EP0317738A2 - Procédé et installation pour la fabrication de filaments métalliques minces - Google Patents

Procédé et installation pour la fabrication de filaments métalliques minces Download PDF

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Publication number
EP0317738A2
EP0317738A2 EP88116244A EP88116244A EP0317738A2 EP 0317738 A2 EP0317738 A2 EP 0317738A2 EP 88116244 A EP88116244 A EP 88116244A EP 88116244 A EP88116244 A EP 88116244A EP 0317738 A2 EP0317738 A2 EP 0317738A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
cooling
cooling liquid
fiber
fibers
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Withdrawn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
EP88116244A
Other languages
German (de)
English (en)
Other versions
EP0317738A3 (fr
Inventor
Hans-Werner Dr. Schroeder
Ulrich Dr. Ing. Tenhaven
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.)
Hoesch Stahl AG
Original Assignee
Hoesch Stahl 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 Hoesch Stahl AG filed Critical Hoesch Stahl AG
Publication of EP0317738A2 publication Critical patent/EP0317738A2/fr
Publication of EP0317738A3 publication Critical patent/EP0317738A3/fr
Withdrawn legal-status Critical Current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
    • B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire

Definitions

  • the invention relates to a process for the continuous production of thin metallic fibers with a circular cross section, in which an endless strand of metallic melt is extruded through a spinneret and is solidified and quenched by cooling in an aqueous coolant to form an endless fiber.
  • the invention also relates to a device for carrying out the method, the device having a crucible filled with melt of a metallic material and a cooling device in which a strand of molten material is quenched and solidified into a metallic continuous fiber.
  • the method according to the invention and the device according to the invention enable the production of metallic fibers with a uniform circular cross section.
  • the fibers can solidify microcrystalline, semi-crystalline or, depending on the selected alloy system, glassy. Alloys from the systems Fe-B, Co-B, Ni-B, Pd-Si, Fe-Si-B, Fe-Ni-B, Nb-Ni, Cu-Ti, Fe- are particularly suitable for glassy solidification.
  • Fibers made from such alloys have high strength, are corrosion-resistant or are characterized by good electrical and magnetic properties.
  • Metallic fibers made of iron-based alloys with high proportions of chrome, molybdenum or tungsten or fibers that contain intermetallic phases such as NiAl or CoFeAl are characterized by a high modulus of elasticity.
  • Such fibers can be used for the production of composite materials with specifically set material properties, the fibers, introduced in a suitable matrix, reflecting the properties of the finished component, e.g. B. improve the strength and rigidity.
  • Metallic fibers processed into cables and braids can be used as electrically conductive cables and as magnetic shielding of electrical components. Since the properties of the metallic fibers produced according to the invention are very variable, they can also be used instead of glass fibers, carbon fibers and aramid fibers to reinforce components. They can also be used as a replacement for thin, high-strength metal wires, which are produced by hot rolling high-strength steel grades, cold drawing and corresponding heat treatments, for reinforcing automotive tires as steel cords.
  • the device shown in Fig. 1 for performing the inventive method for producing metallic fibers has an extrusion device 2, which is filled with molten material, the unspecified feeds for melt and inert gases such as. B. argon, helium or nitrogen and an unspecified nozzle with one or more outlet openings.
  • inert gases such as. B. argon, helium or nitrogen
  • unspecified nozzle with one or more outlet openings.
  • the cooling liquid 1 is pumped into the pressure vessel 10 by means of a pump 6, a valve 13, a heat exchanger 7 and the piping system 8.
  • the pressure gauge 12 allows the liquid pressure in the pressure vessel 10 to be determined; with the help of the valve 11, the pressure of the cooling liquid 1 is finely regulated.
  • the cooling liquid 1 After opening the gate valve 15, the cooling liquid 1 enters the cooling channel 9 via a nozzle (not shown). From the outlet end of the cooling channel 9, the cooling liquid 1 flows into the collecting container 5 via a collecting device in order to be introduced from there again into the pressure container 10 via the pump 6.
  • a fiber reel 14 protruding into the collecting container 5 permits the continuous winding of the metallic fibers produced with the device described above.
  • the method according to the invention is carried out with the device shown schematically in FIG. 1 as follows:
  • the cooling liquid 1 is pumped through the pipeline system 8 into the pressure vessel 10 by means of a pump 6.
  • the valve 13 regulates the flow rate.
  • the cooling liquid 1 is kept in the heat exchanger 7 at a temperature between 5 ° C. and 30 ° C.
  • the pressure measuring device 12 and the control valve 11 allow the reading and the fine adjustment of the coolant pressure in the pressure vessel 10.
  • the coolant 1 flows through a nozzle, not specified, into the Cooling channel 9 at a speed of at least 3 m / s, advantageously between 3 m / s and 18 m / s, preferably between 5 m / s and 12 m / s.
