Abstract: A continuous casting device includes a mould, a nozzle, and an electromagnetic stirrer provided around the nozzle above the mould, the stirrer including a core of a magnetic material that extends circumferentially around the nozzle and a plurality of windings wound around the core. The windings are wound around a cross section of the core as seen in the circumferential direction of the core.

Abstract: The present invention provides a continuous casting method of steel preventing alumina and other nonmetallic inclusions becoming causes of slivers and argon bubbles becoming causes of blowholes from being entrained and thereby enabling the production of a cast slab superior in surface and internal quality, that is, one giving an inside bore 21 of an immersion nozzle 21 a horizontal sectional shape of an elliptical shape or oblong shape with a length ratio DL/DS of that long axis DL and short axis DS of 1.2 to 3.8, making a direction of that long axis substantially parallel to a long side direction of the casting mold 3, and making the sliding direction of the sliding nozzle 1 a direction perpendicular to said long axis to supply the molten steel in the casting mold 3. Note that a ratio S1/S0 of a sectional area Si at a smallest sectional area part 23 of the inside bore 21 and a sectional area S0 of a nozzle hole 11 of the sliding nozzle 1 is made 0.5 to 0.

Abstract: A method and an apparatus are provided for electromagnetic stirring during a continuous casting process, especially for casting a billet and bloom of medium and high carbon steels. The method and apparatus provide a higher surface quality of the ingot, reduce the entrapping of nonmetallic inclusions into the ingot, and suppress issues regarding central segregation and central porosity. The method provides an improvement in the stirring process from the meniscus to the crater end—and relates to in-mold stirring and stirring in a zone of secondary cooling and up to the crater end. The in-mold stirring is geared towards the suppression of meniscus disturbance, for submerged casting, in particular, the reducing of helical and axial velocity components of the molten steel, the lowering of the initial solidification point to avoid the touching of a shell edge with the slag ring, and a decrease of oscillation marks.

Abstract: A process for continuous casting of slabs or other metal products of elongate cross section, for example made of steel, in which a molten metal is poured into a cooled mold, and the externally solidified product is continuously extracted from the mold and guided in a secondary cooling zone downstream of the mold. To obtain a cast product exhibiting predominantly equiaxed solidification, the product extracted from the mold is subjected to electromagnetic stirring in segment zero of the secondary cooling zone by at least two stirrer-rolls incorporated into the segment zero.

Abstract: When a molten steel flow velocity (u) on a bath surface is higher than a mold-powder entrainment critical flow velocity of 0.32 m/sec, the molten steel flow velocity (u) is controlled to a predetermined molten steel flow velocity by applying a shifting magnetic field to impart a braking force to a discharge flow from an immersion nozzle. When the molten steel flow velocity (u) is lower than an inclusion-adherence critical flow velocity of 0.20 m/sec and is higher than or equal to a bath-surface skinning critical flow velocity of 0.10 m/sec, the molten steel flow velocity (u) is controlled to the range of 0.20-0.32 m/sec by applying a shifting magnetic field to rotate the intra-mold molten steel in a horizontal direction. When the molten steel flow velocity (u) is lower than the inclusion-adherence critical flow velocity, the molten steel flow velocity (u) is controlled to the range of 0.20-0.

Abstract: A method and apparatus for alternating pouring into molds, casts or refining hearths from a common hearth in a furnace. The apparatus provides a main hearth, a plurality of optional refining hearths, and a plurality of casting molds or direct molds whereby the refining hearths and molds define at least two separate ingot making lines. The main hearth alternatively pours into a first ingot making line while the other line is prepared, and vice versa allowing for continuous melting.

Abstract: At least three electromagnets are disposed along the longitudinal direction of a mold. While the electromagnets generate a vibrating magnetic field, peak positions of the vibrating magnetic field is shifted in the longitudinal direction of the mold.

