KR20170016617A - Wrought iron tape for anti-rodent and electromagnetic wave shielding and method for manufacturing the same - Google Patents

Wrought iron tape for anti-rodent and electromagnetic wave shielding and method for manufacturing the same Download PDF

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Publication number
KR20170016617A
KR20170016617A KR1020150109925A KR20150109925A KR20170016617A KR 20170016617 A KR20170016617 A KR 20170016617A KR 1020150109925 A KR1020150109925 A KR 1020150109925A KR 20150109925 A KR20150109925 A KR 20150109925A KR 20170016617 A KR20170016617 A KR 20170016617A
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South Korea
Prior art keywords
soft
rolled
foil
heat treatment
soft iron
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KR1020150109925A
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Korean (ko)
Inventor
박광원
육종현
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가온전선 주식회사
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Priority to KR1020150109925A priority Critical patent/KR20170016617A/en
Publication of KR20170016617A publication Critical patent/KR20170016617A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • H01B13/262—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of an outer metallic screen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/04—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs
    • B23D19/06—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C23C2/34—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
    • C23C2/40—Plates; Strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding

Abstract

The present invention relates to a method of manufacturing a soft iron tape for electromagnetic wave shielding and electromagnetic wave shielding, and more particularly, to a method of manufacturing a soft iron tape for electromagnetic wave shielding and electromagnetic wave shielding with improved electromagnetic wave shielding performance and corrosion resistance.
Specifically, the present invention relates to a method of manufacturing a rolled steel sheet, comprising: a rolling step of repeatedly rolling a 0.25T * 200W soft rolled sheet material to have a thickness of 0.07T in a four-stage multi- A heat treatment step of heat treating the soft rolled steel foil in a continuous heat treatment furnace in a non-oxidizing atmosphere so that the hardness of the soft rolled foil becomes 80 to 120 Hv; And a plating step of transferring the soft rolled steel foil to the plating chamber to deposit the soft iron rolled foil with zinc.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrought iron tape for electromagnetic shielding and electromagnetic wave shielding,

The present invention relates to a wrought iron tape for electromagnetic wave shielding and electromagnetic wave shielding, and more particularly, to a wrought iron tape for electromagnetic wave shielding and a method of manufacturing the wrought iron tape with improved rubbing performance, electromagnetic wave shielding performance and corrosion resistance.

A cable is usually bundled with one or more wires or optical fibers in a protective sheath or enclosure. Each wire or fiber in the sheath is covered or insulated. The wires are usually copper due to their excellent conductivity, but aluminum is sometimes used to reduce the value. Electric wires require low electrical resistance and traction strength. Therefore, there are many cases in which a copper wire with a length of about 5 mm is folded a few to several tens of times, or a steel core aluminum wire with a steel wire twisted around the central portion and an aluminum wire is used around the wire. In the high-voltage transmission line of 275,000 V, the double-conductor system in which a plurality of such conductors are again bundled is mainstream. The above cables are used for power cables and control cables in the information and communication fields In the case of a dual control cable, a copper tape or an aluminum tape is coated to prevent noise from being generated in an electric signal in the cable due to an electromagnetic wave and static electricity generated from the outside.

However, our country is wintering in the winter in troughs with cables due to the seasonal climate conditions. Rats use cable, which is the only material around to make teeth, essential for survival, so that the damage of the cable is more severe and the damage of the important signal cable of the railway section occurs in a large area and there are serious difficulties in maintenance There is a possibility of causing serious accidents.

As a result, iron (steel strip: thickness 0.25 ~ 0.8 mm) was applied as a reinforcing layer for the wire, but the steel tape had high elasticity, which made it difficult to tap on the cable core wire.

In addition, cables for protecting cables from rodents such as mice have been developed. According to Korean Patent No. 10-865753, although a cover portion containing a rodent repellent agent is provided on an outermost layer of a cable to block the approach of a rodent, there is a problem that the concentration of the rodent repellent agent decreases over time,

Accordingly, there has been developed a technique of protecting a wire from a rodent by covering a cable with a steel tape. However, since the strength of the steel tape is excellent, the flexibility is low and the cable is difficult to install. There were difficulties such as not.

In addition, the iron tape according to the prior art has a tin plating layer on its surface to prevent oxidation of the iron tape.

However, as for the manufacturing process of the iron tape according to the conventional technique, the iron plate is subjected to the rolling process, then the heat treatment process, then the tin plating process, and then the slitting process with the respective tapes.

