Abstract: A process for continuously casting a thin metal strip controls has jets directed at casting rollers using sensor feedback. Sensor feedback can be taken directly from the rollers, or can be determined indirectly by sensing a condition of the thin metal strip. Surface conditions are controlled over a longitudinal extent of the rollers through locally controlled gas jets. The feedback control of the roller surfaces provides a more uniform casting surface and a more consistent output from the casting surface.

Abstract: A process for the production of austenitic stainless steel strips having as case a good weldability, comprising the operations of: solidification in a mold of a continuous casting apparatus with twin counterrotatng rolls, a strip having a thickness comprised between 1 to 5 mm and having the following composition in percent by weight: Cr 17-20; Ni 6-11; c<0.04; n<0.04; s<0.01; Mn<1.5; Si<1.0; Mo 0-3; Al<0.03; and possibly, Ti, Nb, Ta so that: Ti+0.5(Nb+Ta)>6C-3S with proviso that Ti>6S, or NB+Ta>1C with the proviso that TI<6S; being in any case Nb+Ti+Ta<1.0; the remaining part being substantially Fe with a &dgr;-ferrite volume percentage comprised between 4 and 10% calculated with the formula: &dgr;-ferrite=(Creq/Nieq−0.728)×500/3 wherein: Creq/Nieq=[Cr+Mo+1.5Si+)0.5Nb+0.25Ta+2.5(Al+Ti)+18]/[Ni+30(C+N)+0.

Abstract: A method for continuously casting grain oriented electrical steel is disclosed. This method utilizes a controlled rapid cooling step, such as one using a water spray, to control the grain orientation in the finished product. The product formed not only has the appropriate grain orientation but also has good physical properties, for example, minimized cracking. In this process, after a continuously cast electrical steel strip is formed, the strip undergoes an initial secondary cooling to from about 1150 to about 1250° C., and finally undergoes a rapid secondary cooling (for example, by water spray) at a rate of from about 65° C./second to about 150° C./second to a temperature of no greater than about 950° C.

Abstract: A method for continuously casting metal strip is provided in which a casting pool of molten metal is found in contact with a moving casting surface such that metal solidifies from the pool onto the moving casting surface, wherein the casting surface is provided by a solid coating on a heat conductive body and the coating is formed of a material such that the wetting angle of said molten metal on the casting surface is less than 40° and which has a melting temperature greater that the temperature of the casting surface during metal solidification.

Abstract: Twin roll caster for casting thin steel strip comprises chilled casting rolls 16 mounted on roll supports 104. One of the rolls is fixed and the other is moveable laterally and biased toward the other roll by biasing units 119 acting on the moveable roll supports 104. A casting pool of molten steel is supported on the rolls 16 and the rolls are rotated to produce a solidified steel strip delivered downwardly from the nip between the rolls. A substantially constant gap is maintained between rolls 16 such that unsolidifed molten metal passes through the nip between the solidified shells of the forming strip and solidifies below the nip. The biasing units 119 are effective to apply substantially constant and low biasing forces to the biased roll. The biasing forces may be between the same and slightly more than the force required to balance the hydrostatic pressure of the casting pool and to overcome the mechanical friction involved in moving the biased roll.

Abstract: With a device for a lateral containment of liquid steel between two crystalizing rolls of a casting machine for a stell strip, comprising a refractory skid 4 and a thrust unit 37 for the skid 4, there are provided at least 3 spaced steel plates P1, P1, Pi+1, . . . Pn successively arranged between the skid 4 and a thrust unit 37 and interconnected by means of fixing elements 12 in a staggered arrangement to optimise the contact conditions between the containing plates and the side faces of the corresponding rolls and to ensure excellent uniform pressure distribution on these plates in sliding contact with the rolls allowing the plates to adapt well to the reference surface of the rolls or working conditions. Each fixing element 12 that connects the plate Pi to next plate Pi+1 has associated thereto at least one pair of fixing elements 12 connecting the next plate Pi+1 to the following next plate Pi+2.

Abstract: To produce sheet steel components optimised for loading, a steel strip is cast between two cooled rolls with a variable nip and the thickness of the steel strip is changed by changing the time of contact between the strand shells and the rolls or by changing the cooling intensity of the rolls on the molten steel cast into the gusset formed by the rolls, thereby changing the thickness of the steel strip. Such a strip has a homogeneous structure and can subsequently be given a special quality by hot or cold rolling for its particular purpose of use.

