WO2017170967A1 - 溶融アルミニウムめっき鋼線の製造方法 - Google Patents

溶融アルミニウムめっき鋼線の製造方法 Download PDF

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Publication number
WO2017170967A1
WO2017170967A1 PCT/JP2017/013474 JP2017013474W WO2017170967A1 WO 2017170967 A1 WO2017170967 A1 WO 2017170967A1 JP 2017013474 W JP2017013474 W JP 2017013474W WO 2017170967 A1 WO2017170967 A1 WO 2017170967A1
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Prior art keywords
steel wire
molten aluminum
hot
plating bath
bath
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PCT/JP2017/013474
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English (en)
French (fr)
Japanese (ja)
Inventor
忠昭 三尾野
鴨志田　真一
服部　保徳
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日新製鋼株式会社
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Application filed by 日新製鋼株式会社 filed Critical 日新製鋼株式会社
Priority to KR1020187028291A priority Critical patent/KR20180126495A/ko
Priority to CN201780017399.6A priority patent/CN108779543A/zh
Priority to EP17775500.6A priority patent/EP3438318A4/en
Priority to US16/088,469 priority patent/US20190136359A1/en
Publication of WO2017170967A1 publication Critical patent/WO2017170967A1/ja

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    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/185—Tubes; Wires
    • 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
    • C23C2/38—Wires; Tubes
    • 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
    • C23C2/12—Aluminium 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/22—Removing excess of molten coatings; Controlling or regulating the coating thickness by rubbing, e.g. using knives, e.g. rubbing solids
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • the present invention relates to a method for producing a hot-dip aluminized steel wire.
  • this invention relates to the manufacturing method of the hot dip aluminized steel wire which can be used conveniently for the wire harness etc. of a motor vehicle, for example.
  • the hot-dip aluminum-plated steel wire is a steel wire that has been subjected to aluminum plating by continuously pulling the steel wire from the hot-dip aluminum plating bath after the steel wire is immersed in the hot-dip aluminum plating bath.
  • the molten aluminum plating bath means a molten aluminum plating solution.
  • a molten Al-plated steel wire in which a molten aluminum plating is applied to a steel core wire has been proposed (for example, refer to claim 1 of Patent Document 1).
  • the molten Al-plated steel wire is made of a steel core wire, or a material steel wire having a galvanized layer or a nickel-plated layer on the surface of the steel core wire is immersed in a molten aluminum plating bath, and then continuously in a gas phase space. And is pulled up (see, for example, paragraph [0024] of Patent Document 1).
  • a method of manufacturing a molten aluminum plated steel wire a method of manufacturing a molten aluminum plated steel wire by continuously pulling up the steel wire from the molten aluminum plating bath after the steel wire is immersed in the molten aluminum plating bath.
  • the steel wire is stable to the bath surface and the steel wire at the boundary between the molten aluminum plating bath and the bath surface of the molten aluminum plating bath.
  • a nozzle having an inner diameter of 1 to 15 mm is disposed so that the tip of the nozzle is located at a distance of 1 to 50 mm from the steel wire, and 200 to 800 from the tip of the nozzle.
  • JP 2014-185355 A Japanese Patent Laying-Open No. 2015-134961
  • the present invention has been made in view of the prior art, and can efficiently produce a hot-dip aluminum-plated steel wire in which a portion having a thin plating film is unlikely to be formed and an aluminum lump is difficult to adhere to the surface. It is an object of the present invention to provide a method for producing a hot-dip aluminized steel wire.
  • the present invention (1) A method for producing a molten aluminum plated steel wire by immersing a steel wire in a molten aluminum plating bath and then continuously pulling up the steel wire from the molten aluminum plating bath, wherein the steel wire is made of the molten aluminum After immersing in the plating bath, the stabilizing member is connected to the boundary between the molten aluminum plated steel wire pulled up from the molten aluminum plating bath and the molten aluminum plating bath, and the molten aluminum plating bath and molten A nozzle for injecting an inert gas to a position facing the stabilizing member through the molten aluminum plated steel wire is disposed in contact with the aluminum plated steel wire, and inert from the tip of the nozzle to the boundary portion
  • a hot-dip aluminized steel wire characterized by blowing gas at a pressure of 0.1 to 20 kPa Production method
  • the method for producing a hot dip galvanized steel wire of the present invention it is possible to efficiently produce a hot dip galvanized steel wire in which a portion having a thin plating film hardly occurs and an aluminum lump is difficult to adhere to the surface. An excellent effect is achieved.
