EP0100289A2 - Verfahren zum elektromagnetischen Giessen von Metallen unter Einwirkung mindestens eines von einem eingrenzenden Feld verschiedenen magnetischen Feldes - Google Patents

Verfahren zum elektromagnetischen Giessen von Metallen unter Einwirkung mindestens eines von einem eingrenzenden Feld verschiedenen magnetischen Feldes Download PDF

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Publication number
EP0100289A2
EP0100289A2 EP83420124A EP83420124A EP0100289A2 EP 0100289 A2 EP0100289 A2 EP 0100289A2 EP 83420124 A EP83420124 A EP 83420124A EP 83420124 A EP83420124 A EP 83420124A EP 0100289 A2 EP0100289 A2 EP 0100289A2
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EP
European Patent Office
Prior art keywords
field
metal
frequency
variable
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.)
Granted
Application number
EP83420124A
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English (en)
French (fr)
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EP0100289B1 (de
EP0100289A3 (en
Inventor
Charles Vives
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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Aluminium Pechiney SA
Cegedur Societe de Transformation de lAluminium Pechiney SA
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.)
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Publication date
Application filed by Aluminium Pechiney SA, Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Aluminium Pechiney SA
Priority to AT83420124T priority Critical patent/ATE16771T1/de
Publication of EP0100289A2 publication Critical patent/EP0100289A2/de
Publication of EP0100289A3 publication Critical patent/EP0100289A3/fr
Application granted granted Critical
Publication of EP0100289B1 publication Critical patent/EP0100289B1/de
Expired 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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould

Definitions

  • the present invention relates to an electromagnetic metal casting process in which at least one magnetic field different from the confinement field is made to act.
  • the metal thus confined When the metal thus confined is subjected to cooling by a suitable coolant, it then solidifies according to the shape imposed by the field.
  • ingots are generally obtained having a better surface condition which, in certain cases, can be used directly in dimensional transformation operations without having to resort to particular surface treatments, such as scalping for example.
  • the confinement in confinement of the liquid metal is obtained by application of an electromagnetic field created by means of an annular inductor supplied by an alternating current of frequency generally between 500 and 5000 hertz.
  • the inductor exerts its action on the liquid metal which is brought in by a distributor and which escapes in the form of a column to the lower part of a screen of section substantially close to that of the ingot to be cast and of the same axis.
  • This action results not only in the confining effect, but also in rotational movements of the liquid metal at the periphery of the ingot in a plane passing through its axis and directed from the bottom up when one moves away from this axis.
  • both a stationary field and a variable field of suitable frequency are made to act both to produce radial vibrations within the metal not yet solidified and to limit stirring.
  • This stationary field has a substantially vertical direction and it is created by an annular coil supplied with direct current comprising a number of turns sufficient to reach values less than 0.5 tesla.
  • This coil has a horizontal section close to that of the screen, and it is placed above the latter and concentrically with respect to the axis of the ingot.
  • This field can be modified by adding an annular iron core inside the coil.
  • the invention is not limited to the sole application of a stationary field, but also to that of a variable field of frequency suitable for causing radial vibrations and limiting stirring.
  • This variable field of direction parallel to the axis of the ingot is obtained by means of a coil supplied by an alternating current of low frequency, that is to say between 5 and 100 hertz. It is obvious that, for reasons of convenience, the industrial frequency of 50 Hz is generally chosen.
  • This coil also annular, is placed concentrically inside the coil supplied with direct current and at an average height situated at the limit between the screen and this last coil.
  • variable field created either by the coil or by the screen extends its electromagnetic action to all of the liquid metal, so that the rotational movement of the metal is no longer limited to the vicinity from the periphery of the ingot as with the confinement field, but manifests itself up to the axis of the ingot.
  • the rotation takes place in the opposite direction to that produced by the confinement field: it results from these antagonistic effects, a reduction in the amplitude of the vortices and of the mixing observed in conventional electromagnetic casting. This action, which therefore concerns the entire section of the ingot, results in a refinement of the grain and greater homogeneity of the crystallization.
  • variable field also plays other functions. It gives rise in metal to an induced current whose lines of force are concentric circles. Under the combined action of the stationary field and the induced current, forces of radial direction and of frequency N equal to the frequency of the variable field develop. Similarly, by interaction of the variable field and the induced current, both of frequency N, also arise variable radial forces, but of frequency 2 N. These forced vibrations have the effect of producing a refinement of the grain.
  • variable field from a coil supplied with an alternating current of frequency greater than 100 hertz.
  • the penetration of the electromagnetic field into the. metal will be all the more limited as the frequency is high.
  • the combined action of the stationary field and the induced current is then very reduced and the forced vibrations, practically non-existent.
  • FIG. 1 a section through a vertical plane passing through the axis of the ingot, of an electromagnetic casting device along the prior art, and in Figure 2, the same section of the device according to the invention.
  • an annular coil placed above the screen was supplied with a direct voltage of 24 volts, by a current of 17,500 amp-turns to create a stationary field of 0.04 tesla.
  • Another coil, placed inside the first, at a height close to the top of the screen, was supplied at a voltage of 75 volts, by a current of 3800 ampere-turns, having a period of 50 hertz, for create a variable field.
  • the present invention finds its application in the electromagnetic casting of metals and alloys in the form of plates, billets, ingots, etc. when it is sought to improve both the structure and the surface condition of the cast products.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Dental Prosthetics (AREA)
EP83420124A 1982-07-23 1983-07-19 Verfahren zum elektromagnetischen Giessen von Metallen unter Einwirkung mindestens eines von einem eingrenzenden Feld verschiedenen magnetischen Feldes Expired EP0100289B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83420124T ATE16771T1 (de) 1982-07-23 1983-07-19 Verfahren zum elektromagnetischen giessen von metallen unter einwirkung mindestens eines von einem eingrenzenden feld verschiedenen magnetischen feldes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8213220A FR2530510B1 (fr) 1982-07-23 1982-07-23 Procede de coulee electromagnetique de metaux dans lequel on fait agir au moins un champ magnetique different du champ de confinement
FR8213220 1982-07-23