Abstract: The invention relates to a process for manufacturing carbon-steel strip having a thickness of less than or equal to 10 mm directly from liquid steel, by casting said liquid steel between the lateral surfaces, made of copper or copper alloy, of two internally cooled rotating horizontal rolls. Apparatus. Product produced.

Abstract: A refractory plate member (8) for the side containment in continuous casting machines of the type with two counterrotating rollers (1, 2), including two or more overlapped ceramic and/or refractory layers is provided, the plate member (8) is characterized in that the first layer (9, 91) of said plate member (8) is made of a material that is easily wearable under the action of said rolls (1, 2) during the starting step, and in that the second layer (10, 101) underlying the first layer is made of a ceramic and/or refractory and/or carbon material having a very high wear and thermal shock resistance and self-lubricating properties.

Abstract: Disclosed is a method and apparatus for continuously casting a metal strip. A casting pool of molten metal is formed, and a metal strip is solidified onto a casting surface. The temperature of the casting surface is maintained above a predetermined critical value. By maintaining the surface temperature above the predetermined critical value, either the heat transfer uniformity or the heat transfer capacity or both are improved.

Abstract: A process for the production of low carbon steel strips having a good combination of strength an formability, as cast, and a good weldability after the pickling by usual processes, comprising the following steps: casting, in a twin rolls continuous casting machine (1) comprising pinch rolls (3), a strip with a thickness comprised between 1 and 8 mm, having the following composition as weight percentage of the total weight: C 0.02-0.10; Mn 0.1-0.6; Si 0.02-0.35; Al 0.01-0.05; S<0.015; P<0.02; Cr 0.05-0.35; Ni 0.05-0.3; N 0.003-0.012; and, optionally, Ti<0.03; V<0.10; Nb<0.035, the remaining part being substantially Fe; cooling the strip in the area comprised between the casting-rolls and the pinch rolls (3); hot deforming the strip cast through said pinch rolls (3) at a temperature comprised between 1000 and 1300° C. until reaching a thickness reduction less than 15%, in order to encourage the closing of the shrinkage porosites; cooling the strip at a speed comprised between 5 and 80° C.

Abstract: In twin roll casting of steel strip, molten steel is introduced into the nip between parallel casting rolls to create a casting pool supported on casting surfaces of the rolls and the rolls are rotated to deliver solidified strip downwardly from the nip. Casting surfaces are textured by a random pattern of discrete projections at least some of which include peaks having a surface distribution of between 5 and 200 projections per mm2 and an average height of at least 10 microns. The random texture may be produced by grit blasting the casting surfaces on a substrate covered by a protective coating. Alternatively the texture may be produced by chemical deposition or electrodeposition of a coating onto a substrate to form the casting surfaces.

Abstract: The invention concerns a device for pressing a side wall (1) of an installation for continuous casting of metal strips between two cooling drums with horizontal axes against the planar surfaces of the cylinders, comprising three thrust member connected to a mounting frame (3) maintained in a fixed position, exerting their action on the rear face of a plate (2) on the front face whereof is fixed the side wall (1) or on the rear face of the side wall (1), said action being oriented along a substantially horizontal direction (Oy) parallel to the axes of the drums and being exerted via means connecting each of said thrust members on said plate. Said connection means of a first thrust member enable a relative displacement in translation of said thrust A-4 member and of the plate (2) or of the side wall (1) being along a horizontal direction (Ox) a=parallel to the plane of the planar surfaces of the drums and along a vertical direction (Oz) parallel to the plane of the planar surfaces of the drums.

Abstract: A process for manufacturing carbon-steel strip having a thickness of less than or equal to 10 mm directly from liquid steel, by casting said liquid steel between the lateral surfaces, made of copper or copper alloy, of two internally cooled rotating horizontal rolls.

Abstract: A side wall closing the casting space of an installation for continuous casting of thin metal strips between unwinding cooled walls, including a support plate, on the rear face of which thrust members exert their action, and an active face arranged against the front face of the support plate. Lateral portions are designed to be worn by contact with the edges of the cooled walls over a maximum depth “e” and a length “1”. The support plate and the active part are urged in contact with each other in a way enabling them to be disengaged non-destructively. The support plate front face has in its central part a recess whereof the depth is greater than “e” and the outer edges of the front face have a general shape which matches that of the outer edges of the active part and have a length less than “1”.