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: In a mold for the continuous casting of flat metal products with a submerged nozzle having lateral outlets, said mold being equipped on each of its long sides 3 with a pair of linear inductors generating a magnetic field that travels horizontally over the width of said long side and are placed on either side of the casting nozzle 5, this method for adjusting the stirring mode is characterized: in that, since the inductors 10a to 11b are mounted in pairs so as to slide vertically over the height of the mold, said inductors, by being moved, pass from a low stirring position LP for assistance to the incoming jets of liquid metal, located level with the outlets 17 of the nozzle, to a high stirring position HP for making the cast liquid metal rotate about the casting axis, located level with the meniscus 9 of the liquid metal in the mold, and vice versa; and in that, on passing from one position to the other, the connections for the inductors to the phases of the power supply 7 are modified so as to reverse the

Abstract: An apparatus for continuous casting of magnesium billets or slabs using an electromagnetic field, and a method thereof compensates small solidification latent heat of magnesium, controls a solidification speed, and stirs molten metal within a mold via an electromagnetic field, thereby enabling continuous casting. The apparatus comprises a mold for continuous casting an as-cast billet or slab, a coil positioned outside the mold and adapted to allow electric current to be applied thereto, and a cooling nozzle positioned outside the mold and the as-cast billet or slab. During casting, electric current having a frequency of 2˜1,000 D or electric current of 50˜10,000 A having a frequency of 200˜200,000 D is applied to the coil. A magnesium billet or slab having enhanced inner quality can be produced at a high casting speed without surface defects by applying a low frequency or high frequency electromagnetic field to the mold during continuous casting of magnesium.

Abstract: A method and an apparatus are provided for electromagnetic stirring during a continuous casting process, especially for casting a billet and bloom of medium and high carbon steels. The method and apparatus provide a higher surface quality of the ingot, reduce the entrapping of nonmetallic inclusions into the ingot, and suppress issues regarding central segregation and central porosity. The method provides an improvement in the stirring process from the meniscus to the crater end—and relates to in-mold stirring and stirring in a zone of secondary cooling and up to the crater end. The in-mold stirring is geared towards the suppression of meniscus disturbance, for submerged casting, in particular, the reducing of helical and axial velocity components of the molten steel, the lowering of the initial solidification point to avoid the touching of a shell edge with the slag ring, and a decrease of oscillation marks.

Abstract: The present invention provides a low carbon steel sheet and a low carbon steel slab on which formation of surface defects can be surely prevented by preventing aggregation of inclusions in the molten steel and finely dispersing inclusions in the steel sheet or slab, and a process for producing the steel sheet and slab. The present invention provides a process comprising the steps of decarburizing a molten steel so as to produce a carbon concentration of up to 0.01% by mass, pre-deoxidizing the molten steel by adding Al thereto so as to produce a dissolved oxygen concentration from 0.01 to 0.04% by mass, adding thereto Ti and at least La and/or Ce, and casting the molten steel, and a steel sheet and a steel slab obtained by the process.

Abstract: An insulating coating (6) formed of engineering plastic with high heat resistance, high-pressure resistance, and chemical resistance is formed on a surface of a water-level detecting electrode part (3) of an electrode rod for detecting water-level (1) attached to penetrate a metal container (5) communicating with a boiler (7) and including an external power supply connecting terminal part (2) projecting outside the container (5) and the water-level detecting electrode part (3) projecting inside the container (5). One side of a power supply (27) is connected to the external power supply connecting terminal part (2), and another side of the power supply (27) is connected to the container (5) for energization. An electrostatic capacity between the water-level detecting electrode part (3) and the container (5) is measured by using the insulating coating (6) formed on the surface of the water-level detecting electrode part (3) as a dielectric.

Abstract: A device for continuous or semi-continuous casting of metals, comprising a casting mold (1) which is open in both ends in the casting direction, means (2) for supplying melt to the mold (1), a first electromagnetic induction coil (4) energized by A.C. current and adapted to induce a stirring motion to the melt (7) in the mold (1), and a second electromagnetic induction coil (3) arranged upstream of the first induction coil (4) and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface (5) of the melt. The second induction coil (3) is arranged to be interchangeably energized by either D.C. or A.C. current. The invention also relates to methods for control of stirring motion in a casting mold (1).

