EP0100289B1 - Procédé de coulée électromagnétique de métaux dans lequel on fait agir au moins un champ magnétique différent du champ de confinement - Google Patents

Procédé de coulée électromagnétique de métaux dans lequel on fait agir au moins un champ magnétique différent du champ de confinement Download PDF

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Publication number
EP0100289B1
EP0100289B1 EP83420124A EP83420124A EP0100289B1 EP 0100289 B1 EP0100289 B1 EP 0100289B1 EP 83420124 A EP83420124 A EP 83420124A EP 83420124 A EP83420124 A EP 83420124A EP 0100289 B1 EP0100289 B1 EP 0100289B1
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EP
European Patent Office
Prior art keywords
field
casting
liquid metal
frequency
metals
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
Application number
EP83420124A
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German (de)
English (en)
French (fr)
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EP0100289A3 (en
EP0100289A2 (fr
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
Cegedur Societe de Transformation de lAluminium Pechiney SA
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Publication date
Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT83420124T priority Critical patent/ATE16771T1/de
Publication of EP0100289A2 publication Critical patent/EP0100289A2/fr
Publication of EP0100289A3 publication Critical patent/EP0100289A3/fr
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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 a metal casting process.
  • 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.
  • EP-A-0 015 870 also teaches a method of confining liquid metal by means of an electromagnetic 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.
  • DE-A-1 807 435 discloses a process in which a stationary field and a rotating variable field are used simultaneously to limit stirring within the metal.
  • EP-A-0 040 383 teaches a process for agitating the non-solidified portion in a continuous casting in which a static magnetic field and possibly an alternating magnetic field is produced which is produced by an agitator supplied with polyphase alternating current. It can be noted that these stirrers are arranged on a limited portion of the wall of the mold and exert their field perpendicular to the casting jet entering the bath.
  • the Applicant aware of the advantages which electromagnetic casting without a mold provides, has sought to eliminate the excessive stirring which it entails by causing, during casting, to act in addition to the confinement field a combination of stationary and variable magnetic fields.
  • 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.
  • an electromagnetic confinement field created by an inductor is acted on the one hand on the liquid metal, on the other hand, a stationary magnetic field created by a magnetic field above the liquid metal level.
  • the 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 lower 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.
  • 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. It is possible to remove this coil by directly supplying the screen with alternating current and which then becomes a variable field generator, and this replacement makes it easier to introduce an iron core into the coil supplied with direct current.
  • 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 manifest 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 stirring observed in conventional electromagnetic casting. This action, which therefore concerns the entire section of the ingot, results in a refining 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. Likewise, by the 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 the higher the frequency.
  • 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 8 placed inside the first, at a height close to the top of the screen 4 was supplied at a voltage of 75 volts, by a current of 3800 ampere-turns, having a period of 50 hertz , to 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)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Soft Magnetic Materials (AREA)
  • Dental Prosthetics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
EP83420124A 1982-07-23 1983-07-19 Procédé de coulée électromagnétique de métaux dans lequel on fait agir au moins un champ magnétique différent du champ de confinement Expired EP0100289B1 (fr)

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 EP0100289A2 (fr) 1984-02-08
EP0100289A3 EP0100289A3 (en) 1984-04-11
EP0100289B1 true EP0100289B1 (fr) 1985-12-04

Family

ID=9276427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83420124A Expired EP0100289B1 (fr) 1982-07-23 1983-07-19 Procédé de coulée électromagnétique de métaux dans lequel on fait agir au moins un champ magnétique différent du champ de confinement

Country Status (9)

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

Families Citing this family (17)

* 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
FR2570304B1 (fr) * 1984-09-19 1986-11-14 Cegedur Procede de reglage du niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale
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
CH688129A5 (de) * 1992-10-06 1997-05-30 Alusuisse Lonza Services Ag Giessmaschine fuer das vertikale Stranggiessen in einem Magnetfeld.
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
FR2801523B1 (fr) 1999-11-25 2001-12-28 Usinor Procede de coulee continue des metaux du type utilisant des champs electromagnetiques, et lingotiere et installation de coulee pour sa mise en oeuvre
US6432160B1 (en) * 2000-06-01 2002-08-13 Aemp Corporation Method and apparatus for making 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
US6402367B1 (en) 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry
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
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
CN107073573B (zh) * 2014-05-21 2020-05-05 诺维尔里斯公司 非接触式熔融金属流动控制
FR3051698B1 (fr) * 2016-05-30 2020-12-25 Constellium Issoire Procede de fabrication de lingots de laminage par coulee verticale d'un alliage d'aluminium

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
FI63682C (fi) * 1978-07-28 1983-08-10 Concast Ag Foerfarande foer gjutning av en metallstaong
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

Also Published As

Publication number Publication date
SU1416050A3 (ru) 1988-08-07
ATE16771T1 (de) 1985-12-15
JPH0160337B2 (enrdf_load_stackoverflow) 1989-12-22
USRE32529E (en) 1987-10-27
AU1716483A (en) 1984-01-26
FR2530510A1 (fr) 1984-01-27
EP0100289A3 (en) 1984-04-11
CA1203069A (fr) 1986-04-15
FR2530510B1 (fr) 1985-07-05
JPS5935865A (ja) 1984-02-27
EP0100289A2 (fr) 1984-02-08
AU570210B2 (en) 1988-03-10
DE3361420D1 (en) 1986-01-16

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