  • FIG. 1 It is a schematic explanatory drawing which shows one embodiment of the manufacturing method of the hot dip galvanized steel wire of this invention. It is a schematic sectional drawing which shows one embodiment of the steel wire introduction part control apparatus shown by FIG. It is a schematic sectional drawing which shows one embodiment of the bath surface control apparatus used for the steel wire introduction part control apparatus shown by FIG. 1 and FIG.
  • the manufacturing method of the molten aluminum plating steel wire of this invention it is a schematic explanatory drawing of the boundary part of the steel wire at the time of pulling up a steel wire from a molten aluminum plating bath, and the bath surface of a molten aluminum plating bath. It is a schematic explanatory drawing which shows one embodiment of the method of measuring the average thickness of the plating film of the hot-dip aluminum plating steel wire obtained by each Example and each comparative example.
  • the method for producing a hot-dip aluminum-plated steel wire of the present invention includes hot-dip aluminum-plated steel by continuously pulling the steel wire from the hot-dip aluminum plating bath after the steel wire is immersed in the hot-dip aluminum plating bath.
  • a method of manufacturing a wire, which is stable at the boundary between the molten aluminum plating steel wire pulled up from the molten aluminum plating bath and the bath surface of the molten aluminum plating bath after the steel wire is immersed in the molten aluminum plating bath And a nozzle for spraying an inert gas to a position facing the stabilizing member through the molten aluminum plated steel wire, with the stabilizing member brought into contact with the bath surface of the molten aluminum plated bath and the molten aluminum plated steel wire.
  • An inert gas is applied from the tip of the nozzle to the boundary portion at a pressure of 0.1 to 20 kPa. And wherein the blowing in.
  • a hot-dip aluminum-plated steel wire of the present invention since the above-described operation is adopted, a hot-dip aluminum-plated steel in which the thickness of the plating film is hardly formed and the aluminum lump is difficult to adhere to the surface. A wire can be manufactured efficiently.
  • FIG. 1 is a schematic explanatory view showing one embodiment of a method for producing a hot-dip aluminized steel wire of the present invention.
  • the steel wire 2 is immersed in the hot dip aluminum plating bath 1, the steel wire 2 is continuously pulled up from the hot dip aluminum plating bath 1 to thereby obtain hot dip aluminum plating steel.
  • Line 3 is manufactured.
  • Examples of the steel material constituting the steel wire 2 include stainless steel and carbon steel, but the present invention is not limited to such examples.
  • Stainless steel is an alloy steel containing 10% by mass or more of chromium (Cr).
  • examples of the stainless steel include austenitic steel materials, ferritic steel materials, martensitic steel materials and the like specified in JIS G4309, but the present invention is not limited only to such examples.
  • the stainless steel include stainless steels such as SUS301 and SUS304, which are generally considered to be metastable; austenitic stainless steels such as SUS305, SUS310, and SUS316; SUS405, SUS410L, SUS429, SUS430, SUS434, Ferritic stainless steels such as SUS436, SUS444, and SUS447; martensitic stainless steels such as SUS403, SUS410, SUS416, SUS420, SUS431, and SUS440, as well as chromium-nickel-manganese stainless steel classified in the SUS200 series
  • the present invention is not limited to such examples.
  • Carbon steel is a steel material containing 0.02% by mass or more of carbon (C).
  • Examples of the carbon steel include steel materials specified in the standard of JIS G3506 hard steel wire rod, steel materials specified in the standard of JIS G3505 mild steel wire rod, etc., but the present invention is limited to such examples only. Is not to be done. Specific examples of carbon steel include hard steel and mild steel, but the present invention is not limited to such examples.
  • stainless steel and carbon steel are preferable from the viewpoint of increasing the tensile strength of the hot-dip aluminized steel wire 3.
  • the diameter of the steel wire 2 is not particularly limited, and is preferably adjusted as appropriate according to the application of the hot-dip aluminized steel wire 3.
  • the diameter of the steel wire 2 is usually preferably about 0.05 to 0.5 mm.
  • the steel wire 2 may be degreased before being subjected to hot dip aluminum plating.
  • the steel wire 2 is degreased by, for example, a method of degreasing the steel wire 2 by immersing the steel wire 2 in an alkaline degreasing solution, washing with water to neutralize the alkali attached to the steel wire 2, and washing again with water. It can be performed by a method in which electrolytic degreasing is performed by energizing the steel wire 2 with the wire 2 immersed in an alkaline degreasing solution.
  • the alkali degreasing solution may contain a surfactant from the viewpoint of improving the degreasing power.
  • the steel wire 2 is sent out from the sending device 4, continuously passed in the direction of arrow A, and immersed in the molten aluminum plating bath 1 in the plating bath 5.
