EP0233147B1 - Procédé et dispositif de coulée continue entre rouleaux - Google Patents

Procédé et dispositif de coulée continue entre rouleaux Download PDF

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Publication number
EP0233147B1
EP0233147B1 EP87810055A EP87810055A EP0233147B1 EP 0233147 B1 EP0233147 B1 EP 0233147B1 EP 87810055 A EP87810055 A EP 87810055A EP 87810055 A EP87810055 A EP 87810055A EP 0233147 B1 EP0233147 B1 EP 0233147B1
Authority
EP
European Patent Office
Prior art keywords
strip
roll
rolls
nozzle
gap
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
EP87810055A
Other languages
German (de)
English (en)
Other versions
EP0233147A1 (fr
Inventor
Wilhelm Friedrich Lauener
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.)
Larex AG
Original Assignee
Larex AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Larex AG filed Critical Larex AG
Priority to AT87810055T priority Critical patent/ATE39333T1/de
Publication of EP0233147A1 publication Critical patent/EP0233147A1/fr
Application granted granted Critical
Publication of EP0233147B1 publication Critical patent/EP0233147B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel

Definitions

  • the present invention relates to a roll casting method according to the preamble of claim 1 and a roll casting system for performing the method.
  • the strip thickness produced in systems previously carried out is between 3 and 15 mm, mostly 6 to 8 mm.
  • the bandwidth in newer production plants measures between 0.25 and 2 m. With the appropriate dimensioning of the casting rolls, their storage and the drive, however, the bandwidth to be produced has no limits in terms of casting technology, so that bandwidths of 3 to 4 or more meters can also be realized.
  • the casting process was previously mainly used for the production of aluminum strips. whereby an hourly production of 900 to 1200 kg / m strip width is achieved, depending on the strip thickness produced and the alloy processed.
  • the strip produced thereby leaves the casting nip formed by the two rollers at a speed, generally referred to as the casting speed, of 0.75 to 1.4 m / min.
  • the temperature of the cast strip is usually between 350 ° and 400 ° C.
  • the casting direction can be arbitrary. Plants are known with which casting is carried out vertically upwards, horizontally or obliquely upwards or downwards.
  • the rollers are equipped with a cooling system. so that the absorbed heat is dissipated by a coolant. So far, the internal roller cooling has prevailed in that the rollers have channels through which the coolant flows within an attached roller shell. However, external systems can also be used by directly contacting the roller surface with the coolant (Sir Henry Bessemer, 1846).
  • the strip remains at the higher adhesive force having roller stick and must be released from this with force, which is usually done by provided belt wipers or correspondingly high belt tension. This severely impairs the quality of the tape, making it unusable for most uses in today's quality requirements.
  • a volatile liquid such as suspended graphite. Molybdenum disulfide, boron nitride, magnesium oxide etc., which act as a release agent, can to a certain extent counteract the risk of sticking.
  • the object of the invention is to provide a roll casting process and a roll casting installation for carrying out the process which produces a high stability of the strip at the outlet of the rolls, so that the strip can be released from the rolls even with large different adhesive forces and can be removed freely thus a much greater contact length between the cast material and the rolls, thus enabling a significant increase in the performance of the casting system.
  • as intensive secondary cooling of the strip as possible should be achieved at the outlet from the rolls in order to make it more difficult for the melt to break through.
  • the achievement of the object according to the invention is described in the characterizing part of claim 1.
  • Another advantageous procedure is characterized by claim 2.
  • the cooling medium is expediently fed through nozzles arranged on both sides of the belt, the one nozzle wall in each case advantageously being formed directly by the roller surface.
  • the application of the method according to the invention can be combined with an additional external roller cooling.
  • the cooling zone consists in that the roller surface is wetted, sprayed or blown over a part of the circumference with a cooling medium.
  • the roll surface is cooled directly at the exit from the casting zone by means of the used cooling medium e g.
  • a drying zone adjoining the cooling zone ensures that the roller surface runs dry into the casting zone.
  • Drying can be carried out in a known manner by wiping and / or brushing, optionally supported by blowing in cold or warm air, in order to accelerate the residual evaporation of a liquid cooling medium on the roller surface heated by the casting process.
