EP0040072B1 - Apparatus for strip casting - Google Patents

Apparatus for strip casting Download PDF

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Publication number
EP0040072B1
EP0040072B1 EP81302062A EP81302062A EP0040072B1 EP 0040072 B1 EP0040072 B1 EP 0040072B1 EP 81302062 A EP81302062 A EP 81302062A EP 81302062 A EP81302062 A EP 81302062A EP 0040072 B1 EP0040072 B1 EP 0040072B1
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EP
European Patent Office
Prior art keywords
insert
casting
tundish
inch
front edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81302062A
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German (de)
English (en)
French (fr)
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EP0040072A1 (en
Inventor
Robert Edward Maringer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Battelle Development Corp
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Battelle Development Corp
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Filing date
Publication date
Application filed by Battelle Development Corp filed Critical Battelle Development Corp
Publication of EP0040072A1 publication Critical patent/EP0040072A1/en
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Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal

Definitions

  • the present invention relates to apparatus for continuously casting strip material. More particularly, the present invention is directed to apparatus for casting thin metallic strip material.
  • United States Patent No. 4,142,571 is particularly directed to a slot construction in a metal strip casting nozzle having stringent dimensional requirements.
  • United States Patent No. 4,077,462 pertains to the provision of a specific construction for a stationary housing above the peripheral surface of a chill roll used for strip casting.
  • melt spinning processes of producing metallic filament by cooling a fine molten stream either in free flight or against a chill block have been practiced.
  • melt extraction techniques such as crucible melt extraction disclosed in United States Patent No. 3,838,185 and pendant drop melt extraction techniques taught in United States Patent No. 3,896,203. It has been found difficult to produce uniform sheet or strip by such alternative techniques of rapid casting. There are many factors, such as auxiliary surface cooling, surface coatings and the like which appear to affect product thickness and quality of rapidly cast strip material.
  • strip casting is not a widely accepted and commercially significant operation at the present time. It appears that various improvements, modifications, and innovations are required in the art to effect a significant commercial impact in the art of strip casting.
  • proper relationships among such variables as molten metal tundish construction, nozzle orifice size and dimensions, spacing from a casting surface, speed at which such surface is moved, quench rates, metal temperature and feed rates, and the like may require more accurate identification in order to accomplish the uniformity and consistency required for successful, commercial production of cast strip.
  • certain nozzle and slot structures and their dimensional relationship to the casting surface onto which strip material is cast have been found to be desirable to yield uniform strip casting results.
  • a strip casting apparatus which is capable of continuously casting metal strip material of substantially uniform dimension and substantially uniform quality throughout its length.
  • Another object of the present invention is the provision of a strip casting apparatus having a nozzle construction which promotes rapid casting of metals with a minimum of metal turbulence during casting.
  • Another object of the present invention is to provide a strip casting apparatus capable of reproducing successful strip casting operations.
  • Another object of this invention is to provide a strip casting apparatus which can effect sufficiently rapid quenching of the produced strip to result in the production of amorphous strip.
  • the production of continuously cast crystalline material is also comprehended by the present invention.
  • A'further object of this invention is to identify certain design and dimensional requirements, particularly with regard to nozzle structure, which permits continuous and repititious rapid casting of metallic strip material of uniform dimension and uniform quality.
  • Another object of the present invention is to utilize at least one, separate insert to form a part of the nozzle.
  • Such insert may be moved, aligned or changed without substantially affecting the remainder of the apparatus.
  • Such insert may be generally unobstructed which facilitates the physical adjustment thereof, permits direct heating thereof and allows virtually unrestricted visual observation of the casting operation.
  • United States Patent no. 4,142,571 already referred to disclosed apparatus for continuously casting strip material comprising a tundish for receiving and holding molten metal having a nozzle therein through which molten metal is delivered to a casting surface movable past the nozzle at a certain speed, said nozzle comprising an orifice passage having substantially uniform cross-sectional dimensions throughout the longitudinal extent thereof, defined between a first inside surface and a second inside surface.
