US20100000704A1 - Extrusion die for liquid metals, in particular for liquid - Google Patents

Extrusion die for liquid metals, in particular for liquid Download PDF

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Publication number
US20100000704A1
US20100000704A1 US12/374,763 US37476307A US2010000704A1 US 20100000704 A1 US20100000704 A1 US 20100000704A1 US 37476307 A US37476307 A US 37476307A US 2010000704 A1 US2010000704 A1 US 2010000704A1
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United States
Prior art keywords
coolant
continuous
mold
section
casting mold
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.)
Abandoned
Application number
US12/374,763
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English (en)
Inventor
Hans Streubel
Gereon Fehlemann
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SMS Siemag AG
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Individual
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Filing date
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Assigned to SMS DEMAG AKTIENGESELLSCHAFT reassignment SMS DEMAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STREUBEL, HANS, GIRGENSOHN, ALBRECHT, FEHLEMANN, GEREON
Publication of US20100000704A1 publication Critical patent/US20100000704A1/en
Abandoned 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
    • B22D11/055—Cooling the moulds
    • 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 molten metals, in particular, for molten steel, comprising mold side plates surrounded by water boxes for the circulation of coolant, the side plates defining a mold cavity with a straight and/or curved path, and mold end plates composed of copper, on the outer cold face of which a plurality of coolant passages are provided that generally at the upper melt surface have a minimum coolant-passage flow cross-section with a thickness reduction of the respective mold side plate.
  • the temperature of the mold surface on the inner hot face is also extremely variable.
  • the locally higher surface temperatures on the mold hot face also result in greater wear in these regions that can turn up in local distortion faults or cracking.
  • the entire mold plate face, including the less-worn or still-usable surface portions must be resurfaced, a step that can only by effected by milling off or other machining techniques.
  • the continuous-casting mold identified above is known from DE 102 26 214 [U.S. Pat. No. 7,363,958].
  • the cassette-like inserts therein composed of copper alloy rest on steel insert plates and can be replaced.
  • the thickness of the copper plates here between the coolant and the hot face of the copper plates varies over the width and/or the height of the mold.
  • This thickness at the coolant-passage flow cross-section at the upper melt surface is designed with a minimum size, while in the lower regions this thickness is always larger, the thickness in the lower region of the copper plate also always being made larger. None of these measures is able to prevent the above-described wear of the copper plates after a number of casting cycles.
  • the fundamental problem to be solved by the invention is to reduce the varying thermal loads on the continuous-casting mold within the mold side plate, thereby reducing wear.
  • the surface temperatures of the mold hot face are reduced in regions that are subject to especially high thermal loads, and as a result both the mechanical load on the strand shell is reduced and also the service like of the continuous-casting mold is improved.
  • This positive effect of a noticeable reduction in surface temperatures of the mold side plate occurs when the spacing between the coolant passages and the surface of the mold in the new state is reduced by at least 20%.
  • the previous new state can be assumed to be 20 mm to approximately 40 mm plate thickness, depending on how the broad-side mold thickness is specified for the relevant casting strand thickness.
  • the previously employed thickness values for the broad-side mold plates are thus assumed. Given the currently presumed conditions, this corresponds to a reduction in the spacing of 5 mm starting from the new thickness, which is thus reduced. In the end, the spacing should not be become less than 5 mm during the entire operation for reasons of safety.
  • the thickness in the new state typically measures 25 mm. This value is now reduced by 5 mm (20%) down to 20 mm.
  • coolant-passage flow cross-section at the upper melt surface is reduced proportionally to the reduction in the thickness of the mold side plate.
  • coolant-passage flow cross-section is not reduced more than 80% of the new state of the initial coolant-passage flow cross-section.
  • the mold side plates ( 2 ) be reduced in thickness ( 6 ) between 5 mm and 10 mm up to a maximum of 15 mm in 3-10 resurfacings, where a single resurfacing consists in a removal of copper material amounting to 0.3 mm to 1.5 mm, at maximum 3 mm.
  • the filler piece for reducing the coolant-passage flow cross-section is adjustable.
