US3656537A - Apparatus for producing continuously cast sections with agitation of the liquid core - Google Patents

Apparatus for producing continuously cast sections with agitation of the liquid core Download PDF

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Publication number
US3656537A
US3656537A US62794A US3656537DA US3656537A US 3656537 A US3656537 A US 3656537A US 62794 A US62794 A US 62794A US 3656537D A US3656537D A US 3656537DA US 3656537 A US3656537 A US 3656537A
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US
United States
Prior art keywords
casting
liquid
inductor
traveling
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
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US62794A
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English (en)
Inventor
Axel Von Starck
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SMS Elotherm GmbH
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AEG Elotherm GmbH
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Publication date
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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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields

Definitions

  • the molten metal for example molten steel
  • the metal is usually poured continuously or intermittently into an open-ended mold. Inside the mold the metal contacts the cooled walls of the mold and solidifies from the exterior to the interior permitting a continuous casting comprising a thin shell about a liquid core to be withdrawn from the bottom of the open-ended mould.
  • the emerging casting is usually guided a considerable distance between a system of supporting rollers and drive rollers, the drive rollers operating to withdraw the casting from the mold.
  • the cooling and solidification of the casting progresses inwardly to the center until the entire cross section of the casting is finally solid.
  • the object of the present invention to provide an arrangement for controlling the solidification of continuous castings so that formation of undesirable dendrite crystals and the segregation of impurities are inhibited.
  • This is accomplished in the embodiment of the invention described below by generating an electromagnetic field having a component normal to the path of travel of the casting through the mould.
  • This field agitates the liquid center of the mold.
  • the field is produced by a traveling field inductor in the form of the stator of a linear motor located adjacent the casting at a position below the open-ended mold and disposed so that the direction of propagation of the generated traveling field contains at least one component normal to the direction of movement of the casting so that motion is imparted to the liquid metal in the interior .of the casting.
  • traveling field inductor is preferably disposed so that the direction of propagation of the generated traveling field is parallel or substantially parallel to the wider side of the casting.
  • means are provided for alternately energizing and de-energizing the traveling field inductor and/or for reversing its polarity whereby the generated motion of the metal may be altered by continuously or discontinuously varying the inductor voltage.
  • FIG. I is a schematic representation of a continuous casting plant for the production of slabs according FIG. 2 is a section taken on the line 1-1 of FIG. 3, and
  • FIG. 3 is a section taken on the line II-II of FIG. 2.
  • an open-ended mould 2 which is cooled by a liquid coolant which circulates through a suitable network (not shown).
  • a supporting and withdrawing system comprising a plurality of rollers 3 is provided adjacent the exit of mould 2.
  • the liquid metal is continuously or intermittantly poured into mould 2 from a pouring system 4, and, as the liquid metal contacts the cooled mould wall, it solidifies, thus forming a continuous metal casting 5 comprising a solid shell surrounding a liquid core 6.
  • Casting 5 is continuously withdrawn from the bottom of mould 2 and passes through a supporting roller apron 7.
  • traveling field inductors 9 each comprising a flat elon' gated and slotted laminated iron core 10 which carries a polyphase bar winding 11.
  • Bar winding 11 is designed so that upon application thereto of a polyphase electrical sine-wave voltage, the resultant current through winding 11 produces a traveling electromagnetic field in the form of a sine wave that is 30 propagated along the length of inductor 9.
  • Such windings are well known in the art and any suitable type can be employed.
  • the direction of propagation of the traveling field is preferably parallel to the wider side face of casting 5 i.e. normal to the plane of the paper in FIG. 1.
  • the pole face 12 of a traveling field inductor 9 which is only schematically shown in this view, is mounted parallel to the wider side face of the casting 5 and the direction of propagation of the traveling field as shown by arrow 13 is normal to the direction of movement of the casting as shown by arrow 14.
  • the traveling field inductor 9 comprises a laminated iron core 10 and the overhang 15 of a bar winding received into the slots of laminated iron core 10.
  • a parting plate 16 of non-magnetic material preferably shields bar winding 11 from the radiant heat of hot casting 5 and is preferably separated from bar winding 11 by a suitable insulating layer.
  • casting 5 While subject to the electromagnetic field, casting 5 already has a frozen outside shell 17 which encloses a core zone 6 that is still liquid. Under the effect of the traveling field which is 50 generated by the inductor 9 and propagated in the direction of arrow 13, currents are induced in the liquid core 6 of the casting and, in cooperation with the traveling field, these currents cause the liquid metal to attempt to flow in the direction of propagation of the traveling field, as generally indicated by arrows 20. Thus on each side of the zone influenced by the inductor the flowing metal circulates through a butterfly shaped zone of return flow. Since casting 5 moves in relation to inductor 9, the movement of the circulating liquid core continuously changes direction and the result is a very effective agitating action on the liquid zone in the core.
  • this continuous change in the direction of flow of the metal can be assisted by alternately energizing and de energizing and/or changing the polarity of the traveling field inductors.
  • Another way to further agitate the liquid core is to continuously or abruptly change the voltage applied to the inductor.
  • a control circuit 18 is provided for permitting this action.
  • an apparatus for the continuous casting of metal of the type having an open ended casting mould for receiving molten 5 metal to be cast and for forming a strand having a solidified shell and a liquid core and means for supporting and cooling the strand after it is withdrawn from said mould so that said metal solidifies from the exterior to the interior to form a solid casting having a substantially rectangular shape
  • the improvement comprising means for generating an electromagnetic field in a cross-section of a portion of said casting which has not completely solidified including a linear traveling field inductor mounted for generating a traveling electromagnetic field in said portion with the direction of field propagation being substantially normal to the path of travel of said casting through said supporting and cooling means and extending across the wider side face of said casting so that the liquid interior of said casting is agitated.
  • the further improvement including means for alternately energizing and de-energizing said traveling field inductor so as to change the pattern of the flow in said liquid interior.
  • the further improvement including means for alternately changing the polarity of said traveling field inductor so as to change the pattern of the flow in said liquid interior.
  • the further improvement including means for varying the voltage on said inductor so as to change the pattern of flow in said liquid interior.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
US62794A 1969-12-12 1970-08-11 Apparatus for producing continuously cast sections with agitation of the liquid core Expired - Lifetime US3656537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691962341 DE1962341B2 (de) 1969-12-12 1969-12-12 Anordnung einer mehrphasigen elektromagnetischen wicklung am strangfuehrungsgeruest einer stranggiessanlage

