EP1019208B1 - Kokillenrohr für eine stranggiesskokille zum stranggiessen von stählen, insbesondere peritektischen stählen - Google Patents

Kokillenrohr für eine stranggiesskokille zum stranggiessen von stählen, insbesondere peritektischen stählen Download PDF

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Publication number
EP1019208B1
EP1019208B1 EP98948969A EP98948969A EP1019208B1 EP 1019208 B1 EP1019208 B1 EP 1019208B1 EP 98948969 A EP98948969 A EP 98948969A EP 98948969 A EP98948969 A EP 98948969A EP 1019208 B1 EP1019208 B1 EP 1019208B1
Authority
EP
European Patent Office
Prior art keywords
mould tube
insulating layer
mould
longitudinal section
thermally insulating
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
EP98948969A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1019208A1 (de
Inventor
Adrian Stilli
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
Application filed by Concast Standard AG filed Critical Concast Standard AG
Publication of EP1019208A1 publication Critical patent/EP1019208A1/de
Application granted granted Critical
Publication of EP1019208B1 publication Critical patent/EP1019208B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds

Definitions

  • the invention relates to a mold tube for a continuous casting mold Continuous casting of steels, especially peritectic steels, according to the Preamble of claim 1 and a continuous casting mold with the mold tube.
  • continuous casting of peritectic steels can improve Quality of the strand surfaces can be achieved by the initial solidification of the Continuous shell in an area of the continuous casting mold that encompasses the casting level by reducing the heat dissipation from the molten steel or the strand shell is influenced.
  • This reduction in heat dissipation in the area the initial solidification is usually with the help of continuous casting molds realized with a heat barrier on the steel side surface of a Longitudinal section of the mold cavity wall are equipped.
  • the thermal barrier is dimensioned and the longitudinal section is dimensioned so that the Heat flux density is reduced on the one hand in the area of initial solidification, on the other hand, in the longitudinal sections adjoining the heat barrier is large enough to cover the entire length of the strand in the mold cavity to achieve sufficient growth of the strand shell.
  • the mold cavity walls of a continuous casting mold in the area of a partial length, which corresponds to the position of the foundry level in the foundry comprises, on the surface delimiting the mold cavity with a To provide a thermal barrier.
  • JP 1-224 142 A is one for the production of peritectic steels provided mold, the mold cavity wall from a tubular body with a cylindrical insert arranged on the pouring side Made of steel or other materials that have a higher thermal resistance have as the material forming the tubular body.
  • This mold has the disadvantage that the insert forming the heat barrier is susceptible to wear is and special measures that make the mold more expensive are necessary are due to cracks or deformations of the mold cavity wall counteracting the thermal loads during casting operation.
  • JP 02-006 038 A is one for the casting of peritectic steels certain mold known
  • the mold cavity walls are made of copper and on the side facing away from the mold cavity Have cooling water slots.
  • the cooling water slots are in one Area surrounding the pouring mirror position at periodic intervals of 5 - 20 mm metals or ceramic materials with a lower thermal conductivity embedded as copper.
  • the embedded Materials into the mold cavity wall over a relatively large depth extend.
  • the realization of such a heat barrier is manufacturing technology complex, especially at a variety of places on the mold cavity wall suitable materials must be embedded relatively deep.
  • the invention has for its object to solve the problems mentioned to contribute and for this purpose a mold tube that is simplified with a Manufacturing technology means producible, arranged at the casting level position and is equipped with a heat barrier protected against wear, and a corresponding continuous casting mold provided with a mold tube create.
  • the mold tube according to the invention has a first, a predetermined one Pouring mirror position including longitudinal section and a second the first adjoining longitudinal section, the first longitudinal section comprises a heat-insulating layer which is dimensioned such that the heat resistance of the mold tube in the first longitudinal section a larger value has than in the second longitudinal section.
  • the mold is characterized by that the heat insulating layer has an area between the outer surface the mold tube and a distance of at most 75% of the wall thickness the mold tube, measured from the outer surface of the mold tube, fills.