According to the manufacturing process of the iron tape according to the related art, there is a problem that the side surface of each of the tapes is not formed and the side surface of the iron tape body is exposed to the outside or the air, There has been a problem that the oxidation initiated from the side of the steel tape body is rapidly diffused to the inside of the steel tape body. As a result, there has been a problem that the iron tape according to the prior art has a considerably low corrosion resistance.

The contents of the background art described above are technical information that the inventor of the present application holds for the derivation of the present invention or acquired in the derivation process of the present invention, I can not.

Accordingly, it is an object of the present invention to provide a method of manufacturing a soft iron tape and a soft iron tape capable of solving the problems of the prior art.

Specifically, the object of the present invention is to provide a method of manufacturing a soft iron tape and a soft iron tape with improved corrosion resistance, hardness, tensile strength and elongation.

According to one embodiment of the present invention for solving the above-mentioned problems, the present invention relates to a method for producing a soft rolled steel sheet, comprising the steps of repeatedly rolling a 0.25T * 200W soft rolled sheet material in a four- ; A heat treatment step of heat treating the soft rolled steel foil in a continuous heat treatment furnace in a non-oxidizing atmosphere so that the hardness of the soft rolled foil becomes 80 to 120 Hv; And a plating step of transferring the soft iron rolled foil to the plating chamber and plating the soft iron rolled foil with zinc.

Preferably, the heat treatment step is carried out such that the temperature of the continuous heat treatment furnace is 800 ° C. to 1100 ° C. and the feeding speed of the soft iron rolling foil is 10 m / min to 20 m / min in the continuous heat treatment furnace .

Preferably, the heat treatment step is performed to supply an inert gas into the continuous heat treatment furnace to maintain a non-oxidizing atmosphere.

Preferably, the method further comprises a slitting step of passing the soft iron rolled foil through a slitter and dividing the rolled rolled foil into a plurality of unit rolled foils having a predetermined width, wherein the slitting step comprises the steps of: After the heat treatment step and before the plating step.

Also, preferably, the slitting step is performed in a slitting chamber in which the slitter is provided, and the silencing chamber is provided with inert gas inside the slitting chamber during the slitting step, And the atmosphere is maintained.

Preferably, the plating step is performed such that zinc is plated on the entire surface of the unit rolled foil.

Preferably, the plating chamber and the slitting chamber are connected by a connection portion in which an inert gas is supplied to the inside of the plating chamber and the non-oxidizing atmosphere is maintained.

According to another embodiment of the present invention, there is provided a method of manufacturing a soft rolled steel sheet, comprising the steps of repeatedly rolling a 0.25T * 200W soft rolled steel sheet material into a four-stage multi-stage rolling mill so as to have a thickness of 0.07T, And the rolled foil is subjected to heat treatment in a continuous heat treatment furnace in a non-oxidizing atmosphere so as to have a hardness of 80 - 120 Hv and then galvanized.

Preferably, the soft rolled steel foil is slit-processed by a plurality of unit rolled foils having a constant width, and then each of the plurality of unit rolled foils is galvanized simultaneously or sequentially.

Preferably, the unit rolled foil is galvanized on the entire surface and wound on a reel.

According to the means for solving the above-mentioned problems, the present invention can improve the corrosion resistance of the soft iron tape.

Further, the present invention can improve the tensile strength and hardness of the wrought iron tape, thereby reducing the breaking performance, the cable protection performance from the external impact, and the disconnection and scratching of the wrought iron tape during taping work of winding the wrought iron tape on the cable So that taping work can be performed more efficiently and easily.

Further, the present invention can improve ease of taping work of winding a soft iron tape on a cable by increasing the elongation rate, and after the taping work, the soft iron tape is kept in a wound state, so taping stability can be ensured.

