process taking place alternately in the two vessels (2, 3). To improve the efficiency of a method of this type, the aim of the invention is to carry out a reversible treatment of unreduced converter slag in the electric-arc furnace mode. To achieve this, in the first treatment stage, the slag (19) with a high chromium content is melted together with the added charge, the slag is then reduced during the melting process with the silicon and carbon under favorable thermodynamic conditions of the arc, once the slag has reached a minimum temperature of 1,490° C. and the slag is subsequently removed.

Abstract: A dual arbor scrap chopper is disclosed having a number of chopper blades attached to each arbor. The blades are designed to be more easily fitted into a blade recess formed on the arbor, and are preferably designed to provide a blade cutting surface which more closely resembles the optimal elliptical shape without the need for complex cutting patterns. A dual arbor scrap chopper with improved blade performance and ease of blade change-over is provided.

Abstract: A roll stand has upper and lower rotatable working rolls defining a nip that pinches a workpiece strip and upper and lower vertically spaced rotatable backing rolls vertically flanking and engaging the working rolls. A drive includes a motor, upper and lower backing-roll outputs drivable by the motor, and upper and lower working-roll outputs also drivable by the motor. Respective upper and lower backing-roll and working-roll releasable connections are provided between the outputs and the respective rolls. When the working rolls are of large diameter, the backing-roll connections are released to disconnect the backing rolls from the drive and the working-roll connections are engaged to connect the working rolls to the drive and, when the working rolls are of small diameter, the working-roll connections are released to disconnect the working rolls from the drive and the backing-roll connections are engaged to connect the backing rolls to the drive.

Abstract: An apparatus for the continuous casting of metals, especially of steel, is equipped with a base frame (2) carrying a continuous casting mold (1) and an oscillating device (3) disposed on the base frame (2) and with a foot roller frame (4) disposed on the foot end (1a) of the continuous casting mold (1). In order to obtain better protection for the mold region and components disposed downstream thereof, it is proposed that the continuous casting mold (1) together with an oscillation frame (3b) and an oscillating drive (3a) engaging the oscillating frame (3b) be arranged in an upwardly and laterally closed housing (5) and that the foot roller frame (4) fastened on the continuous casting mold (1) extends through a laterally shielding lower housing (6).

Abstract: The invention relates to a device for raising and withdrawing a bearing unit of a back-up roll of a roll stand. Said bearing unit is comprised of a piece to be inserted inside which has a roll pin bearing arranged therein. According to the invention, a change-over device is configured so that it can be temporarily coupled to the bearing unit and is provided for effecting an axial movement toward and away from the back-up roll.