  • the heat-insulating layer of the mold tube according to the invention is on or arranged close to the outside of the mold tube and is not sufficient to the inner surface of the pipe.
  • the mold tube is therefore out a tubular body that can be machined on the outside, to equip it with the heat-insulating layer.
  • the processing is with conventional methods can be carried out even for tubular bodies that are suitable for the Production of mold tubes with a small inner diameter are suitable and because of their geometrical dimensions not or only very much lavishly processed on the inside.
  • the heat-insulating layer ensures the area of the first Longitudinal section for an increase in temperature on the inside of the Mold tube.
  • the fact that the distance of the heat insulating layer from the inner surface of the mold tube at least 25% of the wall thickness of the mold tube is the wear of the mold tube during Casting operation due to the thermal and mechanical Reduced material stress in the area of the first longitudinal section, compared to a mold tube with a heat insulating layer Equipped with the same thickness on the inside of the mold tube.
  • the mold tube according to the invention it is possible to use suitable Dimensioning the thickness profile of the heat insulating layer Temperature distribution, which is found on the inner surface of the Mold tube sets, defined to adjust the growth of a To influence the strand shell in the area of the first longitudinal section in a targeted manner.
  • This degree of freedom is used in the mold according to the invention in order to to optimize them with regard to the production of peritectic steel strands.
  • the temperature on the inside during casting operation Surface of the mold tube in the area of the first longitudinal section be as high as possible.
  • the thickness of the heat-insulating layer is therefore dimensioned such that the temperature on the inside of the mold tube in the casting operation does not exceed a predetermined critical temperature T K.
  • the outer surface of the mold tube at the boundary between the Longitudinal sections are stepless.
  • This embodiment is special suitable for use in molds with water jacket cooling on the Outside of the mold tube. Because with such molds the water jacket is usually only a few mm thick and its thickness along the mold tube must be precisely controlled, enables a continuous training of the A particularly simple transition between the two longitudinal sections Construction of the water jacket cooling.
  • heat-insulating layer in a tubular body made of metal or Metal alloy is embedded.
  • a tubular body made of metal or Metal alloy is made Copper or a copper alloy and the heat insulating layer a metal, for example nickel or chrome.
  • This Materials have a good mutual expansion coefficient matched so that a nickel applied to a copper surface or chrome layer due to good adhesion and high Excellent wear resistance.
  • FIG. 1 Further embodiments of the mold tube according to the invention are thermally with regard to cooling the outer surface of the Mold tube designed with a coolant such that the temperature of the inner surface in the area of the first longitudinal section at most one predetermined critical temperature reached and at least in one Part of the first longitudinal section is approximately constant.
  • the initial solidification of the strand shell can become particularly special delayed large distance from the pouring mirror and a particularly smooth Strand surface after passing through the peritectic phase transition be achieved.
  • the thickness d of the heat insulating layer must be at least in a section between the mold level and the second Increase longitudinal section in the direction of the second longitudinal section.
  • FIG. 1A shows an example of the side view inventive mold tube 10 with a mold cavity 20, one Pouring opening 12 and a pull-out opening 13 for a (not shown) Strand.
  • the strand pull-out direction provided in the casting operation is through an arrow 14 indicated.
  • the mold tube 10 has a first Longitudinal section 1 and a second longitudinal section 2, the Longitudinal section 1 a casting level position h provided in the casting operation comprises and the longitudinal section 2 in the strand extension direction 14 to the Longitudinal section 1 connects.
  • the mold tube 10 consists of a Tubular body 15 with a heat insulating layer 16 in the area of Longitudinal section 1.
  • FIG. 1B and 1C show cross sections of the mold tube 10: FIG. 1B a cross section in the plane marked in Fig. 1A I-I in the area of Longitudinal section 1, Fig. 1C is a cross section in the in Fig. 1A marked plane II-II in the region of the longitudinal section 1.
  • the heat insulating layer 16 on the Outside 11 of the tubular body 15 is arranged.