1 is a schematic block diagram of an apparatus for producing a wrought iron tape according to an embodiment of the present invention.
Fig. 2 is a schematic view schematically showing a four-stage rolling machine for rolling a 0.25 T soft rolled plate to a 0.07 T soft iron roll foil.
3 is a schematic flow chart of a method of manufacturing a soft iron tape according to an embodiment of the present invention.
FIG. 4A is a schematic cross-sectional view of a wrought iron tape according to the prior art, and FIG. 4B is a schematic cross-sectional view of a wrought iron tape according to an embodiment of the present invention.
FIG. 5A is a neutral salt spray test (8 hours elapsed) test report on a wrought iron tape produced by a conventional method of producing a wrought iron tape, and FIG. This is a test report of neutral salt spray on tape (8 hours elapsed).
6A and 6B are experimental results showing the state of the soft iron tape at 10 hours and 24 hours after exposure of the soft iron tape produced by the method of the prior art to the neutral salt water.
7A and 7B are experimental results showing the state of the wrought iron tape at 10 hours and 24 hours after exposure of the soft iron tape manufactured by the method of manufacturing the soft iron tape according to the present invention to neutral saline.
8A is a tensile strength, elongation and surface hardness test report for a soft iron tape produced by a conventional method of producing a soft iron tape, and FIG. 8B is a graph showing the tensile strength, elongation and surface hardness of a soft iron tape manufactured by the method of the present invention Tensile strength, elongation and surface hardness test report.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are to be enlarged or reduced or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 1 is a schematic block diagram of an apparatus 1000 for manufacturing a wrought iron tape according to an embodiment of the present invention, and FIG. 2 is a schematic view of a four-stage mill rolling a 0.25 T soft rolled plate to a 0.07 T soft rolled steel foil Fig. 4 is a schematic cross-sectional view of a wrought iron tape according to the prior art, and Fig. 4B is a schematic cross-sectional view of a wrought iron tape according to an embodiment of the present invention. 5A is a neutral salt spray test (8 hours elapsed) test report on a soft iron tape produced by a conventional method of producing a soft iron tape according to an embodiment of the present invention And FIG. 5B is a neutral salt spray test (8 hours elapsed) test report on a soft iron tape produced by the method of manufacturing a soft iron tape according to the present invention, and FIGS. 6A and 6B are cross- 7a and 7b show experimental results showing the state of the wrought iron tape at 10 hours and 24 hours after exposing the wrought iron tape produced by the method of manufacturing the wrought iron to the neutral brine. FIG. 8A is a graph showing the results of experiments showing the state of the wrought iron tape at 10 hours and 24 hours after exposure of the wrought iron tape manufactured by the method of the present invention to neutral brine, Strength, elongation and surface hardness test report, and FIG. 8B is a tensile strength, elongation and surface hardness test report for a soft iron tape produced by the method of manufacturing a soft iron tape according to the present invention.

1, an apparatus 1000 for manufacturing a wrought iron tape according to an embodiment of the present invention includes a multi-stage rolling mill 100, a continuous heat treatment furnace 200, a slitting chamber 300, And a chamber (400).

As shown in FIGS. 1 and 2, the multi-stage rolling mill 100 is a four-stage rolling mill in which a soft iron rolled sheet material of 0.25T * 200W as a base material is rolled a plurality of times and finally subjected to a cold rolling .

The continuous heat treatment furnace 200 is configured to continuously heat-treat the soft iron rolled foil of 0.07T, and the soft iron heating furnace significantly reduces the work stress and elasticity inherent in the soft iron rolled foil by the rolling process of the four- .

The slitting chamber 300 is configured to isolate the outer air or the outside from the soft iron rolling foil in the slitting chamber 300. The slitting chamber 300 is configured to separate the soft iron rolling foil from the plurality of unit rolling foils 300, And includes a slitter for shearing or slitting the workpiece.

The plating chamber 400 is configured to isolate the outside air or the outside from the soft iron rolled foil or the unit rolling foil in the plating chamber 400. The plating chamber 400 includes a plating bath ).

4, the soft iron rolled foil or the unit rolled foil is quenched into a zinc solution so that the entire surface of the soft rolled steel foil or the unit rolled foil (i.e., the upper and lower surfaces and the both side surfaces and the end surface) Is plated with a zinc plating layer.

At least one of the multi-stage rolling mill 100, the continuous heat treatment furnace 200, the slitting chamber 300, and the plating chamber 400 is connected to a connection portion. Particularly, the slitting chamber 300 and the plating chamber 400 are connected to each other by a connecting portion 310 so that a plurality of unit rolling foils slit-processed in the slitting chamber 300 are not exposed to the outside air or the outside, An inert gas (for example, nitrogen gas, argon gas, or the like) may be supplied or filled in the connection part 310 to maintain the non-oxidizing atmosphere.

Hereinafter, a method of manufacturing a wrought iron tape according to an embodiment of the present invention using the apparatus 1000 for manufacturing a wrought iron tape according to an embodiment of the present invention will be described in more detail.

3, a method (S1000) for manufacturing a wrought iron tape according to an embodiment of the present invention includes a rolling step S1100, a heat treatment step S1200, a slitting step S1300, and a plating step S1400. Respectively.

