EP0378036B1 - Procédé et dispositif de coulée continue de fil métallique fin - Google Patents

Procédé et dispositif de coulée continue de fil métallique fin Download PDF

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Publication number
EP0378036B1
EP0378036B1 EP89470027A EP89470027A EP0378036B1 EP 0378036 B1 EP0378036 B1 EP 0378036B1 EP 89470027 A EP89470027 A EP 89470027A EP 89470027 A EP89470027 A EP 89470027A EP 0378036 B1 EP0378036 B1 EP 0378036B1
Authority
EP
European Patent Office
Prior art keywords
liquid
metal
cooling liquid
jet
layer
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 - Lifetime
Application number
EP89470027A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0378036A1 (fr
Inventor
Didier Huin
Paul-Victor Riboud
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
Priority to AT89470027T priority Critical patent/ATE87517T1/de
Publication of EP0378036A1 publication Critical patent/EP0378036A1/fr
Application granted granted Critical
Publication of EP0378036B1 publication Critical patent/EP0378036B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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 present invention relates to the field of direct casting of thin wires from liquid metal.
  • the wire as it is poured, is wound inside the drum under the effect of centrifugal force, or 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.
  • We can thus cast amorphous wires in alloys based on various metals such as iron, copper, cobalt, gold, aluminum, etc.
  • one of the conditions necessary for obtaining a continuous wire of regular diameter is that the flow rate of the cooling liquid, upon contact with the metal jet, is as close as possible to flow laminar. Otherwise, the metal jet may be split before it solidifies. We would thus obtain not a continuous thread, but fibers of short length. Consequently, the introduction of the metal jet into the liquid must be carried out at a point sufficiently distant from the outlet of the supply line so that before this point, the turbulence of the liquid has had time to dissipate for a very large share.
  • the object of the present invention is to provide a method of accelerating the dissipation of the turbulence of the cooling liquid. It makes it possible to build installations of reduced dimensions which can massively and reliably produce good quality amorphous wires.
  • the subject of the invention is a process for the continuous casting of a thin metal wire in which a jet of liquid metal is soaked and solidified in a layer of cooling liquid deposited on a moving surface, characterized in that accelerating the dissipation of the turbulence of the cooling liquid upstream of the point of impact of the metal jet on said liquid.
  • the invention also relates to a device for the continuous casting of fine metal wire comprising a reservoir provided with a nozzle through which flows a jet of liquid metal, said reservoir being placed above a moving surface on which is deposited, by means of a supply line, a layer of cooling liquid in which said metal jet is quenched and solidified, device characterized in that, with the aim of accelerating the dissipation of the turbulence of the cooling liquid, it further comprises a fine mesh grid disposed across the layer of cooling liquid between the outlet of said supply pipe and the point of penetration of the metal jet in the layer of cooling liquid.
  • this grid is placed at the end of the supply pipe.
  • this grid is to "chop" the flow of the liquid so as to reduce the size of the turbulence, which facilitates their rapid dissipation.
  • This grid is placed on the path of the cooling liquid between its exit from the pipe and the point of penetration within it of the metal jet.
  • the swirls inside the coolant Before passing through the grid, the swirls inside the coolant have a certain characteristic size. If this characteristic size is greater than the grid mesh, the crossing of the latter splits the vortices into smaller vortices, the size of which is of the order of the grid mesh.
  • the turbulence of a flow decreases all the more quickly the smaller the size of the vortices. Imposing a small size on these vortices as soon as possible (preferably from the outlet of the pipe) by means of the grid therefore makes it possible to advance the transition from a turbulent flow regime of the coolant to a laminar flow regime . In general, the turbulence decreases all the faster the finer the mesh of the grid.
  • the single appended figure shows diagrammatically, seen in longitudinal section, a direct wire casting installation provided with a device according to the invention.
  • This installation is supplied by a reservoir 1 containing the metal to be poured 2 in the liquid state.
  • This tank 1 is provided with means 3 for blowing a neutral gas ensuring on the one hand the protection of the metal 2 against contamination by the atmosphere and on the other hand a pressurization of the tank which contributes to the regulation of the metal flow. It also includes means 4 for heating the liquid metal, and a nozzle 5 through which the metal flows, forming a jet 6. The diameter of this nozzle is equal to or slightly greater than that of the wire which it is desired to run.
  • the nozzle 5 overhangs a conveyor belt 7 provided with a groove (not shown) and the movement of which is ensured by means symbolized by the rotating pulleys 8 and 8 ′.
  • the pipe 9 brings inside the groove of the strip 7 a cooling liquid 10.
  • the grid 11 At the end of this pipe 9 is fixed the grid 11 according to the invention, which has meshes 11 ′.
  • a rectilinear shape is imposed on the strip 7.
  • the metal jet penetrates into the layer of coolant at point 12 located above the nozzle 5 Under the action of the liquid and its movement, it solidifies in the form of a continuous wire 13 and takes a curved shape before coming into contact with the strip 7.
  • the installation also includes means (not shown) to pick up and wind the thread after it has left the strip 7.
  • the grid can be placed at the end of the supply pipe, which makes it possible to reduce the turbulence as soon as possible.
  • Such disturbances could be caused by sudden changes in the direction of flow, for example in the area where the liquid comes into contact with the solid moving surface.
  • this arrangement of the grid is preferable only if at the time of this contact, the direction of flow of the liquid, which is imposed by the orientation of the pipe, and the direction of movement of the solid surface are substantially parallel. .
  • the mesh size of the grid is preferably less than 1/10 of the diameter of the supply pipe or, more generally, 1/10 of the thickness of the layer of liquid.
  • the section for the passage of the liquid through the grid must be sufficient to avoid too high pressure drops in the flow of the liquid.
  • the meshes have a size between 0.5 and 10 mm.
  • Another option consists in not modifying the other operating conditions, but in bringing the point of introduction of the metal jet into the liquid and the point of arrival of the cooling liquid closer to the moving surface. It is thus possible, without modifying the quality of the wire and the productivity of the installation, to considerably reduce the size thereof.
  • the grid is not necessarily attached to the coolant supply line.
  • the main thing is that it is located on the path of the liquid, at a point sufficiently distant from the point of penetration of the metal jet so that, at the latter point, the turbulence of the liquid is significantly attenuated.
  • the invention is applicable to installations for casting wires for which the moving surface plumb with the liquid metal reservoir has a curvature whose concavity is oriented towards said reservoir.
  • This type of installation includes in particular those which consist of a rotating drum, the internal surface of which supports the coolant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Extraction Processes (AREA)
  • Wire Processing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating With Molten Metal (AREA)
EP89470027A 1988-12-22 1989-12-06 Procédé et dispositif de coulée continue de fil métallique fin Expired - Lifetime EP0378036B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89470027T ATE87517T1 (de) 1988-12-22 1989-12-06 Verfahren und vorrichtung zum stranggiessen von duennem metalldraht.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8817366 1988-12-22
FR8817366A FR2640898B1 (enrdf_load_stackoverflow) 1988-12-22 1988-12-22