  • the mold cavity 20 has an example of a square cross-section with rounded corners. This selection is arbitrary.
  • the mold tube according to the invention can with any cross-sectional shapes that are common in continuous casting practice be equipped.
  • FIG. 2A and 2B are longitudinal sections along the line III-III in Fig. 1B and 1C and characterize two different embodiments of the inventive mold tube 10, which are in the design of the Thickness profile of the heat insulating layer 16 in the longitudinal direction of the Distinguish mold tube. In both cases it is heat-insulating Layer 16 in a depression on the outside of the tubular body 15 embedded. In these examples, the outer surface 11 of the Mold tube 10 at the edges of the longitudinal section 1 continuously.
  • the tubular body suitably consists of copper or a copper alloy.
  • the heat insulating layer expedient metals such as nickel or chromium in question with conventional Methods, for example plating or electrochemical processes the tubular body 15 can be applied.
  • materials to build up the heat insulating layer expedient metals such as nickel or chromium in question with conventional Methods, for example plating or electrochemical processes the tubular body 15 can be applied.
  • materials to build up the heat insulating layer expedient metals such as nickel or chromium in question with conventional Methods, for example plating or electrochemical processes the tubular body 15 can be applied.
  • Materials, for example ceramic materials, for the construction of the heat-insulating layer can be used, provided they have a lower thermal conductivity than the tubular body 15 and are in terms of their Adhesion properties and their wear resistance suitable.
  • FIG. 2A of the inventive Mold tube 10 is characterized in that the heat-insulating Layer 16 in the area between the pouring mirror position h and its at the Longitudinal section 2 adjacent edge has a substantially constant thickness, which is denoted by d in FIG. 2A.
  • the temperature profile established on the inner surface 25 of the mold tube 10 can be modified in a targeted manner by a corresponding variation of the thickness of the heat-insulating layer 16 in the strand pull-out direction 14 in order to optimize the strand shell growth.
  • the exemplary embodiment of the mold tube 10 according to the invention shown in FIG. 2B is characterized in that the heat-insulating layer 16 grows in a wedge shape from a thickness d to a thickness b in the region between the pouring mirror position and its edge adjoining the longitudinal section 2.
  • the thicknesses d and b can be selected in relation to the wall thickness d W of the mold tube 10, for example, in such a way that the temperature profile on the inside 25 of the mold tube 10 in the strand pull-out direction 14 is approximately constant and reaches a predetermined value.
  • the detailed temperature profile is correlated with the strand shell growth on the surface 25.
  • the ratio d MAX / d W decreases with increasing wall thickness d W of the mold tube 10.
  • the smaller the thickness d W of the mold tube 10, the greater the proportion of the thickness of the heat-insulating layer in the total thickness d W of the mold tube 10 must be to the temperature on the inside 25 of the mold tube 10 in the longitudinal section 1 up to the critical temperature T K , in the given example T K 450 ° C to raise.
  • d MAX / d W is the greater the smaller f, ie the greater the thermal conductivity ⁇ i of the heat-insulating layer.
  • the parameter range f 4 4 is therefore preferred in addition to the condition d MAX / d W Schicht 75%.
  • the length of the mold tube 10 is typically 80-100 cm.
  • the length the length section 1 is preferably in the range 10-15 cm, the Casting level position preferably in the upper quarter of the length section 1 is located.
  • the is heat-insulating Layer 16 is always embedded in a recess in the tubular body 15 in such a way that the outer surface 11 of the mold tube 10 is of stepless design.
  • the inventive idea could also be based on an embedding of the heat-insulating layer 16 in a recess or on a stepless Formation of the outer surface 11 can be dispensed with.
  • the surfaces 11 and 25 of the mold tube according to the invention could also be provided with coatings suitable materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
EP98948969A 1997-10-01 1998-09-14 Kokillenrohr für eine stranggiesskokille zum stranggiessen von stählen, insbesondere peritektischen stählen Expired - Lifetime EP1019208B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH229797 1997-10-01
CH229797 1997-10-01
PCT/EP1998/005828 WO1999016564A1 (de) 1997-10-01 1998-09-14 Kokillenrohr für eine stranggiesskokille zum stranggiessen von stählen, insbesondere peritektischen stählen

