EP0694355A1 - Coquille pour la coulée destinée à un profil d'entrée en double T - Google Patents

Coquille pour la coulée destinée à un profil d'entrée en double T Download PDF

Info

Publication number
EP0694355A1
EP0694355A1 EP95111125A EP95111125A EP0694355A1 EP 0694355 A1 EP0694355 A1 EP 0694355A1 EP 95111125 A EP95111125 A EP 95111125A EP 95111125 A EP95111125 A EP 95111125A EP 0694355 A1 EP0694355 A1 EP 0694355A1
Authority
EP
European Patent Office
Prior art keywords
strand
web
mold
continuous casting
bulges
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.)
Granted
Application number
EP95111125A
Other languages
German (de)
English (en)
Other versions
EP0694355B1 (fr
Inventor
Franciszek Kawa
Adalbert Roehrig
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.)
Concast Standard AG
Original Assignee
Concast Standard 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
Priority claimed from CH02337/94A external-priority patent/CH689223A5/de
Application filed by Concast Standard AG filed Critical Concast Standard AG
Publication of EP0694355A1 publication Critical patent/EP0694355A1/fr
Application granted granted Critical
Publication of EP0694355B1 publication Critical patent/EP0694355B1/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
    • 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

Definitions

  • the invention relates to a continuous casting mold for a double-T pre-profile according to the features of the preamble of claim 1.
  • a block mold for the continuous casting of double-T profiles is known from DE-Auslegeschrift 1 282 861.
  • the mold cavity of the mold is provided with a positive mold cavity taper on the outside of the flange and with a negative taper on the inside of the flange.
  • the mold is made in two parts along a plane parallel to the web of the double-T profile.
  • the positive and negative mold cavity taper In order to sufficiently cool the strand crust that forms in the mold and on the other hand to prevent strand jamming in the mold, the positive and negative mold cavity taper must be adapted to the steel quality, the casting temperature, the casting speed, etc. If the strand jams in the mold in the event of a fault, it can be removed from the mold by opening the two-part block mold. However, the production of such block molds is expensive. With such molds, different casting speeds easily lead to malfunctions and increased wear.
  • the invention has for its object to provide a double-T pre-profile mold that eliminates the disadvantages mentioned and in particular prevents jamming of the strand in the mold. Another objective is to cast a beam pre-profile close to the final dimensions, which requires a minimum of rolling passes. Such a double-T pre-profile with changing casting parameters, such as casting speed, casting temperature, etc., is also to be cast and at the same time the strand quality of both the surface and the structure are to be improved. Furthermore, the mold should be easy to manufacture as a tubular or block mold.
  • the geometrical extension of the strand crust of the web part can be chosen such that the shrinkage of the strand shell transverse to the direction of the strand running is completely compensated for. No tensile forces directed towards the center of the strand are applied to the two flange parts.
  • Each flange part can, for the first time, have a conical shape Profile detached billets considered and the associated mold cavity can be designed accordingly. This freedom makes it possible to provide these flange parts along their circumference on all five boundary surfaces with a conicity which converges in the direction of the strand and is calculated on the flange dimensions.
  • bulges can be provided which decrease in the strand running direction at least along a partial length of the mold cavity in such a way that the strand shells deform when they pass through the mold cavity.
  • the geometrical extension of the strand crust of the web part transverse to the direction of the strand running can also be selected such that the associated shrinkage of the strand shell is only partially compensated for.
  • tensile forces directed towards the center are introduced onto the two flange parts. These tensile forces are intended to pull the still thin strand shell of the inside of the flange, which adjoins the strand shell of the web part, towards the middle of the strand.
  • This method step allows the mold wall parts of the inner flange sides adjoining the web part to be configured essentially parallel to the direction of the strand running. This solution concept can bring advantages in particular in the case of tubular molds which are formed by means of a mandrel.
  • a deformation of the strand crust may be desirable for reasons of strand quality or to achieve an increased casting performance on further peripheral sections of the mold cavity.
  • the mold cavity at the pouring-side end of the mold on the outer sides of the two opposite flange parts and / or on the four lateral flange boundary surfaces and / or on the inner flange sides increase cross-sectional areas of the mold cavity compared to the same mold cavity sections at the end of the strand exit in the mold of bulges, and that the bow heights H of the bulges decrease in the strand running direction in such a way that during the casting operation, a strand shell forming in the mold cavity deforms as it passes through the mold cavity.
  • the web bulges can only extend over a fraction of the web length between the flanges. According to one embodiment, however, it is particularly advantageous if the web bulges extend over the entire web length up to the fillets of the flange connections.
  • the bulges can be delimited by broken, straight lines. According to one embodiment, it is proposed to limit the strand bulges by means of curved lines, preferably by means of circular lines.
