EP0972590B1 - Lingotière de coulée continue - Google Patents

Lingotière de coulée continue Download PDF

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Publication number
EP0972590B1
EP0972590B1 EP99111052A EP99111052A EP0972590B1 EP 0972590 B1 EP0972590 B1 EP 0972590B1 EP 99111052 A EP99111052 A EP 99111052A EP 99111052 A EP99111052 A EP 99111052A EP 0972590 B1 EP0972590 B1 EP 0972590B1
Authority
EP
European Patent Office
Prior art keywords
continuous casting
mould
mold
wall
casting mould
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 - Lifetime
Application number
EP99111052A
Other languages
German (de)
English (en)
Other versions
EP0972590A1 (fr
Inventor
Hans Streubel
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.)
SMS Siemag AG
Original Assignee
SMS Demag 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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0972590A1 publication Critical patent/EP0972590A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059—Mould materials or platings
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs

Definitions

  • the invention relates to a continuous casting mold for the manufacture of slabs, which has water-cooled narrow and broad side walls, in particular for the manufacture of thin slabs, in which case a pouring funnel is formed in the broad side walls thereof, which are made of copper plates, on the inside, between an area that runs parallel to the two narrow sides and on the other hand cooling grooves are provided on the outside or on the back.
  • the thin slabs produced on continuous casting plants serve as preliminary strips for the production of hot wide strip with final thicknesses between, for example, 1 to 12 mm.
  • the funnel-shaped mold with the immersion tube immersed in the pouring funnel is at the heart of the CSP casting process.
  • the heat dissipation in the area of the bath level and the service life of the mold are of particular importance here, since in the mold with the first solidification that begins there, the via the immersion tube supplied molten steel melt the surface quality of the thin slab strand is significantly influenced. These criteria apply equally to the production of slabs of the dimension range 320 to 150 x 3,000 to 800 mm with the aid of a plate mold which then generally does not require a pouring funnel.
  • the strand shell growth is essentially determined by the casting powder, the copper wall thickness between the cooling channel and the working side and the flow speed in the cooling channels. It has been shown that the main cause for the development of longitudinal cracks in the strand shell, there is an irregular and / or excessive heat dissipation across the width and height in the upper mold area. The uneven heat dissipation is due to different thicknesses of the lubricating film between the strand shell and the copper wall.
  • the invention has for its object to provide a continuous casting mold of the type mentioned, with which the surface quality of the thin slab to be cast can be improved, in particular the occurrence of longitudinal cracks avoided, at least minimized.
  • the rear sides of the broad side walls are reinforced starting from below the deepest level of the bath level by a largest armor there, tapering increasingly in the continuous casting direction.
  • the one introduced into the mold leads; on the mold walls solidifying steel melt to the known temperature profile, the so-called temperature belly in the mold plate.
  • the armor according to the invention the starting point of which is determined taking into account the contour of the bath level, which is dependent on the casting speed, and which after one previous rise or transition over a short distance in the casting direction begins about 20 to 50 mm below the meniscus with its greatest thickness, reduce the rather rapid temperature drop below the temperature belly.
  • the mitigation of the temperature drop can be further promoted. Because after the short climb, the first section, about 20 to 100 mm long, with maximum armor thickness, which can be 3 to 15 mm depending on requirements, is where the heat dissipation is otherwise too high and prevents thicker armouring here thus that the heat dissipation from the cooling water side is forced beyond charge.
  • An embodiment of the invention provides that the wall armor decreases as far as the transition from the pouring funnel to the mold-determining end section which adjoins this in the continuous casting direction. In this way it is achieved that the copper wall thickness in front of water decreases over the length of the cooling grooves and thus the heat dissipation over the mold height can be influenced in a targeted manner.
  • the thickness of the wall armor varies over the mold width and height in accordance with the temperature distribution in the mold.
  • the thus different course of the groove geometry in the copper plate favors the desired temperature equalization over the height and width of the mold by armoring designed according to the temperature decrease depending on the casting parameters.
  • FIG. 1 One of the two complementary broad side walls 2 is shown schematically in FIG. 1 of a continuous casting mold 1 of a casting machine for producing thin slabs which is known as such. These are designed to hold a dip tube (not shown) on the inside with a pouring funnel 3 and on their outside with cooling grooves 4 through which water flows (cf. also FIG. 3).
  • the edge regions 5 of the two complementary broad side walls 2, each of which extends towards the narrow sides next to the pouring funnel 3, run parallel to one another.
  • the mold walls pass into the format-determining casting cross section 7 (cf. FIG. 3).
  • the liquid steel melt introduced into the continuous casting mold 1 up to the bath level 8 cools down over the height of the mold with a very rapid temperature drop, which leads to stresses in the continuous shell forming in the continuous casting direction 6, which cause longitudinal cracks, which primarily occur in the continuous shell up to about 150 mm below the bath level 8 can be determined.
  • the bath level 8 is at a distance of, for example, 20 to 60 mm from the The upper edge of the mold, and starting from this, characterizes the cooling behavior of the molten steel melt, which in the mold plates leads to a so-called temperature belly 9, shown schematically in FIG. 2, the curve characterizing this showing the significant temperature drop below it.
  • the rear sides 10 of the broad side walls 2 have been reinforced by a wall armor 11, which tapers in the continuous casting direction and with their wedge tip, compared to the contour hitherto shown in dashed lines in FIG. 1 approximately in the transition 12 (see FIG. 3) from the pouring funnel 3 to the subsequent format-determining pouring cross section 7.
  • the wall armor 11 is about 20 to 50 mm below the deepest bath level 8, as shown in Fig. 3 according to the developing meniscus of the bath level, and its course is adjusted across the width of the mold.
  • the head end 11 a - which is preceded by a transition that rises over a short distance - the wall armor 11 thus still protrudes into the region of the temperature bulb 9 and extends in this uppermost section over a distance 13 of approximately 20 to 100 mm parallel to the mold wall before it then changes into the tapering slope.
  • the wall armouring 11 which varies not only over the height but also over the width of the continuous casting mold and decreases steadily in the continuous casting direction 6, the working temperature is increased in the sections with a thicker wall armouring and thus in particular the abrupt drop in temperature below the " Club "of the temperature belly 9 significantly weakened, ie the heat dissipation over the height and width of the continuous casting mold 1 is evened out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Led Devices (AREA)

