EP0178967B1 - Lingotière vibrante de coulée continue des métaux - Google Patents

Lingotière vibrante de coulée continue des métaux Download PDF

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Publication number
EP0178967B1
EP0178967B1 EP85401769A EP85401769A EP0178967B1 EP 0178967 B1 EP0178967 B1 EP 0178967B1 EP 85401769 A EP85401769 A EP 85401769A EP 85401769 A EP85401769 A EP 85401769A EP 0178967 B1 EP0178967 B1 EP 0178967B1
Authority
EP
European Patent Office
Prior art keywords
mold
transducer
mass
wafers
edge
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
EP85401769A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0178967A1 (fr
Inventor
Michel Larrecq
Michel Nogues
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT85401769T priority Critical patent/ATE31259T1/de
Publication of EP0178967A1 publication Critical patent/EP0178967A1/fr
Application granted granted Critical
Publication of EP0178967B1 publication Critical patent/EP0178967B1/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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended 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
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the present invention relates to a vibrating ingot mold for continuous casting of metals according to the preamble of claim 1.
  • An ingot mold having all the characteristics of the preamble of claim 1 is known from document BE-A-886924.
  • the internal tubular element is a piece of copper, or copper alloy, machined from a block or made up of four assembled plates defining a passage for the cast product and which is vigorously cooled, generally by circulation of water, in order to cause a peripheral solidification of the cast metal.
  • the present invention aims to provide a solution to an ultrasonic vibration of a continuous casting mold which overcomes the disadvantages of known solutions.
  • the subject of the invention is a vibrating ingot mold for continuous casting of metals, of the type comprising at least one ultrasonic transducer applied against the internal tubular element of the ingot mold in contact with the cast metal, characterized in that this transducer is mounted on the edge of one end of said tubular element in the extension thereof, and oriented to transmit to said tubular element the ultrasonic vibrations which it generates in a longitudinal direction parallel, or substantially parallel, to the casting axis in the ingot mold.
  • the direction of transmission of vibrations to the wall of the ingot mold is such that the mass of liquid product present in the ingot mold has no damping effect on the vibrations transmitted. It is therefore in no way necessary, as in the previously known method recalled above, to thicken the wall in order to preserve the conditions of resonance in this wall.
  • the ingot mold can therefore without disadvantage be produced in a conventional manner, that is to say have a thin wall cooled by means of a cooling fluid circulating in an annular space surrounding the external face of said wall.
  • the method according to the invention can be applied to existing ingot molds without the latter requiring any particular adaptation.
  • the vibratory efficiency can be optimal, which constitutes another advantage compared to known methods in which the vibrations are transmitted perpendicular to the casting axis.
  • the ultrasonic vibrations used according to the invention will advantageously be power ultrasound, the frequency of which is preferably greater than or equal to 16 kHz and for example between 16 and 60 kHz, to avoid noise pollution. too important.
  • the ultrasonic vibration generator can be of different types. It can for example be constituted by a magnetostrictive transducer. However, piezoelectric transducers whose electrical-mechanical conversion yields can reach 95% are preferred.
  • the plates of piezoelectric material have substantially the same shape as the cross section of the mold.
  • a particularly rigid and compact ingot mold can thus be obtained when said plates have the same dimensions as said section and when the emitting metal mass also has a cross section having the shape and dimensions of the section of the ingot mold.
  • the continuous casting ingot mold represented in the figures is conventionally constituted by a tubular element 14 made of copper or copper alloy defining a passage for the cast product 19 and surrounded at a distance by a jacket 5.
  • the jacket 5 and the element 14 define between them a space for circulation of a cooling fluid (generally water), and connected to the outside by two conduits 6 and 7 respectively of inlet and outlet of the water.
  • the role of this water circulation is to extract, through the wall of the element 14, a flow of heat from the cast metal 19 sufficient to cause the formation of a peripheral solidified crust 18 keeping the core still liquid at the outlet of the ingot mold when the product is extracted in the direction indicated by the arrow carried by the casting axis A.