  • the plant shown in FIGS. 1 and 2 has casting rolls 1 and 2 which can be driven in opposite directions in the direction of the arrows in FIGS. 1 and 3.
  • a pouring nozzle of which lateral boundary walls 4 are designated in FIGS.
  • liquid metal 5 is supplied, which is laterally distributed below the nozzle 4 and cooled on the roller surfaces.
  • the metal then solidifies on the solidification path b and is then rolled on the rolling path a, as described above.
  • the rolled strip 6 exits down through the roll gap 3 and is discharged in a manner which is not shown and is known per se. So far, the system corresponds to the known systems described above.
  • a coolant nozzle 7a or 7b is now arranged below the gap 3 on both sides of the belt 6.
  • Each of these nozzles has a nozzle body, formed by an inner side wall 8 and an outer side wall 9, two opposite end walls 10, which close off the nozzle body at the ends, and a rear wall 11.
  • Inlet nozzles 12 are provided on the rear wall. through which coolant, preferably water, can be supplied through supply lines, not shown, in a certain amount and at a certain pressure.
  • the two nozzles Bodies are covered at the top by rollers 1 and 2 each forming a boundary wall of the nozzle.
  • sealing rods 14 and 15 e . are laid. As FIG. 1 shows, these sealing rods lie in grooves 13 with play on all sides, so that the rods are pressed into operation in the sealing position shown in FIG. 1 by the pressure of the cooling water.
  • the sealing bars 14 are straight, and since the friction of the rougher roll surface on these bars is normally greater than the friction of the bars on a machined groove wall, the sealing bars 14 are rotated during operation, resulting in less wear than if they would slide on the roller surface.
  • the sealing rods 15, of course, must of course slide on the roller surfaces.
  • the sealing rods 14 and 15 are made of metal or plastic.
  • the axially extending grooves 13 in the outer side walls 9 open into the circumferentially extending grooves 13 in the end walls 10.
  • the grooves 13 provided in the end walls are closed on both sides by a cover 16 each.
  • a roller surface and a beveled top section 17 of each inner side wall 8 delimit a nozzle with a slot-shaped nozzle opening 18 that extends axially along a surface line of each roller.
  • a coolant flow can be either tangential or circumferential along the roller surfaces upwards into the between the spaces 19a and 19b formed in the nozzles, the rollers, the gap 3 and the cast strip 6 are injected or blown.
  • the coolant flows out of these spaces downwards through the slot-shaped outlet openings 20a and 20b between an inner side wall 8 and the cast strip 6.
  • These outlet openings 20a and 20b are dimensioned relatively narrow, so that the coolant is stowed in the spaces 19a and 19b and consequently a certain pressure builds up.
  • FIG. 1 it is assumed that the cast strip 6 leaves the two rolls 1 and 2 or the gap 3 symmetrically and moves downwards symmetrically between the two nozzles 7a and 7b.
  • the coolant flows and the cooling effect that is to say in particular. that both sides of the belt are cooled to the same extent.
  • the same coolant pressure also prevails in both spaces 19a and 19b, so that the pressure acting on the two sides of the strip is the same.
  • FIG. 3 in which only the uppermost parts of the side walls 8 which form the actual nozzle limitation are shown in a simplified representation, shows the case where the cast strip 6 remains more firmly adhering to the roller 1 than to the roller 2 and thus the rollers or leaves the gap 3 asymmetrically.
  • nozzles could be provided which also have a nozzle wall extending to the nozzle opening on the side of the rollers. Such an embodiment would have the advantage that no sealant is required between the nozzle and the rollers. However, the execution of such nozzles may present certain difficulties for reasons of space. It is also possible to regulate the coolant flows by suitable means. For example, the position of the strip, the pressure in rooms 19a and 19b or the temperature in these rooms could be determined and the coolant flows controlled based on these measurements, in the sense that, for example, in the situation according to FIG. 3, the coolant flow on the left throttled and intensified on the right.
  • the automatic mode of operation is like it is advantageous in that the right influence is effective locally at every point.
  • the arrangement shown, where the cast strip is guided vertically from top to bottom, should be the most advantageous solution.
  • the method on which the invention is based in any casting direction. If the pouring direction is not vertical, the coolant nozzles or the coolant flows can be dimensioned differently in order to compensate for the influence of the strip weight. 15 can also be inserted sealing strips, preferably made of rubber-elastic material. or labyrinth seals of known type can also be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (9)