Abstract: A twin-drum continuous casting apparatus for casting a metal sheet (4) by supplying molten metal (3) to a pouring basin formed by a pair of cooling drums (1) rotating in opposite directions, and side gates (2), to cool the molten metal (3) by contact with surfaces of the cooling drums (1), thereby forming a solidified shell. The cooling drum (1) is formed from a drum body (11) having shaft portions at opposite end portions, and a drum sleeve (10) fitted on an outer peripheral portion of the drum body (11). Also, means is provided for preventing various adverse influences due to differences in thermal expansion of constituent members of the drum body (11) during casting. Thus, the reliability of the apparatus is increased, and the quality of casting is improved.

Abstract: Dimples, preferably 40 to 200 &mgr;m in average depth and 0.5 to 3 mm in diameter of circle equivalent, are formed on the peripheral surface of a cooling drum, adjacent to each other at the rims of the dimples; and fine humps (preferably, fine humps 1 to 50 &mgr;m in height and 5 to 200 &mgr;m in diameter of circle equivalent on the surfaces of the dimples and/or fine humps 1 to 50 &mgr;m in height and 30 to 200 &mgr;m in diameter of circle equivalent at the rims of the dimples), fine holes (preferably, fine holes 5 &mgr;m or more in depth and 10 to 200 &mgr;m in diameter of circle equivalent), or fine unevenness (preferably, fine unevenness 1 to 50 &mgr;m in average depth and 10 to 200 &mgr;m in diameter of circle equivalent) are formed at the rims and/or on the indented surfaces of said dimples.

Abstract: Twin roll casting of metal strip (20) by rotation of parallel casting rolls (16) supplied with molten metal through distributor (19a) and delivery nozzle (19b). X-ray scanner (44) continuously scans the thickness of strip (20) to produce a signal which is a continuous measure of thickness variation along the strip due to eccentricities of the casting rolls (16). This signal controls operation of roll drive motors (53) to impose a pattern of speed variation on the rolls so as to reduce the amplitude of the thickness variations.

Abstract: Twin roll strip caster comprising parallel casting rolls one of which is mounted on moveable roll supports which allow it to move bodily toward and away from the other roll. A pair of roll biasing units comprising compression act on roll supports to bias the moving roll toward the other roll. Biasing units comprise compression springs acting on roll supports through thrust transmission structures and thrust reaction structures. The positions of thrust reaction structures are set by hydraulic cylinder units operable to vary the position of each reaction structure to replicate movements of the respective thrust transmission structure so as to maintain a constant compression of the biasing springs regardless of lateral movements of the roll supports.

Abstract: A method of continuous casting aluminum alloys between a pair of rolls. Molten aluminum alloy is delivered to a roll bite between the rolls and passes into the roll nip in a semi-molten state. A solid strip of cast aluminum alloy exits the nip at speeds of about 25 to about 400 feet per minute. Thin gauge (0.07-0.25 inch) strip may be produced at rates of up to 2000 pounds per hour per inch of cast strip width.

Abstract: A twin roil caster (11) produces thin steel strip (12) which passes through a first enclosure (37) to a pinch roil stand (14) including pinch rolls (50) through which the strip passes into a second enclosure (61). The strip passes horizontally through enclosure (61) to an in-line hot rolling mill (16) which closes the exit end of enclosure (61) and hot rolls the strip as it exits that enclosure. Enclosures (37) and (61) are sealed against ingress of atmospheric air and both maintain oxygen levels less than the surrounding atmosphere to reduce formation of scale on the strip. The second chamber (61) is fitted with water spray nozzles (67, 68) operable to spray fine mist of water droplets onto the upper face of the strip as it passes through that enclosure thereby to generate steam producing a superatmospheric pressure within the enclosure preventing ingress of atmospheric air.