Publications (3)

Publication Number Publication Date
EP0100289A2 true EP0100289A2 (de) 1984-02-08
EP0100289A3 EP0100289A3 (en) 1984-04-11
EP0100289B1 EP0100289B1 (de) 1985-12-04

Family

ID=9276427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83420124A Expired EP0100289B1 (de) 1982-07-23 1983-07-19 Verfahren zum elektromagnetischen Giessen von Metallen unter Einwirkung mindestens eines von einem eingrenzenden Feld verschiedenen magnetischen Feldes

Country Status (9)

Country Link
US (1) USRE32529E (de)
EP (1) EP0100289B1 (de)
JP (1) JPS5935865A (de)
AT (1) ATE16771T1 (de)
AU (1) AU570210B2 (de)
CA (1) CA1203069A (de)
DE (1) DE3361420D1 (de)
FR (1) FR2530510B1 (de)
SU (1) SU1416050A3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570304A1 (fr) * 1984-09-19 1986-03-21 Cegedur Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale
EP0592360A1 (de) * 1992-10-06 1994-04-13 Alusuisse-Lonza Services Ag Giessmaschine für das vertikale Stranggiessen in einem Magnetfeld
WO2001038022A1 (fr) * 1999-11-25 2001-05-31 Usinor Procede de coulee continue verticale des metaux utilisant des champs electromagnetiques et installation de coulee pour sa mise en oeuvre
CN109311081A (zh) * 2016-05-30 2019-02-05 伊苏瓦尔肯联铝业 通过立式铸造铝合金生产板铸锭的方法