  • such apparatus in which the casting surface is movable past the nozzle at a speed of from 61 to 3048 linear surface metres per minute (200 to 10,000 linear surface feet per minute), is characterised in that an insert movable relative to the tundish is disposed therein or thereon, said insert forms at least a portion of one of said inside surfaces, and a minimum gap of at least 0.254 mm (.010 inch) is maintained between said inside surfaces, and said insert has a front edge surface capable of being disposed to within 3.048 mm (0.120 inch) of the casting surface.
  • Figure 1 generally illustrates apparatus in accordance with the present invention for casting metallic strip material 10.
  • This apparatus includes an element 12 upon which the strip 10 is cast.
  • a continuous strip 10 is cast onto a smooth, outer peripheral surface 14 of a circular drum or wheel as shown in Figure 1.
  • a wheel with a smooth, frustoconical outer peripheral surface may be employed.
  • a belt capable of rotating through a generally ovular path may also be employed as the casting element.
  • the cooled casting surface should be at least as wide as the strip to be cast.
  • the casting element 12 comprises a water cooled, precipitation hardened copper alloy wheel containing about 90% copper.
  • Copper and copper alloys are chosen for their high thermal conductivity and wear resistance.
  • steel, brass, aluminum, alloys or other materials may be utilized alone or in combination, or multipiece wheels having sleeves of molybdenum or other material may also be employed.
  • cooling may be accomplished with the use of a medium other than water. Water is chosen for its low cost and its ready availability.
  • the surface 14 of the casting wheel element 12 must be able to absorb heat generated by contact with molten metal at the initial casting point 16, and such heat must diffuse substantially into the copper wheel during each rotation of the wheel.
  • Heat diffusion, cooling may be accomplished by delivering a sufficient quantity of water through internal passageways located near the periphery of the casting wheel 12.
  • the cooling medium may be delivered to the underside of the casting surface. Understandably, refrigeration techniques and the like may be employed to accelerate or decelerate cooling rates, and/or to effect wheel expansion or contraction during strip casting.
  • the casting surface should be generally smooth and symmetrical to maximize uniformity in strip casting.
  • the distance between the outer peripheral casting surface 14 and the surfaces defining the orifice of the nozzle which is feeding the molten material onto the casting surface should not substantially deviate from a desired or set distance. This distance shall hereinafter be called standoff distance or gap. It is understandable that the gap must be substantially maintained throughout the casting operation when it is the intention of the operator to cast uniform strip material.
  • the casting element is a drum or wheel
  • the element should be carefully constructed so as not to be out-of-round during operation to ensure uniformity in strip casting.
  • a drum or wheel which is out-of-round by about 0.508 mm (0.020 inch), or more may have a magnitude of dimensional instability which, unless corrected or compensated during operation, may be unacceptable for certain strip casting operations.
  • acceptable dimensional symmetry, as well as elimination of problems associated with weld porosity may be more readily accomplished by fabricating a wheel or drum from a single, integral slab of cold rolled or forged copper.
  • alternative materials may be employed.
  • the molten material 20 to be cast in the apparatus described herein is preferably retained in a crucible or tundish 22, which is provided with a pouring orifice or nozzle 24.
  • the nozzle 24 is typically, though not necessarily, located at a lower portion of the tundish 22 as shown in Figure 1.
  • the tundish 22 is constructed for receiving and holding molten metal therein. It will be appreciated that appropriate materials must be utilized for the tundish 22 to withstand the molten metal conditions, and where the tundish 22 is not a monolithic structure, the joints and seams between separate pieces of the tundish must be assembled to prevent molten metal leakage during sustained operation.
  • the tundish 22 has a front wall 26 and a rear wall 28 (Fig. 2), with respect to the casting direction, which casting direction is indicated by an arrow adjacent the casting surface 14 in Figure 2.
  • the front wall 26 has an inside surface 30 and an outside surface 32 with respect to the molten metal holding portion of the tundish 22.
  • the rear wall 28 has an inside surface 34 and an outside surface 36 with respect to the molten metal holding portion of the tundish 22.
  • the inside surfaces 30 and 34 extend toward the nozzle area of the tundish 22. It should be understood that the molten metal holding portion of the tundish 22, which is formed between the inside surfaces 30 and 34, may take a variety of forms or shapes.