Abstract: A tundish has an outlet and outlet shroud through which to deliver molten metal to a caster. The tundish is preheated at a heating station and moved to a casting station while supported on a moveable tundish car such that the tundish outlet is induced to a set position relative to the car and such that the tundish is located against horizontal movement at the position of a vertical central line of the tundish outlet but is free to move thermally about that position. Tundish is supported in a raised position on hoists during preheating and movement to the casting station and then lowered by actuation of the hoists to allow insertion of an outlet shroud into a metal distributor vessel of the caster.

Abstract: A method and apparatus for continuously casting metal strip are provided, in which molten metal is introduced between a pair of parallel chilled casting rolls via an elongate metal delivery nozzle disposed above and extending along the nip between the casting rolls to form a casting pool supported on the rolls and the rolls are contra-rotated to produce the solidified strip. The molten metal is then delivered into a trough of the nozzle through an entry nozzle having an upper inlet end for receiving molten metal from a tundish, and a lower outlet end extending into the trough of the delivery nozzle, and the outlet end of the entry nozzle has a bottom wall, elongated side walls spaced inwardly from the side walls of the delivery nozzle and outlets for molten metal in the side walls.

Abstract: The present invention includes a method and apparatus for enhancing the quality of cast metal being cast in a continuous casting process. In particular, the method and apparatus of the present invention combines temperature and quality control sensing to achieve closed-loop control of the cooling of molten metal in a continuous caster.

Abstract: In a method of preventing contact of oxygen with a metal melt, metal melt flows into a casting chamber bounded by walls (1, 2, 13) and leaves this chamber as a stream. In order to completely prevent contact of oxygen with a metal melt and thus reoxidation, oxygen attempting to enter via any gaps (18) between the walls (1, 2, 13) and/or adhering to the walls (1, 2) is reacted to form a compound which is not injurious to the metal melt (20).

Abstract: The invention relates to a process for producing metal foams and to the metal bodies in foam form which are obtained in this way.

Abstract: Method of preventing contact of oxygen with a metal melt during continuous casting, the metal melt flows into a casting chamber bounded by rolls and a hood and leaves this chamber as a stream. To completely prevent contact of oxygen with the metal melt and thus reoxidation, oxygen attempting to enter via any gaps between the walls and/or adhering to the walls is removed by suction applied at a succession of suction stages at the periphery of each roll before a gap between the hood and the roll at the top of the casting chamber. Inert gas may then flow to the rolls near the gap.

Abstract: A process for manufacturing a strip of aluminum alloy having high surface homogeneity with an upper side showing after a 1 &mgr;m thick sulphur anodic treatment, an optical roughness value SN measured on three 5 cm longitudinal sections and three 5 cm transverse sections, such that its mean variation on each section, defined by the ratio: (Maximum SN−minimum SN)/Mean SN is less than 20%, and the difference &Dgr;SN=SN max−SN min is less than 20. The strip is manufactured by continuous casting between two cooled rolls from a casting tank containing the liquid metal connected to an injector, and feeding the liquid metal into the gap between the two rolls. The injector has an upper lip recessed by at least 2 mm with reference to a lower lip of the injector.

Abstract: Apparatus for continuously casting metal strip comprises a pair of parallel casting rolls (16). In use of the apparatus molten metal is delivered between the casting rolls which are rotated to deliver cast strip product downwardly from the rolls. Casting rolls (16) are mounted on a roll module (13) installed in and removable from the caster as a unit. Module (13) is movable horizontally from a stand-by position to an intermediate position beneath a casting position of the rolls and can be hoisted from the intermediate position by operation of hoists (71) to lift the rolls (16) into their casting position.

Abstract: A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatically map the product specifications to process parameters/set points for controlling the continuous steel strip casting process in a manner to produce the customer ordered product, and in one embodiment produces a process change report detailing such process parameters/set points for operator use in physically implementing such process parameters/set points in the strip casting process. Alternatively, the computer may provide the process parameters/set points directly to the strip casting process for automatic control thereof in producing the customer ordered steel product.

Abstract: There is provided a magnesium alloy molded product being excellent in corrosion resistance. The magnesium alloy molded product being excellent in corrosion resistance and capable of being easily recycled is manufactured by forming an aluminum layer on a surface of a magnesium alloy molded body and then forming an anticorrosive film layer on the surface of the aluminum layer. In addition, a magnesium alloy molded product being excellent in corrosion resistance and having a brilliant anticorrosive structure is manufactured by forming a transparent anticorrosive film consisting of an organic acid amine salt on a cut surface of a magnesium alloy molded body and then forming a transparent painted film on the transparent anticorrosive film.