  • the bulges on the web and / or on the two flanges can e.g. shortly before the mold exit, be completely reshaped or the strand may still have a residual bulge when it leaves the mold. This creates a targeted possibility of providing strand deformation at the end of the sump tip or later in the middle of the web.
  • the thickness of the web and the two flanges is dimensioned so that an optimal microstructure is achieved after the double T-beam has been rolled. Furthermore, the dimensioning of the preliminary profile close to the final dimension and a support guide that is as support-free as possible against the ferrostatic pressure should also be taken into account when determining the dimensioning. According to a further exemplary embodiment, it is additionally proposed that the ratio of web thickness to flange thickness, measured at its thinnest points, be set in the order of magnitude of 1: 1.
  • the arch height H of the bulge can decrease continuously or degressively etc. over the entire length of the mold. According to a further exemplary embodiment, it can be advantageous for the arc height H to decrease only over a partial length of the mold. Both a residual bulge or a straight mold wall with a classic casting cone can be arranged at the end of a reforming section.
  • Fig. 1, 2 is a tubular mold with a mold cavity 3.
  • the cross section of the mold cavity is composed of two flange parts 4, 4 'and a web part 5.
  • a transition radius 6 connects the cross-sectional parts mentioned.
  • a cross-sectional enlargement of the mold cavity compared to the same mold cavity sections 7 is attached along the web part 5 on both sides of the web in the form of a web bulge 8 at the end of the strand exit.
  • the web bulge 8 is reduced to zero at the end of the mold on the strand exit side, i.e. the web part 5 is delimited by straight lines 9.
  • the lines 9 represent tendons for the arch lines 10.
  • the arch height H decreases steadily, and there is a geometrical extension of the tendon belonging to the arch.
  • a strand shell that forms along the web part 5 has a bulged shape at the start of solidification, which deforms into a flat surface as the mold moves forward. If the strand shell were not simultaneously subject to shrinkage transversely to the strand movement, it would have the length of the arch line 10 at the mold exit.
  • the reduction in the arch height H is dimensioned such that a resulting geometric elongation of the chord causes the shrinkage of the strand shell of the web transversely to the strand running direction fully or partially compensated. In the example according to FIG.
  • the extension of the tendon is intended to fully compensate for the shrinkage of the strand shell of the web 5.
  • No tensile forces directed towards the center of the strand will thus arise on the two flange parts 4, 4 '.
  • the mold cavity of the two flange parts 4, 4 ' is provided along its circumference on all five boundary surfaces 12, 12', 15, 15 ', 16 and 13, 13', 17, 17 ', 18 with a conicity converging in the direction of the strand.
  • the taper can be adapted to the flange dimensions.
  • bulges 27 are arranged in the web part 5. They decrease in the direction of the strand to bulges 28 at the mold exit, ie the cast strand emerging from the mold is provided with a web part with a weak residual bulge of, for example, 1-3 mm, which can be reshaped in the strand guide, for example, during final solidification.
  • a tendon extension is provided in the web part 5 when the bulge 27 is shaped back, which only partially compensates for the shrinkage of the web 5 transverse to the direction of the strand.
  • Part of the web shrinkage is used for the design of the mold wall parts of the flange inner sides 19, 19 ', 19' ', 19' '' adjoining the web 5, which run essentially parallel to the direction of the strand, i.e. have no pouring cone.
  • This design not only makes the tools for mold manufacture much easier, it also makes it easier to deform a copper tube blank into such a double-T pre-profile mold along the inside of the flange 19.
  • an extension of the chord 33 is provided in the web part 32 when the arch height H is formed back, which completely compensates for the shrinkage of the web 32 transversely to the direction of the strand.
  • the arc heights H of the bulges decrease at least along a partial length of the mold cavity in such a way that a strand shell forming in the mold cavity deforms during the passage through the mold cavity during the casting operation.
  • the bulges provided in FIG. 3 improve the control of the solidification on these flange parts and enable higher casting speeds and / or a reduction or omission of strand supports below the mold, especially in the case of cross-sections close to the final dimensions or small preliminary profiles.
  • Fig. 4 the flange part 4 of Fig. 2 is shown in section.
  • the dimension 40 represents the length of the mold cavity 41.
  • Fig. 5 the flange part 4 'of Fig. 1 is shown in section.
  • the length of the mold is denoted by 50 and by K the conicity of the mold cavity.
  • the strand bulges extend over the entire web length to the fillets with the transition radius 6 of the flange connections.
  • the size of such fillets can be varied widely.
  • the ratio of the web thickness 30 to the flange thickness 31 of the preliminary profile is measured at its thinnest points in the order of 1: 1.
  • the invention cannot only be used for symmetrical double-T pre-profiles.
  • the teaching according to the invention can also be used in the case of asymmetrical double-T pre-profiles, such as are used, for example, for rail tracks, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Plant Substances (AREA)
EP95111125A 1994-07-25 1995-07-15 Coquille pour la coulée destinée à un profil d'entrée en double T Expired - Lifetime EP0694355B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CH2337/94 1994-07-25
CH233794 1994-07-25
CH02337/94A CH689223A5 (de) 1994-07-25 1994-07-25 Stranggiesskokille fuer ein Doppel-T-Vorprofil.
CH30595 1995-02-03
CH305/95 1995-02-03
CH30595 1995-02-03