Publications (1)

Publication Number Publication Date
US3656537A true US3656537A (en) 1972-04-18

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ID=5753676

Family Applications (1)

Application Number Title Priority Date Filing Date
US62794A Expired - Lifetime US3656537A (en) 1969-12-12 1970-08-11 Apparatus for producing continuously cast sections with agitation of the liquid core

Country Status (7)

Country Link
US (1) US3656537A (enrdf_load_stackoverflow)
JP (1) JPS59157757U (enrdf_load_stackoverflow)
CH (1) CH500031A (enrdf_load_stackoverflow)
DE (1) DE1962341B2 (enrdf_load_stackoverflow)
FR (1) FR2068803B1 (enrdf_load_stackoverflow)
GB (1) GB1305414A (enrdf_load_stackoverflow)
SE (1) SE358828C (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746074A (en) * 1971-05-26 1973-07-17 Demag Ag Apparatus for regulating the solidification of the liquid core in a continuous casting
JPS4994522A (enrdf_load_stackoverflow) * 1973-01-16 1974-09-07
US3862659A (en) * 1972-05-29 1975-01-28 Schloemann Ag Method and apparatus for conveying a strand through a continuous casting installation
JPS5019628A (enrdf_load_stackoverflow) * 1973-06-23 1975-03-01
JPS5021935A (enrdf_load_stackoverflow) * 1973-06-28 1975-03-08
JPS5023334A (enrdf_load_stackoverflow) * 1973-07-04 1975-03-13
JPS5028430A (enrdf_load_stackoverflow) * 1973-07-16 1975-03-24
US3882923A (en) * 1972-06-08 1975-05-13 Siderurgie Fse Inst Rech Apparatus for magnetic stirring of continuous castings
US3952791A (en) * 1974-01-08 1976-04-27 Nippon Steel Corporation Method of continuous casting using linear magnetic field for core agitation
JPS5119414B1 (enrdf_load_stackoverflow) * 1971-03-23 1976-06-17
US4030533A (en) * 1974-06-24 1977-06-21 Nippon Steel Corporation Continuous casting system
US4030534A (en) * 1973-04-18 1977-06-21 Nippon Steel Corporation Apparatus for continuous casting using linear magnetic field for core agitation
US4515203A (en) * 1980-04-02 1985-05-07 Kabushiki Kaisha Kobe Seiko Sho Continuous steel casting process
US4562879A (en) * 1982-06-18 1986-01-07 Institut De Recherches De La Siderurgie Francaise Electromagnetically stirring the melt in a continuous-casting mold
US4671335A (en) * 1980-04-02 1987-06-09 Kabushiki Kaisha Kobe Seiko Sho Method for the continuous production of cast steel strands
RU2309814C2 (ru) * 2005-10-04 2007-11-10 Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") Способ литья заготовки и устройство для его осуществления (варианты)
US8944142B2 (en) 2007-08-03 2015-02-03 Helmholtz-Zentrum Dresden-Rossendorf E.V. Method and device for the electromagnetic stirring of electrically conductive fluids
CN106938324A (zh) * 2016-01-05 2017-07-11 鞍钢股份有限公司 一种减少微合金化板坯角部裂纹的装置及方法

