EP0920936B1 - Lingotière pour la coulée continue - Google Patents

Lingotière pour la coulée continue Download PDF

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Publication number
EP0920936B1
EP0920936B1 EP98122281A EP98122281A EP0920936B1 EP 0920936 B1 EP0920936 B1 EP 0920936B1 EP 98122281 A EP98122281 A EP 98122281A EP 98122281 A EP98122281 A EP 98122281A EP 0920936 B1 EP0920936 B1 EP 0920936B1
Authority
EP
European Patent Office
Prior art keywords
funnel
chill mould
mold
region
casting
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
EP98122281A
Other languages
German (de)
English (en)
Other versions
EP0920936A3 (fr
EP0920936A2 (fr
Inventor
Jürgen Dr.-Ing. Sucker
Romeo Ing. Capotosti
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
Acciai Speciali Terni SpA
Original Assignee
SMS Demag AG
Acciai Speciali Terni SpA
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, Acciai Speciali Terni SpA filed Critical SMS Demag AG
Publication of EP0920936A2 publication Critical patent/EP0920936A2/fr
Publication of EP0920936A3 publication Critical patent/EP0920936A3/fr
Application granted granted Critical
Publication of EP0920936B1 publication Critical patent/EP0920936B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406—Moulds with special profile
    • 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 funnel geometry of a mold for the continuous casting of Metal with a cooled broadside and narrow side walls, funnel-shaped in the casting direction to the format of the cast strand Pouring.
  • the dimensions of the pouring area are essentially determined by the Cross section of the strand to be cast, the dimensions of the pouring tube and determines its immersion depth in the melt.
  • the strand shell Due to the funnel-shaped shape of the broad side walls takes place in the casting direction not only a rejuvenation, but also a change in shape of the Strand cross section instead.
  • the strand shell is in transit a funnel mold in contrast to a conventional continuous casting mold with flat walls forced additional deformations, which too Errors.
  • the strand shell becomes there additional deformations imposed. Besides, in this case there is none more even contact between the strand shell and the mold wall is guaranteed. Areas arise with excessively high and low strand shell temperatures, which increases the likelihood of errors.
  • the strand shell lifts partially from the mold wall from. The strong rewarming in these areas creates high levels thermal stresses that lead to errors.
  • EP 0 268 910 proposes the broad side walls in one in the pouring area to let the first section run essentially parallel to one another and in a subsequent section due to the thickness of the casting format, the first section being below the one to be set in the casting operation Casting level in the area of the first strand shell formation enough. In this way, the strand shell, which is still thin below the casting level, be guided without deformation.
  • EP 0 552 501 discloses a mold for the continuous casting of steel strip, in which the broad side walls form a funnel-shaped pouring area that leads to the Narrow side walls and in the casting direction to the format of the cast tape is reduced.
  • the funnel-shaped pouring area is through lateral arcs and determined at the tangent points with these connected arcs.
  • To reduce friction and wear and to reduce tensile and bending loads of the strand shell are the radii of the lateral arcs in a section extending at least 100 mm from the upper edge of the mold consistently trained.
  • DE 39 07 351 A1 discloses a proposal, the contour of the inner wall the pouring funnel of a mold through three tangentially touching arcs to form, the radii of which gradually increase in the direction of passage of the strand, merge into the contour of the inner wall of the mold. In this way the deformation of the metal casting strand over the greatest possible length distributed, and constrictions and cracks in the strand shell of the metal casting are avoided. An even distribution of the Shape change of the strand shell in a pouring area shaped in this way thereby achieved that their radii in the strand passage direction with the same or unequal factor increase.
  • Document WO 94/07628 discloses a mold with curved broad side inner walls, which has an upper convex and between the inlet and outlet ends have a lower parallel-walled area.
  • the mold for the production of a cast strand includes two spaced metal plates between terminal ones Walls to which they are connected. Each metal plate has an opening width and a depth dimension between the inlet and outlet ends the mold and is designed so that the dimension (t) of the mold passage across the width of the same evenly and less than the corresponding Dimension at the inlet end of the mold.
  • each end wall between the inlet and outlet ends is composed from two areas.
  • the first area extends from the outlet end to an intermediate position and has assigned coolant, whereas the second Area extends to the inlet end and is equipped with heating means, whereby in the Operation in contact with the first area stimulates the solidification of the casting metal, and is braked in contact with the second area.
  • the object of the invention based on specifying a further funnel geometry of a mold, through which Friction and wear between the strand shell and mold walls are even better reduced and especially in the formation of strand shells one too comparative high shrinking steel an even clearer reduction the failure of the slab surface due to the shrinking behavior of the Stahl's adapted tapering of the mold cross-section is realized.
  • the invention is based on the knowledge that for a given horizontal Contour of the funnel area the course of the tapering of the mold cross-section in the casting direction by the design of the vertical contour can.
  • the problem is solved with the invention in a mold of the type mentioned in the preamble of claim 1 in that the funnel geometry of the broad side inner walls in the area between a mold upper edge (1) and a corresponding mold exit edge (3) with a convex Contour is formed which has a larger taper in the upper mold area and a smaller taper in the lower mold area.
  • the lower section of the mold has a parallel-walled area, is a particularly smooth transition between the funnel area and subsequent parallel walled area in that the convex Contour with a terminal lower circular arc in the rectilinear area passes with a steady course.
  • the four different funnel contours of the broad side wall shown in FIG. 1 a mold have a funnel shape in the casting direction to the format of the cast strand tapered pouring area A or a funnel-shaped in Pouring direction tapered pouring area B to the format of the cast strand and a subsequent, essentially parallel-walled area C.
  • This The mold area or the mold outlet do not have to have parallel exit surfaces or have trailing edges.
  • the lower mold area or the lower mold outlet can have a small curvature of 1 to 15 mm in the middle area have per broad side wall.
  • the funnel contours of the broad side walls 4 are along the a straight line connecting the upper mold edge 1 and the lower mold edge 3 convex.
  • the funnel cones of the broad side walls are 4 'or 4 "or 4 '' 'between the upper edge of the mold 1 and the start of a parallel-walled area 2 convex. It can be seen that the inner contours of the Broad sidewalls over the sections a ', a "and a"' each have an arcuate shape, have a sinusoidal and a polinomial course.
  • Fig. 1 also shows that the convex sections a ', a “and a” "with a continuous Merge the course into the respective parallel-walled areas b ', b “and b” ".
  • FIG. 2 shows the tapering of the mold cross section in the casting direction of a continuous casting mold with the following parameters for the vertical inner contours shown in FIG. 1: 950 mm funnel width, 45 mm funnel depth at the upper edge of the mold plate, 900 mm funnel length, sinusoidal horizontal contour.
  • Fig. 1 to 3 point to the essential feature of the invention that unchangeable Pouring area parameters the introduction of a convex vertical Inner contour of the pouring area for a larger taper in the upper Mold area and a smaller taper in the lower mold area leads.
  • the invention provides, among other things, a use of the claimed Mold for the continuous casting of comparatively high shrinkage tending peritectic carbon steels and austenitic stainless Steel before.
  • FIG. 6 shows different vertical convex funnel contours for a continuous casting coke with the parameters already mentioned above.
  • this Funnel contours lie in the shrinkage profiles specified in FIG. 4 or the corresponding length changes shown in FIG. 5.
  • Each of the specified shrinkage profiles corresponds to a specific one Combination of steel properties and casting parameters and can by theoretical Considerations and practical experience can be determined.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (7)