  • cooling liquid drops below 3 m / s, it becomes impossible to generate cooling speeds of more than 104 K / s in order to produce thin metallic fibers with a glassy or crystalline non-equilibrium structure.
  • cooling rates 10 von-105 K / s are required, which are achieved with the device according to the invention.
  • the tendency to form glass or to form a crystalline metastable state in the metallic fiber 3 is of course also determined by the diameter of the fiber 3, the alloy composition of the fiber 3, the choice of the cooling liquid 1 and the temperature of the cooling liquid 1.
  • molten material is injected into the cooling liquid 1 from the extrusion device.
  • the exit velocity of the molten material from the extrusion device 2 can easily be regulated via the pressure of the inert gas above the melt level and is expediently between 3 m / s and 18 m / s, but between 10% and 40% below the speed of the cooling liquid 1 im Cooling duct 9.
  • the unspecified nozzle of the extrusion device 2 has one or more outlet openings which have a circular cross section and whose diameter is between 50 ⁇ m and 1,000 ⁇ m, suitably between 100 ⁇ m and 300 ⁇ m.
  • the jet of molten material squeezed out of the nozzle of the extrusion device 2 forms with the flow direction Cooling liquid 1 in the cooling channel 9 an angle, which should preferably assume values between 45 ° and 90 °.
  • the distance between the outlet openings of the extrusion device 2 and the surface of the flowing cooling liquid 1 in the channel 9 is less than 5 mm.
  • the jet of molten material emerging from the extrusion device 2 is absorbed by the cooling liquid 1 in the cooling channel, cooled and solidified into a metallic fiber 3 with a circular cross section.
  • the thin metallic fiber is continuously wound up by the fiber reel 14.
  • the drive mechanism, the storage and mounting of the fiber reel 14 are not shown in detail.
  • the flow of the cooling liquid flows against the fiber reel 14.
  • a preferred embodiment of the cooling channel 9 is shown schematically in FIG. 2.
  • a strand of molten material is sprayed into the rapidly flowing cooling liquid 1 from the outlet nozzle 4 of the extrusion device 2 under pressure.
  • the strand of molten material solidifies into a solid metallic fiber 3.
  • the cross section of the cooling channel 9 expediently has a smooth shape which does not produce any turbulence in the flowing cooling fluid.
  • Fig. 3 shows another preferred embodiment of the device for the simultaneous production of several thin metallic fibers.
  • This version includes a multiple exit Nozzle 4 a cooling trough 9, the cooling liquid 1 and several solidified metallic fibers 3.
  • the cooling trough 9 is expediently designed so that each strand of molten material emerging from the outlet nozzle 4 can solidify into a metallic fiber 3 independently of the other strands. This has the advantage that in the state of the molten liquid there can be no undesirable contact between the strands, which leads to the fibers 3 adhering to one another, and that the metallic fibers 3 can be wound up separately by a fiber reel 14 or a plurality of fiber reels.
  • a coolant 1 In order to produce an endless metallic fiber of high quality with a circular cross-section from a strand of molten material, a coolant 1 is selected which flows non-turbulently even at high coolant speeds and has a high evaporation temperature and enthalpy of vaporization.
  • the coolant must not enter into any chemical reactions with the molten material or the metallic fiber. Furthermore, it must not be flammable and must have good thermal conductivity.
  • Water is such a suitable coolant, but tends to turbulence and instability at high flow rates, which must be avoided. Adding suitable resistance reducers to the water reduces the Reynolds number and shifts the transition from laminar to turbulent flow to higher flow velocities.
  • Water with an equimolar mixture of sodium salicylate and tetradecyltrimethylammonium bromide has proven to be a particularly suitable cooling liquid.
  • the coolant fulfills all important requirements. Its effectiveness is not impaired by the mechanical load in the pump 6. The flow is quasi-laminar even at the high flow speeds claimed.
  • a metallic fiber was made from the alloy Fe 81.5 B 14.5 Si4.
  • the melting temperature was 1,530 K.
  • the molten alloy was injected with argon from a nozzle with a diameter of 180 ⁇ m at an angle of 75 ° into the cooling channel, in which a mixture of water, sodium salicylate and tetradecyltrimethylammonium bromide at 20 ° C. was heated at a speed of 12 m / s poured.
  • the distance between the outlet opening of the nozzle and the coolant surface was 2 mm.
  • the calculated exit velocity of the molten material from the nozzle was 10 m / s.
  • the thin metallic fiber thus produced had a circular cross section with an average diameter of 150 + 7 ⁇ m.
  • the maximum tensile strength was 3,200 MPa.
  • the amorphous structure could be demonstrated by X-ray diffraction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Continuous Casting (AREA)
EP88116244A 1987-11-25 1988-09-30 Procédé et installation pour la fabrication de filaments métalliques minces Withdrawn EP0317738A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873739847 DE3739847A1 (de) 1987-11-25 1987-11-25 Verfahren und vorrichtung zur herstellung duenner metallischer fasern
DE3739847 1987-11-25