The respective steps included in the method of manufacturing a soft iron tape (S1000) according to an embodiment of the present invention will be described in detail as follows.

1. In the rolling step (S1100)

First, a 0.25T * 200W soft iron rolled plate material having a thickness of 0.25T is put into a four-stage multi-stage rolling mill shown in Fig. 2 and cold rolled repeatedly at a reduction rate of 10 - 38%.

Through such a repeated cold rolling process, the soft iron rolled plate 1 having a thickness of 0.25 T is formed of a soft iron rolled foil having a thickness of 0.07T. More specifically, a plurality of cold rolling processes are repeatedly performed by repeatedly cold-rolling a 0.25T soft rolled plate (1) at a reduction ratio of 10 - 38% to produce 0.25T (1), 0.16T (2) To 0.07 T (2 ') - > 0.08 T (1 ") - 0.07 T (2") thick to finally obtain a 0.07 T soft iron rolled foil.

For reference, in the above, T is an abbreviation of Thickness. It is a unit commonly used to display the thickness of a steel plate. Typically, 1T means 1 mm. W is an abbreviation of Width. Typically, 1 W means 1 mm.

2. Heat treatment step (S1200)

Then, the rolled soft rolled steel foil is transferred to a conventional non-oxidizing continuous heat treatment furnace 200 equipped with an uncoiler, a combination of center position control (CPC), and a rewinder.

In the continuous heat treatment furnace 200, an inert gas (for example, nitrogen gas, argon gas or the like) is supplied or filled therein to maintain a non-oxidizing atmosphere.

For example, the inside of the continuous heat treatment furnace 200 is supplied with 0.1 to 10% by volume of hydrogen and 90 to 99.9% by volume of nitrogen, or 100% of nitrogen is supplied to maintain the anoxic atmosphere.

Then, the continuous heat treatment furnace 200 is conveyed at a conveying speed of 10 m / min to 20 m / min at a conveying speed of 10 m / min to 20 m / min while maintaining a temperature of 800 to 1100 ° C., A soft iron rolled foil of 120 Hv (based on a load of 0.5 kg) is obtained.

Preferably, the continuous heat treatment furnace 200 conveys the soft rolled steel foil at a conveying speed of 15 m / min while maintaining the temperature at 800 to 1100 ° C, and heat-treats the hardened rolled foil so that the hardness of the soft rolled foil is 92 Hv (See Fig. 8B).

Here, in the case where the hot-rolled steel sheet is heat-treated in a state where the temperature of the continuous heat-treating furnace 200 is lower than 800 ° C., the process stress and elasticity of the soft-rolled steel foil formed or increased in the rolling step are not significantly reduced, There is a problem that the soft iron tape is easily unwound from the outer circumferential surface of the cable during the taping operation of the soft iron tape on the outer circumferential surface of the cable so that the taping work of the operator is very difficult. The hardness, tensile strength and elongation of the soft rolled steel foil are drastically reduced when the temperature of the soft rolled steel foil is more than 1100 ° C. As a result, when the soft iron tape is taped to the outer circumferential surface of the cable, (Scratches, etc.) can easily occur. At the same time, Ability was confirmed that there is a problem that is very poor. Therefore, the soft iron tape according to the present invention is subjected to the continuous heat treatment at 800 to 1100 占 폚 so that the soft iron tape according to the present invention has a high hardness (80 to 120 Hv (based on a load of 0.5 kg)) and a high tensile strength ( (20 to 30%) and low elasticity (see FIG. 8B) while having a tensile strength of 300 to 370 N / mm 2 .

Thus, the soft iron tape according to the present invention can have improved rubbing performance and mechanical durability, while improving ease of taping work by the operator.

Also, when heat treatment is performed in a non-continuous heat treatment furnace (Bell furnace), a soft iron thin plate having a hardness of about 70 Hv can be obtained. However, since the soft iron thin plates adhere to each other during heat treatment, The present invention can prevent the occurrence of a sticking phenomenon by using the continuous heat treatment furnace 200.

3. Slitting step (S1300)

Thereafter, the soft iron sheet is passed through the slitting chamber 300 and the slitter, and is divided into a plurality of unit rolling foils having a predetermined width. That is, the soft rolled steel foil is sheared or slit processed into a plurality of unit rolled foils by using the slitter.

Here, each of the unit rolled sheets is wound on a reel after the subsequent plating step, and is finally made of a single soft iron tape.

The slitting step is performed in a slitting chamber 300 in which the slitter is provided, and the silting chamber is provided with inert gas inside the slitting chamber 300 during the slitting step, Maintain a warm atmosphere. As a result, the unit rolled foil is not oxidized during the slitting step.