Abstract: The invention concerns a continuous casting ingot mold equipped with an immersed nozzle (3) provided with lateral outlets (2) opposite the small sides (5) of the ingot mold, and whereof the pattern of molten metal flows can be naturally in single loop or double loop, or even unstable. The invention is characterized in that it consists in using sliding magnetic fields acting, at the nozzle, on the flows of liquid metal reaching the ingot mold through the nozzle orifices, said magnetic fields being generated by polyphase linear electromagnetic field windings (14, 14?, 15, 15?) arranged opposite at least one side of the ingot mold on either side of the nozzle, preferably opposite one large side and advantageously both, so as to set, or stabilizes, a permanent pattern in double loop mode.

Abstract: An apparatus for producing a thixotropic metallic melt by simultaneously controlledly cooling and stirring the melt to form solid particles of a first phase suspended in a residual liquid second phase. Vigorous stirring of the metallic melt results in the formation of degenerate dendritic particles having substantially spheroidal shapes. The metallic melt is stirred to rapidly and efficiently circulate the forming semi-solid slurry. Circulation of the forming semi-solid slurry results in a substantially uniform temperature throughout. Through precision stirring and cooling, a semi-solid slurry is formed having a first solid phase of about 70–80 wt. % suspended in a second liquid phase.

Abstract: The present invention relates to a method and apparatus for preparing a metal or metal-alloy product for a casting process—wherein the product is brought into a partly solidified (semi-solidified) state before casting—in which the product contains crystallization nuclei uniformly distributed throughout its volume. The method involves introducing an amount of a chosen alloy (in pulverized form) and an amount of a chosen melt, which is at a temperature above the liquefaction temperature of the alloy, into a crystallization vessel, which is heated to below the liquefaction temperature of the alloy, and mixing the melt and the alloy together in the crystallization vessel by means of electrical and/or magnetic forces to create the desired product.

Abstract: A billet produced by continuous casting having little central segregation, in particular a billet of high carbon steel produced by continuous casting, and a manufacturing method therefor are provided. In the continuous casting billet, the size of the dendritic equiaxed crystal in a billet central portion is reduced to be not more than 6 mm. For this purpose, electromagnetic stirring is performed so that the inclining angle of the primary dendrite within 10 mm of a billet surface layer is increased to be not less than 10°. Furthermore, the mechanical soft reduction is performed during continuous casting so that the diameter of the center porosity in the billet central portion is reduced to be not more than 4 mm. Thereby, in particular in the manufacturing of the continuous casting billet having a carbon content of not less than 0.

Abstract: A method of controlling the flow of molten metal in non-solidified portions of a strand (3) during continuous casting, and a device for application of the method. The device comprises a two-phase or plural-phase stirrer (1) arranged around a mould (6) that is open in opposite ends and that surrounds the strand (3), said stirrer (1) being arranged to generate a moving magnetic field in the melt, and at least one magnetic flow-conducting body (15) being placed between an inner periphery of said stirrer (1) and the outer periphery of the mould (6).

Abstract: An ingot I made of a light alloy is produced using a continuous casting apparatus including a cylindrical water-cooled casting mold which is disposed immediately below a spout having an upward-turned molten metal receiving port and a downward-turned molten metal outlet, and which has an inside radius r1 larger than an inside radius r2 of the molten metal outlet, and lubricating oil discharge passages provided below the spout to supply a lubricating oil to between the water-cooled casting mold 13 and a molten metal m brought into contact with the water-cooled casting mold. In this production, a lubricating oil having a vaporization rate of 30% or more at 300° is used, and an annular gas accumulation for spacing the molten metal apart from outlets of the lubricating oil discharge passages is defined below an annular protrusion of the spout by vaporization of the lubricating oil.

