EP0502802A1 - Procédé et dispositif de coulée continue de fil métallique de faible diamètre directement à partir de métal liquide - Google Patents

Procédé et dispositif de coulée continue de fil métallique de faible diamètre directement à partir de métal liquide Download PDF

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Publication number
EP0502802A1
EP0502802A1 EP92470007A EP92470007A EP0502802A1 EP 0502802 A1 EP0502802 A1 EP 0502802A1 EP 92470007 A EP92470007 A EP 92470007A EP 92470007 A EP92470007 A EP 92470007A EP 0502802 A1 EP0502802 A1 EP 0502802A1
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EP
European Patent Office
Prior art keywords
nozzle
metal
liquid
jet
wire
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.)
Withdrawn
Application number
EP92470007A
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German (de)
English (en)
French (fr)
Inventor
Didier Huin
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.)
Unimetal SA
Original Assignee
Unimetal 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.)
Filing date
Publication date
Application filed by Unimetal SA filed Critical Unimetal SA
Publication of EP0502802A1 publication Critical patent/EP0502802A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire

Definitions

  • the invention relates to the manufacture of small diameter metal wires by quenching a jet of liquid metal in a layer of cooling liquid.
  • This metal jet then enters a layer of cooling liquid, such as water or an aqueous solution of a salt, which solidifies the jet into a metal wire.
  • This layer of liquid is in movement in a direction transverse to that of the metal jet and flows on a solid surface itself in movement which entrains the liquid, and can be constituted by the interior of a drum rotating around a horizontal axis (European Patent EP 39169 already cited) or by a horizontal or concave portion of a grooved belt running in a loop (European Patent EP 89134).
  • the wire is entrained in the cooling liquid, which preferably moves laminarly at a speed substantially equal to or slightly greater than the speed of ejection of the jet of liquid metal from the tank (of the order of 5 to 15 m / s). As it is poured, the wire is wound in the drum under the effect of centrifugal force, or is continuously removed from the cooling medium by suitable means to be picked up and possibly wound outside the casting machine.
  • this process makes it possible, if the metal is amorphizable, to obtain amorphous wires of uniform size having, among other properties, a very high tensile strength.
  • a variant of this process presented in Japanese Patent Application JP 60250859, consists in placing the cooling liquid in a fixed tank, in placing the liquid metal tank above this tank, in orienting the outlet nozzle of the jet of liquid metal so that the latter enters the cooling liquid at an angle less than or equal to 30 ° relative to its surface, and to impart to the reservoir a rotational movement around a vertical axis not passing through the nozzle output.
  • the solidified wire is deposited at the bottom of the tank in the form of superimposed turns.
  • the object of the invention is to propose a method of casting wire allowing continuous collection of the wire and not limiting the quantity of metal which it is possible to treat at one time to too small a value, as well as a device of simple design for its implementation.
  • the subject of the invention is a process for the continuous casting of fine metallic wire in which a jet of liquid metal leaving the nozzle of a reservoir is quenched and solidified in a layer of cooling liquid, characterized in that said fluid flows over a cylindrical or slightly frustoconical fixed surface with a substantially vertical axis, in that the tank imparts a rotational movement around the axis of said surface so as to move the end of the nozzle on a circular path concentric with said surface, and in that the metal jet is ejected from the nozzle in a direction making a right or obtuse angle with the tangent of the circular path.
  • the invention also relates to a device for continuously casting fine metallic wire comprising a reservoir containing a liquid metal provided with a nozzle, through which a jet of said liquid metal flows, oriented in the direction of a layer of cooling liquid.
  • said jet is quenched and solidified in the form of a wire, characterized in that it comprises a fixed cylindrical or slightly frustoconical surface of substantially vertical axis on which flows said layer of coolant, means for printing a rotational movement around the axis of said surface, and means for collecting said wire as it is formed, placed below said surface.
  • the invention consists in solidifying the jet of liquid metal in a film of coolant freely flowing over a cylindrical or slightly frustoconical surface.
  • the wire thus solidified progressively descends along this surface in the form of turns, and, below the surface, is gripped by a device making it possible to evacuate it.
  • the cooling medium in which the quenching and solidification of the liquid metal M takes place consists of a layer of liquid 1 trickling at a speed v on the upper surface 2 flat and horizontal of a fixed support 3.
  • This support has any general shape, for example cylindrical as shown. Its essential characteristic is to have, in its central part, a recess 4 passing right through it, and produced in such a way that the surface 5 of the support 3 delimiting this recess is cylindrical, with a vertical XY axis.
  • the liquid 1 flows from the upper surface 2 of the support to the cylindrical surface 5 and thus forms a layer of thickness e flowing at a speed v ′.
  • the junction between the upper surface 2 of the support and the cylindrical surface 5 of the recess is preferably carried out without a sharp angle, in order to minimize the disturbances caused to the flow of the liquid 1 by the slope break.
  • the liquid 1 is brought to the support 3 by means such as a hollow ferrule 6 connected to a liquid supply, not shown.
  • This ferrule has an orifice 7 through which the liquid flows.