1. Procédé de coulée entre rouleaux dans lequel du métal est coulé de manière continue entre des rouleaux (1, 2) refroidis, tournant en sens inverse et quitte la fente (3) entre les rouleaux sous forme d'une bande solidifiée (6), caractérisé en ce qu'un courant de fluide de refroidissement (21) est amené de chaque côté de la bande le long de la surface du rouleau en direction de la fente (3) et est évacué en direction de la sortie de la bande (6) le long de celle-ci, de manière que lorsque la bande (6) adhère à l'un des rouleaux (1, 2), on refroidit moins du côté où la bande adhère et plus du côté opposé, de sorte que des tensions thermiques asymétriques par rapport à la ligne médiane prennent naissance dans la bande (6) et produisent un moment de flexion qui donne lieu à un décollage de la bande d'un rouleau sur lequel elle adhère.
2. Procédé selon la revendication 1, caractérisé en ce que le fluide de refroidissement est accumulé lors de l'écoulement à travers une fente (20a, 20b) qui est limitée par une paroi de tuyère (8) et la bande (6), le degré d'accumulation dépendant dans chaque cas de la position de la bande (6).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande coulée (6) sort vers le bas entre les rouleaux (1, 2) alors que le fluide de refroidissement est dirigé vers le haut.
4. Procédé selon l'une des revendications 1-3, caractérisé en ce que des paramètres déterminés. p. ex. la position de la bande coulée (6), les températures ou pressions dans les fluides de refroidissement ou similaire, sont mesurés et les courants de fluides de refroidissement sont commandés individuellement en fonction des résultats de mesure.
5. Installation de coulée entre rouleaux pour la mise en oeuvre du procédé selon la revendication 1, caractérisée en ce qu'à chaque rouleau (1, 2) est associée une tuyère de fluide de refroidissement (7) dont l'ouverture de sortie (20) est dirigée dans l'espace entre un rouleau (1. 2) d'un côté de la bande coulée (6) et la fente étroite (3) entre les rouleaux (1, 2).
6. Installation selon la revendication 5, caractérisée en ce que chaque rouleau (1, 2) forme une paroi de tuyère à laquelle sont adjacentes des parois frontales (10) ainsi que des parois latérales (8, 9) d'un corps de tuyère (7), chaque ouverture (18) de tuyère étant formée par un rouleau (1.2) et la paroi latérale adjacente (8).
7. Installation selon la revendication 6, caractérisée en ce que des barres d'étanchéité (14, 15) sont disposées librement dans des encoches (13) des bords des parois frontales (10) et d'une paroi latérale (9).
8. Installation selon la revendication 6 ou 7, caractérisée en ce qu'entre les parois latérales (8) des deux corps de tuyère (7), une fente est formée pour le passage de la bande coulée (6), une fente de sortie (20) pour le fluide de refroidissement restant dans chaque cas entre une paroi latérale (8) et la bande coulée (6) et les fentes de sortie (20) étant dimensionnées de manière que le fluide de refroidissement se trouve sous pression dans les espaces mentionnés.
EP87810055A 1986-02-13 1987-01-28 Procédé et dispositif de coulée continue entre rouleaux Expired EP0233147B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810055T ATE39333T1 (de) 1986-02-13 1987-01-28 Walzgiessverfahren und walzgiessanlage zur durchfuehrung desselben.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH58186 1986-02-13
CH581/86 1986-02-13