Abstract: During continuous casting of metals, a non-moving, vibrating magnetic field is applied to a molten metal in a casting mold to impose only vibration on the molten metal. This continuous casting method can produce a cast slab much less susceptible to flux entrainment, capture of bubbles and non-metal inclusions near the surface of the molten metal, and surface segregation. The magnetic field is preferably produced by arranging electromagnets in an opposing relation on both sides of the mold to lie side by side in the direction of longitudinal width of the mold, and supplying a single-phase AC current to each coil. The single-phase AC current preferably has frequency of 0.10 to 60 Hz. A static magnetic field can be applied intermittently in the direction of thickness of a cast slab. This technique can produce a cast slab substantially free from the flux entrainment and the surface segregation. Preferably, the static magnetic field is intermittently applied under setting of an on-time t1=0.

Abstract: A method of controlling the flow of molten metal in non-solidified portions of a strand (3) during continuous casting, and a device for application of the method. The device comprises a two-phase or plural-phase stirrer (1) arranged around a mould (6) that is open in opposite ends and that surrounds the strand (3), said stirrer (1) being arranged to generate a moving magnetic field in the melt, and at least one magnetic flow-conducting body (15) being placed between an inner periphery of said stirrer (1) and the outer periphery of the mould (6).

Abstract: A device for continuous or semi-continuous casting of metals, comprising a casting mold (1) which is open in both ends in the casting direction, means (2) for supplying melt to the mold (1), a first electromagnetic induction coil (4) energized by A.C. current and adapted to induce a stirring motion to the melt (7) in the mold (1), and a second electromagnetic induction coil (3) arranged upstream of the first induction coil (4) and adapted to control the stirring motion of the melt in the region adjacent to the upper free surface (5) of the melt. The second induction coil (3) is arranged to be interchangeably energized by either D.C. or A.C. current. The invention also relates to methods for control of stirring motion in a casting mold (1).

Abstract: A billet produced by continuous casting having little central segregation, in particular a billet of high carbon steel produced by continuous casting, and a manufacturing method therefor are provided. In the continuous casting billet, the size of the dendritic equiaxed crystal in a billet central portion is reduced to be not more than 6 mm. For this purpose, electromagnetic stirring is performed so that the inclining angle of the primary dendrite within 10 mm of a billet surface layer is increased to be not less than 10°. Furthermore, the mechanical soft reduction is performed during continuous casting so that the diameter of the center porosity in the billet central portion is reduced to be not more than 4 mm. Thereby, in particular in the manufacturing of the continuous casting billet having a carbon content of not less than 0.

Abstract: The apparatus comprises a submerged entry nozzle (6) having outlets in the main casting plane (P) which differ in their direction of output and fall within two categories (7, 8), said nozzle being associated with two inductors (14, 15) opposite each other on each broad face (22) of the casting mold forming a gap which surrounds the nozzle and producing a traversing magnetic field covering the outlets of at least one category (7), means being provided for adjusting the intensity of the field or for moving it so as to be able to change the distribution between the outlets of the total flow of molten metal.

Abstract: A method and a device for continuous or semi-continuous casting of metal, where hot melt is supplied to a cooled continuous casting mold and the melt is cooled and formed to a at least partly solidified strand as it passes through the mold. An inductive coil is arranged at the top end of the mold to, when supplied with an alternating electric high frequency current, generate a high frequency magnetic field to act upon the melt in the mold, whereby heat is developed in the melt and compressive forces acting to separate the melt from the mold wall are generated. The coil is supplied with the high frequency current from a power supply unit with a current control to supply an alternating electric high frequency current having a base frequency of 50 Hz or more to the inductive coil. The current control has modulation means for modulating and controlling the supplied current is controlled in a pulsed, amplitude modulated manner with an amplitude modulated modulation frequency of 10 Hz.