  • the steel wire 2 is the steel wire 2 which consists of carbon steel
  • the steel wire 2 is preferably degreased between the delivery device 4 and the molten aluminum plating bath 1. Degreasing of the steel wire 2 made of carbon steel can be performed by the same method as the degreasing of the steel wire 2.
  • the molten aluminum plating bath 1 only aluminum may be used, and if necessary, other elements may be contained within a range not impairing the object of the present invention.
  • the other elements include nickel, chromium, zinc, silicon, copper, and iron, but the present invention is not limited to such examples.
  • the mechanical strength of the plating film can be increased, and as a result, the tensile strength of the hot-dip aluminum-plated steel wire 3 can be increased.
  • the formation of an iron-aluminum alloy layer having brittleness between the iron contained in the steel wire 2 and the aluminum contained in the plating film Silicon is preferable from the viewpoint of efficiently plating the steel wire 2 by reducing the melting point and increasing the mechanical strength of the plating film and lowering the melting point of the molten aluminum plating bath 1.
  • a plated coating (not shown) made of aluminum or an aluminum alloy is formed on the surface of the molten aluminum plated steel wire 3.
  • the lower limit of the content of the other element in the plating film is 0% by mass, but preferably 0.3% by mass or more, more preferably 0 from the viewpoint of sufficiently expressing the properties of the other element. 0.5% by mass or more, more preferably 1% by mass or more, and preferably 50% by mass or less, more preferably 20% by mass or less, and still more preferably 15% from the viewpoint of suppressing potential difference corrosion due to contact with the aluminum wire. It is below mass%.
  • the lower limit of the bath temperature of the molten aluminum plating bath 1 is a temperature equal to or higher than the melting temperature of the molten aluminum plating bath 1 when the molten aluminum plated steel wire 3 is produced.
  • the temperature is higher than the melting point.
  • the bath temperature of the molten aluminum plating bath 1 is adjusted to a temperature 20 ° C. higher than the melting point of the molten aluminum plating bath 1, the temperature of the inert gas discharged from the tip 12a of the nozzle 12 is room temperature (for example, 0 ° C. Even at the above room temperature), it is possible to obtain a hot-dip aluminum-plated steel wire 3 in which a portion having a thin plating film is hardly formed and an aluminum lump is hardly adhered to the surface.
  • the lower limit value of the bath temperature of the molten aluminum plating bath 1 is that the inert gas discharged from the tip 12a of the nozzle 12 is not heated, so that a thin portion of the plating film is hardly formed, and an aluminum lump is formed on the surface.
  • it is preferably adjusted to a temperature that is 20 ° C. or higher higher than the melting point of the hot-dip aluminum plating bath 1, and a temperature that is 25 ° C. higher than the melting point of the hot-dip aluminum plating bath 1 It is more preferable to adjust to.
  • the upper limit of the bath temperature of the molten aluminum plating bath 1 is preferably 800 ° C. or lower, more preferably 780 ° C. or lower, and further preferably 750 ° C. or lower, from the viewpoint of improving thermal efficiency.
  • the bath temperature of the hot dip aluminum plating bath 1 is from 650 to 650 from the viewpoint of efficiently producing a hot dip aluminum plated steel wire 3 in which a thin portion of the plating film is unlikely to be formed and an aluminum lump is difficult to adhere to the surface. It is preferable that it is 750 degreeC.
  • the bath temperature of the molten aluminum plating bath 1 is a molten aluminum at a position about 300 mm deep from the bath surface of the molten aluminum plating bath 1 by inserting a temperature sensor into a protective tube for protecting the thermocouple. It is a value when immersed in the vicinity of the steel wire 2 pulled up from the plating bath 1 and measured.
  • the hot-dip aluminum plating bath 1 A steel wire introduction part for hot-dip aluminum plating having a heating device 6 for heating the steel wire 2 and a bath surface control device 7 for preventing the oxide film from adhering to the surface of the steel wire 2 before being immersed in the steel wire 2 It is preferable to pass the steel wire 2 through the control device 8.
  • FIG. 2 is a schematic cross-sectional view showing an embodiment of the steel wire introduction section control device 8 shown in FIG.
  • the steel wire introduction unit control device 8 includes a heating device 6 and a bath surface control device 7.
  • the heating device 6 has a tubular heating device body 6a made of a steel material such as stainless steel.
  • the interior 6b of the heating device body 6a is hollow in order to pass the steel wire 2 in the direction of arrow B.
  • a branch pipe 6e having a heating gas vent 6c for ventilating the heating gas is disposed on the side surface of the heating device body 6a.