  • the supply of liquid metal to the ingot mold at its end opposite to that of the extraction of the product n ' has not been shown so as not to overload the figures unnecessarily.
  • the tubular element 14 is formed from four assembled plates 1 to 4 defining the four internal side walls of an ingot mold for the casting of products of rectangular cross section.
  • An ultrasonic vibration transducer 8 is mounted on the edge 20 of the upper end of the tubular element 14.
  • This is a piezoelectric transducer of principle perfectly known per se. It comprises, in the embodiment shown, an upper plate 9 and a lower plate 10, both made of piezoelectric material, for example piezoelectric ceramic such as lead titanozirconate. These two plates are clamped face to face with the interposition of a conductive sheet 11, between a first upper metallic mass 12, called “emitting mass", and a second lower metallic mass, constituted in this case by the internal tubular element 14 himself.
  • the plates 9, 10 and the metal mass 12 extend around the entire periphery of the upper edge 20 of the element 13.
  • These plates 9, 10 have the shape and the dimensions of this edge and the metallic mass 12 has a section whose shape and dimensions correspond to those of element 14, the lateral faces of this mass 12 thus being in the extension of the lateral faces of element 14.
  • the stack formed by the upper metal mass 12, the upper plate 9, the conductive sheet 11, the lower plate 10 and the tubular element 14, is kept assembled by means of clamping rods 13 passing right through the mass.
  • rings 15 isolating the clamping rods 13 from the plates 9, 10 and the conductive sheet 11 and by electrical contacts 16, 17 secured respectively to the conductive sheet 11 and to the upper metallic mass 12 and connected to an alternating current source (not shown).
  • the dimensions of the upper metallic mass 12 and of this element 14 are chosen so that the distance D separating the upper end from the metallic mass 12 of the lower end of the element 14 is equal to an integer number of times the half wavelength of the vibrations emitted by the transducer 8.
  • the height of the metallic mass 12 is also chosen so that the distance D 'separating the upper end of this mass 12 from the median plane of the sheet 11 is equal to ⁇ / 4 (modulo ⁇ / 2), ⁇ being the length waveform of the vibrations emitted by the transducer 8.
  • the vibrations emitted by the transducer 8 are transmitted vertically to said element, that is to say in the direction of the casting axis symbolized at A in FIG. 2, these vibrations then propagating vertically within this wall which then vibrates in the longitudinal direction of the mold.
  • This vibration produces a reduction in the friction forces at the interface of the copper element 14 and the solidified crust 18 surrounding the still liquid core 19 of the cast metal, which has the effect of very significantly reducing the risks of attachment or bonding of said crust to the internal surface of element 14.
  • the invention can advantageously be combined with the usual practice of lubrication by oil or by covering powder, as well as with the usual practice of putting the whole ingot mold into longitudinal mechanical oscillation.
  • the invention applies not only to an ingot mold with assembled plates, as considered in the previous example, and generally used for casting slabs or large blooms, but also to ingot molds provided with an element machined monolithic internal tubular, generally used for casting billets or blooms, round, square, rectangular or other.
  • the transducer comprises two ceramic plates, but the present invention can also be implemented with a stack of more than two superimposed ceramic plates, for example 4, 6, 8, ... (always in even number); this allows, if desired, to increase the power of the ultrasonic wave.
  • the ceramic constituting the transducer plates is not limited to lead titanozirconate, but other materials may be suitable for the desired use, insofar as they have good mechanical resistance ensuring them a satisfactory resistance to high electric fields.
  • the invention accommodates perfectly with stirring of the liquid metal in an ingot mold, for example using a magnetic field rotating around the casting axis, or sliding parallel or perpendicular to this axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Mold Materials And Core Materials (AREA)
EP85401769A 1984-09-26 1985-09-12 Lingotière vibrante de coulée continue des métaux Expired EP0178967B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401769T ATE31259T1 (de) 1984-09-26 1985-09-12 Vibrierende giessform zum stranggiessen von metallen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8414759A FR2570626B1 (fr) 1984-09-26 1984-09-26 Procede pour mettre en vibration une lingotiere de coulee continue afin de reduire le coefficient de frottement dans cette lingotiere et lingotiere pour la mise en oeuvre de ce procede
FR8414759 1984-09-26