  • the upper portion of the tundish 22 have a significantly larger cross-sectional volume than that of the nozzle area of the tundish 22 in order that the molten metal head height, above the nozzle, is substantially unaffected by minor variations in molten metal volumes in the tundish 22.
  • Such structure contributes to the maintenance of a substantially constant metallostatic head pressure at the nozzle, even with minor variations in metal volume in the tundish 22.
  • inside surfaces 30 and 34 converge toward one another in the direction of the nozzle, and that such surfaces 30 and 34 be radiused, rounded or generally curvilinear at locations of turns or bends in the tundish 22 to minimize metal turbulence therein during the casting operation.
  • molten metal holding area formed between the inside surfaces 30 and 34, should be enclosed with sidewalls 38 and 40, as indicated in Figure 3. It is noted that no fixed width dimension is shown in Figure 3. It has been found that a tundish and nozzle forming part of apparatus of the present invention may be constructed by first cutting or carving refractory boards, such as insulating boards made from fiberized kaolin, into the desired tundish shape, such as that shown in Figure 3. Any number of these boards 42 may be stacked upon one another to obtain the desired tundish and nozzle width. There is not expected to be a restriction on the maximum width of the tundish and nozzle of the present invention, and widths in excess of 915 mm (thirty six inches) are comprehended by the present invention.
  • refractory boards such as insulating boards made from fiberized kaolin
  • the inside surfaces 30 and 34 formed by the stack may be sanded or otherwise finished to provide generally smooth inside surfaces 30 and 34 across the width of the stacked elements forming the tundish 22. It should also be understood that single piece materials may be used to construct the tundish in which case stacking would not be necessary.
  • the stack may be disposed between uncarved boards 44, which may serve as the sidewalls 38 and 40 for the tundish 22.
  • the tundish 22 of the present invention may be assembled with refractory cements, or the like, or may be constructed as a monolithic structure which does not require assembly.
  • a nozzle 24 is located in the tundish 22, preferably in a lower portion thereof.
  • the nozzle 24 comprises an orifice passage 80 defined between the first inside surface 34 of the rear wall 28 of the tundish 22 and the second inside surface 48 of an insert 50.
  • a portion of the inside surface 48 of the insert 50 ( Figure 2) is disposed against a portion of a ridge 52 formed by the outside surface 32 of the front wall 26 of the tundish 22.
  • the insert 50 extends across the full length of the orifice passage, or slot 80 such that the end portions of the inside surface 48 of the insert 50 are disposed against ridges on the sidewalls 38 and 40 of the tundish 22. Such disposition may be necessary to maintain the stability of the insert 50.
  • a portion of the inside surface 48 of the insert 50 extends beyond the front wall 26 of the tundish 22 in the direction of the casting surface 14. It should be appreciated that the extent of the insert 50 may be flush with the extent of the front wall 32 of the tundish as measured in a direction toward the casting surface.
  • the extent of the insert, as indicated by numeral 70 in Figure 2 is maintained at a distance of at least 0.254 mm (0.010 inch) from the inside surface 34 of the rear wall 28, at the orifice passage 80.
  • the insert 50 is reciprocal on the ridge 52 of the tundish 22 in a direction toward and away from the casting surface 14.
  • Such reciprocal disposition of the insert 50 may be obtained by manual adjustment, but preferably the insert 50 should be automatically adjustable and continuously measurable to ensure that desired spacings, gaps and the like are maintained during casting.
  • the insert 50 is reciprocal in a generally horizontal plane.
  • the insert 50 may be reciprocal along an angular path, as shown in Figures 4 and 6, along an arcuate path as shown in Figure 5, or in a generally vertical plane as shown in Figure 7.
  • the insert 50 may be disposed on an element 55 which element 55 may be adjusted to any number of positions by rotation thereof about a pivot point 58 to obtain the desired disposition of the insert 50.