  • Examples of the heating gas vented to the heating device 6 include air, inert gases such as nitrogen gas, argon gas, and helium gas, but the present invention is not limited to such examples. Absent.
  • emitted from the lower end 6d of the heating apparatus 6 is ventilated into the inside from the inlet of the upper end 7a of the bath surface control apparatus 7 arrange
  • an inert gas is preferable. Since the temperature of the heated gas varies depending on conditions such as the type and diameter of the steel wire 2 used, the wire speed, and the flow rate of the heated gas, it cannot be determined unconditionally. It is preferable to adjust so that is heated appropriately.
  • the heating temperature of the steel wire 2 is preferably 60 ° C. or higher, more preferably 80 ° C. or higher, more preferably 150 ° C. or higher, even more preferably 200 ° C. or higher, from the viewpoint of efficiently producing the hot-dip aluminized steel wire 3.
  • the upper limit varies depending on the type of the steel wire 2 and cannot be determined unconditionally. However, in consideration of energy efficiency, it is usually preferably 1000 ° C. or less, more preferably 900 ° C. or less, and further preferably 800 ° C. or lower.
  • the said heating temperature is a temperature when it measures based on the method as described in a following example.
  • the length of the heating device main body 6a shown in FIG. 2 is not particularly limited as long as the length can be adjusted so that the steel wire 2 is heated to a predetermined temperature. About 1 to 5 m.
  • the diameter of the inside 6b of the heating device main body 6a varies depending on the diameter and type of the steel wire 2 to be used and cannot be determined unconditionally. It is about twice. For example, when the steel wire 2 having a diameter of 0.2 mm is used, the diameter of the inside 6b of the heating device body 6a is preferably about 0.3 to 10 mm.
  • a branch pipe 6e having a heated gas vent 6c is disposed on the side surface of the heating device body 6a.
  • a heater (not shown) is provided in the branch pipe 6e.
  • the heating gas vented into the branch pipe 6e may be heated by the heater.
  • seven branch pipes 6e are provided.
  • the number of branch pipes 6e is not particularly limited, and the number of branch pipes 6e may be only one. Alternatively, it may be about 2 to 10 pieces.
  • a gap D is provided between the lower end 6 d of the heating device 6 and the upper end 7 a of the bath surface control device 7 disposed below the heating device 6.
  • the gap D is preferably about 3 to 10 mm from the viewpoint of efficiently discharging the heated gas from the gap D.
  • the gap D is not necessarily provided, and the heating device 6 and the bath surface control device 7 may be configured as separate members, and may be integrated by, for example, screw fitting.
  • an outlet (not shown) for discharging the heated gas vented into the heating device 6 is provided in the heating device 6 or You may provide in the side surface of the bath surface control apparatus 7.
  • heating device 6 instead of the heating device 6, for example, an electric heating device, an induction heating device, or the like can be used.
  • FIG. 3 is a schematic cross-sectional view showing an embodiment of the bath surface control device 7 used in the steel wire introduction portion control device 8 shown in FIGS. 1 and 2.
  • the bath surface control device 7 has a tubular body 9 having a through hole 9a for allowing the steel wire 2 to penetrate in the direction of arrow C.
  • the overall length L of the bath surface control device 7 is usually preferably 30 to 500 mm, more preferably 40 to 300 mm, and still more preferably 50 to 100 mm.
  • the tubular body 9 has an immersion region 9b for immersing in the molten aluminum plating bath 1 from the end of one end on the side immersed in the molten aluminum plating bath 1 to a virtual line P shown in FIG. 3 along the longitudinal direction.
  • the length of the immersion region 9b is usually preferably 2 to 20 mm, more preferably 5 to 15 mm or more.
  • the length of the portion not immersed in the molten aluminum plating bath 1 is usually preferably 5 mm or more, more preferably 10 mm or more.
  • the value of the area of the opening / the area in the cross section of the steel wire 2 is preferably 3 or more from the viewpoint of smoothly introducing the steel wire 2 into the through hole 9a of the tubular body 9, and is oxidized to the steel wire 2 From the viewpoint of preventing the film from attaching, it is preferably 4000 or less, more preferably 3000 or less, still more preferably 2000 or less, and still more preferably 1000 or less.
  • the shape of the opening of the through hole 9a of the tubular body 9 is arbitrary, and may be circular or other shapes.
  • the gap (clearance) between the opening of the through hole 9a of the tubular body 9 and the steel wire 2 is preferably 10 ⁇ m or more from the viewpoint of preventing sliding between the inner wall of the through hole 9a of the tubular body 9 and the steel wire 2. More preferably, it is 20 ⁇ m or more, more preferably 50 ⁇ m or more, and still more preferably 100 ⁇ m or more.