Abstract: The present invention provides a continuous casting method in which vibration is given to molten metal by a shifting magnetic field so that the equi-axed crystal ratio can be enhanced and the equi-axed crystals can be made fine without generating surface defects caused by powder trapping. Further, the present invention provides an apparatus to which the continuous casting method is applied. Furthermore the present invention provides a cast slab produced by the above method and apparatus.

Abstract: When a continuous casting is carried out while applying an electromagnetic agitating force to a molten metal of an aluminum alloy composition, the molten metal of the aluminum alloy composition has an Fe content in a range of 0.75% by weight ≦Fe<2% by weight. Thus, a hard Fe-based intermetallic compound can be crystallized as a primary crystallized product, and an acicular intermetallic compound can be pulverized and finely divided by cooperation of the hard Fe-based intermetallic compound with the electromagnetic agitating force.

Abstract: The present invention provides a continuous casting method in which vibration is given to molten metal by a shifting magnetic field so that the equi-axed crystal ratio can be enhanced and the equi-axed crystals can be made fine without generating surface defects caused by powder trapping. Further, the present invention provides an apparatus to which the continuous casting method is applied. Furthermore, the present invention provides a cast slab produced by the above method and apparatus.

Abstract: The present invention provides a continuous casting method in which vibration is given to molten metal by a shifting magnetic field so that the equi-axed crystal ratio can be enhanced and the equi-axed crystals can be made fine without generating surface defects caused by powder trapping. Further, the present invention provides an apparatus to which the continuous casting method is applied. Furthermore, the present invention provides a cast slab produced by the above method and apparatus.

Abstract: When a continuous casting is carried out while applying an electromagnetic agitating force to a molten metal of an aluminum alloy composition, the molten metal of the aluminum alloy composition, which is used, has an Fe content in a range of 0.75% by weight ≦Fe<2% by weight. Thus, a hard Fe-based intermetallic compound can be crystallized as a primary crystallized product, and an acicular intermetallic compound can be pulverized and finely divided by cooperation of the hard Fe-based intermetallic compound with the electromagnetic agitating force.

Abstract: A stationary continuous casting mold, especially for casting steel, with an electromagnetic device having a plurality of stirrer elements which are arranged in pairs on the outer wall of the continuous casting mold at a distance from one another and are connected to an electric a.c. voltage. The stirrer elements include at least two pairs and the stirrer elements of each pair are arranged opposite one another and so as to be rotated at an angle relative to one another in an X-shaped configuration in a plane parallel to the casting direction. All pairs are arranged at substantially the same height.

Abstract: Device for the continuous casting of billets, blooms, slabs and round bars, the device being associated with a crystalliser (10) containing the cast metal, the crystalliser (10) having sidewalls (11) which cooperate with cooling channels (16-24) defined by outer walls (15), the device comprising a plurality of devices located outside the sidewalls (11) of the crystalliser, the electromagnetic devices (18a, 18b, 18c) cooperating directly with the sidewalls (11) and being spaced apart longitudinally along the direction of sliding of the cast product, and fed in an independent, separate and differentiated manner from each other, the feeding being a function of the generation of a pulsating electromagnetic field in a direction substantially perpendicular to the axis of the crystalliser (10) and migrating substantially along the whole longitudinal extent of the crystalliser (10), the current pulses achieving a value of up to 100 kA.

Abstract: Crystalliser for the continuous casting of billets, blooms, slabs and round bars, whether the crystalliser be of the plate type or substantially tubular, having cooled sidewalls (11) which include, in at least one longitudinal area, at least one perimeter area with electrical insulation elements (19) defining two electrically insulated ends, the sidewall of the crystalliser (10) included between the aforesaid two insulated ends having an electrical continuity, the ends being associated to electrical feed means (22) governed by a power supply system able to generate electromagnetic waves, defined and desired, interacting at least with the forming skin of the cast metal (12).