  • the insert 50 may be reciprocal toward and away from the casting surface 14, the insert 50 must not be permitted to lift from its fixed position against the ridge 52 of the tundish 22. This fixed position is necessary to counteract the pressure which the molten metal may exhibit against the inside surface 48 of the insert 50.
  • a weight may be placed on a top surface 56 of the insert 50.
  • a pressure exerting device such as a spring biased device, a hydraulic cylinder arrangement, a clamp or the like, may be used to urge the insert against the ridge 52 of the tundish 22.
  • the insert 50 may be held in a slot which provides such required fixed support for the insert 50. Note that even with the arrangement illustrated in Figure 8, the insert 50 is still reciprocal toward and away from the casting surface.
  • the insert 50 may be able to be canted such that one end portion 60 of the insert 50 may be moved toward the respective end portion of the casting surface 14 while the other end portion 62 is moved away from the other respective end portion of the casting surface 14, as shown in Figure 13.
  • An insert structure which may be utilized to facilitate such canting includes an arcuate rear surface 64 for the insert 50, a portion of which abuts a rearward wall 66 of the tundish 22 at a pivot point 68. By rolling the rear surface 64 of the insert 50, minor canting alignments can be effected.
  • canting variations may be helpful to assure that uniform gauge strip material is produced, especially during prolonged casting operations. Such canting variations may also assist in removing entrapped material from the nozzle during casting, or for intentionally casting strip material having a varying gauge across the width of the strip material.
  • the insert 50 of the present invention may be easily replaced, although it is preferred that the insert 50 and the tundish 22 be reused either together or separately. It should also be noted that damage to an insert 50 will not render the entire tundish 22 unserviceable. In the event of such insert damage, the insert 50 is merely replaced and the process continues.
  • the insert 50 is provided with a front edge surface 70.
  • the front edge surface 70 faces the casting surface 14 and is disposed to within less than 3.048 mm (0,120 inch) of the casting surface 14.
  • the front edge surface 70 is disposed to within 2.032 mm (0.080 inch) and in a more preferred embodiment, to within 0.508 mm (0.020 inch) of the casting surface 14. It is also preferred that in such embodiment the front edge surface 70 be in substantially complete parallelism with the casting surface 14.
  • Such complete parallelism may be accomplished by placing a sheet of sandpaper, or the like, against the casting surface 14 with the grit side of the sandpaper facing the insert 50.
  • the front edge surface 70 is ground by the grit side of the sandpaper into substantially complete parallelism with the casting surface 14.
  • Such substantially complete parallelism may be achieved even when round or other curvilinear casting surfaces are employed. To achieve such parallelism by this procedure 400 to 600 grit sandpaper has been found to be adequate.
  • the outside surface 36 of the rear wall 28 disposed adjacent the casting surface 14 may be brought into substantially complete parallelism therewith by this same procedure.
  • the standoff distance, or gap h between the front edge surface 70 and the casting surface 14 is maintained throughout the length thereof. It has been found that the gap h between the front edge surface 70 and the casting surface 14 must be maintained at less than 3.048 mm (0.120 inch) in order to successfully cast strip material. Preferably, this gap is maintained at less than 2.032 mm (0.080 inch) and for casting certain alloys into thin gauge strip, gaps less than 0.508 mm (0.020 inch) are preferred.
  • the front edge surface 70 of the insert 50 may comprise a line extending across the tundish, at a 90° junction, or corner, of the front edge of the insert 50, as opposed to a defined surface length b as discussed above. To this extent the length b of the front edge surface 70 could be zero. Even if surface 70 approaches a line across the tundish, such surface must be disposed within 3.048 mm (0.120 inch) of the casting surface 14 to successfully cast strip material.
  • the gap e between the outside surface 36 of the rear wall 28 and the casting surface 14, as best shown in Figure 14, does not appear to be as critical.
  • the surface 36 be disposed as close as possible to the casting surface 14, without causing any interference for the movable casting surface therebelow.
  • the outside surface 36 of the rear wall 28 at the orifice passage 80 of the nozzle may just clear the casting surface 14, i.e., perhaps within about 0.0508 mm (.002 inch), as shown in the drawing. Such spacing must not be large enough to allow significant molten metal backflow therebetween during casting.