Publications (2)

Publication Number Publication Date
EP0694355A1 true EP0694355A1 (fr) 1996-01-31
EP0694355B1 EP0694355B1 (fr) 1999-08-25

Family

ID=25684177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111125A Expired - Lifetime EP0694355B1 (fr) 1994-07-25 1995-07-15 Coquille pour la coulée destinée à un profil d'entrée en double T

Country Status (8)

Country Link
US (1) US5615731A (fr)
EP (1) EP0694355B1 (fr)
JP (1) JPH08168853A (fr)
KR (1) KR0185608B1 (fr)
AT (1) ATE183679T1 (fr)
CA (1) CA2154523C (fr)
DE (1) DE59506676D1 (fr)
ES (1) ES2138123T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875312A1 (fr) * 1997-05-02 1998-11-04 Kvaerner Metals Continuous Casting Limited Améliorations liées à et concernant la coulée
US6158498A (en) * 1997-10-21 2000-12-12 Wagstaff, Inc. Casting of molten metal in an open ended mold cavity
WO2010139437A1 (fr) * 2009-06-03 2010-12-09 Sms Concast Ag Lingotière pour la coulée continue d'ébauches de profilés, en particulier d'ébauches de profilés en double t

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508169C5 (de) * 1995-03-08 2009-11-12 Kme Germany Ag & Co. Kg Kokille zum Stranggießen von Metallen
GB9719318D0 (en) * 1997-09-12 1997-11-12 Kvaerner Clecim Cont Casting Improvements in and relating to casting
DE19859040A1 (de) * 1998-12-21 2000-06-29 Km Europa Metal Ag Kokillenrohr und Verfahren zum Rekalibrieren eines Kokillenrohrs
US6612363B1 (en) * 2002-06-10 2003-09-02 Sms Demag Inc. Beam blank mold for continuous casting
US7159834B1 (en) * 2005-06-30 2007-01-09 Conopco, Inc. Stress release mold for thermal setting compositions and systems thereof
EP2025432B2 (fr) * 2007-07-27 2017-08-30 Concast Ag Procédé destiné à la production de produits allongés en acier par coulage en continu et laminage
ES2400704T3 (es) * 2008-05-23 2013-04-11 Concast Ag Sistema de obturación de cabeza de barra fría en una coquilla de una instalación de colada continua para colar perfiles preliminares de gran formato
CN109794586B (zh) * 2019-02-27 2023-10-03 山东钢铁股份有限公司 一种适用于异形坯连铸机全保护浇铸的结晶器
CN111250668B (zh) * 2020-03-11 2024-07-09 中冶赛迪工程技术股份有限公司 一种结晶器铜管

