EP0133179A1 - Procédé pour la coulée continue de métaux sous contrôle de l'état de la peau solidifiée du lingot coulé - Google Patents

Procédé pour la coulée continue de métaux sous contrôle de l'état de la peau solidifiée du lingot coulé Download PDF

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Publication number
EP0133179A1
EP0133179A1 EP84890129A EP84890129A EP0133179A1 EP 0133179 A1 EP0133179 A1 EP 0133179A1 EP 84890129 A EP84890129 A EP 84890129A EP 84890129 A EP84890129 A EP 84890129A EP 0133179 A1 EP0133179 A1 EP 0133179A1
Authority
EP
European Patent Office
Prior art keywords
continuous casting
casting mold
magnetic field
shell
side wall
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
EP84890129A
Other languages
German (de)
English (en)
Other versions
EP0133179B1 (fr
Inventor
Reinhold Dr. Angerer
Hans Weberberger
Herbert Dipl.-Ing. Bumberger
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.)
Voestalpine AG
Original Assignee
Voestalpine 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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0133179A1 publication Critical patent/EP0133179A1/fr
Application granted granted Critical
Publication of EP0133179B1 publication Critical patent/EP0133179B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/207—Controlling or regulating processes or operations for removing cast stock responsive to thickness of solidified shell

Definitions

  • the invention relates to a process for the continuous casting of metals under control of the surface properties of the continuous shell of a continuously cast strand within a continuous casting mold, the continuous casting mold and the strand performing a periodically discontinuous relative movement, and an apparatus for carrying out the method.
  • a force measuring device for measuring the forces transmitted from the mold to the support is attached to a support of the mold and further an accelerometer is provided, the accelerometer and the force measuring devices being connected by an electrical subtraction circuit (AT-PS 366 607).
  • This known device requires a special design of the mold support. The measurement results require a special evaluation, since the frictional forces between the strand shell and the mold depend on a variety of factors, e.g. the temperature of the melt, the material-dependent solidification properties, the contact of the strand shell with the mold side walls and the contact pressure of the strand shell with the mold side walls .
  • the invention has for its object to reliably and immediately indicate a sticking of the strand shell with simple equipment, so that necessary countermeasures can be taken while the crack of the strand shell is within the mold.
  • This object is achieved in that eddy currents are induced in the continuous shell by means of a first magnetic field generated in a side wall of the continuous casting mold and that a second magnetic field generated by these eddy currents in the side wall of the continuous casting mold is measured and compared with a limit value, the second being expedient Magnetic field is measured indirectly by measuring a voltage induced in a measuring coil arranged in the side wall of the continuous casting mold by the second magnetic field.
  • a static magnetic field is generated as the first magnetic field.
  • a device for carrying out the method with a continuous casting mold having side walls is characterized in that a magnet, preferably a horseshoe magnet, and at least one measuring coil are provided in at least one side wall of the continuous casting mold.
  • the magnet and the measuring coil are advantageously arranged in the mold-side half of the side walls.
  • a preferred embodiment for a continuous casting mold with a slab cross-sectional format is characterized in that a plurality of magnets and measuring coils are arranged next to one another on the broad side walls of the continuous casting mold.
  • the magnet and the measuring coil are expediently arranged on the rear side of the copper side walls touching the strand shell and covered by the supporting walls supporting the copper side walls.
  • Fig. 1 shows a partial cross section through a schematically illustrated continuous casting mold
  • Fig. 2 shows a view in the direction of arrow II of Fig. 1.
  • the copper broad side wall of a vertical continuous casting mold with a slab cross-sectional format oscillating in the direction of the double arrow 1 is designated by 2.
  • the hot strand 3 located in the mold has a thin strand shell 4 lying against the broad side wall 2.
  • the metal melt located within the strand shell 4 is designated by 5.
  • a recess 6 is incorporated into which a horseshoe magnet 7, the conclusion of which is designated 8, is inserted.
  • a measuring tube 9 is also arranged, which is connected to a voltage measuring device, not shown.
  • the recess 6 is located between the water channels 10 of the copper broad side wall 2.
  • second magnetic field which induces a voltage in the measuring coil 9. Since the second magnetic field fluctuates with the oscillation frequency, which is approximately between 1 and 2 Hz, it is weakened by the copper broad side wall, but the weakening is acceptable.
  • the upper, torn-off part of the strand shell 4 also oscillates with the continuous casting mold, ie it no longer performs a relative movement with respect to the copper broad side wall.
  • the measuring coil 9 registers no voltage, as a result of which the crack 13 can be seen.
  • the metal melt does not interfere with the measuring process of the second magnetic field, since the repercussions of the magnetic field, which is generated by eddy currents in the melt 5, are extremely low due to the greater distance of the melt 5 from the measuring coil 9.
  • the method according to the invention can also be used for horizontal continuous casting plants in which the continuous casting mold is arranged in a stationary manner and the strand oscillates.
  • a bar magnet can also be used, the axis of which is oriented at right angles to the side wall of the mold, one or more measuring coils being arranged next to the magnet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP19840890129 1983-07-21 1984-07-12 Procédé pour la coulée continue de métaux sous contrôle de l'état de la peau solidifiée du lingot coulé Expired EP0133179B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT266883A AT377935B (de) 1983-07-21 1983-07-21 Verfahren zur kontrolle der oberflaechenbeschaffenheit der strangschale eines kontinuierlich gegossenen metallstranges
AT2668/83 1983-07-21