  • This orifice describes a circle substantially concentric with the recess 4. Its dimensions and the flow rate of the liquid are calculated so as to form a layer of liquid 1 of regular thickness e of the order of 1 cm, and with a flow at relatively low speed v ′ in the recess 4 to prevent excessive turbulence from being established inside the layer 1.
  • the cooling liquid is set in motion, while the tank is fixed, but the speed Vf of the jet of liquid metal, which is also the speed of the solidified wire, is made, and the speed Vl of the liquid are equal, or that Vl is slightly greater than Vf, in a ratio not exceeding 1.3 to 1.5. If Vf is greater than Vl, the jet and the wire are not entrained by the liquid, and there is an accumulation effect which results in an irregular thickness of the wire. If, on the contrary Vl is much greater than Vf the effect of driving the jet is too great and leads to its periodic break, which makes it impossible to obtain a continuous wire of great length.
  • the speed ratio to be taken into account for the adjustment of the installation is therefore the ratio between the speed of the metal jet 15 and the wire 14, and the linear speed Vb of the end of the nozzle 12, equal to ⁇ R if R is the distance between the end of the nozzle 12 and the axis XY of rotation of the reservoir 8.
  • These speeds are, for example, of the order of 5 to 15 m / s, as in conventional installations, and must be sufficient to guarantee a high solidification speed, especially if the formation of an amorphous wire is sought.
  • Their report Vb Vf is also within the limits of 1 to 1.5.
  • the direction of penetration of the jet 15 into the cooling liquid 1 must also be optimized, as in conventional installations, where the inclination of the jet relative to the surface of the liquid is very variable. In this optimization, it may be necessary to take account of the rate of fall v ′ of the layer of cooling liquid 1.
  • any liquid known for its cooling capacities can be used, for example water, aqueous saline solutions, or liquefied gases.
  • the solidified wire 14 Under the effect of the centrifugal force and the direction initially imposed on the metal jet 15, the solidified wire 14 is pressed against the cylindrical surface 5. Under the effect of its weight and the thrust exerted on it by the descending layer of cooling liquid 1, the wire gradually descends along the surface 5 and thus forms turns. Below the support 3, these turns fall on each other and are deposited on a conveyor belt 16 moved by means smbolized by a pulley 17 and which evacuates the turns of wire as and when they are formed.
  • the installation may also include means (not shown) for collecting the used cooling fluid and for returning this liquid to the supply circuit of the installation.
  • an advantage of the invention is to cause the metal M to be centrifuged inside the reservoir. This centrifugation accentuates the separation between the metal and the non-metallic inclusions which it inevitably contains, and which ultimately rises to the surface of the metal M to form a layer of slag 18. This thus increases the quality of the wire, while by reducing the risks of clogging of the nozzle 12 by inclusions.
  • Another advantage of this installation is that the metal tank 8 is not limited in size in the height direction. It is therefore possible to treat at once a quantity of metal as large as desired, provided that means for driving the tank in rotation with a suitable power.
  • the solidified wire leaves the solidification zone on its own in the form of turns, and its evacuation and winding do not require complex installation.
  • a conveyor belt instead of a conveyor belt, it is possible to provide a gradually descending plate, or any other means making it possible to capture the end of the wire and to wind it on a mandrel.
  • the surface 5 of the recess may not be strictly cylindrical, but slightly frustoconical.
  • Such a shape allows better guidance and better formation of the turns, and makes it possible to reduce the speed v ′ of the layer of liquid 1, for a speed v equal to the outlet of the shell. This brings us closer to the conditions of solidification of the wire in conventional type installations.
  • the distance between the nozzle 12 and the surface of the liquid layer 1 can be adjusted by simple vertical translation of the reservoir 8.
  • the taper of the surface 5 should not, however, be so great as to hinder the descent of the turns of wire which could find themselves blocked inside the recess, which would make it necessary to interrupt the casting.
  • provision can be made for continuously supplying the reservoir 8 with metal, either with already liquid metal, or with solid metal divided sufficiently finely for its complete melting to take place before it reaches the nozzle 12. can thus further reduce the limit on the quantity of wire that can be poured in a single operation. It is also possible to equip the reservoir 8 with several neighboring nozzles for casting multi-stranded wires, in a similar manner to that which is explained in the document JP 63273554. It is finally possible, in a known manner, to move the end of the nozzle 12 away from the liquid layer 1 more than a few mm, if it is possible to artificially maintain the coherence of the metal jet 15. This can be done by creating on the surface of the jet, in known manner, an oxide film, thanks to the limited oxidation of one of the metal components by air or by a suitable oxidizing atmosphere, as described for example in document EP 360104.
  • the invention applies to the casting of metallic wires of small diameter, for example steel, and makes it possible to obtain wires of amorphous structure if the solidification conditions are sufficiently violent and if the composition of the cast metal lends itself to it. .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP92470007A 1991-03-05 1992-02-20 Procédé et dispositif de coulée continue de fil métallique de faible diamètre directement à partir de métal liquide Withdrawn EP0502802A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102781A FR2673551B1 (fr) 1991-03-05 1991-03-05 Procede et dispositif de coulee continue de fil metallique de faible diametre directement a partir de metal liquide.
FR9102781 1991-03-05