  • the outside surface 36 may be tapered from the orifice of the nozzle in a direction away from the casting surface 14.
  • the crucible 22 is preferably constructed of a material having superior insulating ability. If the insulating ability is not sufficient to retain the molten material at a relatively constant temperature, auxiliary heaters such as induction coils may have to be provided in and/or around the crucible 22, or resistance elements such as wires may be provided.
  • a convenient material for the crucible is an insulating board made from fiberized kaolin, a naturally occurring, high purity, alumina-silica fire clay. Such insulating material is available under the trade name Kaowool HS board.
  • various other materials may have to be employed for constructing the crucible or the insert including graphite, quartz, clay graphite, boron nitride, silicon nitride, boron carbide, silicon carbide, alumina, zirconia, and various combinations or mixtures of such materials.
  • the insert 50 is preferably constructed of boron nitride, silicon nitride, silicon carbide, boron carbide, zirconia or quartz.
  • the orifice passage 80 of the nozzle 24 remain open and its configuration remain substantially stable throughout a strip casting operation. It is understandable that the orifice passage 80 should not erode or clog, significantly during a strip casting sequence or certain objectives such as maintaining uniformity in the casting operation and of minimizing metal flow turbulence in the tundish 22 may be defeated. Along these lines, it appears that certain insulating materials may not be able to maintain their dimensional stability over long casting periods. To obviate this problem the nozzle 24, especially that portion defined by the insert 50, may be constructed of a material which is better able to maintain dimensional stability and integrity during exposure to high molten metal temperatures for prolonged time periods.
  • the drive system and housing for the drum, wheel or other casting surface 14 of the present invention should be rigidly constructed to permit drum rotation without structrual instability which could cause the drum to slip or vibrate. In particular, care should be taken to avoid resonant frequencies at the operating speeds for the drum.
  • the casting surface should be capable of moving at a surface speed of from 61 linear surface metres per minute (200 linear surface feet per minute) to 3048 linear surface metres per minute (10,000 linear surface feet per minute). When utilizing a drum having a circumference of about 2.4 metres (8 feet), this rate calculates to a drum speed of from about 25 rpm to about 1250 rpm.
  • a three horsepower variable speed reversible, dynamically braked motor provides an adequate drive system for an integral copper casting drum 50.8 to 254 mm (2 to 10 inches) thick and about 2.4 metres (8 feet) in circumference. Power requirements may have to be modified depending upon the type and size of casting surface 14 employed. It should be appreciated that the casting surface 14 can be moved in a direction opposite to that illustrated in the drawing, and that the tundish 22 may be disposed at any location about the casting wheel illustrated in the drawing.
  • the casting surface 14 on the wheel or drum of the apparatus of the present invention is smooth. It has been found that in certain applications for producing amorphous materials, finishing the peripheral surface 14 of a casting drum 12 with 400-grit sandpaper and preferably with 600-grit sandpaper may yield improved product uniformity. It is anticipated that an etched surface may yield the best, smooth surface, product uniformity.
  • FIG. 14 A preferred structure for the nozzle 24 of the apparatus of the present invention is shown in enlarged cross-section in Figure 14. In one embodiment of this apparatus, the dimensions indicated in Figure 14 have the following preferred limitations.
  • Dimension c representing the width of the rear wall at the orifice of the nozzle 24 and d representing the width of the insert 50, appear to be arbitrary and do not appear to be significantly critical to the strip casting operation. In fact, it should be appreciated that dimension c could approach zero if the inside surface 34 of the rear wall could be tapered completely through the orifice passage 80.
  • Molten metal turbulence during strip casting should be minimized, and perhaps avoided by relieving sharp corners of the nozzle in the direction of casting. It will be understood that such rounding may be accomplished by constructing the tundish walls of an eroding material, such as Kaowool HS board, which may provide natural erosion as a result of the strip casting operation. Turbulence may also be minimized by rounding other corners such as corner 72 on the insert 50 and corner 74 on the rear wall 28 at the nozzle as shown in Figure 14.
  • molten metal is delivered to a heated crucible 22.