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252895Y2 (enrdf_load_stackoverflow) * 1973-04-18 1977-12-01
JPS5419854B2 (enrdf_load_stackoverflow) * 1973-07-04 1979-07-18
SE410153B (sv) * 1976-05-21 1979-10-01 Asea Ab Anleggning vid strenggjutning
DE2743505C3 (de) * 1977-09-23 1984-09-20 Aeg-Elotherm Gmbh, 5630 Remscheid Einrichtung zur Erzeugung eines elektromagnetischen Wanderfeldes innerhalb der Stützrollenbahn einer Brammengießanlage
SE410940C (sv) * 1978-04-05 1986-01-27 Asea Ab Forfaringssett for omroring vid strenggjutning
FR2437900A1 (fr) 1978-10-05 1980-04-30 Siderurgie Fse Inst Rech Procede de coulee continue des metaux avec brassage dans la zone du refroidissement secondaire
CH632431A5 (de) * 1978-10-06 1982-10-15 Concast Ag Verfahren zum stranggiessen von stahl.
CH633464A5 (de) * 1978-12-01 1982-12-15 Concast Ag Strangfuehrungsbahn mit elektromagnetischer ruehreinrichtung in einer stahlstranggiessanlage.
EP0013441A1 (de) * 1979-01-05 1980-07-23 Concast Holding Ag Einrichtung und Verfahren zum elektromagnetischen Rühren in einer Stahlstranggiessanlage
AT362088B (de) * 1979-08-01 1981-04-27 Voest Alpine Ag Ruehreinrichtung an einer stranggiessanlage
SE436251B (sv) * 1980-05-19 1984-11-26 Asea Ab Sett och anordning for omrorning av de icke stelnade partierna av en gjutstreng
EP0045938A1 (de) * 1980-08-11 1982-02-17 Concast Holding Ag Verfahren und Vorrichtung zum Rühren eines Stranges mit rechteckigem Querschnitt in einer Stahlstranggiessanlage
AT378138B (de) * 1983-11-04 1985-06-25 Voest Alpine Ag Ruehreinrichtung an einer stranggiessanlage
DE102007038281B4 (de) 2007-08-03 2009-06-18 Forschungszentrum Dresden - Rossendorf E.V. Verfahren und Einrichtung zum elektromagnetischen Rühren von elektrisch leitenden Flüssigkeiten
DE102010041061B4 (de) 2010-09-20 2013-10-24 Forschungsverbund Berlin E.V. Kristallisationsanlage und Kristallisationsverfahren zur Herstellung eines Blocks aus einem Material, dessen Schmelze elektrisch leitend ist

