摘要:
A method of producing cast strands (2) in shapes of billets or ingots wherein the strand (2) is guided between pairs of rollers (4 to n) and is formed in the straightening region (A), with the use of straightening profiled rollers (4 to 6) with one-sided or multiple-sided projections (h, b) or recesses (-h, b), and in the casting direction (10), downstream of the straightening region, the strand is subjected to a soft-reduction with at least one roller pair (7 to 9) with thickness-reducing smooth rollers. The invention also relates to a casting machine provided with correspondingly formed rollers.
摘要:
The invention relates to a continuous casting mold, in particular a thin slab mold in which the flow of a liquid metal in the mold is influenced by a magnetic field generated by permanent magnets, wherein the permanent magnets have, over the width and/or height thereof, different magnetic strengths or are spaced from each other by different distances for a different field strength. To provide for variation of the magnetic field strength, the permanent magnets are differently adjusted in groups for changing a field strength distribution.
摘要:
The invention relates to an electromagnetic braking device for molten steel that flows into a continuous casting mould (1). Said device comprises at least one solenoid (2) with a ferromagnetic core (5) that is allocated to the broad sides (3, 4) of the mould. To reduce the oscillating mass and at the same time increase the strength of the magnetic field, the core (5) consists of a primary part (6) that houses the solenoid (2) and can be displaced at a distance from the broad side walls (3, 4) and attachments (8, 8′) that are fixed in water tanks (7, 7′) of the mould (1). When combined in their operating position, the core parts (6, 8) produce U-shaped yokes (9, 9′) for generating a closed magnetic flux (10) and when moved apart, cause the magnetic flux (10) to be interrupted.
摘要:
A billet guiding unit of a continuous casting plant for thin slabs includes guide rolls supported on oppositely located frames, wherein the frames are tensioned relative to each other against stop surfaces by means of tension rods. Hydraulic cylinders for extending or stretching the tension rods are mounted between corresponding stop surfaces of the frames. The distance between oppositely located rows of rolls of the frames are corrected by determining a lower deviation side of the slab by carrying out a continuous measurement of the thickness of the slab sides, by determining from the difference of the dimensions the required extension of the tension rods on the lower deviation side and by applying to the hydraulic cylinders the pressure required for the extension of the tension rods.
摘要:
An arrangement for operating a continuous casting plant for the manufacture of thin slabs for hot strip rolling includes at least one pair of reducing rolls which follow a continuous casting mold. Adjustable strand guide elements are arranged following the pair of reducing rolls. A method of operating the continuous casting plant includes adjusting the pair of reducing rolls, after a predetermined length of the hot strand has traveled through the pair of reducing rolls, to a smaller gap between the reducing rolls which causes the liquid phase to be squeezed off, and deforming the hot strand by means of the pair of reducing rolls to a start-up size which has a thickness which is smaller than the thickness of the desired final size, and subsequently adjusting, preferably successively, the strand guide segments and the pair of reducing rolls to the thickness of the final size as soon as the start-up size having the smaller thickness has completely reached the range of adjustment of the respective strand guide segments and the pair of reducing rolls.
摘要:
A continuous-casting mold for strip steel has cooled broad side walls have inner surfaces bridged by and forming an upwardly open cavity with narrow walls. Liquid metal is continuously introduced from the lower end of a pouring tube into the top of and withdrawn from the bottom of the mold such that the liquid metal has an upper surface at a predetermined normally stationary level in the mold. The inner surfaces are each formed by a planar lower portion wholly below the level, a central portion offset inward from the end walls and extending from the respective lower portion up above the level, a pair of planar intermediate portions coplanar with the respective lower portion, wholly below the level, and each extending between the respective central portion and a respective one of the narrow walls, and a pair of planar upper portions coplanar with each other, extending from the respective intermediate portions upward past the level, and flanking the respective central portion above the respective intermediate portions. The upper portions of each of the side walls diverge upward from and form an angle of between 1.degree. and 3.degree. with a vertical symmetry plane bisecting the end walls. The lower portions extend parallel to each other the full width of the mold between the end walls and the central portions flank the pouring tube lower end and diverge upward. The narrow walls are of uniform horizontal width below the upper portions and are of a width increasing uniformly upward along the upper portions.
摘要:
A mold is provided for continuously casting strip metal in which the mold cavity is formed with a flared mouth the internal surfaces of which terminate at their lower end along a transversely extending line, and the reflex angles which the mold along that line at a maximum near the center line of the mold and gradually diminishing toward the side edges of the mold.
摘要:
A mold has two broad side walls opposing each other at a distance and being connected to two narrow walls which oppose each other and are arranged between the side walls. The upper portion of the side walls defines a funnel-shaped casting area whereby the narrow walls are arranged beyond the casting area so that the side walls extend parallel towards the narrow walls at the distance which corresponds to the width of the cast steel.
摘要:
A roller apron for a continuous casting installation and serving to support a partially solidified strand cast at a continuous casting installation, especially a steel strand. The roller apron comprises a number of pairs of rollers of different diameter arranged in succession in the direction of travel of the strand. The cast strand is preferably a slab and there are arranged in alternate sequence in the roller apron larger size rollers mounted externally of the maximum slab width and one or more smaller size rollers, wherein each such smaller size roller has at least one of its bearings or supports mounted within the maximum slab width.
摘要:
A roller apron framework or strand guide framework for supporting a partially solidified strand in a continuous casting installation, especially for casting slabs, comprising a number of rollers mounted within the maximum slab width. Guide rings are arranged in overhung position upon bearing journals provided for an intermediate portion of the guide rollers, the bearing journals protruding outwardly past the bearings of the rollers.