  • a heater such as induction coils or resistance wire
  • a heater may be provided in and above the crucible 22 to maintain relatively constant molten metal temperatures as may be desired.
  • heating devices may be employed on or near the insert 50 because of the general accessibility of the insert 50 in the apparatus of the present invention.
  • resistance wires, or heating coils may be provided in a bottom portion of a pressure exerting device located on or near the insert 50.
  • a torch may have its flame directed against the insert 50 during casting.
  • metal may be poured directly into a preheated crucible.
  • Such metal preheat temperature and the heating of the tundish 22 and insert 50 should prevent freezing or clogging of the orifice passage or slot 80 during the initial casting operation, and the temperature of the flowing metal should thereafter keep the crucible 22 and the insert 50 at sufficient temperature to ensure uninterrupted molten metal flow through the orifice passage 80.
  • the nozzle should be externally heated throughout the casting operation.
  • the metal which is fed to the crucible 22 may be superheated to allow a certain degree of temperature loss without adversely affecting metal flow.
  • metallostatic head height in the tundish 22 should be maintained at a relatively constant level throughout the casting operation to assure that a relatively constant static head pressure may be maintained at the orifice of the nozzle 24. This may be accomplished by initially pouring the molten metal into the crucible to the desired height and thereafter controlling the rate at which additional molten metal is poured into the crucible to maintain the metallostatic head. It is understandable that the rate at which additional molten metal is fed to the crucible 22 should be in substantial conformity with the rate at which metal flows from the nozzle orifice onto the casting surface 14 in forming strip material.
  • the tundish 22 and the insert 50 are independently or dependently movable toward and away from the casting surface 14. As shown sequentially in Figures 9, 10 and 11.
  • the tundish 22 and the insert 50 thereon, are in a position away from the casting surface 14.
  • the casting surface 14 is being moved past the nozzle 24 at a rate of from 61 to 3048 linear metres per minute (200 to 10,000 linear feet per minute).
  • the tundish 22 Prior to or simultaneously with the pouring of molten metal into the tundish, the tundish 22 is moved toward the casting surface 14, such that the outside surface 36 of the rear wall 28 at the nozzle 24 is located to within 0.508 mm (0.020 inch), and preferably to within 0.254 mm (0.010 inch), of the casting surface 14 as shown in Figure 10.
  • the outside surface 36 is moved as close as possible to the casting surface 14 without interfering with the motion of the casting surface 14 therebelow.
  • the insert 50 is not moved from its position relative to the tundish 22, as the tundish 22 is moved toward the casting surface 14.
  • the position of the insert 50 should be adjusted such that the front edge surface 70 is within 3.048 mm (0.120 inch) and more preferably to about 0.254 to 0.508 mm (0.010 to .020 inch) of the casting surface 14 as shown in Figure 11.
  • the tundish 22 and insert 50 should be in final adjusted position soon after casting begins. It will be appreciated that the extent of the gaps h and/or e may be adjusted during casting by the apparatus of the present invention, which provides significant flexibility in the casting operation.
  • the position of the insert 50 on the tundish 22 may be established, set and maintained before the entire assembly, i.e., tundish 22 including the insert 50, is moved toward its casting position. With such arrangement the disposition of the insert 50 is properly attained as the disposition of the outside surface 36 of the rear wall 28 is attained. In such embodiment the insert 50 may be fixedly mounted in proper relative position on the tundish 22.
  • doctor blade has been found particularly useful in the production of thinner amorphous strip materials which appear to have a greater tendency to adhere to the casting surface 14 than do the crystalline strip materials. It is believed that the force which retains the strip on the casting surface reflects the quality of the thermal contact between the strip and the casting surface.
  • Alternative arrangements, such as an air knife, may also be employed to separate the strip from the wheel.