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282861B (de) 1964-05-05 1968-11-14 British Iron Steel Research Stranggiesskokille zur Herstellung eines spaeter zu verwalzenden Profilrohlings
DE2510673A1 (de) * 1975-03-12 1976-09-23 Rossi Irving Form zum kontinuierlichen giessen von stahl
DE3204339A1 (de) * 1981-02-10 1982-12-09 Nippon Steel Corp., Tokyo Stranggusskokille fuer traegerrohlinge
US4805685A (en) 1986-02-28 1989-02-21 Sms Concast Mold for the continuous casting of beam blanks
EP0552501A2 (fr) * 1992-01-20 1993-07-28 Sms Schloemann-Siemag Aktiengesellschaft Tingotière pour la coulée continue de bande en acier

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA531090A (fr) * 1956-10-02 Rossi Irving Moule pour coulee continue
GB729490A (en) * 1951-11-14 1955-05-04 Boehler & Co Ag Geb Liquid-cooled metallic chill-mould for the continuous casting of ingots of square cross section from metals of high melting point, especially iron and steel
US3910342A (en) * 1973-11-12 1975-10-07 Rossi Irving Molds for continuous casting
US4207941A (en) * 1975-06-16 1980-06-17 Shrum Lorne R Method of continuous casting of metal in a tapered mold and mold per se
ES2056670T5 (es) * 1991-02-06 2001-02-01 Concast Standard Ag Lingotera para la colada continua de metales, particularmente de acero.
JPH0631400A (ja) * 1992-07-20 1994-02-08 Sumitomo Metal Ind Ltd 連続鋳造用装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1282861B (de) 1964-05-05 1968-11-14 British Iron Steel Research Stranggiesskokille zur Herstellung eines spaeter zu verwalzenden Profilrohlings
DE2510673A1 (de) * 1975-03-12 1976-09-23 Rossi Irving Form zum kontinuierlichen giessen von stahl
DE3204339A1 (de) * 1981-02-10 1982-12-09 Nippon Steel Corp., Tokyo Stranggusskokille fuer traegerrohlinge
US4805685A (en) 1986-02-28 1989-02-21 Sms Concast Mold for the continuous casting of beam blanks
EP0552501A2 (fr) * 1992-01-20 1993-07-28 Sms Schloemann-Siemag Aktiengesellschaft Tingotière pour la coulée continue de bande en acier

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875312A1 (fr) * 1997-05-02 1998-11-04 Kvaerner Metals Continuous Casting Limited Améliorations liées à et concernant la coulée
US6158498A (en) * 1997-10-21 2000-12-12 Wagstaff, Inc. Casting of molten metal in an open ended mold cavity
US6260602B1 (en) 1997-10-21 2001-07-17 Wagstaff, Inc. Casting of molten metal in an open ended mold cavity
WO2010139437A1 (fr) * 2009-06-03 2010-12-09 Sms Concast Ag Lingotière pour la coulée continue d'ébauches de profilés, en particulier d'ébauches de profilés en double t
EP2263815A1 (fr) * 2009-06-03 2010-12-22 Concast Ag Lingotière pour coulée continue d'ebauches de poutre

Also Published As

Publication number Publication date
US5615731A (en) 1997-04-01
CA2154523C (fr) 2001-10-16
ES2138123T3 (es) 2000-01-01
DE59506676D1 (de) 1999-09-30
JPH08168853A (ja) 1996-07-02
KR0185608B1 (ko) 1999-04-01
ATE183679T1 (de) 1999-09-15
CA2154523A1 (fr) 1996-01-26
KR960003854A (ko) 1996-02-23
EP0694355B1 (fr) 1999-08-25

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