Publications (2)

Publication Number Publication Date
EP1019208A1 EP1019208A1 (de) 2000-07-19
EP1019208B1 true EP1019208B1 (de) 2002-08-14

Family

ID=4230492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98948969A Expired - Lifetime EP1019208B1 (de) 1997-10-01 1998-09-14 Kokillenrohr für eine stranggiesskokille zum stranggiessen von stählen, insbesondere peritektischen stählen

Country Status (11)

Country Link
EP (1) EP1019208B1 (es)
JP (1) JP4393698B2 (es)
AR (1) AR015459A1 (es)
AT (1) ATE222150T1 (es)
CZ (1) CZ289354B6 (es)
DE (1) DE59805207D1 (es)
ES (1) ES2182361T3 (es)
RU (1) RU2203158C2 (es)
TW (1) TW483783B (es)
WO (1) WO1999016564A1 (es)
ZA (1) ZA988870B (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11458649B2 (en) * 2018-05-23 2022-10-04 Petroleo Bracileiro S.A.—Petrobras De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freeze-casting

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19852473C5 (de) * 1998-11-13 2005-10-06 Sms Demag Ag Kokillenplatte einer Stranggießanlage
WO2016013186A1 (ja) * 2014-07-24 2016-01-28 Ｊｆｅスチール株式会社 鋼の連続鋳造方法
KR101941506B1 (ko) * 2014-10-28 2019-01-23 제이에프이 스틸 가부시키가이샤 연속 주조용 주형 및 강의 연속 주조 방법
CN109843473B (zh) * 2016-10-19 2022-01-28 杰富意钢铁株式会社 连续铸造用铸模以及钢的连续铸造方法
RU2678556C1 (ru) * 2017-09-18 2019-01-29 Акционерное общество "Первоуральский новотрубный завод" (АО "ПНТЗ") Гильза кристаллизатора для непрерывной разливки сталей

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE758996A (fr) * 1969-11-14 1971-04-30 Kabel Metallwerke Ghh Lingotiere de coulee continue pour la coulee d'un metal, en particulierde l'acier
EP0030308A1 (de) * 1979-11-27 1981-06-17 Concast Holding Ag Stranggiesskokille zum Giessen von Stahl
SU904877A1 (ru) * 1980-01-10 1982-02-15 Институт черной металлургии Металлический холодильник дл формировани слитка
JPH01170550A (ja) * 1987-12-24 1989-07-05 Nkk Corp 鋼の連続鋳造用鋳型
JPH01224142A (ja) * 1988-03-03 1989-09-07 Sumitomo Metal Ind Ltd 連続鋳造用鋳型
JPH026038A (ja) * 1988-06-27 1990-01-10 Nkk Corp 鋼の連続鋳造用鋳型
DE3909900A1 (de) * 1989-03-25 1990-10-18 Thyssen Stahl Ag Stranggiesskokille zum giessen von stahlband

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11458649B2 (en) * 2018-05-23 2022-10-04 Petroleo Bracileiro S.A.—Petrobras De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freeze-casting

Also Published As

Publication number Publication date
DE59805207D1 (de) 2002-09-19
CZ289354B6 (cs) 2002-01-16
AR015459A1 (es) 2001-05-02
TW483783B (en) 2002-04-21
ATE222150T1 (de) 2002-08-15
ES2182361T3 (es) 2003-03-01
RU2203158C2 (ru) 2003-04-27
JP2001518394A (ja) 2001-10-16
EP1019208A1 (de) 2000-07-19
CZ20001187A3 (en) 2001-06-13
WO1999016564A1 (de) 1999-04-08
ZA988870B (en) 1999-04-01
JP4393698B2 (ja) 2010-01-06

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