  • the casting of relatively high quality strip material including amorphous material which for the purpose of this invention includes materials which are at least 25% amorphous, is feasible and practical using the apparatus and procedures described above. Understandably, the quench rates must be higher for amorphous material as compared to crystalline material. Quench rates may be accelerated such as by increasing the speed of the casting surface, or the like. It is important to recognize that the process operates in two effective modes. With the orifice quite close to the drum surface, strip perhaps 0.0254 to 0.0762 mm (0.001 to 0.003 inch) thick can be cast of either amorphous or crystalline materials.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
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EP81302062A 1980-05-09 1981-05-08 Apparatus for strip casting Expired EP0040072B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14844080A 1980-05-09 1980-05-09
US148440 1993-11-08

Publications (2)

Publication Number Publication Date
EP0040072A1 EP0040072A1 (en) 1981-11-18
EP0040072B1 true EP0040072B1 (en) 1984-05-30

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EP (1) EP0040072B1 (ru)
JP (1) JPS574360A (ru)
KR (1) KR850001152B1 (ru)
AR (1) AR240267A1 (ru)
AU (1) AU542806B2 (ru)
BG (1) BG45215A3 (ru)
BR (1) BR8102823A (ru)
CA (1) CA1180875A (ru)
DE (1) DE3163845D1 (ru)
ES (1) ES502051A0 (ru)
HU (1) HU183415B (ru)
MX (1) MX155277A (ru)
NO (1) NO160288C (ru)
PL (1) PL137085B1 (ru)
RO (1) RO83017B (ru)
SU (1) SU1165225A3 (ru)
YU (1) YU43229B (ru)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049557A1 (en) * 1980-10-06 1982-04-14 Allegheny Ludlum Steel Corporation Apparatus for strip casting having a heated orifice
EP0049556A1 (en) * 1980-10-06 1982-04-14 Allegheny Ludlum Steel Corporation Strip casting apparatus with heated orifice
EP0049937A1 (en) * 1980-10-03 1982-04-21 Allegheny Ludlum Steel Corporation Apparatus and method for strip casting
EP0121298A1 (en) * 1983-02-03 1984-10-10 Mb Group Plc Continuous extrusion of metals
US4488590A (en) * 1980-10-06 1984-12-18 Allegheny Ludlum Steel Corporation Apparatus for strip casting having a heated orifice
EP0137238A1 (en) * 1983-08-26 1985-04-17 Norsk Hydro A/S Casting system
EP0147912A1 (en) * 1983-12-14 1985-07-10 Ribbon Technology Corporation Melt overflow system for producing filamentary or fiber products directly from molten materials
US4561488A (en) * 1982-02-19 1985-12-31 Hitachi, Ltd. Method of and apparatus for continuously casting metal strip
WO1987001631A1 (en) * 1985-09-20 1987-03-26 Battelle Development Corporation Process for continuous belt casting of strip
US4715428A (en) * 1984-09-13 1987-12-29 Allegheny Ludlum Corporation Method and apparatus for direct casting of crystalline strip by radiant cooling
DE3802202A1 (de) * 1988-01-26 1989-08-03 Voest Alpine Ag Verfahren zum stranggiessen eines duennen bandes oder einer duennen bramme sowie vorrichtung zur durchfuehrung des verfahrens
WO1998035773A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
WO1998035772A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3423834A1 (de) * 1984-06-28 1986-01-09 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zum kontinuierlichen giessen von metallschmelze, insbesondere von stahlschmelze
AU578968B2 (en) * 1984-09-13 1988-11-10 Allegheny Ludlum Steel Corp. Method and apparatus for direct casting of crystalline strip by radiantly cooling
DE3731781C2 (de) * 1987-09-22 1996-07-11 Vacuumschmelze Gmbh Vorrichtung zum Herstellen eines bandförmigen Metallstranges