Publications (2)

Publication Number Publication Date
EP0133179A1 true EP0133179A1 (fr) 1985-02-13
EP0133179B1 EP0133179B1 (fr) 1987-09-09

Family

ID=3538386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840890129 Expired EP0133179B1 (fr) 1983-07-21 1984-07-12 Procédé pour la coulée continue de métaux sous contrôle de l'état de la peau solidifiée du lingot coulé

Country Status (4)

Country Link
EP (1) EP0133179B1 (fr)
JP (1) JPS6040656A (fr)
AT (1) AT377935B (fr)
DE (1) DE3465909D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103893A (en) * 1989-09-19 1992-04-14 Nippon Steel Corporation Method and apparatus for detecting level of molten metal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125146C2 (de) * 1991-07-30 1996-12-05 Eko Stahl Gmbh Verfahren zur Erhöhung der Gießsicherheit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652433A1 (de) * 1975-11-20 1977-06-08 Mitsubishi Heavy Ind Ltd Vorrichtung zur bestimmung des metallschmelzenspiegels in einer giessform oder kokille
LU74656A1 (fr) * 1976-03-26 1977-10-10
FR2352611A1 (fr) * 1976-05-28 1977-12-23 Siderurgie Fse Inst Rech Procede et dispositif de detection de puits liquide dans les produits metalliques coules en continu
EP0060800A1 (fr) * 1981-03-18 1982-09-22 Arbed S.A. Procédé et dispositif pour mesurer le niveau de métal fondu dans des moules en continu

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5927270B2 (ja) * 1976-03-31 1984-07-04 三菱重工業株式会社 連続鋳造鋳型内の湯面検出装置
CH624323A5 (fr) * 1977-09-19 1981-07-31 Atomenergi Ab

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2652433A1 (de) * 1975-11-20 1977-06-08 Mitsubishi Heavy Ind Ltd Vorrichtung zur bestimmung des metallschmelzenspiegels in einer giessform oder kokille
LU74656A1 (fr) * 1976-03-26 1977-10-10
FR2352611A1 (fr) * 1976-05-28 1977-12-23 Siderurgie Fse Inst Rech Procede et dispositif de detection de puits liquide dans les produits metalliques coules en continu
EP0060800A1 (fr) * 1981-03-18 1982-09-22 Arbed S.A. Procédé et dispositif pour mesurer le niveau de métal fondu dans des moules en continu

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 8, Nr. 22(M-272)(1459), 31. Januar 1984; & JP - A - 58 181458 (MITSUBISHI JUKOGYO K.K.) 24.10.1983 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103893A (en) * 1989-09-19 1992-04-14 Nippon Steel Corporation Method and apparatus for detecting level of molten metal

Also Published As

Publication number Publication date
ATA266883A (de) 1984-10-15
EP0133179B1 (fr) 1987-09-09
DE3465909D1 (en) 1987-10-15
JPS6040656A (ja) 1985-03-04
AT377935B (de) 1985-05-28

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