Publications (1)

Publication Number Publication Date
EP0502802A1 true EP0502802A1 (fr) 1992-09-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92470007A Withdrawn EP0502802A1 (fr) 1991-03-05 1992-02-20 Procédé et dispositif de coulée continue de fil métallique de faible diamètre directement à partir de métal liquide

Country Status (4)

Country Link
EP (1) EP0502802A1 (tr)
CA (1) CA2062276A1 (tr)
FR (1) FR2673551B1 (tr)
TR (1) TR25618A (tr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113840471A (zh) * 2020-06-23 2021-12-24 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) 一种制备柔性电子的方法及柔性电子

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039169A2 (en) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphous metal filaments and process for producing the same
EP0227837A1 (en) * 1985-06-26 1987-07-08 Sumitomo Electric Industries, Ltd. Method and apparatus for taking up elongated material
EP0360104A1 (fr) * 1988-09-21 1990-03-28 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Procédés et dispositifs pour obtenir des fils en alliages métalliques amorphes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60250859A (ja) * 1984-05-25 1985-12-11 Sumitomo Electric Ind Ltd 金属細線の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039169A2 (en) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Amorphous metal filaments and process for producing the same
EP0227837A1 (en) * 1985-06-26 1987-07-08 Sumitomo Electric Industries, Ltd. Method and apparatus for taking up elongated material
EP0360104A1 (fr) * 1988-09-21 1990-03-28 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Procédés et dispositifs pour obtenir des fils en alliages métalliques amorphes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 122 (M-476)(2179) 7 Mai 1986 & JP-A-60 250 859 ( SUMITOMO DENKI KOGYO K.K. ) 11 Décembre 1985 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113840471A (zh) * 2020-06-23 2021-12-24 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) 一种制备柔性电子的方法及柔性电子
CN113840471B (zh) * 2020-06-23 2023-05-09 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) 一种制备柔性电子的方法及柔性电子

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Publication number Publication date
CA2062276A1 (fr) 1992-09-06
FR2673551A1 (fr) 1992-09-11
FR2673551B1 (fr) 1993-06-11
TR25618A (tr) 1993-07-01

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