  • the opening of the through-hole 9 a of the tubular body 9 includes the opening 9 d in the introduction port 9 c for introducing the steel wire 2 to one end of the tubular body 9, and the tubular body 9. It is the opening part 9f in the discharge port 9e for discharging
  • the area and shape of the opening 9d and the opening 9f may be the same or different, but the steel wire 2 is smoothly passed through the through hole 9a of the tubular body 9, and the tubular body 9 From the viewpoint of efficiently producing a hot-dip aluminum-plated steel wire 3 in which a plating film is formed on the entire surface, avoiding sliding between the inner wall of the through-hole 9a and the steel wire 2, as shown in FIG.
  • the area and shape of the opening 9d and the opening 9f are preferably the same.
  • the steel wire 2 that has passed through the steel wire introduction part control device 8 is immersed in the molten aluminum plating bath 1.
  • the wire speed of the steel wire 2 is 100 m / min or more from the viewpoint of efficiently producing the hot-dip aluminum-plated steel wire 3, and the scattering of the oxide film formed on the bath surface of the hot-dip aluminum plating bath 1 is suppressed. From the viewpoint of efficiently producing the hot-dip aluminum-plated steel wire 3 on which the oxide film hardly adheres to the surface, it is preferably 1000 m / min or less, more preferably 800 m / min or less.
  • the time during which the steel wire 2 is immersed in the molten aluminum plating bath 1 (plating time) is adjusted so that the thickness of the plating film formed on the surface of the steel wire 2 becomes a predetermined thickness.
  • the time (plating time) in which the steel wire 2 is immersed in the molten aluminum plating bath 1 varies depending on the required thickness of the plating film, the bath temperature of the molten aluminum plating bath 1, etc., it cannot be generally determined. Usually, it is about 0.3 to 1 second.
  • the steel wire 2 immersed in the molten aluminum plating bath 1 is pulled up from the bath surface 10 of the molten aluminum plating bath 1, whereby the molten aluminum plating bath 1 is formed on the surface of the steel wire 2.
  • a plating film is formed, and a hot-dip aluminum-plated steel wire 3 is obtained.
  • the meniscus 17 is formed by lifting 10.
  • the tip 17a of the meniscus 17 extends upward, the tip 17a of the meniscus 17 solidifies into an aluminum lump, which may adhere to the plating film 18 of the hot-dip aluminum-plated steel wire 3 as a foreign matter. .
  • a molten aluminum plating bath The stabilizing member 11 is brought into contact with the bath surface 10 of the molten aluminum plating bath 1 and the molten aluminum plated steel wire 3 at the boundary between the molten aluminum plated steel wire 3 pulled up from 1 and the bath surface 10 of the molten aluminum plating bath 1.
  • a nozzle 12 for spraying an inert gas is disposed at a position facing the stabilizing member 11 via the hot-dip aluminized steel wire 3.
  • FIG. 4 shows a boundary portion between the steel wire 2 and the bath surface 10 of the molten aluminum plating bath 1 when the steel wire 2 is pulled up from the molten aluminum plating bath 1 in the method for producing a molten aluminum plated steel wire of the present invention. It is a schematic explanatory drawing.
  • the stabilizing member 11 examples include a stainless steel square bar having a heat-resistant cloth material 11a wound around the surface thereof.
  • Examples of the heat-resistant cloth material 11a include woven fabrics and non-woven fabrics containing heat-resistant fibers such as ceramic fibers, carbon fibers, aramid fibers, and imide fibers, but the present invention is limited only to such examples. is not.
  • the heat-resistant cloth material 11a has a surface (new surface) on the surface of the heat-resistant cloth material 11a to which aluminum is not adhered to the surface of the molten aluminum-plated steel wire 3 to prevent the aluminum lump from adhering. It is preferable to contact with.
  • the stabilizing member 11 is preferably brought into contact with both the bath surface 10 of the molten aluminum plating bath 1 and the molten aluminum plated steel wire 3 simultaneously.
  • the stabilizing member 11 is simultaneously brought into contact with both the bath surface 10 of the molten aluminum plating bath 1 and the molten aluminum plated steel wire 3, the pulsation of the bath surface 10 of the molten aluminum plating bath 1 is suppressed.
  • the pulsation of the meniscus 17 is suppressed, so that the plating film 18 can be uniformly formed on the surface of the steel wire 2.