  1. Lingotière pour la coulée continue de métal, comportant une zone d'entrée qui comprend des parois de grand côté et des parois de petit côté susceptibles d'être refroidies et qui va en se rétrécissant en forme d'entonnoir en direction de coulée pour prendre le format de la barre coulée,
    caractérisée en ce que
    la géométrie d'entonnoir des parois intérieures de grand côté est réalisée avec un contour convexe dans la zone entre une arête supérieure de lingotière (1) et une arête de sortie de lingotière correspondante (3), contour qui présente un grand rétrécissement dans la zone supérieure de lingotière et un petit rétrécissement dans la zone inférieure de lingotière.
  2. Lingotière selon la revendication 1, caractérisée en ce que la géométrie d'entonnoir peut présenter, pour chaque tronçon convexe A, a', a", a''', aussi bien une courbure constante sur son tracé qu'une courbure variable.
  3. Lingotière selon la revendication 2, caractérisée en ce que le contour intérieur convexe des parois de grand côté présente un tracé en forme d'arc de cercle, polygonal ou trigonométrique.
  4. Lingotière selon l'une ou plusieurs des revendications 1 à 3,
    caractérisée en ce que dans la zone d'entonnoir B les contours d'entonnoir des parois de grand côté 4', 4" ou 4"' entre l'arête supérieure de lingotière (1) et le début d'une zone (2) à parois parallèles sont réalisés convexes et se transforment, via des tronçons a', a" et a"' avec tracé en forme d'arc de cercle, sinusoïdal ou polynôme, pour former les zones respectives b', b", b"' à parois parallèles.
  5. Lingotière selon l'une ou plusieurs des revendications 1 à 4, caractérisée en ce que des tracés de retrait prédéterminés ou des modifications en longueur correspondantes sont sous-jacent(e)s aux contours d'entonnoir, et en ce qu'à chacun des tracés de retrait prédéterminés correspond une combinaison de propriétés de l'acier et de paramètres de coulée qui sont détectés par observation théorique et par expériences pratiques.
  6. Lingotière selon la revendication 5, caractérisée en ce qu'indépendamment du contour horizontal de la zone d'entrée, le rétrécissement de la section transversale de la lingotière en direction de coulée est réglable de façon variable dans de larges limites et peut par conséquent être adapté au tracé de retrait de la barre, qui dépend non seulement des propriétés de l'acier à couler, mais également d'autres paramètres de coulée, comme par exemple de la vitesse de coulée.
  7. Lingotière selon l'une ou plusieurs des revendications 1 à 6, caractérisée en ce que le contour intérieur convexe des parois de grand côté se transforme par un arc de cercle terminal en le tronçon inférieur b', b", b"' de préférence à parois parallèles.
EP98122281A 1997-12-03 1998-11-24 Lingotière pour la coulée continue Expired - Lifetime EP0920936B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19753537A DE19753537A1 (de) 1997-12-03 1997-12-03 Trichtergeometrie einer Kokille zum Stranggießen von Metall
DE19753537 1997-12-03