Abstract: A continuous-casting mold has walls resting on an oscillating lifting platform and is provided with a stirrer which incorporates a magnetic circuit. The stirrer has a yoke which at least partially surrounds the walls of the mold and which has at least two cores facing opposite sides of the mold. In order to prevent the magnetic force of the stirrer from deforming the walls of the mold, the lifting platform, which sets the walls of the mold into oscillation, is designed as the yoke and each core is located on a bracket projecting out of the lifting platform.

Abstract: Mold for continuously casting rolling slabs or extrusion billets where the mold is in the form of a hollow cylindrical body with a cylindrical mold interior, and an inlet and an outlet opening, and the mold comprises at least two closed, ring-shaped mold elements with a common concentric central axis, the mold axis, where a mold element, the inner sleeve, lies on the inside with respect to the mold axis and defines the sides of the cylindrical mold interior, and the other mold element, the supporting member, lies outside with respect to the central axis of the mold and accommodates the inner sleeve.

Abstract: A method and an apparatus for continuously casting a metal slab made of steel are provided for uniformly circulating molten metal on a meniscus in a mold. The cast metal slab has no surface defect such as a slitting. On the meniscus, the method and apparatus operates to generate electromagnetic stirring thrusts along two long mold sides, these thrusts being opposed to each other. The thrust oriented from a dipping nozzle to the short mold side is made larger than the thrust oriented from the short mold side to the dipping nozzle. A circuit for connecting each coil of a shifting field electromagnetic stirring coil part with a three-phase power supply is symmetric to another circuit with respect to the dipping nozzle. The circuit is divided into two parts along each long mold side. The divided circuit parts are located in parallel but have respective impedances.

Abstract: A downstream connection block (GB) constituted by connector halves (FB1) is electrically connected in permanent manner to a moving assembly (EB). An upstream connection block (GA) is electrically connected in permanent manner to a stationary power supply block (BA) by flexible conductors (CA). A carriage (K) transfers the upstream block (GA) alternately between a front position (PB) providing electrical connection enabling the moving assembly to be powered, and a rear position (PA) remote from the downstream block (GB). The carriage separates from the upstream block when it is to leave said block in said front position. The invention is particularly applicable to electrically powering electromagnetic stirring inductors carried by an oscillating mold in a continuous steel casting installation.

Abstract: An induction stirring method wherein molten metal is electromagnetically stirred during continuous casting in a mold includes control of velocity of the stirring motion at the meniscus and the region adjacent to it, either to decrease or enhance the stirring of the molten metal produced by the main electromagnetic stirrer. An A.C. magnetic stirring modifier is positioned adjacent the region of meniscus to produce electromagnetic stirring of the molten metal at the meniscus, either to oppose the rotary motion of the main electromagnetic stirrer and provide a surface free from the stirring motion or to enhance the rotary stirring motion of the main magnetic stirrer. These two alternative modes of operation permit a casting machine to be used for casting molten metals requiring widely varying operating conditions.

Abstract: Thin cast sheets having an excellent quality are obtained by continuous casting in which a semi-solidified metal slurry is fed from a continuous production device of the semi-solidified metal slurry through a discharge nozzle provided with means for heating the nozzle itself into a twin roll type continuous strip caster, at where the slurry is rapidly quenched and solidified to fine a structure and dispersion of precipitate.

Abstract: An aluminum alloy containing at least one alloying metal selected from the group consisting of bismuth, cadmium, indium and lead in a quantity greater than the maximum solubility of the metal in solid aluminum. More than 80% by weight of the alloying metals are finely dispersed in a solid aluminum matrix in the form of globules or crystals with a size of less than 5 micrometers. The alloy can be obtained by means of mechanical or electromagnetic agitation of the alloy in the course of solidifying, and in the case of continuously casting a liquid alloy, the agitation can be accomplished by means of an alternating magnetic field which is coaxial to the continuous casting axis.

Abstract: A semi-solidified metal composition having an excellent workability is continuously produced by pouring molten metal into an upper part of a cooling agitation mold, agitating it while cooling to produce a slurry of solid-liquid mixed phase containing non-dendritic primary solid particles dispersed therein and discharging out the slurry from a lower part of the cooling agitation mold. In this case, a ratio of shear strain rate at a solid-liquid interface to solidification rate of molten metal is adjusted to a value exceeding 8000 in the cooling agitation mold.