  • the stabilizing member 11 When the stabilizing member 11 is brought into contact with the hot dip galvanized steel wire 3, tension is applied to the hot dip galvanized steel wire 3 as necessary from the viewpoint of suppressing minute vibration of the hot dip aluminum plated steel wire 3. In order to do so, the stabilizing member 11 may be lightly pressed against the hot-dip aluminized steel wire 3.
  • the nozzle 12 for spraying an inert gas is arrange
  • the tip 12 a of the nozzle 12 is disposed so that an inert gas can be blown onto the boundary between the molten aluminum plated steel wire 3 and the bath surface 10 of the molten aluminum plating bath 1.
  • the distance (shortest distance) from the molten aluminum plated steel wire 3 to the tip 12a of the nozzle 12 avoids contact between the tip 12a of the nozzle 12 and the molten aluminum plated steel wire 3, and efficiently produces the molten aluminum plated steel wire 3.
  • a hot-dip aluminum-plated steel wire 3 that is preferably 1 mm or more and has a thin part of the plating film 18 that is hardly formed and hardly has aluminum lump attached to the surface, preferably 50 mm or less, and more Preferably it is 40 mm or less, More preferably, it is 30 mm or less, More preferably, it is 10 mm or less, More preferably, it is 5 mm or less.
  • the inner diameter of the tip 12a of the nozzle 12 is melted by accurately blowing the inert gas discharged from the tip 12a of the nozzle 12 to the boundary portion between the molten aluminum plating steel wire 3 and the bath surface 10 of the molten aluminum plating bath 1.
  • it is preferably 1 mm or more, more preferably 2 mm or more, and a portion with a thin thickness of the plating film 18 is hardly formed and aluminum lump is hardly adhered to the surface.
  • it is preferably 15 mm or less, more preferably 10 mm or less, and further preferably 5 mm or less.
  • the inert gas can be supplied to the nozzle 12 via the pipe 14 from the inert gas supply device 13 shown in FIG.
  • a flow rate control device such as a valve may be provided in the inert gas supply device 13 or the pipe 14.
  • the inert gas means a gas that is inert with respect to molten aluminum.
  • the inert gas include nitrogen gas, argon gas, helium gas, and the like, but the present invention is not limited to such examples.
  • nitrogen gas is preferred.
  • the inert gas may contain, for example, oxygen gas, carbon dioxide gas, or the like within a range that does not impair the object of the present invention.
  • the pressure of the inert gas discharged from the tip 12a of the nozzle 12 is adjusted to 0.1 to 20 kPa.
  • the steel wire 2 is immersed in the molten aluminum plating bath 1 and then pulled up from the molten aluminum plating bath 1, the bath surface of the molten aluminum plated steel wire 3 and the molten aluminum plating bath 1 from the tip 12 a of the nozzle 12. Since the pressure at the tip 12a of the nozzle 12 of the inert gas sprayed on the boundary with the nozzle 10 is adjusted to 0.1 to 20 kPa, a portion with a thin thickness of the plating film 18 hardly occurs, and an aluminum lump is formed on the surface. Can be obtained.
  • the pressure of the inert gas discharged from the tip 12a of the nozzle 12 is 0.1 kPa or more and the thickness of the plating film 18 is thin from the viewpoint of obtaining a molten aluminum-plated steel wire 3 with almost no aluminum lump attached to the surface. From the viewpoint of obtaining a hot-dip aluminized steel wire 3 in which almost no part is generated, it is 20 kPa or less, preferably 10 kPa or less, and more preferably 3 kPa or less.
  • the pressure of the inert gas discharged from the tip 12a of the nozzle 12 is a stainless steel having an inner diameter of 0.5 mm in the inert gas in the nozzle 12 at a distance of 2 mm from the tip 12a of the nozzle 12. This is a value when a manufactured tube is inserted so that the tip of the tube and the tip 12a of the nozzle 12 face each other, and the gas pressure of the inert gas applied to the tip of the tube is measured by a pressure sensor.
  • the volume flow rate of the inert gas discharged from the tip 12a of the nozzle 12 is preferably 2 L (liter) / min or more, more preferably 5 L / min or more, more preferably from the viewpoint of efficiently preventing oxidation of the surface of the meniscus 17.
  • it is 10 L / min or more, and from the viewpoint of obtaining a molten aluminum-plated steel wire 3 in which the thickness of the plating film 18 is hardly generated and the aluminum lump hardly adheres to the surface, preferably 200 L / min or less, more
  • it is 150 L / min or less, More preferably, it is 100 L / min or less.
  • the temperature of the inert gas discharged from the tip 12a of the nozzle 12 is preferably from the viewpoint of obtaining a molten aluminum-plated steel wire 3 in which a portion with a thin thickness of the plating film 18 does not occur and aluminum lump hardly adheres to the surface.