  • At least the mold side plates are designed as cassette plates that on the outer cold face rest on cooled adapter plates and are expandable.
  • a development based thereon is created by providing a separate displacement body on the adapter plate to form the minimum coolant-passage flow cross-section.
  • the displacement body can be designed having different shapes, stored, and attached in a replaceable manner.
  • FIG. 1 is a perspective view of a continuous-casting mold with the front mold side plate omitted to expose the view into the interior into which the immersion lance is lowered;
  • FIG. 2 is a planar vertical partial section through a mold side plate that shows the thickness(es) of the copper plate in connection with the proportions of the coolant passage over the height of the mold;
  • FIG. 3 illustrates a planar vertical partial section, as in FIG. 2 but with an adapter plate
  • FIG. 4 is a view toward the outer face of the mold side plate with its filler piece or adapter plate removed.
  • the continuous-casting mold 1 ( FIG. 1 ) is formed by two wide mold side plates 2 defining a mold cavity 1 b and by narrow plates 3 located at the ends, a coolant 1 a (such as, for example, water) flowing through coolant passages 4 ( FIGS. 2 through 4 ) under pressure.
  • a coolant 1 a such as, for example, water
  • regions 5 a and 5 b of different heat-flux density are created by an immersion lance 12 in at a region adjacent the upper melt surface 5 .
  • the heat-flux density in the regions 5 a is higher than in the region 5 b .
  • different heat flux densities are also created by the molten steel flowing out of the immersion lance 12 , these occurring even in the case of a funnel-shaped upper widening 11 of the mold inlet.
  • a thickness 6 of the mold side plate 2 typically measuring in the new state between 20 mm and 40 mm, is considered to be 100%.
  • the corrected new state in the region of the upper melt surface, as illustrated is only 80%, while a further reduction, resulting from resurfacing for wear, of thickness 6 reduced initially to 80% is limited to approximately 5 mm final thickness 6 a ( FIG. 2 ).
  • a coolant-passage flow cross-section 7 at the upper melt surface region 5 can be reduced proportionally so as to reduce the thickness 6 of the mold side plate 2 ( FIG. 2 ) in order to further improve the cooling effect.
  • FIG. 2 shows the resulting final thickness 6 a of the mold side plate 2 after a plurality of resurfacings for wear, cracks, and the like on the hot face, where a single resurfacing can consist in a removal of copper material ranging from 0.3 mm-1.5 mm, at maximum 3.0 mm.
  • the coolant-passage flow cross-section 7 is created in each case by a filler piece 10 attached on the outer face and composed of ambient-temperature-resistant material.
  • the filler piece can be adjustable at least to reduce the coolant-passage flow cross-section 7 .
  • FIG. 3 illustrates an embodiment of continuous-casting mold 1 for a two-part cassette mold, the upper melt surface 5 being shown together with the region 5 a of higher heat-flux density in a pour direction 13 within the funnel 11 .
  • the so-called cassette mold is composed essentially of the above-described mold side plate 2 and an adapter backing plate 14 , between which the coolant passage 4 runs and through which the coolant 1 a is circulated.
  • the individual coolant passages 4 in the region below the upper melt surface 5 can be milled more deeply into the material.
  • Correspondingly shaped displacement bodies 15 reduce the coolant-passage flow cross-section 7 and increase the coolant speed in this region.
  • At least the mold side plates 2 are designed as cassette plates that on the outer face rest in expandable form on cooled adapter plates 14 that do not necessarily have to be composed of copper alloy.
  • a separate displacement body 15 is provided here on the adapter plate 14 to form the minimum coolant-passage flow cross-section 7 .
  • the displacement body 15 is designed with different shapes, and can be stored and replaced.
  • the coolant passages 4 are provided in groups in a width direction 8 in the mold side plate 2 . Both the reduction of thickness 6 of the mold side plates 2 as well as the reduction in the coolant-passage flow cross-section 7 are effected as a function of a dissimilar position of the given coolant passage 4 in the width direction 8 . It is possible to create groups of different numbers of coolant passages 4 . Fastening threaded holes 16 are provided between the vertical rows of the coolant passages 4 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US12/374,763 2006-08-05 2007-07-31 Extrusion die for liquid metals, in particular for liquid Abandoned US20100000704A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006036708A DE102006036708A1 (de) 2006-08-05 2006-08-05 Stranggießkokille für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe
DE102006036708.1 2006-08-05
PCT/EP2007/006763 WO2008017402A1 (de) 2006-08-05 2007-07-31 Stranggiesskokille für flüssige metalle, insbesondere für flüssige stahlwerkstoffe