Publications (2)

Publication Number Publication Date
EP0317738A2 true EP0317738A2 (fr) 1989-05-31
EP0317738A3 EP0317738A3 (fr) 1990-05-16

Family

ID=6341173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116244A Withdrawn EP0317738A3 (fr) 1987-11-25 1988-09-30 Procédé et installation pour la fabrication de filaments métalliques minces

Country Status (5)

Country Link
EP (1) EP0317738A3 (fr)
JP (1) JPH01162541A (fr)
DE (1) DE3739847A1 (fr)
ES (1) ES2008662A4 (fr)
GR (1) GR890300102T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013105371B4 (de) * 2013-05-24 2021-02-25 BinNova GmbH & Co. KG Verfahren zum Herstellen mikrofeiner Fasern und Vorrichtung zur Durchführung des Verfahrens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845805A (en) * 1972-11-14 1974-11-05 Allied Chem Liquid quenching of free jet spun metal filaments
DE2719710A1 (de) * 1976-05-04 1977-11-24 Allied Chem Verfahren zum giessen kontinuierlicher faeden mit abschreckwalze und vorrichtung zur durchfuehrung des verfahrens
EP0039169A2 (fr) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Filaments de métal amorphe et procédé pour leur fabrication
EP0076618A2 (fr) * 1981-09-29 1983-04-13 Unitika Ltd. Procédé de fabrication d'un mince fils métallique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119440A (ja) * 1982-01-08 1983-07-15 Takeshi Masumoto 金属細線の製造方法
JPS58173059A (ja) * 1982-03-03 1983-10-11 Unitika Ltd 金属細線の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845805A (en) * 1972-11-14 1974-11-05 Allied Chem Liquid quenching of free jet spun metal filaments
DE2719710A1 (de) * 1976-05-04 1977-11-24 Allied Chem Verfahren zum giessen kontinuierlicher faeden mit abschreckwalze und vorrichtung zur durchfuehrung des verfahrens
EP0039169A2 (fr) * 1980-04-17 1981-11-04 Tsuyoshi Masumoto Filaments de métal amorphe et procédé pour leur fabrication
EP0076618A2 (fr) * 1981-09-29 1983-04-13 Unitika Ltd. Procédé de fabrication d'un mince fils métallique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS *

Also Published As

Publication number Publication date
GR890300102T1 (en) 1989-10-31
DE3739847A1 (de) 1989-06-08
ES2008662A4 (es) 1989-08-01
DE3739847C2 (fr) 1990-04-12
JPH01162541A (ja) 1989-06-27
EP0317738A3 (fr) 1990-05-16

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