Abstract: To continuously cast thin slabs or round ingots from copper alloys, which slabs or ingots have a thickness of 8 to 40 mm, the present method electromagnetically agitates the melt found inside the ingot mold. By properly dimensioning the agitator coil, the agitation power inside the melt is limited to within a range of about 0.5 to 100 W/cm3, while the pull-off rate of the casting strand is limited to within a range of 0.05 to 1.3 m/min. The copper alloys contain up to a maximum of 1% of one element selected from the group consisting of iron, cobalt, manganese, zinc, zirconium, chromium, molybdenum and niobium.

Abstract: A non-magnetic material having a relatively high electrical resistance, such as austenitic stainless steel, is used for the material of construction of the mold utilized in a conventional continuous casting apparatus, or in a rheocasting apparatus or in a continuous strip casting apparatus.

Abstract: There is provided a device and a method for continuous casting of a homogeneous alloy consisting of immiscible metals. The device includes a crystallizer, fillable with a melt prepared from the metals, a homogenizer, a crystallizer, a feeder for passing a D.C. current through the melt in the crystallizer, in order to produce therein an electric field of predeterminable intensity. There is also provided an electromagnet adapted to produce therein a magnetic field of predeterminable induction, a nozzle adapted to direct jets of a coolant at selected regions of the crystallizer to cause the melt to solidify, and a puller to extract solidified portions of the alloy melt from the crystallizer. The electric field and the magnetic field are applied thereto so as to cross one another, and the interaction between the electric field produced by the D.C.

Abstract: A method for continuous casting of a slab comprises feeding molten steel into a mold through exit ports of an immersion nozzle and controlling a stream of the molten steel by means of an electromagnetic stirrer having a linearly shifting magnetic field. The direction of the linearly shifting magnetic field is toward the immersion nozzle, which is positioned at the center of the mold from a pair of narrow sides of the mold. A first frequency control step controls a frequency of a wave of the shifting magnetic field to be higher than a threshold frequency, wherein the wave has a period equal to the time during which the stream of the molten steel poured from the immersion nozzle passes through an area to which the linearly shifting magnetic field is introduced, said area having an upper limit and a lower limit.

Abstract: An electromagnetic stirring process for continuous casting is presented. According to the present invention, coils of inductors are supplied with a multiphase current so as to create in a molten metal at least one primary rotational movement zone which is offset with respect to a central casting axis. This primary rotational movement zone is also revolved in a secondary gyratory movement around the central casting axis by a cyclic commutation of each phase of the current.

Abstract: To continuously cast thin slabs or round ingots from copper alloys, which slabs or ingots have a diameter of 8 to 40 mm, the present method electromagnetically agitates the melt found inside the ingot mold. By properly dimensioning the agitator coil, the agitation power inside the melt is limited to within a range of about 0.5 to 100 W/cm3, while the pull-off rate of the casting strand is limited to within a range of 0.05 to 1.3 m/min.

Abstract: The invention relates to a continuous casting method for producing thixotropic metallic alloys containing degenerated dendrites. It consists of casting the liquid metal in a movable occluded mould consisting of a hot upstream zone produced from insulating material and a cooled downstream zone in which the metal solidifies, while carrying out by means of a sliding magnetic field, obtained by a series of polyphase inductors, an electromagnetic agitation which causes the dendrites formed in the cold zone to pass into the hot zone where they change to nodules by superficial refusion. This invention is particularly applicable to the production of aluminum plates or bars having thixotropic properties.

Abstract: Twin-roll casting of molten metal to form a continuous cast metal strand is improved by electromagnetic stirring of molten metal immediately upstream of the nip between the rolls to provide a substantially homogenized melt of substantially uniform temperature upstream of the nip.