EP0193422A1 - Verfahren und Vorrichtung zum Behandeln von metallischen Leitungsdrähten - Google Patents

Verfahren und Vorrichtung zum Behandeln von metallischen Leitungsdrähten Download PDF

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Publication number
EP0193422A1
EP0193422A1 EP86400114A EP86400114A EP0193422A1 EP 0193422 A1 EP0193422 A1 EP 0193422A1 EP 86400114 A EP86400114 A EP 86400114A EP 86400114 A EP86400114 A EP 86400114A EP 0193422 A1 EP0193422 A1 EP 0193422A1
Authority
EP
European Patent Office
Prior art keywords
bath
profiles
treatment
contact
profile
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.)
Ceased
Application number
EP86400114A
Other languages
English (en)
French (fr)
Inventor
André Poncelet
Hyacinthe Getti
Michel Faugouin
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.)
SA PGF PROCEDE DE GALVANISATION DE FILS
Trefilunion SA
Original Assignee
SA "pgf" Procede De Galvanisation De Fils
Trefilunion 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 SA "pgf" Procede De Galvanisation De Fils, Trefilunion SA filed Critical SA "pgf" Procede De Galvanisation De Fils
Publication of EP0193422A1 publication Critical patent/EP0193422A1/de
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material

Definitions

  • the present invention relates to the field of techniques for coating conductive profiles, in particular metal profiles. It relates more particularly to a process for treating conductive profiles, in particular metal wires, making it possible to produce on such profiles a deposit in at least one electrically conductive material. It will be understood that this method applies in a more particularly advantageous manner to the treatment of metallic wires, and more generally of wires or other profiles made of electrically conductive materials, with metallic coatings, the particularly preferred case of the invention concerning the coating. of steel wire by zinc, by the technique called "galvanization".
  • the invention also relates to a device or an installation making it possible to carry out the abovementioned treatment.
  • the invention relates to the processing of profiles.
  • This expression is intended to cover here, not only the metal wires stricto sensu, but more generally, all the products made up of an electrically conductive material having a length, so that it is possible to process them by scrolling. through treatment baths, or in particular by unwinding them from supply coils, to wind them on receiving coils at the outlet of the installation, or to condition them by cutting to length.
  • the treatment of these profiles is carried out by baths of electrically conductive materials in the liquid state under the conditions of treatment, either as a general rule, by a metal or a molten metal alloy.
  • This galvanizing can be performed in series with conventional treatments to improve the mechanical properties of the steel, which involves passing the son by an annealing furnace, tunnel-type, possibly the th-nt with a bath quenching, then by cooling stations, pickling, rinsing, before reaching the aforementioned preheating and the zinc bath itself.
  • the present patent application aims to overcome the aforementioned drawbacks. It also makes it possible to improve the mechanical and physico-chemical properties that are usually sought in galvanized steel wires or, more generally, in any profile coated or treated in a similar manner.
  • the subject of the invention is a method for treating profiles of electrically conductive materials, according to which said profiles are made to pass through a liquid treatment bath, characterized in that said profiles are heated by the Joule effect, prior to their immersion in said bath by passage through an intermediate conductive contact bath brought to a high potential with respect to the treatment bath and to a preliminary conductive bath.
  • the profiles are preferably carried in this way until reaching, at the entry of the treatment bath, a temperature higher than that of this bath, to maintain it at the useful treatment temperature.
  • the thus bringing to a temperature higher than the vaporization temperature of said treatment bath also makes it possible very often to improve the result of the treatment.
  • An electrically conductive treatment bath can constitute one of the contacts between which the current flows through the profiles, along the section between the contacts. In this case, before immersion in said treatment bath, the profile is passed through a conductive contact bath.
  • said profile Prior to said contact bath, said profile is advantageously passed through a degreasing bath; the electrical contacts are then distributed: as regards the first contact at the level of the degreasing bath, for the second contact at the level of said contact bath, and as regards the third contact, ensuring with the second the heating by effect Joule of said profile, at the level of the treatment bath.
  • the profile consists of a steel profile.
  • the treatment bath consists of a zinc bath.
  • the contact bath preceding the treatment bath can be constituted by a molten metal bath, for example by a lead bath, or by an electrolyte bath.
  • a contact bath prior to degreasing can be constituted by an electrolytic bath.
  • a periodic reversal of polarity makes it possible to alternate on the profile, the anodic and cathodic effects of the treatment.
  • One of the advantages of the invention lies in the ease of simultaneous processing of several wires or several sets of wires.
  • each of the wires or profiles can be replaced by a plurality of wires or profiles, for example in sheet form.
  • the profile is advantageously surrounded by a protective envelope between the contact bath and the treatment bath.
  • the invention also relates to a device or an installation for carrying out the treatment of electrically conductive profiles and more particularly of metallic wires.
  • This installation comprises a tank containing a liquid treatment bath and means for heating the profile before its penetration into said tank. It is characterized in that said means for heating the profiles comprise a source of electric current, the poles of which are respectively connected to said treatment bath and to a contact bath crossed by said profiles upstream on their running circuit.
  • the invention naturally also relates to the electrically conductive profiles, and more particularly the metal wires treated according to the method of the invention or obtained in an installation in accordance with the above-mentioned provisions.
  • the installation successively comprises, on the circuit, an electrolytic bath tank with electronic ground, an intermediate contact bath tank brought to a high potential with respect to mass, and a treatment tank containing a zinc bath, also grounded, and it includes associated electronic means for adjusting the current applied to each wire so as to maintain constant its temperature at the entrance of the treatment bath.
  • an electrolytic bath tank with electronic ground an intermediate contact bath tank brought to a high potential with respect to mass
  • a treatment tank containing a zinc bath also grounded
  • it includes associated electronic means for adjusting the current applied to each wire so as to maintain constant its temperature at the entrance of the treatment bath.
  • the installation described comprises a reserve of untreated wires 1, means for putting a wire 2 leaving the supply of wires 1 under tension, a tank 3 containing the treatment bath 4.
  • the wire 2 which leaves the wire reserve 1 and which will then be directed to a reel 5 at the end of the treatment, passes in a first step, in a device 6 constituting the first electrical contact, in an electrolytic degreasing bath of the wire .
  • the wire ends up in a tank 7 containing a molten metal 8, for example molten lead, in which a second electrical contact is ensured.
  • the tank 7 can contain an electrolytic bath which also provides a pickling function for the wire, based on sulfuric steel or soda, and it can be terminated by a rinsing device.
  • the metal wire passes through a tube 9, which avoids contact with the ambient air, and enters the tank 3 which contains the treatment, that is to say of molten zinc 4, which provides a third electrical contact with the running wires.
  • the potentials, and therefore the intensity of the current flowing through the wire 2 can be adjusted as a function, on the one hand, of the electrical properties, in particular of the electrical resistance of the wire, and of the running speed of the latter.
  • the potential is high at the second contact (lead bath), the other two being electrically grounded.
  • the circulation of the current along the section of wire heats it so that the wire enters the tank 3, at the point indicated by the reference 10, at a temperature which is the highest of the installation and which may be higher than the vaporization temperature of the treatment bath 4. In the case of zinc, this vaporization temperature is approximately 907 ° C.
  • the wire thus coated is subjected to a gas jet, then to an air jet, and finally to a spraying with water, before being stored by means of the reel 5 in a manner known per se.
  • the process of the invention when applied to the galvanization of steel wires with patenting, is implemented so as to heat the wires above the austenization point of the steel, that is to say - say at a temperature above 950 ° C.
  • the first contact in the particular case considered here, is constituted by an electrolytic degreasing bath which is common to all the wires and grounded.
  • a periodic reversal of the polarity at the second contact makes it possible to alternate in the degreasing bath, the anodic etching phases and the cathodic etching phases.
  • the second contact results in arrivals of potential, isolated with respect to the earth, in as many individual contacts as there are wires or layers of which it is desired to control the heating separately, these then passing through individual conduits. .
  • the third contact consists of the zinc bath, which is earthed. It is common to the various sons.
  • the highest wire temperature is found just at the entrance of the zinc bath.
  • the adjustment of this temperature to the desired level can be carried out using a closed loop regulation assembly assisted by a computer.
  • the variation in current can be obtained by the regulation assembly.
  • the temperature at the inlet of the treatment bath will depend, of course, on the nature of the material constituting this treatment bath. Thereafter it will be maintained at the value chosen by means of a regulation assembly which will be described below with reference to the figure.
  • references 21, 20 and 19 respectively designate the means which provide the gas jet, the air jet and the water spray at the outlet of the zinc bath.
  • the respective voltages are imposed on the three baths by a current source 17. It can be a direct current when the intermediate contact bath is a liquid metal, but an alternating current is preferably used in connection with the use an electrolyte for this contact bath.
  • the quantity to be kept constant is the temperature of each of the individual wires at the inlet 10 into the treatment bath 3, which, for a determined current in the transmission of wires, comprised between the intermediate bath and the treatment bath 3, can be influenced, for example by inevitable variations occurring in the speed of travel of the thread. However, it is not the temperature itself which is measured, but rather the tension of the section of wires leaving in the tube 9, this tension being detected by the voltmeter 16, much more easily than one could detect the temperature.
  • the intensity of the current flowing in this section is calculated at 13, as being equal to the difference between the total intensity flowing at 14 towards the intermediate contact bath 8 and the secondary intensity flowing at 12 from the preliminary bath 6.
  • the electrical resistance R of the section is calculated in 15 from the potential difference between these terminals and the current intensity to be used as a reference quantity kept constant and equal to a set value predetermined by the regulation. For each type of wire, this setpoint is determined as a function of the desired temperature by comparison with known groups which represent the variations in electrical resistance in temperature function.
  • the three contacts are preferably connected to each other by sealed and insulating conduits allowing the passage of the wire and limiting the losses by convection and radiation.
  • Another advantage provided by the invention lies in the dimensions of the new installation.
  • the treatment tank itself is of smaller dimensions, since the reactions between the metal constituting the wire and the treatment bath being very rapid, the length of this tank is greatly reduced.
  • a second advantage of the invention lies in the energy balance, since coefficients of the order of 7 to 8 can be achieved.
  • the method of the invention makes it possible, in fact, to avoid the steps of pickling, rinsing, fluxing, drying and heating of the treatment bath which were required before the present invention.
  • the calories are brought to the treatment bath by the wire and it is no longer necessary to heat, for example the zinc tank in the case of galvanization, during operation. Only a heating device to compensate for losses during the shutdown of the installation is necessary.
  • the coated wires, in particular the galvanized steel wires, produced by the process of the invention have remarkable mechanical and chemical properties due to the excellent adhesion of the coating, for example zinc on this wire.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Non-Insulated Conductors (AREA)
EP86400114A 1985-01-22 1986-01-21 Verfahren und Vorrichtung zum Behandeln von metallischen Leitungsdrähten Ceased EP0193422A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8500852A FR2576323A1 (fr) 1985-01-22 1985-01-22 Procede de traitement de profils conducteurs, notamment metalliques, installation pour sa mise en oeuvre et profils traites ainsi obtenus
FR8500852 1985-01-22

Publications (1)

Publication Number Publication Date
EP0193422A1 true EP0193422A1 (de) 1986-09-03

Family

ID=9315481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400114A Ceased EP0193422A1 (de) 1985-01-22 1986-01-21 Verfahren und Vorrichtung zum Behandeln von metallischen Leitungsdrähten

Country Status (10)

Country Link
US (1) US4714626A (de)
EP (1) EP0193422A1 (de)
JP (1) JPS61199062A (de)
CN (1) CN86100909A (de)
AU (1) AU5246386A (de)
ES (1) ES8705533A1 (de)
FR (1) FR2576323A1 (de)
NZ (1) NZ214887A (de)
PT (1) PT81892B (de)
ZA (1) ZA86424B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2749324A1 (fr) * 1996-06-04 1997-12-05 Thermocompact Sa Procede et dispositif de zingage d'un fil d'electroerosion, et fil ainsi obtenu

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101024890B (zh) * 2007-01-11 2010-09-01 福州大学 一种线材电镀或预处理加热工艺
CN101783210B (zh) * 2009-12-09 2011-08-10 九川(浙江)科技股份有限公司 铜包铝排制造用清洗干燥一体化设备
JP6062221B2 (ja) * 2012-11-21 2017-01-18 高周波熱錬株式会社 加工装置用ガス封入機構及び加工装置
JP6389682B2 (ja) * 2014-07-29 2018-09-12 高周波熱錬株式会社 メッキ線の製造装置及び製造方法
CN114525513B (zh) * 2022-01-14 2023-07-21 马鞍山法尔盛科技有限公司 一种钢丝加工用表面预处理工艺
CN115852287B (zh) * 2023-02-02 2023-06-06 烟台元泰金属材料技术有限公司 一种金属复合丝的热复合系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR800714A (fr) * 1935-01-10 1936-07-17 Perfectionnements aux procédés et appareils pour le recouvrement d'objets métalliques à l'aide d'une ou de plusieurs couches de métaux différents
FR875055A (fr) * 1940-01-12 1942-09-05 Kohle Und Eisenforschung Gmbh Procédé de zingage continu d'objets en fer ou en acier de grande longueur
DE888791C (de) * 1941-10-22 1953-09-03 Westfaelische Union A G Fuer E Verfahren zum Feuerverzinken von Eisen- und Stahldraehten und -baendern
FR1127668A (fr) * 1954-07-19 1956-12-21 Procédé et installation perfectionnée pour la recuisson et le doublage, notamment pour le zingage, de fils tréfilés et laminés en fer ou en acier et de produits analogues
US3010844A (en) * 1961-01-06 1961-11-28 Nat Steel Corp Galvanizing
US3215115A (en) * 1963-01-25 1965-11-02 Midland Ross Corp Coating apparatus including means in control of thermal-pretreating device
FR2261348A1 (de) * 1974-02-19 1975-09-12 Signode Corp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB385971A (en) * 1931-04-27 1932-12-28 Thaddeus Kazimir Sendzimir Improvements relating to coating with metals by dipping
US2286194A (en) * 1939-03-08 1942-06-16 Northwestern Steel & Wire Co Process for making galvanized articles
FR1526442A (fr) * 1967-05-30 1968-05-24 Nokia Oy Ab Procédé et appareil pour recuire et revêtir de façon continue un fil de métal
DE2818155A1 (de) * 1978-04-26 1979-11-08 Harald Albrecht Verfahren zum ueberziehen von metallbaendern mit metallschichten in einem entsprechenden schmelzfluessigen metallbad
FR2534361B1 (fr) * 1982-10-06 1988-02-12 Maubeuge Fer Dispositif et procede de reglage de la capacite de chauffe d'une installation thermique pour bande metallique defilant en continu

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR800714A (fr) * 1935-01-10 1936-07-17 Perfectionnements aux procédés et appareils pour le recouvrement d'objets métalliques à l'aide d'une ou de plusieurs couches de métaux différents
FR875055A (fr) * 1940-01-12 1942-09-05 Kohle Und Eisenforschung Gmbh Procédé de zingage continu d'objets en fer ou en acier de grande longueur
DE888791C (de) * 1941-10-22 1953-09-03 Westfaelische Union A G Fuer E Verfahren zum Feuerverzinken von Eisen- und Stahldraehten und -baendern
FR1127668A (fr) * 1954-07-19 1956-12-21 Procédé et installation perfectionnée pour la recuisson et le doublage, notamment pour le zingage, de fils tréfilés et laminés en fer ou en acier et de produits analogues
US3010844A (en) * 1961-01-06 1961-11-28 Nat Steel Corp Galvanizing
US3215115A (en) * 1963-01-25 1965-11-02 Midland Ross Corp Coating apparatus including means in control of thermal-pretreating device
FR2261348A1 (de) * 1974-02-19 1975-09-12 Signode Corp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2749324A1 (fr) * 1996-06-04 1997-12-05 Thermocompact Sa Procede et dispositif de zingage d'un fil d'electroerosion, et fil ainsi obtenu
EP0811701A1 (de) * 1996-06-04 1997-12-10 Thermocompact Verfahren zum Feuerverzinken eines Funkerosionsdrahtes und hergestellter Draht
US5966975A (en) * 1996-06-04 1999-10-19 Thermocompact Societe Anonyme Method and device for zinc plating a spark erosion wire, and wire obtained in this way

Also Published As

Publication number Publication date
AU5246386A (en) 1986-07-31
CN86100909A (zh) 1986-10-08
ZA86424B (en) 1986-09-24
ES551127A0 (es) 1987-05-16
FR2576323A1 (fr) 1986-07-25
PT81892B (pt) 1992-05-29
ES8705533A1 (es) 1987-05-16
NZ214887A (en) 1988-02-12
US4714626A (en) 1987-12-22
JPS61199062A (ja) 1986-09-03
PT81892A (fr) 1986-02-01

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