Publications (2)

Publication Number Publication Date
EP0233147A1 EP0233147A1 (fr) 1987-08-19
EP0233147B1 true EP0233147B1 (fr) 1988-12-21

Family

ID=4190318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810055A Expired EP0233147B1 (fr) 1986-02-13 1987-01-28 Procédé et dispositif de coulée continue entre rouleaux

Country Status (8)

Country Link
US (1) US4823860A (fr)
EP (1) EP0233147B1 (fr)
JP (1) JPH0783917B2 (fr)
AT (1) ATE39333T1 (fr)
CA (1) CA1293102C (fr)
DE (1) DE3760023D1 (fr)
ES (1) ES2005801B3 (fr)
GR (1) GR3000019T3 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2665652A1 (fr) * 1990-08-13 1992-02-14 Usinor Sacilor Procede et dispositif de fabrication d'une bande en acier inoxydable semi-ferritique a partir de metal en fusion.
US5725046A (en) * 1994-09-20 1998-03-10 Aluminum Company Of America Vertical bar caster
US7125612B2 (en) * 2001-02-20 2006-10-24 Alcoa Inc. Casting of non-ferrous metals
US6672368B2 (en) 2001-02-20 2004-01-06 Alcoa Inc. Continuous casting of aluminum
US7503378B2 (en) * 2001-02-20 2009-03-17 Alcoa Inc. Casting of non-ferrous metals
SE0103311D0 (sv) * 2001-10-04 2001-10-04 Siemens Elema Ab Delivery Apparatus for Pressurised Medical Liquids
KR100776043B1 (ko) 2006-12-22 2007-11-16 주식회사 포스코 비대칭형 용탕인출용 노즐
US8403027B2 (en) * 2007-04-11 2013-03-26 Alcoa Inc. Strip casting of immiscible metals
US7846554B2 (en) 2007-04-11 2010-12-07 Alcoa Inc. Functionally graded metal matrix composite sheet
US8956472B2 (en) 2008-11-07 2015-02-17 Alcoa Inc. Corrosion resistant aluminum alloys having high amounts of magnesium and methods of making the same
EP3532219B1 (fr) 2016-10-27 2023-05-31 Novelis, Inc. Alliages d'aluminium haute résistance de série 6xxx et procédés pour les fabriquer
CN109890536B (zh) 2016-10-27 2022-09-23 诺维尔里斯公司 高强度7xxx系列铝合金及其制造方法
KR102474777B1 (ko) 2016-10-27 2022-12-07 노벨리스 인크. 금속 주조 및 압연 라인

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE898135C (de) * 1948-12-19 1953-11-26 Adolf Reimitz Verfahren zum Herstellen von Blechen, Baendern, Profilen und Rohren aus Metallen durch Giessen duenner Vorprodukte im Walzenspalt
US3498362A (en) * 1967-03-09 1970-03-03 Park Ohio Industries Inc Method of forming continuous elements from molten metal
US4194553A (en) * 1978-06-05 1980-03-25 Hitachi, Ltd. Cooling and guide method and apparatus in a continuous casting machine
JPS59118247A (ja) * 1982-12-22 1984-07-07 Ishikawajima Harima Heavy Ind Co Ltd 鋼板の連続鋳造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
E. Herrmann, "Handbook on Continuous Casting", 1980, S. 63-65 bzw. 166-167 *

Also Published As

Publication number Publication date
DE3760023D1 (en) 1989-01-26
GR3000019T3 (en) 1989-10-31
CA1293102C (fr) 1991-12-17
ATE39333T1 (de) 1989-01-15
ES2005801B3 (es) 1991-04-01
US4823860A (en) 1989-04-25
JPH0783917B2 (ja) 1995-09-13
EP0233147A1 (fr) 1987-08-19
JPS62192230A (ja) 1987-08-22

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