  • From the viewpoint of improving thermal efficiency it is preferably 800 ° C. or lower, more preferably 780 ° C. or lower, and further preferably 750 ° C. or lower.
  • the temperature of the inert gas discharged from the tip 12a of the nozzle 12 is, for example, a sheath thermoelectric having a diameter of 1.6 mm in the inert gas at a distance of 2 mm from the tip 12a of the nozzle 12. It is a value when measured by inserting a thermocouple for temperature measurement such as a pair.
  • the pulling speed at the time of pulling up the molten aluminum plated steel wire 3 from the bath surface 10 of the molten aluminum plating bath 1 is not particularly limited, and exists on the surface of the molten aluminum plated steel wire 3 by appropriately adjusting the pulling speed. Since the average thickness of the plating film 18 can be adjusted, it is preferable to adjust appropriately according to the average thickness of the plating film 18.
  • the cooling device 15 may be disposed above the nozzle 12.
  • the molten aluminum plated steel wire 3 can be cooled by spraying gas, liquid mist, or the like onto the molten aluminum plated steel wire 3.
  • the hot dip galvanized steel wire 3 manufactured as described above can be collected by, for example, a winding device 16 as shown in FIG.
  • the average thickness of the plating film 18 existing on the surface of the hot-dip aluminum-plated steel wire 3 suppresses the base steel wire 2 from being exposed to the outside during stranded wire processing, caulking processing, etc. From the viewpoint of increasing the mechanical strength, it is preferably about 5 to 10 ⁇ m.
  • the minimum thickness of the thin portion of the plating film 18 existing on the surface of the hot-dip aluminum-plated steel wire 3 suppresses the base steel wire 2 from being exposed to the outside during stranded wire processing, caulking processing, and the like. From the viewpoint of increasing the mechanical strength per unit diameter, it is preferably 1 ⁇ m or more, more preferably 2 ⁇ m or more.
  • the surface of the steel wire 2 may be pre-plated before the steel wire 2 is immersed in the molten aluminum plating bath 1.
  • the metal constituting the pre-plating treatment include zinc, nickel, chromium, and alloys thereof, but the present invention is not limited to such examples.
  • the plating film 18 formed on the surface of the steel wire 2 by the pre-plating treatment may be formed of only one layer, or may be a plurality of plating films 18 made of the same or different metals.
  • the hot-dip aluminized steel wire 3 obtained above may be subjected to wire drawing using a die or the like, if necessary, so as to have a desired outer diameter.
  • the hot-dip galvanized steel wire 3 obtained by the method for producing hot-dip galvanized steel wire of the present invention can be suitably used for, for example, a wire harness of an automobile.
  • the steel wire not subjected to galvanization was degreased by dipping in a sodium orthosilicate degreasing solution containing a surfactant before dipping in a molten aluminum plating bath.
  • the steel wire was passed through the steel wire introduction part control device 8 shown in FIG. 2 and the steel wire was preheated to about 400 ° C. by the heating device 6. Nitrogen gas was used as the heating gas.
  • the preheating temperature was measured by preparing a steel wire connected to a thermocouple and passing the thermocouple together with the steel wire through a heating device 6 maintained at a predetermined temperature.
  • the opening 9d and the discharge port in the introduction port 9c of the through hole 9a of the tubular body 9 are provided.
  • the ratio of the area of the opening of the through-hole 9a of the tubular body 9 and the area of the cross section of the steel wire [tubular] using the bath surface control device 7 having the same shape, size and area of the opening 9f in 9e The area of the opening of the through-hole 9a of the body 9 / the area in the cross section of the steel wire] is set to 57, and the steel wire is placed in the molten aluminum plating bath for 0.3 to 1 second via the bath surface control device 7 Soaked.
  • a molten aluminum plating bath As a molten aluminum plating bath, a molten aluminum plating bath (aluminum purity: 99.7% or more, indicated as “Al” in the column of “type of molten Al plating” in each table), a molten containing 4% by mass of silicon Aluminum plating bath (indicated as “4% Si” in the “Type of molten Al plating” column in each table), molten aluminum plating bath containing 8% by mass of silicon (“Type of molten Al plating” in each table) Column, “8% Si”), a molten aluminum plating bath containing 11% by mass of silicon (indicated as “11% Si” in the “type of molten Al plating” column in each table), or 13% by mass Using a molten aluminum plating bath containing silicon (indicated as “13% Si” in the column of “type of molten Al plating” in each table), the wire speed (steel wire) shown in each table at the bath temperature shown
  • a stabilizing member having a width of 40 mm was brought into contact with the bath surface and the molten aluminum plated steel wire at the boundary between the molten aluminum plated steel wire pulled up from the molten aluminum plating bath and the bath surface of the molten aluminum plating bath.