According to the present invention, the slitting step is performed after the heat treatment step and before the plating step. Thus, the soft-iron tape finally produced by the method of producing a soft-iron tape according to the present invention is formed on the entire surface of the soft-iron tape as shown in FIG. 4B, specifically, the upper and lower surfaces, and the slitting surface And the zinc plating layer is formed on the entire side surface of the end portion, the soft iron tape main body portion (that is, the soft iron portion) can be completely cut off from contact with oxygen, so that the corrosion resistance of the soft iron tape can be remarkably improved.

4. Plating step (S1400)

After completing the slitting step, the soft rolled steel foil or the unit rolled foil is quenched in a zinc solution for 0.2 to 10 seconds to prepare a soft iron tape coated with a zinc plating layer with a thickness of 0.5 to 2.0 탆. By providing the zinc plated layer in which a pin hole is much smaller than the tin plating layer, the soft iron tape according to the present invention can improve the corrosion resistance.

Also, preferably, the plating chamber and the slitting chamber 300 may be connected to each other by a connection part 310 through which an inert gas is supplied to maintain a non-oxidizing atmosphere therein. Thus, it is possible to prevent the surface of the wrought iron tape from being oxidized before the plating step.

The performance of the wrought iron tape finally produced by the method of manufacturing a wrought iron tape according to one embodiment of the present invention will be described in detail below with reference to a test report or in comparison with the prior art.

In the conventional technique, a 0.1T soft iron rolled foil formed by multi-stage rolling is subjected to a heat treatment process in an oxygen-free atmosphere, followed by coating with a tin solution on a heat-treated soft iron tape and then subjected to a slitting process. .

(1) Corrosion resistance

FIG. 4A is a schematic cross-sectional view of a wrought iron tape according to the prior art, FIG. 4B is a schematic cross-sectional view of a wrought iron tape according to an embodiment of the present invention, (8 hours elapsed) test report on the manufactured wrought iron tape, and Fig. 5b shows the test result of the neutral salt spray test (8 hours elapsed) on the wrought iron tape produced by the method of producing the wrought iron tape according to the present invention 6A and 6B are experimental results showing the state of the soft iron tape at 10 hours and 24 hours after exposure of the soft iron tape produced by the method of manufacturing the soft iron tape according to the prior art to the neutral salt water, 7B is a view showing the state of the soft iron tape when the soft iron tape produced by the method of manufacturing the soft iron tape according to the present invention has been exposed to neutral saline water for 10 hours and 24 hours, This is a test result.

As shown in Figs. 4A and 4B, the wrought iron tape T1 according to the prior art has a tin plating layer only on the upper surface SC and the lower surface SC of the wrought iron tape main body I, The wrought iron tape T2 according to the present embodiment has a zinc plating layer not only on the upper face C1 and the lower face C1 but also on the slitting face C2 The entire surface of the soft iron tape body is also protected by the zinc plated layer.

As shown in FIGS. 5A and 5B, after 8 hours from the test of the neutral salt spray test on the wrought iron tape according to the prior art and the wrought iron tape according to the present invention, the wrought iron tape according to the prior art showed a rust (I.e., iron oxide) is generated. On the other hand, the soft-iron tape according to the present invention can be confirmed that there is no abnormality on the surface of the soft-iron tape.

As shown in FIGS. 6A to 6D, the wrought iron tape according to the prior art and the wrought iron tape according to the present invention were examined for 10 hours or 24 hours after exposure to neutral saline, It can be seen that the rust-preventive tape according to the present invention has no abnormality on the surface of the soft-iron tape, whereas the rust-preventive tape according to the present invention can confirm that the rust (iron oxide) generated on the side gradually propagates to the inside of the soft- have.

Therefore, it can be confirmed that the corrosion resistance of the soft iron tape according to the present invention is remarkably improved as compared with the prior art.

(2) Mechanical properties (tensile strength, elongation, hardness)

8A is a tensile strength, elongation and surface hardness test report for a soft iron tape produced by a conventional method of producing a soft iron tape, and FIG. 8B is a graph showing the tensile strength, elongation and surface hardness of a soft iron tape manufactured by the method of the present invention Tensile strength, elongation and surface hardness test report.

The base material of the wrought iron tape according to the prior art and the base material of the wrought iron tape according to the present invention are made of wrought iron and the coating layer of the wrought iron tape according to the prior art is a tin coating layer, Coating layer or a zinc-iron alloy coating (or plating) layer.