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752271A (en) * 1954-05-17 1956-07-11 Rossi Irving Improvements in moulds for use in the continuous casting of metals and particularly steel
CA531774A (en) * 1956-10-16 Continuous Metalcast Co. Method for the continuous casting of steel
US2877525A (en) * 1953-08-27 1959-03-17 Schaaber Otto Casting process
GB872591A (en) * 1956-07-18 1961-07-12 British Iron Steel Research Improvements in or relating to the casting of metals
US3153820A (en) * 1961-10-09 1964-10-27 Charles B Criner Apparatus for improving metal structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321327A (en) * 1976-08-12 1978-02-27 Nissan Motor Co Ltd Control device for number of fuel supply cylinder
JPS5340124A (en) * 1976-09-24 1978-04-12 Nissan Motor Co Ltd Fueled-cylinder switching controller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA531774A (en) * 1956-10-16 Continuous Metalcast Co. Method for the continuous casting of steel
US2877525A (en) * 1953-08-27 1959-03-17 Schaaber Otto Casting process
GB752271A (en) * 1954-05-17 1956-07-11 Rossi Irving Improvements in moulds for use in the continuous casting of metals and particularly steel
GB872591A (en) * 1956-07-18 1961-07-12 British Iron Steel Research Improvements in or relating to the casting of metals
US3153820A (en) * 1961-10-09 1964-10-27 Charles B Criner Apparatus for improving metal structure

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5119414B1 (enrdf_load_stackoverflow) * 1971-03-23 1976-06-17
US3746074A (en) * 1971-05-26 1973-07-17 Demag Ag Apparatus for regulating the solidification of the liquid core in a continuous casting
US3862659A (en) * 1972-05-29 1975-01-28 Schloemann Ag Method and apparatus for conveying a strand through a continuous casting installation
US3882923A (en) * 1972-06-08 1975-05-13 Siderurgie Fse Inst Rech Apparatus for magnetic stirring of continuous castings
JPS4994522A (enrdf_load_stackoverflow) * 1973-01-16 1974-09-07
US4030534A (en) * 1973-04-18 1977-06-21 Nippon Steel Corporation Apparatus for continuous casting using linear magnetic field for core agitation
JPS5019628A (enrdf_load_stackoverflow) * 1973-06-23 1975-03-01
JPS5021935A (enrdf_load_stackoverflow) * 1973-06-28 1975-03-08
JPS5023334A (enrdf_load_stackoverflow) * 1973-07-04 1975-03-13
JPS5028430A (enrdf_load_stackoverflow) * 1973-07-16 1975-03-24
US3952791A (en) * 1974-01-08 1976-04-27 Nippon Steel Corporation Method of continuous casting using linear magnetic field for core agitation
US4030533A (en) * 1974-06-24 1977-06-21 Nippon Steel Corporation Continuous casting system
US4515203A (en) * 1980-04-02 1985-05-07 Kabushiki Kaisha Kobe Seiko Sho Continuous steel casting process
US4637453A (en) * 1980-04-02 1987-01-20 Kabushiki Kaisha Kobe Seiko Sho Method for the continuous production of cast steel strands
US4671335A (en) * 1980-04-02 1987-06-09 Kabushiki Kaisha Kobe Seiko Sho Method for the continuous production of cast steel strands
US4562879A (en) * 1982-06-18 1986-01-07 Institut De Recherches De La Siderurgie Francaise Electromagnetically stirring the melt in a continuous-casting mold
AU569037B2 (en) * 1982-06-18 1988-01-21 Institut De Recherches De La Siderurgie Francaise (Irsid) Electromagnetic stirring of continuously cast metal
RU2309814C2 (ru) * 2005-10-04 2007-11-10 Закрытое акционерное общество Научно-производственное предприятие "Машпром" (ЗАО НПП "Машпром") Способ литья заготовки и устройство для его осуществления (варианты)
US8944142B2 (en) 2007-08-03 2015-02-03 Helmholtz-Zentrum Dresden-Rossendorf E.V. Method and device for the electromagnetic stirring of electrically conductive fluids
CN106938324A (zh) * 2016-01-05 2017-07-11 鞍钢股份有限公司 一种减少微合金化板坯角部裂纹的装置及方法
CN106938324B (zh) * 2016-01-05 2019-02-26 鞍钢股份有限公司 一种减少微合金化板坯角部裂纹的装置及方法

Also Published As

Publication number Publication date
DE1962341B2 (de) 1971-06-24
SE358828C (sv) 1983-05-09
DE1962341A1 (enrdf_load_stackoverflow) 1971-06-24
GB1305414A (enrdf_load_stackoverflow) 1973-01-31
FR2068803A1 (enrdf_load_stackoverflow) 1971-09-03
FR2068803B1 (enrdf_load_stackoverflow) 1974-09-20
SE358828B (enrdf_load_stackoverflow) 1973-08-13
CH500031A (de) 1970-12-15
JPS59157757U (ja) 1984-10-23

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