Claims (4)

  1. Lingotière de coulée continue pour la fabrication de brames, qui présente des parois latérales étroites et larges refroidies à l'eau, notamment pour la fabrication de brames minces, dans laquelle il est prévu, dans ses parois latérales larges (2) consistant en plaques de cuivre, d'une part à l'intérieur, entre une zone s'étendant respectivement en direction des deux côtés étroits, un entonnoir de remplissage (3) et d'autre part, à l'extérieur ou sur le côté arrière, des gorges de refroidissement (4), caractérisée en ce que les côtés arrière (10) des parois latérales larges (2), en partant du dessous d'un niveau de bain le plus bas (8), sont renforcées par un blindage de paroi (11) qui atteint là son maximum et se rétrécit de plus en plus dans le sens de la coulée continue (6).
  2. Lingotière de coulée continue selon la revendication 1, caractérisée en ce que le blindage de la paroi (11) diminue jusqu'à la transition (12) de l'entonnoir de remplissage (3) vers la section terminale de lingotière (7) se raccordant à celui-ci dans le sens de la coulée continue (6).
  3. Lingotière de coulée continue selon la revendication 1 ou 2, caractérisée en ce que le blindage de la paroi (11) varie sur la largeur et la hauteur de la lingotière en fonction de la répartition de la température dans la lingotière.
  4. Lingotière de coulée continue selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une extrémité sommitale (11a) limitée dans sa longueur du blindage de la paroi (11) s'étend parallèlement à la paroi de la lingotière.
EP99111052A 1998-07-16 1999-06-14 Lingotière de coulée continue Expired - Lifetime EP0972590B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19831998A DE19831998A1 (de) 1998-07-16 1998-07-16 Stranggießkokille
DE19831998 1998-07-16

Publications (2)

Publication Number Publication Date
EP0972590A1 EP0972590A1 (fr) 2000-01-19
EP0972590B1 true EP0972590B1 (fr) 2004-03-31

Family

ID=7874288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99111052A Expired - Lifetime EP0972590B1 (fr) 1998-07-16 1999-06-14 Lingotière de coulée continue

Country Status (5)

Country Link
US (1) US6474401B1 (fr)
EP (1) EP0972590B1 (fr)
JP (1) JP4836303B2 (fr)
AT (1) ATE262993T1 (fr)
DE (2) DE19831998A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1436106A2 (fr) * 2001-10-18 2004-07-14 SMS Demag Aktiengesellschaft Procede et dispositif pour optimiser la capacite de refroidissement d'une coquille de coulee continue pour metaux liquides, notamment acier liquide
DE10304543B3 (de) * 2003-02-04 2004-05-27 Sms Demag Ag Verfahren und Einrichtung zum Stranggießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen
CN1292858C (zh) * 2004-01-17 2007-01-03 宝山钢铁股份有限公司 一种水冷的金属连铸结晶器
US7000676B2 (en) * 2004-06-29 2006-02-21 Alcoa Inc. Controlled fluid flow mold and molten metal casting method for improved surface
DE102006036708A1 (de) * 2006-08-05 2008-02-07 Sms Demag Ag Stranggießkokille für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe
WO2012115272A1 (fr) * 2011-02-25 2012-08-30 東邦チタニウム株式会社 Four de fusion pour la fusion de métal
CN105057613B (zh) * 2015-09-15 2018-07-06 西峡龙成特种材料有限公司 一种板坯连铸倒角结晶器窄面铜板

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280229A (en) * 1975-12-27 1977-07-05 Ono Atsumi Mould for continuous casting
JPS6027572Y2 (ja) * 1981-09-03 1985-08-20 合同製鉄株式会社 連続鋳造鋳型
JPS61195746A (ja) * 1985-02-25 1986-08-30 Sumitomo Metal Ind Ltd 連続鋳造用鋳型
DE3627991A1 (de) * 1986-08-18 1988-02-25 Mannesmann Ag Verfahren zum stranggiessen von brammen und einrichtung zur durchfuehrung des verfahrens
DE3640525C2 (de) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Kokille zum Stranggießen von Stahlband
US5176197A (en) * 1990-03-30 1993-01-05 Nippon Steel Corporation Continuous caster mold and continuous casting process
DE4233522A1 (de) * 1992-04-04 1993-10-07 Schloemann Siemag Ag Verfahren zur Herstellung einer Kokillenbreitseitenwand für eine Dünnbrammengießanlage
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
IT1267243B1 (it) * 1994-05-30 1997-01-28 Danieli Off Mecc Procedimento di colata continua per acciai peritettici
JPH1058093A (ja) * 1996-08-23 1998-03-03 Sumitomo Metal Ind Ltd 鋼の連続鋳造方法

Also Published As

Publication number Publication date
DE19831998A1 (de) 2000-01-20
EP0972590A1 (fr) 2000-01-19
JP4836303B2 (ja) 2011-12-14
ATE262993T1 (de) 2004-04-15
DE59908998D1 (de) 2004-05-06
JP2000033461A (ja) 2000-02-02
US6474401B1 (en) 2002-11-05

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