Abstract: Continuous casting device and method with rollers for plane products such as strip (13) or sheet, comprising counter-rotating rollers (11) immersed in a receptacle (14) containing molten metal (15), said receptacle (14) including a bottom (114) and side walls (214), said rollers (11) being arranged parallel and adjacent to define a transit gap (12) through which the strip (13) to be produced is extracted, the device comprising holding elements (19) of the electromagnetic type arranged in cooperation with each of the ends of said rollers (11), said holding elements (19) having an inner edge, an outer edge and a curved shape suitable to surround, without contact, at least partly the surface of said rollers (11) immersed in said molten metal (15), said holding elements (19) comprising at least a coil (29) suitable to be passed through by an alternating current to generate a magnetic field in said molten metal (15) and generating currents induced therein in order to obtain the lateral confinement of said molten m

Abstract: The present invention is concerned with the fabrication process of low or high enrichment uranium and uranium alloy foil, and the fabrication apparatus therefor. Uranium (U) and uranium alloy [U—(A)Q—(B)X—(C)Y (Q: Al, Fe, Ni, Si, Cr, Zr element, X: Al, Fe, Ni, Si, Cr, Zr element, Y: Al, Fe, Ni, Si, Cr, Zr element, Q≠X≠Y, (A)≦1 wt %, (B)≦1 wt %, (C)≦1 wt %)] foil are directly obtained from a melt, not through a vacuum induction melting & casting, ingot cutting, hot-rolling and heat-treatment process, but through melt spinning or a twin-roll casting process. Major advantages have been obtained as follows: 1) a simplified process without the hot-rolling process and heat-treatment process, 2) an improvement in productivity and process economics in foil fabrication, and 3) a high purity and a high quality of the foil.

Abstract: The present invention provides an improvement to the plates for the side containing in apparatuses for the continuous casting of thin flat products, said plates comprising: at least one insert (8) of a ceramic material; a plurality of joints (11) for the thermal expansion, the joints being constituted of a ceramic fibers material; a first casting (9) of a silica-alumina material containing ceramic fibers; a second casting (10) of a silica-alumina material having a high content of ZrO2; and a third casting (12) of a SiC-based thixotropic material; the arrangement being such that said at least a ceramic insert is arranged on said third casting (12) of a thixotropic material so that it assumes a substantially triangular shape, said first silica-alumina casting (9) based on a ceramic fibers material is arranged on said third casting (12) at the exterior area with respect to said at least a ceramic insert, said second casting (10) of silica-alumina material having a high contents of ZrO2 is arranged on said third

Abstract: Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip and hot rolling the cast strip within a temperature range such that the strip passes through the Ar3 transformation temperature from austenite to ferrite under strain during rolling, thereby producing a strip having a yield strength above 400 Mpa and an elongation in excess of 30%. The cast steel strip has desired microstructures.

Abstract: Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 100-300 micron width; and providing desired yield strength in the cast strip by cooling the strip to transform the austenite grains to ferrite in a temperature range between 850° C. and 400° C. at a selected cooling rate of at least 0.01 ° C./sec to produce a microstructure that provides a strip having a yield strength of at least 200 MPa. The low carbon steel produced desired microstructure.

Abstract: A plain carbon steel strip is continuously cast in a twin roll caster and passes to a run out table on which it is subjected to accelerated cooling by means of cooling headers whereby it is cooled to transform the strip from austenite to ferrite at a temperature range between 850° C. and 400° C. at a cooling rate of not less than 90° C./sec, such that the strip has a yield strength of greater than 450 MPa. The strip after casting and before cooling is passed through a hot rolling mill to reduce the thickness of strip by at least 15% and up to 50%.

Abstract: A variable tip width adjustment system for use in continuous casting of a molten metal includes a feed tip nozzle downstream from a distribution box, the nozzle including a pair of feed tip nozzle members spaced apart to define a feed tip opening at a downstream edge of the feed tip nozzle members and a pair of end dams located on a drive side and an operator side of the roll casters, the end dams slidably engaged inside the tip nozzle, each dam being axially moveable in two directions inside the tip nozzle. The end dams are preferably actuated using a programmable controller and a stepper motor that is responsive to the signals of the programmable controller. The stepper motor is preferably connected to the end dam via flex connector and a connecting guide rod directed through a guide tube.