As shown in FIGS. 8A and 8B, according to a test report on tensile strength and elongation of a wrought iron tape according to the prior art and a wrought iron tape according to the present invention, mm 2 and an elongation of 14%, while the soft iron tape according to the present invention at 0.07 T has a tensile strength of 348 N / mm 2 and an elongation of 26%. That is, the wrought iron tape according to the present invention has a significantly increased tensile strength and elongation as compared with the wrought iron tape according to the prior art.

As shown in FIGS. 8A and 8B, according to the test report on the hardness of the wrought iron tape according to the prior art and the wrought iron tape according to the present invention, the wrought iron tape according to the prior art of 0.1T has a load of 53 Hv 0.5 kg), while the soft iron tape according to the present invention at 0.07 T has a hardness of 92 Hv (based on a load of 0.5 kg). That is, it can be confirmed that the hardness of the soft-iron tape according to the present invention is remarkably increased as compared with the soft-iron tape according to the prior art.

As described above, the present invention can improve the corrosion resistance of the wrought iron tape.

Further, the present invention can improve the tensile strength and hardness of the wrought iron tape, thereby reducing the breaking performance, the cable protection performance from the external impact, and the disconnection and scratching of the wrought iron tape during taping work of winding the wrought iron tape on the cable So that taping work can be performed more efficiently and easily.

Further, the present invention can improve ease of taping work of winding a soft iron tape on a cable by increasing the elongation rate, and after the taping work, the soft iron tape is kept in a wound state, so taping stability can be ensured.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And the like. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

1000: Production equipment of soft iron tape
100: Multistage rolling mill
200: Continuous heat treatment furnace
300: Slitting chamber
400: plating chamber

Claims (10)

A rolling step of repeatedly rolling a 0.25T * 200W soft iron rolled plate material so as to have a thickness of 0.07T in a four-stage multi-stage rolling machine and processing it into a soft iron rolled foil;
A heat treatment step of heat treating the soft rolled steel foil in a continuous heat treatment furnace in a non-oxidizing atmosphere so that the hardness of the soft rolled foil becomes 80 to 120 Hv;
And a plating step of transferring the soft rolled steel foil to a plating chamber to deposit the soft iron rolled foil with zinc. The method according to claim 1,
The heat treatment step may include:
Wherein the temperature of the continuous heat treatment furnace is 800 占 폚 to 1100 占 폚 and the feeding speed of the soft iron rolling foil is 10 m / min to 20 m / min in the continuous heat treatment furnace. The method according to claim 1,
The heat treatment step may include:
Wherein an inert gas is supplied into the continuous heat treatment furnace to maintain a non-oxidizing atmosphere. The method according to claim 1,
The method for producing a soft iron tape includes:
And a slitting step of passing the soft iron rolled foil through a slitter and dividing the rolled rolled foil into a plurality of unit rolled foils having a predetermined width,
Wherein the slitting step is performed after the heat treatment step and before the plating step. 5. The method of claim 4,
Wherein the slitting step is performed in a slitting chamber in which the slitter is provided,
Wherein the silting chamber is supplied with inert gas inside the slitting chamber during the slitting step to maintain a non-oxidizing atmosphere. 5. The method of claim 4,
Wherein the plating step is performed so that zinc is plated on the entire surface of the unit rolling foil. 5. The method of claim 4,
Wherein the plating chamber and the slitting chamber are connected to each other by a connection portion in which an inert gas is supplied to maintain a non-oxidizing atmosphere therein. The soft rolled steel foil was repeatedly rolled to a thickness of 0.07 T in a four-stage multi-stage rolling mill of 0.25T * 200W to obtain a soft rolled steel foil. The soft rolled foil was subjected to continuous heat treatment in an oxygen- And then zinc-plated. 9. The method of claim 8,
Wherein the soft rolled steel foil is slit processed by a plurality of unit rolled foils having a predetermined width and then each of the plurality of unit rolled foils is galvanized simultaneously or sequentially. 10. The method of claim 9,
Wherein the entire surface of the unit rolled foil is galvanized and wound on a reel.
KR1020150109925A 2015-08-04 2015-08-04 Wrought iron tape for anti-rodent and electromagnetic wave shielding and method for manufacturing the same KR20170016617A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107565482A (en) * 2017-08-25 2018-01-09 江西电力职业技术学院 Electric power facility

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107565482A (en) * 2017-08-25 2018-01-09 江西电力职业技术学院 Electric power facility

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