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530510B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee electromagnetique de metaux dans lequel on fait agir au moins un champ magnetique different du champ de confinement
US5246060A (en) * 1991-11-13 1993-09-21 Aluminum Company Of America Process for ingot casting employing a magnetic field for reducing macrosegregation and associated apparatus and ingot
AUPN426095A0 (en) * 1995-07-19 1995-08-10 Bhp Steel (Jla) Pty Limited Method and apparatus for giving vibration to molten metal in twin roll continuous casting machine
US6845809B1 (en) 1999-02-17 2005-01-25 Aemp Corporation Apparatus for and method of producing on-demand semi-solid material for castings
US6796362B2 (en) 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts
US6432160B1 (en) 2000-06-01 2002-08-13 Aemp Corporation Method and apparatus for making a thixotropic metal slurry
US6402367B1 (en) * 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry
US6399017B1 (en) 2000-06-01 2002-06-04 Aemp Corporation Method and apparatus for containing and ejecting a thixotropic metal slurry
US7024342B1 (en) 2000-07-01 2006-04-04 Mercury Marine Thermal flow simulation for casting/molding processes
US6611736B1 (en) 2000-07-01 2003-08-26 Aemp Corporation Equal order method for fluid flow simulation
US7255828B2 (en) * 2002-12-06 2007-08-14 Marcin Stanislaw Kasprzak Electromagnetic method and apparatus for treatment of engineering materials, products, and related processes
JP6234841B2 (ja) * 2014-02-24 2017-11-22 株式会社神戸製鋼所 チタンまたはチタン合金からなる鋳塊の連続鋳造装置
CA3092053C (en) * 2014-05-21 2026-01-06 Novelis Inc. Mixing eductor nozzle and flow control device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1807435A1 (de) * 1968-11-07 1970-10-01 Demag Ag Verfahren und Einrichtung zum Metall-,insbesondere Stahl-Stranggiessen
DE2965366D1 (en) * 1978-07-28 1983-06-16 Concast Holding Ag Method for continuously casting metal in a mould and influence of an electro-magnetic field
DE2914246C2 (de) * 1979-03-07 1981-11-12 Schweizerische Aluminium AG, 3965 Chippis Elektromagnetische Stranggießkokille
US4319625A (en) * 1980-01-14 1982-03-16 Olin Corporation Electromagnetic casting process utilizing an active transformer-driven copper shield
SE436251B (sv) * 1980-05-19 1984-11-26 Asea Ab Sett och anordning for omrorning av de icke stelnade partierna av en gjutstreng
US4373571A (en) * 1980-12-04 1983-02-15 Olin Corporation Apparatus and process for electromagnetically shaping a molten material within a narrow containment zone
FR2530510B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee electromagnetique de metaux dans lequel on fait agir au moins un champ magnetique different du champ de confinement
US4544016A (en) * 1983-04-21 1985-10-01 Yetselev Zinovy N Continuous casting process and apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570304A1 (fr) * 1984-09-19 1986-03-21 Cegedur Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale
WO1986001756A1 (fr) * 1984-09-19 1986-03-27 Cegedur Societe De Transformation De L'aluminium P Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale continue
EP0592360A1 (de) * 1992-10-06 1994-04-13 Alusuisse-Lonza Services Ag Giessmaschine für das vertikale Stranggiessen in einem Magnetfeld
CH688129A5 (de) * 1992-10-06 1997-05-30 Alusuisse Lonza Services Ag Giessmaschine fuer das vertikale Stranggiessen in einem Magnetfeld.
WO2001038022A1 (fr) * 1999-11-25 2001-05-31 Usinor Procede de coulee continue verticale des metaux utilisant des champs electromagnetiques et installation de coulee pour sa mise en oeuvre
FR2801523A1 (fr) * 1999-11-25 2001-06-01 Usinor Procede de coulee continue des metaux du type utilisant des champs electromagnetiques, et lingotiere et installation de coulee pour sa mise en oeuvre
US6619377B1 (en) 1999-11-25 2003-09-16 The Japan Research And Development Center For Metals Method for vertical continuous casting of metals using electromagnetic fields and casting installation therefor
CN109311081A (zh) * 2016-05-30 2019-02-05 伊苏瓦尔肯联铝业 通过立式铸造铝合金生产板铸锭的方法

Also Published As

Publication number Publication date
CA1203069A (fr) 1986-04-15
FR2530510B1 (fr) 1985-07-05
JPS5935865A (ja) 1984-02-27
EP0100289B1 (de) 1985-12-04
AU570210B2 (en) 1988-03-10
SU1416050A3 (ru) 1988-08-07
USRE32529E (en) 1987-10-27
AU1716483A (en) 1984-01-26
ATE16771T1 (de) 1985-12-15
JPH0160337B2 (de) 1989-12-22
FR2530510A1 (fr) 1984-01-27
DE3361420D1 (en) 1986-01-16
EP0100289A3 (en) 1984-04-11

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