JP3602120B2 (ja) 2002-08-08 2004-12-15 株式会社Ｎｅｏｍａｘ ナノコンポジット磁石用急冷合金の製造方法
CN1805071A (zh) * 2002-08-08 2006-07-19 株式会社新王磁材 磁体用急冷合金的制造方法
KR101493344B1 (ko) * 2008-12-22 2015-02-16 재단법인 포항산업과학연구원 직접 주조용 노즐
CN102861885B (zh) * 2012-09-27 2014-07-02 张家港市清大星源微晶有限公司 非晶制带机中的喷嘴调整装置
KR102070271B1 (ko) * 2015-11-30 2020-01-28 닛폰세이테츠 가부시키가이샤 금속 박대의 제조 장치 및 그것을 이용한 금속 박대의 제조 방법

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US4142571A (en) * 1976-10-22 1979-03-06 Allied Chemical Corporation Continuous casting method for metallic strips
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0049937A1 (en) * 1980-10-03 1982-04-21 Allegheny Ludlum Steel Corporation Apparatus and method for strip casting
EP0049556A1 (en) * 1980-10-06 1982-04-14 Allegheny Ludlum Steel Corporation Strip casting apparatus with heated orifice
US4488590A (en) * 1980-10-06 1984-12-18 Allegheny Ludlum Steel Corporation Apparatus for strip casting having a heated orifice
EP0049557A1 (en) * 1980-10-06 1982-04-14 Allegheny Ludlum Steel Corporation Apparatus for strip casting having a heated orifice
US4561488A (en) * 1982-02-19 1985-12-31 Hitachi, Ltd. Method of and apparatus for continuously casting metal strip
EP0121298A1 (en) * 1983-02-03 1984-10-10 Mb Group Plc Continuous extrusion of metals
EP0137238A1 (en) * 1983-08-26 1985-04-17 Norsk Hydro A/S Casting system
EP0147912A1 (en) * 1983-12-14 1985-07-10 Ribbon Technology Corporation Melt overflow system for producing filamentary or fiber products directly from molten materials
US4715428A (en) * 1984-09-13 1987-12-29 Allegheny Ludlum Corporation Method and apparatus for direct casting of crystalline strip by radiant cooling
WO1987001631A1 (en) * 1985-09-20 1987-03-26 Battelle Development Corporation Process for continuous belt casting of strip
DE3802202A1 (de) * 1988-01-26 1989-08-03 Voest Alpine Ag Verfahren zum stranggiessen eines duennen bandes oder einer duennen bramme sowie vorrichtung zur durchfuehrung des verfahrens
US4960164A (en) * 1988-01-26 1990-10-02 Voest-Alpine Industrieanlagenbau Gesellschaft M.B.H. Method of continuously casting a thin strip
US5035279A (en) * 1988-01-26 1991-07-30 Voest-Alpine Industrieanlagenbau Gesellschaft M.B.H Arrangement for continuously casting a continuous metal sheet
WO1998035773A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
WO1998035772A1 (de) * 1997-02-14 1998-08-20 Voest-Alpine Industrieanlagenbau Gmbh Verfahren zum verhindern des kontaktes von sauerstoff mit einer metallschmelze
US6415849B1 (en) 1997-02-14 2002-07-09 Voest-Alpine Industrieanlagenbau Gmbh How to avoid contact between oxygen and molten metal
US6443220B1 (en) 1997-02-14 2002-09-03 Voest-Alpine Industrieanlagenbau Gmbh Method of preventing contact of oxygen with a metal melt

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Publication number Publication date
DE3163845D1 (en) 1984-07-05
SU1165225A3 (ru) 1985-06-30
NO811577L (no) 1981-11-10
ES8303953A1 (es) 1983-03-01
RO83017B (ro) 1984-01-30
MX155277A (es) 1988-02-12
RO83017A (ro) 1984-01-14
CA1180875A (en) 1985-01-15
ES502051A0 (es) 1983-03-01
BR8102823A (pt) 1982-02-02
YU43229B (en) 1989-06-30
EP0040072A1 (en) 1981-11-18
AU542806B2 (en) 1985-03-14
NO160288C (no) 1989-04-05
YU96381A (en) 1987-12-31
AU6998181A (en) 1981-11-12
AR240267A1 (es) 1990-03-30
PL231047A1 (ru) 1982-02-01
NO160288B (no) 1988-12-27
JPH0413055B2 (ru) 1992-03-06
KR830005944A (ko) 1983-09-14
BG45215A3 (bg) 1989-04-14
KR850001152B1 (ko) 1985-08-16
JPS574360A (en) 1982-01-09
PL137085B1 (en) 1986-04-30
HU183415B (en) 1984-05-28

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