  • the contact length of a hot-dip aluminum plating steel wire and a heat resistant cloth material was adjusted to 5 mm using the square bar made from stainless steel by which the heat resistant cloth material was wound on the surface as a stabilization member.
  • a nozzle having the inner diameter of the tip shown in each table is arranged so that the tip of the nozzle is located at a position 2 mm away from the hot-dip aluminized steel wire, and the temperature shown in each table is adjusted from the tip of the nozzle.
  • the inert gas nitrogen gas was sprayed on the boundary between the molten aluminum plated steel wire and the bath surface of the molten aluminum plating bath at the volume flow rate and pressure shown in each table.
  • the measuring method of the average thickness of a plating film is shown below.
  • the measuring method of the minimum thickness of a thin part is described in the column of the following "(2) Measurement of the minimum thickness of the thin part of a plating film”.
  • FIG. 5 is a schematic explanatory view showing one embodiment of a method for measuring the average thickness of the plated film of the hot-dip aluminum-plated steel wire obtained in each example and each comparative example.
  • the wire-type steel wire diameter measuring device 19 is arranged in the horizontal direction at a center portion between a pair of pulleys 19c and 19d arranged in the vertical direction and between the pulley 19c and the pulley 19d.
  • a wire-type steel wire diameter measuring device 19 having two optical outer diameter measuring instruments (manufactured by Keyence Corporation, product number: LS-7000) having a pair of light emitting section 19a and light receiving section 19b provided was used.
  • a pair of light-emitting portions 19a and light-receiving portions 19b are opposed to each other, and the adjacent light-emitting portions 19a and light-receiving portions 19b are disposed at an angle of 90 ° as shown in FIG.
  • the outer diameter of the hot-dip aluminum-plated steel wire 3 was measured by a through-wire-type steel wire diameter measuring device 19 at intervals of about 1.4 mm in the length direction of the aluminum-plated steel wire 3. In addition, the number of measurement points of the outer diameter was about 71,000 points.
  • the average value of the outer diameter of the hot-dip aluminized steel wire measured above is obtained, and the diameter of the steel wire before forming the plating film (the diameter of the steel wire shown in each table below) is subtracted from the average value. Then, the average value of the plating film was determined by dividing the obtained value by 2. The results are shown in each table.
  • Adhesiveness of aluminum lump A 300 m long molten aluminum plated steel wire is run at a line speed of 100 m / min, and the outer diameter of the molten aluminum plated steel wire is measured over the entire length of the molten aluminum plated steel wire. The presence or absence of a convex portion having a locally increased outer diameter was examined. It was visually observed whether or not the aluminum lump was attached to the convex portion having a locally large outer diameter, and the adhesion of the aluminum lump was evaluated based on the following evaluation criteria. The outer diameter of the hot-dip aluminized steel wire was measured using an optical outer diameter measuring instrument [manufactured by Keyence Corporation, product number: LS-7000].
  • the cross section of the hot-dip aluminized steel wire was observed. More specifically, a 300 mm test specimen was arbitrarily cut out from a hot-dip aluminized steel wire, and after six test pieces were further cut out from the test specimen, the test specimen was embedded in a resin and embedded. By cutting the resin and polishing the cut surface, the cross section of the hot-dip aluminized steel wire was exposed. This cross section was observed with an optical microscope (magnification: 500 times), and the minimum thickness of the thin portion of the plating film was measured. Of the minimum thicknesses of the thin portions of the plating film measured for the six test pieces, the smallest thickness was defined as the minimum thickness of the thin portion of the plating film.
  • the hot-dip aluminized steel wire obtained by the production method of the present invention can be suitably used for, for example, an automobile wire harness.

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PCT/JP2017/013474 2016-03-31 2017-03-30 溶融アルミニウムめっき鋼線の製造方法 WO2017170967A1 (ja)

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CN201780017399.6A CN108779543A (zh) 2016-03-31 2017-03-30 热浸镀铝钢线的制造方法
EP17775500.6A EP3438318A4 (en) 2016-03-31 2017-03-30 PROCESS FOR PRODUCING LIQUID ALUMINUM PLATED STEEL WIRE
US16/088,469 US20190136359A1 (en) 2016-03-31 2017-03-30 Method for producing hot dip aluminum-coated steel wire

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JP2017186668A (ja) 2017-10-12
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