Abstract: Continuous strip casting device comprises a pair of parallel casting rolls onto which molten metal is supplied by metal supply means. Casting rolls are enclosed by a casting chamber into which hot strip is delivered downwardly from the casting rolls. Strip passes downwardly into a cooling chamber where it can either fall into a moveable scrap box at the bottom of chamber or be guided by operation of moveable apron through an exit door from chamber into a heat exchange chamber provided with heaters. A pair of seal rolls are moveable in a seal chamber to form a seal between chambers and are provided with respective gas inlets to admit oxidation inhibiting gas into those chambers. Scrap box is moveable into and out of the bottom of chamber via a scrap box exchange chamber fitted with an airtight door.

Abstract: A method for continuously casting thin metal products, the method comprising the operations of pre-heating a pair of refractory plates (7) for the lateral containment of a bath of molten metal constituted of a pair of counter-rotating rolls (1, 2) and of abutting said pair of plates (7) towards each lateral surface of the ends of said pair of rolls (1, 2), characterized in that it comprises the operations of applying a controlled elastic or elastic/plastic deformation to said pair of plates (7) at the contacting arc between the surface of the plates (7) and the peripheral portion of the ends of said rolls (1, 2), and controlling said elastic and/or elastic-plastic deformation of said pair of plates (7) during the whole casting process, so as to minimize the surface wear of the plates (7) and of the ends of the rolls (1, 2), and to guarantee the maintainment of a predetermined distance between said rolls (1, 2) and said plates (7) lower than a predetermined value, and to minimize the occurrence of leaks-of mol

Abstract: The invention relates to a method for continuously casting thin metal products, the method comprising the operations of pre-heating a pair of refractory plates (7) for the lateral containment of a bath of molten metal constituted of a pair of counter-rotating rolls (1, 2) and of abutting said pair of plates (7) towards each lateral surface of the ends of said pair of rolls (1, 2), characterized in that it comprises the operations of applying a controlled elastic or elastic/plastic deformation to said pair of plates (7) at the contacting arc between the surface of the plates (7) and the peripheral portion of the ends of said rolls (1, 2), and controlling said elastic and/or elastic-plastic deformation of said pair of plates (7) during the whole casting process, so as to minimize the surface wear of the plates (7) and of the ends of the rolls (1, 2), and to guarantee the maintainment of a predetermined distance between said rolls (1, 2) and said plates (7) lower than a predetermined value, and to minimize the o

Abstract: Twin roll caster for casting thin steel strip comprises chilled casting rolls 16 mounted on roll supports 104. One of the rolls is fixed and the other is moveable laterally and biased toward the other roll by biasing units 119 acting on the moveable roll supports 104. A casting pool of molten steel is supported on the rolls 16 and the rolls are rotated to produce a solidified steel strip delivered downwardly from the nip between the rolls. A substantially constant gap is maintained between rolls 16 such that unsolidifed molten metal passes through the nip between the solidified shells of the forming strip and solidifies below the nip. The biasing units 119 are effective to apply substantially constant and low biasing forces to the biased roll. The biasing forces may be between the same and slightly more than the force required to balance the hydrostatic pressure of the casting pool and to overcome the mechanical friction involved in moving the biased roll.

Abstract: Continuous casting method and device (10) with rolls for plane products such as strips (13), wherein counter-rotating rolls (11) are partly immersed in a container (21) containing molten metal (22), said rolls (11) being arranged parallel and adjacent to define a gap (12) through which the strip (13) to be produced is extracted upward, said strip (13) being formed by the union of two semi-skins which are formed on the respective surfaces of said rolls (11) and are joined together in correspondence with a line of contact (30), said method providing that shearing means (27), arranged substantially in cooperation with the periphery of said rolls (11), act on the sides of said strip (13) to define at least the width of said strip (13) extracted from said rolls (11).

Abstract: An edge dam position control method and device in a twin roll strip casting process calculates the reduction ratio and rolling force of rolls to obtain the height of a solidification point, and adjusting the height of an edge dam during casting to correspond to the obtained height of the solidification point. It minimizes the force applied to the edge dam during casting, reduces the degree of wear of the edge dam, and improves the quality of edge portions of both sides of the strip.