Publications (3)

Publication Number Publication Date
EP0920936A2 EP0920936A2 (fr) 1999-06-09
EP0920936A3 EP0920936A3 (fr) 2000-04-26
EP0920936B1 true EP0920936B1 (fr) 2003-06-18

Family

ID=7850553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98122281A Expired - Lifetime EP0920936B1 (fr) 1997-12-03 1998-11-24 Lingotière pour la coulée continue

Country Status (12)

Country Link
US (2) US6390176B1 (fr)
EP (1) EP0920936B1 (fr)
JP (1) JPH11244996A (fr)
KR (1) KR100633030B1 (fr)
CN (1) CN1187144C (fr)
AT (1) ATE243082T1 (fr)
CA (1) CA2255279C (fr)
DE (2) DE19753537A1 (fr)
ES (1) ES2205367T3 (fr)
MY (1) MY131906A (fr)
TW (1) TW380065B (fr)
ZA (1) ZA9810910B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10009073A1 (de) * 1999-11-10 2001-05-17 Sms Demag Ag Kokille zum Stranggießen von Metall mit einem gekühlte Breitseitenwände und Schmalseitenwände aufweisenden, trichterförmig verjüngten Eingießbereich
AT410766B (de) * 2001-09-28 2003-07-25 Voest Alpine Ind Anlagen Durchlaufkokille
KR100910459B1 (ko) * 2002-06-05 2009-08-04 주식회사 포스코 강의 연속주조용 주형
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
EP3067259B1 (fr) * 2013-11-06 2021-05-26 Yamaha Hatsudoki Kabushiki Kaisha Véhicule électrique de type à selle

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617608A5 (fr) * 1977-04-06 1980-06-13 Concast Ag
JPS617046A (ja) * 1984-01-26 1986-01-13 Kawasaki Steel Corp 薄肉鋳片連続鋳造用鋳型
DE3640525C2 (de) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Kokille zum Stranggießen von Stahlband
JPH02207945A (ja) * 1989-02-08 1990-08-17 Sumitomo Metal Ind Ltd 丸型鋳片の連続鋳造用モールド
DE3907351C2 (de) * 1989-03-08 1998-09-24 Schloemann Siemag Ag Eingießtrichter einer Kokille
JPH0360848A (ja) * 1989-07-31 1991-03-15 Nippon Steel Corp １８―８系オーステナイトステンレス薄板の製造方法
DE4201363C2 (de) * 1992-01-20 2000-08-10 Sms Demag Ag Kokille zum Stranggießen von Stahlband
GB9221006D0 (en) * 1992-10-06 1992-11-18 Davy Distington Ltd Continuous casting mould
JP3063518B2 (ja) * 1993-12-27 2000-07-12 株式会社日立製作所 連続鋳造装置及び連続鋳造システム
DE4403045C1 (de) * 1994-01-28 1995-09-07 Mannesmann Ag Stranggießanlage zum Führen von Strängen
JP3122352B2 (ja) * 1995-10-12 2001-01-09 三菱重工業株式会社 連続鋳造設備用モールド
JPH09192785A (ja) * 1996-01-11 1997-07-29 Hitachi Ltd 連続鋳造装置
JPH08309492A (ja) * 1996-06-05 1996-11-26 Hitachi Ltd 薄板連続鋳造装置

Also Published As

Publication number Publication date
US6390176B1 (en) 2002-05-21
CN1187144C (zh) 2005-02-02
ES2205367T3 (es) 2004-05-01
TW380065B (en) 2000-01-21
KR19990062772A (ko) 1999-07-26
US20020000305A1 (en) 2002-01-03
DE19753537A1 (de) 1999-06-10
CA2255279A1 (fr) 1999-06-03
CN1223917A (zh) 1999-07-28
EP0920936A3 (fr) 2000-04-26
JPH11244996A (ja) 1999-09-14
DE59808750D1 (de) 2003-07-24
ATE243082T1 (de) 2003-07-15
KR100633030B1 (ko) 2006-12-22
EP0920936A2 (fr) 1999-06-09
CA2255279C (fr) 2007-02-13
MY131906A (en) 2007-09-28
ZA9810910B (en) 1999-05-06

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