Publications (2)

Publication Number Publication Date
EP0178967A1 EP0178967A1 (fr) 1986-04-23
EP0178967B1 true EP0178967B1 (fr) 1987-12-09

Family

ID=9308086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401769A Expired EP0178967B1 (fr) 1984-09-26 1985-09-12 Lingotière vibrante de coulée continue des métaux

Country Status (8)

Country Link
US (1) US4662427A (ja)
EP (1) EP0178967B1 (ja)
JP (1) JPS6182951A (ja)
KR (1) KR920002105B1 (ja)
AT (1) ATE31259T1 (ja)
CA (1) CA1246318A (ja)
DE (1) DE3561132D1 (ja)
FR (1) FR2570626B1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640173B3 (fr) * 1988-12-08 1990-12-07 Siderurgie Fse Inst Rech Dispositif pour mettre en vibration par ultrasons une lingotiere de coulee continue
IT1288989B1 (it) * 1996-09-25 1998-09-25 Danieli Off Mecc Procedimento per l'ottenimento di vibrazioni delle pareti del cristallizzatore di una lingottiera mediante attuatori e
DE19823361A1 (de) * 1998-05-15 1999-11-25 Mannesmann Ag Verfahren und Vorrichtung zum Abziehen eines Metallstranges
KR100677835B1 (ko) * 1999-11-01 2007-02-05 미쓰이 가가쿠 가부시키가이샤 올레핀계 열가소성 엘라스토머 적층체 및 건축용 개스킷
US20040177942A1 (en) * 2001-01-12 2004-09-16 Mason Douglas P. Method and apparatus for vibration casting of vehicle wheels
US6523601B1 (en) 2001-08-31 2003-02-25 Shlomo Hury Method and apparatus for improving internal quality of continuously cast steel sections
US8545645B2 (en) * 2003-12-02 2013-10-01 Franklin Leroy Stebbing Stress free steel and rapid production of same
WO2008043173A1 (en) * 2006-10-13 2008-04-17 Magna International Inc. Metal forming with vibration assist
EP2257390B1 (en) 2008-03-05 2012-01-04 Southwire Company Ultrasound probe with protective niobium layer
US8652397B2 (en) 2010-04-09 2014-02-18 Southwire Company Ultrasonic device with integrated gas delivery system
EP2556176B1 (en) 2010-04-09 2020-03-11 Southwire Company, LLC Ultrasonic degassing of molten metals
DE102011083016A1 (de) * 2011-09-20 2013-03-21 Sms Siemag Ag Vorrichtung zum Stranggießen und Verwendung von piezoelektrischen Aktuatoren
US9528167B2 (en) 2013-11-18 2016-12-27 Southwire Company, Llc Ultrasonic probes with gas outlets for degassing of molten metals
EP2905093B1 (de) * 2014-02-07 2018-08-29 SMS Concast AG Kokillenanordnung zum Stranggiessen von metallischen Produkten
CN107848024B (zh) 2015-02-09 2021-02-09 汉斯科技有限责任公司 超声晶粒细化
US10233515B1 (en) 2015-08-14 2019-03-19 Southwire Company, Llc Metal treatment station for use with ultrasonic degassing system
US10639707B2 (en) 2015-09-10 2020-05-05 Southwire Company, Llc Ultrasonic grain refining and degassing procedures and systems for metal casting

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU899239A1 (ru) * 1978-09-22 1982-01-23 Предприятие П/Я А-1977 Способ непрерывной разливки алюмини
JPS602143B2 (ja) * 1979-07-06 1985-01-19 新日本製鐵株式会社 金属の連続鋳造方法
JPS5611137A (en) * 1979-07-06 1981-02-04 Nippon Steel Corp Combined mold for continuous casting of metal
JPS5611149A (en) * 1979-07-06 1981-02-04 Nippon Steel Corp Mold for continuous casting of metal
JPS5934465B2 (ja) * 1979-07-06 1984-08-22 新日本製鐵株式会社 金属の連続鋳造用鋳型
JPS5611154A (en) * 1979-07-09 1981-02-04 Nippon Steel Corp Mold for continuous casting of metal
JPS5689359A (en) * 1979-12-21 1981-07-20 Nippon Kokan Kk <Nkk> Vibrating device of mold for continuous casting
GB2108878A (en) * 1981-11-06 1983-05-25 British Steel Corp Vibration of a continuous casting machine mould

Also Published As

Publication number Publication date
DE3561132D1 (en) 1988-01-21
CA1246318A (fr) 1988-12-13
KR920002105B1 (ko) 1992-03-12
US4662427A (en) 1987-05-05
KR860002321A (ko) 1986-04-24
FR2570626B1 (fr) 1987-05-07
JPS6182951A (ja) 1986-04-26
EP0178967A1 (fr) 1986-04-23
ATE31259T1 (de) 1987-12-15
JPH0371937B2 (ja) 1991-11-15
FR2570626A1 (fr) 1986-03-28

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