Abstract: The invention addresses the problem of edge bulging and breakout of as cast strip due to a decrease of perfect solid phase shell thickness of the strip caused by heat recuperation of the unsolidified portion of the strip, by providing a chamber 19 which encloses the travel path of a strip 8 delivered from a pair of chilled rolls 1a and 1b, a pair of chilled blocks 29a arranged in the chamber to be positioned near a nip between the chilled rolls 1a and 1b, with each chilled block 29a being shaped for loose fitting over an edge of a strip 8 and being capable of injecting cooling gas toward the edge of the strip 8. When the strip 8 is to be continuously cast, the interior of the chamber 19 provides an inert gas atmosphere, in which the cooling gas injected by the cooling blocks 29a injection-cools the edges of the strip 8 delivered from the chilled rolls 1a and 1b at a position near the nip between the chilled rolls 1a and 1b.

Abstract: Continuous casting of steel strip in twin-roll caster comprising casting rolls (16). Molten steel is delivered by a delivery system comprising a distributor (18) and delivery nozzle (19) to casting pool (68) supported above the nip (69) between the casting rolls (16) which are rotated to deliver a solidified steel strip (20) downwardly from the nip. The casting pool is confined by side closures (56) comprising refractory plates to contact and dam the molten steel. To minimise reactions between carbon in the pool closures with oxygen containing compounds in the casting pool the side closure plates are made of refractory material containing a major proportion of a refractory aggregate and a minor proportion of graphite of at least 96% purity in the range of 10 to 30% by weight and an anti-oxidant additive being aluminium or an alloy thereof. The refractory aggregate may be comprised mainly of alumina.

Abstract: Twin roll strip casting apparatus in which a pair of pool confining side plates (56) engage end surfaces of casting rolls (16) to form side confining closures for the pool. Plates (56) are mounted in side plate holders (82) connected to horizontally acting thrusters (83) which apply inward closure forces to the side plates (56). Thrusters (83) are mounted on a pair of carriages (101) disposed one at each end of the casting roll assembly and movable toward and away from one another to enable the spacing between them to be adjusted so that the carriages (101) can be preset before a casting operation to suit the width of the casting rolls (16). Carriages (101) are mounted on a central frame structure (103) which sits over the casting rolls (16).

Abstract: An improved molten metal feed system is provided for high speed, continuous casting of metals and alloys. The feed system includes a distributor box having an insulative lining which supports an internal flow distributor board. The flow distributor board includes a plurality of openings of various sizes and shapes spaced apart along the width of the board. The presence of the flow distributor board effectively separates the box into lower and upper sections and restricts the flow of liquid metal through the board and thus, forces entering liquid metal to fill the entire width of the distributor box below the flow distributor board. In addition, the liquid metal is stabilized across the width of the distributor box resulting in a balanced temperature gradient. Once the lower section of the distributor box is filled, the metal flows through the openings in the board into the upper section of the distributor box and into the feed tip nozzle.

Abstract: A method for producing coated hot-rolled or cold-rolled products, particularly steel strip, and an apparatus for carrying out the method, wherein thin strip is cast especially by a travelling mold and the cast strip is guided on-line as a master strip into an inversion casting plant for strip coating, the surface of the coated strip is smoothed with rolls, and if necessary, the thickness of the coated and smoothed strip is reduced in a rolling process.

Abstract: A side dam assembly for a continuous casting apparatus for continuously casting thin steel strips between casting rolls. The side dam assembly has a side dam for bearing directly against the rolls of the casting apparatus for preventing leakage of molten metal therebetween. The side dam is attached by a pair of belts to an insulating refractory plate which is carried by a cooled panel. To allow axial motion, one of the belts is not rigidly affixed to either the insulating refractory plate or the side dam. The cooled panel is carried by a thrust plate and is urged toward the rolls by biasing elements which preferably comprise a plurality of pistons urged outwardly from the thrust plate by springs. Preferably, the biasing elements are constructed and arranged so that they are distributed over a zone of shape corresponding to that of the side dam and are capable of exerting on the side dam thrust forces independently of one another.