Publications (2)

Publication Number Publication Date
EP0378036A1 EP0378036A1 (fr) 1990-07-18
EP0378036B1 true EP0378036B1 (fr) 1993-03-31

Family

ID=9373552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89470027A Expired - Lifetime EP0378036B1 (fr) 1988-12-22 1989-12-06 Procédé et dispositif de coulée continue de fil métallique fin

Country Status (9)

Country Link
US (1) US5035280A (enrdf_load_stackoverflow)
EP (1) EP0378036B1 (enrdf_load_stackoverflow)
JP (1) JPH02217142A (enrdf_load_stackoverflow)
AT (1) ATE87517T1 (enrdf_load_stackoverflow)
BR (1) BR8906655A (enrdf_load_stackoverflow)
CA (1) CA2006167A1 (enrdf_load_stackoverflow)
DE (1) DE68905793D1 (enrdf_load_stackoverflow)
FR (1) FR2640898B1 (enrdf_load_stackoverflow)
RU (1) RU1819186C (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35624E (en) * 1990-01-05 1997-10-07 Kiilunen; David D. Wires made of copper-based alloy compositions
US6527043B2 (en) * 2001-05-01 2003-03-04 Antaya Technologies Corporation Apparatus for casting solder on a moving strip
DE102006042501B4 (de) * 2006-09-07 2010-11-25 Eisenmann Anlagenbau Gmbh & Co. Kg Verfahren und Anlage zum Trocknen von Gegenständen
RU2467827C1 (ru) * 2011-04-26 2012-11-27 Федеральное Государственное Унитарное Предприятие "Научно-Производственное Объединение "Техномаш" Способ литья проволоки и установка для его осуществления
JP7400578B2 (ja) * 2020-03-24 2023-12-19 Tdk株式会社 合金薄帯および磁性コア

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960200A (en) * 1972-11-14 1976-06-01 Allied Chemical Corporation Apparatus for liquid quenching of free jet spun metal
EP0039169B1 (en) * 1980-04-17 1985-12-27 Tsuyoshi Masumoto Amorphous metal filaments and process for producing the same
JPS5758958A (en) * 1980-09-24 1982-04-09 Matsushita Electric Ind Co Ltd Production of metallic strip
JPS57156863A (en) * 1981-03-24 1982-09-28 Mitsubishi Heavy Ind Ltd Method and device for manufacturing porous and amorphous metallic tape
JPS61119354A (ja) * 1984-11-15 1986-06-06 Hitachi Metals Ltd 金属細線の製造方法及び装置
JPS61137653A (ja) * 1984-12-11 1986-06-25 Ishikawajima Harima Heavy Ind Co Ltd 金属細線の製造方法

Also Published As

Publication number Publication date
EP0378036A1 (fr) 1990-07-18
DE68905793D1 (de) 1993-05-06
JPH02217142A (ja) 1990-08-29
FR2640898A1 (enrdf_load_stackoverflow) 1990-06-29
FR2640898B1 (enrdf_load_stackoverflow) 1993-06-11
BR8906655A (pt) 1990-08-21
CA2006167A1 (fr) 1990-06-22
ATE87517T1 (de) 1993-04-15
US5035280A (en) 1991-07-30
RU1819186C (ru) 1993-05-30

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