Publications (1)

Publication Number Publication Date
US20100000704A1 true US20100000704A1 (en) 2010-01-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/374,763 Abandoned US20100000704A1 (en) 2006-08-05 2007-07-31 Extrusion die for liquid metals, in particular for liquid

Country Status (5)

Country Link
US (1) US20100000704A1 (de)
EP (1) EP2049286B1 (de)
CN (1) CN101489703B (de)
DE (1) DE102006036708A1 (de)
WO (1) WO2008017402A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8939191B2 (en) 2008-07-10 2015-01-27 Sms Siemag Aktiengesellschaft Temperature measurement in a chill mold by a fiber optic measurement method
EP4215296A1 (de) * 2021-12-23 2023-07-26 SMS Group GmbH Breitseitenkokillenplatte, stranggiesskokille und verfahren zum herstellen einer breitseitenkokillenplatte

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008032672A1 (de) * 2008-07-10 2010-01-14 Sms Siemag Aktiengesellschaft Stranggießkokille
WO2010015399A1 (de) * 2008-08-06 2010-02-11 Sms Siemag Ag Stranggiesskokille für flüssiges metall, insbesondere für flüssigen stahl
ITUB20154787A1 (it) * 2015-11-06 2017-05-06 Milorad Pavlicevic Cristallizzatore perfezionato e lingottiera adottante detto cristallizzatore

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658884A (en) * 1984-03-28 1987-04-21 Mannesmann Ag Mold for continuous casting of rounds or billets
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
US5611390A (en) * 1994-06-06 1997-03-18 Danieli & C. Officine Meccaniche Spa Continuous-casting crystalliser with increased heat exchange and method to increase the heat exchange in a continuous-casting crystalliser
US6367539B1 (en) * 1999-01-13 2002-04-09 Danieli & C. Officine Meccaniche Spa Crystalliser for continuous casting
US20020129922A1 (en) * 2000-11-16 2002-09-19 Uwe Plociennik Mold for continuous casting of strands
US6474401B1 (en) * 1998-07-16 2002-11-05 Sms Schloemann-Siemag Aktiengesellschaft Continuous casting mold
US20030010471A1 (en) * 2001-05-02 2003-01-16 Grove John A. Continuous casting mold and method
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die
US20060102313A1 (en) * 2002-06-13 2006-05-18 Gereon Fehlemann Continuous casting mold for liquid metals, especially for liquid steel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2584318Y (zh) * 2002-10-29 2003-11-05 张桂银 一种可调式结晶器水套
DE10358853A1 (de) 2003-12-16 2005-07-14 Km Europa Metal Ag Stranggießkokille
CN2681837Y (zh) * 2004-01-12 2005-03-02 宝山钢铁股份有限公司 薄板坯连铸结晶器宽面铜板

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658884A (en) * 1984-03-28 1987-04-21 Mannesmann Ag Mold for continuous casting of rounds or billets
US5467810A (en) * 1994-04-01 1995-11-21 Acutus Industries Continuous metal casting mold
US5611390A (en) * 1994-06-06 1997-03-18 Danieli & C. Officine Meccaniche Spa Continuous-casting crystalliser with increased heat exchange and method to increase the heat exchange in a continuous-casting crystalliser
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die
US6474401B1 (en) * 1998-07-16 2002-11-05 Sms Schloemann-Siemag Aktiengesellschaft Continuous casting mold
US6367539B1 (en) * 1999-01-13 2002-04-09 Danieli & C. Officine Meccaniche Spa Crystalliser for continuous casting
US20020129922A1 (en) * 2000-11-16 2002-09-19 Uwe Plociennik Mold for continuous casting of strands
US20030010471A1 (en) * 2001-05-02 2003-01-16 Grove John A. Continuous casting mold and method
US20060102313A1 (en) * 2002-06-13 2006-05-18 Gereon Fehlemann Continuous casting mold for liquid metals, especially for liquid steel
US7363958B2 (en) * 2002-06-13 2008-04-29 Sms Demag Ag Continuous casting mold for liquid metals, especially for liquid steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8939191B2 (en) 2008-07-10 2015-01-27 Sms Siemag Aktiengesellschaft Temperature measurement in a chill mold by a fiber optic measurement method
EP4215296A1 (de) * 2021-12-23 2023-07-26 SMS Group GmbH Breitseitenkokillenplatte, stranggiesskokille und verfahren zum herstellen einer breitseitenkokillenplatte

Also Published As

Publication number Publication date
EP2049286A1 (de) 2009-04-22
EP2049286B1 (de) 2017-12-27
WO2008017402A1 (de) 2008-02-14
CN101489703A (zh) 2009-07-22
DE102006036708A1 (de) 2008-02-07
CN101489703B (zh) 2011-09-28

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AS Assignment

Owner name: SMS DEMAG AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STREUBEL, HANS;FEHLEMANN, GEREON;GIRGENSOHN, ALBRECHT;REEL/FRAME:022142/0318;SIGNING DATES FROM 20081203 TO 20081227

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION