WO2008031473A1 - Fil de charge, procédé et dispositif de fabrication en continu d'un fil de charge - Google Patents

Fil de charge, procédé et dispositif de fabrication en continu d'un fil de charge Download PDF

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Publication number
WO2008031473A1
WO2008031473A1 PCT/EP2007/006230 EP2007006230W WO2008031473A1 WO 2008031473 A1 WO2008031473 A1 WO 2008031473A1 EP 2007006230 W EP2007006230 W EP 2007006230W WO 2008031473 A1 WO2008031473 A1 WO 2008031473A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal strip
inert gas
filling
gas
filling material
Prior art date
Application number
PCT/EP2007/006230
Other languages
German (de)
English (en)
Inventor
Janek Schaller
Original Assignee
Odermath Stahlwerkstechnik Gmbh
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
Priority claimed from DE102006048028A external-priority patent/DE102006048028B3/de
Application filed by Odermath Stahlwerkstechnik Gmbh filed Critical Odermath Stahlwerkstechnik Gmbh
Publication of WO2008031473A1 publication Critical patent/WO2008031473A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/10—Making tubes with riveted seams or with non-welded and non-soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0244—Powders, particles or spheres; Preforms made therefrom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/406—Filled tubular wire or rods
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/062—Obtaining aluminium refining using salt or fluxing agents

Definitions

  • the invention further relates to a method for the continuous production of a filler wire according to the preamble of claim 5.
  • the invention relates to a device for producing a cored wire of the aforementioned Art.
  • a subsequent treatment of metal melts is usually necessary, which is directly followed by the melting.
  • various treatment agents of metallic or non-metallic nature which are known per se from the prior art, serve for this purpose.
  • the treatment agents can be used as master alloys or as pure substances.
  • a flux cored wire is a hollow wire made of a thin metallic sheath, which is filled with the treating agent to be introduced into the melt as a filling material.
  • the filler wire is introduced by means of a wire injection machine via guide elements at certain speeds in the melt and releases after the melting of the shell, the filler.
  • the filler wire Since most filling materials are in granular or powder form, the filler wire is usually not filled to 100% with the filling material. During manufacture, a void volume remains in the hollow wire filled with air. By reacting the trapped air with the filler, the effectiveness of the filler decreases with increasing time. For example, there may be oxidation reactions between the oxygen contained in the void volume and the filler material. Since the reaction equilibrium of the reaction conditions such as temperature and pressure Even with such fillers that react under normal conditions, or only very slowly with the trapped air in the void volume, it can not be ruled out that at the time of introduction of the filler wire in the molten metal during heating of the filler wire to melting temperature to a reaction between the filling material and the trapped air comes. The reactions taking place in the flux-cored wire can lead to the filling material losing its effectiveness and the efficiency when introducing the flux-cored wire into a melt being considerably reduced.
  • Object of the present invention is to provide a cored wire of the type mentioned above, and a method and an apparatus for producing such a cored wire, wherein the filler over a long period of time has a high efficiency and the filler wire with high efficiency in a melt can be introduced is.
  • gas atmosphere refers to the composition of the gas space surrounding the metal strip and / or the filling material during the production process of the filler wire. It is understood that the term “gas atmosphere” is understood to mean, in particular, the proportions of the gas space which can be included in the void volume during the production of the filler wire. As a result, the reduction goes to the Oxygen concentration in the surrounding gas space associated with the reduction of the oxygen concentration in the void volume of the filler wire.
  • the manufacturing process of the filler wire may be partially performed under vacuum. It is simpler and less expensive to run the production process with an increased amount of inert gas relative to air.
  • the air in the gas atmosphere is at least partially displaced or replaced by an inert gas. This leads to the fact that the void volume in the filler wire has a concentration of at least one inert gas which is increased in relation to air as protective gas.
  • the inert gas concentration in the gas atmosphere can be adjusted to a value greater than 50% by volume, preferably greater than 80% by volume, in particular greater than 90% by volume , It is understood that for controlling or controlling the Inertgasanteils in the gas atmosphere per se known from the prior art control or control means and methods can be used.
  • the gas atomic sphere in the void volume essentially corresponds to the gaseous atmosphere which is produced during production of the filler wire, namely during deformation of the metal strip into a fillet and / or during filling of the fill material into the fillet and / or during subsequent closing of the fillet Forming a jacket, in the vicinity of the metal strip is present.
  • the void volume may have an inert gas concentration of greater than 50% by volume, preferably greater than 80% by volume, in particular greater than 90% by volume.
  • an inert gas concentration in the void volume of about 100% can also be achieved.
  • the manufacturing process of the filler wire as a whole can be performed under a gas atmosphere with increased inert gas, it is preferably provided that only in connection with the filling and / or the subsequent closing of the metal strip to form the shell a protective gas-rich atmosphere in the vicinity of the metal strip is generated , As a result, it can be ensured in a simple and cost-effective manner that the void volume of the filler wire has a desired gas composition with a reduced oxygen concentration compared with air.
  • the production of the cored wire can be carried out at least partially under an open gas atmosphere, the inert gas being selectively supplied to the metal strip and / or the filler material.
  • an inert gas volume flow is fed directly to the metal strip.
  • the air in the region of the metal strip is at least partially displaced or replaced by the inert gas volume flow, so that essentially an inclusion of inert gas in the gap volume of the filler wire occurs during the production of the metal strip.
  • the production of the filler wire can also take place at least partially under closed gas atmosphere, whereby it is necessary to form a closed gas atmosphere to run the manufacturing process of the filler wire at least partially housed. Within the enclosure then a desired gas atmosphere is set.
  • the inert gas may be present to the metal strip and / or the filling material immediately before and / or during filling and, preferably, immediately before closure of the metal strip.
  • the inert gas may already be sufficient for the inert gas to be supplied to the metal strip and / or the filling material only before and / or during the filling, wherein, preferably, the inert gas is fed to the metal strip just above the groove. It may be so that the air in the groove is partially or completely displaced by the Inertgasvolumenstrom. Since it can come when filling the groove with the filler material to escape inert gas from the groove, it is also advantageous to direct the inert gas flow directly to the filler, so that in the filling area, the air is displaced.
  • the inert gas is supplied to the metal strip and / or the filling material in the region above the groove formed by the metal strip, it may be provided that an inert gas having a higher density than air, preferably a noble gas, in particular xenon, is used.
  • a noble gas in particular xenon
  • Carbon dioxide can also be used as protective gas, as well as gas mixtures. Due to the higher density of the protective gas, there is a displacement process of the lighter air contained in the groove through the sinking into the groove heavier inert gas.
  • the inert gas can be inflated from above on the metal strip and / or the filling material in the appropriate places.
  • the inert gas can be introduced into the groove directly and / or into a filling funnel for the filling material. It is also possible to supply the inert gas to an outlet opening of the filling funnel from the outside in order to create an inert gas atmosphere in the outlet area.
  • the inert gas can be supplied in the conveying direction of the metal strip substantially, wherein, preferably, an inert gas flow at an angle of less than 45 °, in particular of less than 30 °, strikes the metal strip and / or the filling material.
  • inert gas is supplied to the metal strip and / or the filler material at several supply points arranged one behind the other in the advancing direction of the metal strip, wherein, preferably, the supplied inert gas volume flow is at all points is the same size.
  • a second supply point for inert gas can be provided shortly before the closure of the jacket, which inflates inert gas on the filler material on the upper side and thus displaces the entrained air.
  • a first inlet of inert gas may preferably be provided before and / or during filling of the groove with the filler material. The supply of inert gas at several points in the advancing direction of the metal strip ensures that the void volume of the filler wire in each case has a desired inert gas concentration.
  • the inert gas volume flow at a feed point should be more than 5 l / min, in particular about 20 l / min. In principle, it is of course also possible to realize larger inert gas volume flows.
  • At least one gassing device designed for gassing the metal and / or the filler is provided.
  • the gassing device can be designed for spraying the metal strip and / or the filling material with at least one inert gas and have at least one inert gas container and at least one gas supply line.
  • An outlet opening of the gas supply line is preferably aligned with the metal strip and / or the filling material such that it is possible to supply the inert gas to the metal strip and / or the filling material immediately before and / or during filling and, preferably, immediately before closing ,
  • the gassing device for spraying the metal strip and / or the filler may have at least one nozzle which is connected to the outlet opening of the gas supply line.
  • the outlet opening of the protective gas supply line is arranged within a filling funnel for the filling material, preferably in the region of the outlet opening of the filling funnel.
  • the outlet opening of the gas supply line can preferably be arranged inside the filling funnel.
  • the outlet opening of the gas supply line is provided outside of the filling funnel in the region of the outlet opening of the filling funnel.
  • the aim is to enrich the gas atmosphere in the region between the outlet opening of the filling funnel and the metal strip moved past below the outlet opening with an inert gas or to displace the air from this area at least partially or completely.
  • the inert gas can be connected to another gas supply line, the outlet of the further gas supply line in the region of the further deformation means, preferably immediately before the further deformation means is arranged.
  • the arrangement of the outlet opening takes place such that preferably takes place immediately before closing the shell, a new displacement of air, so that when closing the shell is substantially trapped in the filler wire inert gas.
  • the closing of the metal strip takes place under a closed gas atmosphere, it being possible to provide the housing of the further deformation means and of the metal strip in this area to form a closed gas atmosphere.
  • FIG. 1b shows the metal strip shown in FIG. 1a after the first deformation process to form a groove
  • FIG. 1c the metal strip shown in FIG. 1b after filling with a filling material
  • Fig. Id the metal strip shown in Fig. Ic after closing the groove to form a shell
  • a continuous process for producing a filler wire 1 is shown, wherein the filler wire 1 is formed for the treatment of molten metal by means of wire injection and an outer shell formed from a metal strip 2 and a granular and / or powdery filler 3 has.
  • the filling material 3 is accommodated in a closed cavity formed by the metal, the cavity volume being composed of the volume of the filling material 3 and the void volume 4 in the cavity. This is shown in Fig. Id and Fig. Ie, wherein the gap volume 4 is shown enlarged.
  • the filling material 3 is present in the filler wire 1 in the form of a tight packing, with voids forming in the filling material 3 and around the filling material 3, which are referred to below as "gap volumes".
  • the production of the filler wire 1 is running in the inventive method so that initially a flat metal strip 2 is unwound from a mandrel 5 a metal strip roll 6.
  • the metal strip 2 is shown in Fig. Ia.
  • propulsion means are provided for transport or propulsion of the metal strip 2, not shown propulsion means are provided.
  • the metal strip 2 passes through a first cold-forming section I with a plurality of diagrammatically illustrated rollers 7, 8 as deformation means, wherein the metal strip 2 is deformed to form a groove 9.
  • the metal strip 2 has a substantially U-shaped cross-section after deformation. This is shown in Fig. Ib.
  • the metal strip 2 is closed in the other cold forming section II by corresponding schematically illustrated rollers 15, 16 as further deformation means to form a jacket (FIG. Id), so that a closed flux-cored wire 1 is obtained.
  • the conclusion of the manufacturing process forms the crimping of the longitudinal edges of the metal strip 2, which also takes place in the cold forming section II. It is understood that at the location of Umfalzen also a welding of the longitudinal edges can be provided.
  • the finished cored wire 1 is shown in Fig. Ie.
  • the gas atmosphere in the immediate vicinity of the metal strip 2 during the filling process of the metal strip 2 and during the subsequent closing of the metal strip 2 is provided in the manufacturing process shown in FIG Supply of an inert gas 11 to change. This is shown in Fig. Ic, wherein the inert gas 1 1 emerges from a gas supply line 12 and displaces the air from the filling area.
  • the outlet opening of the gas supply line 12 is provided in the region of the lower opening of the filling funnel 10 and arranged just above the metal strip 2.
  • an inert gas 11 with higher density than air can be achieved so that the inert gas 11 flows due to the higher density in the groove 9 and down and displaces the air.
  • the outlet opening in the advancing direction X of the Metal strip 2 aligned to prevent swirling of the inert gas 1 1.
  • the gas supply line 12 is connected to a pressurized gas container 13 designed as a pressure bottle.
  • the pressurized gas container 13 serves to supply inert gas, it being possible, for example, to use xenon or else carbon dioxide as the inert gas.
  • a further gas supply line 14 which ends immediately before the further cold deformation section II.
  • the supply of the inert gas 11 is also carried out here just above the groove formed by the metal strip 2 9, wherein the inert gas 11 is inflated on the top of the filling material 3.
  • the further gas supply line 14 may also have at its end a corresponding nozzle.
  • the gas supply lines 12, 14 may be identical. Moreover, it may be so that in each case the same inert gas volume flow is supplied to the metal strip 2.
  • the supplied inert gas volume flow per time unit depends on the advancing speed of the metal strip 2 or the speed of the wire production and on the volume in the groove 9.
  • an appropriate security provided, in order to take into account that even in the targeted supply of inert gas 1 1 flows to the region of the groove 9 and to the filling material 3, a portion of the inert gas volume flow unused in the environment.
  • the illustrated method is characterized by a very low expenditure on equipment and allows the simple and cost-effective production of the filler wire. 1

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

L'invention présente et concerne un fil de charge (1) destiné à traiter des métaux en fusion par injection du fil, le fil présentant une enveloppe extérieure formée d'un ruban métallique (2) et un matériau de charge (3) granuleux et/ou poudreux logé dans l'espace creux délimité par l'enveloppe. Le volume de l'espace creux est constitué du volume du matériau de charge (3) et du volume (4) des trous présents dans l'espace creux. Pour garantir l'efficacité du matériau de charge à long terme et garantir un haut rendement d'apport de matériau de charge dans du métal en fusion, selon l'invention, le volume (4) des trous présente une concentration en oxygène inférieure à celle de l'air.
PCT/EP2007/006230 2006-09-15 2007-07-13 Fil de charge, procédé et dispositif de fabrication en continu d'un fil de charge WO2008031473A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006044142 2006-09-15
DE102006044142.7 2006-09-15
DE102006048028.7 2006-10-09
DE102006048028A DE102006048028B3 (de) 2006-09-15 2006-10-09 Fülldraht sowie Verfahren und Vorrichtung zur kontinuierlichen Herstellung eines Fülldrahtes

Publications (1)

Publication Number Publication Date
WO2008031473A1 true WO2008031473A1 (fr) 2008-03-20

Family

ID=38518321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/006230 WO2008031473A1 (fr) 2006-09-15 2007-07-13 Fil de charge, procédé et dispositif de fabrication en continu d'un fil de charge

Country Status (1)

Country Link
WO (1) WO2008031473A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10513753B1 (en) 2019-01-03 2019-12-24 2498890 Ontario Inc. Systems, methods, and cored wires for treating a molten metal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915693A (en) * 1972-06-21 1975-10-28 Robert T C Rasmussen Process, structure and composition relating to master alloys in wire or rod form
EP0034994A1 (fr) * 1980-02-26 1981-09-02 VALLOUREC Société Anonyme dite. Produit composite à enveloppe tubulaire et âme en matière pulvérulente compactée et son procédé de fabrication
EP0234623A1 (fr) * 1986-02-10 1987-09-02 Hoogovens Groep B.V. Fil fourré et procédé pour sa fabrication en continu

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915693A (en) * 1972-06-21 1975-10-28 Robert T C Rasmussen Process, structure and composition relating to master alloys in wire or rod form
EP0034994A1 (fr) * 1980-02-26 1981-09-02 VALLOUREC Société Anonyme dite. Produit composite à enveloppe tubulaire et âme en matière pulvérulente compactée et son procédé de fabrication
EP0234623A1 (fr) * 1986-02-10 1987-09-02 Hoogovens Groep B.V. Fil fourré et procédé pour sa fabrication en continu

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10513753B1 (en) 2019-01-03 2019-12-24 2498890 Ontario Inc. Systems, methods, and cored wires for treating a molten metal

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