KR20150083935A - Manufacturing device and method for soft magnetic metal strips - Google Patents

Manufacturing device and method for soft magnetic metal strips Download PDF

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Publication number
KR20150083935A
KR20150083935A KR1020130164627A KR20130164627A KR20150083935A KR 20150083935 A KR20150083935 A KR 20150083935A KR 1020130164627 A KR1020130164627 A KR 1020130164627A KR 20130164627 A KR20130164627 A KR 20130164627A KR 20150083935 A KR20150083935 A KR 20150083935A
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KR
South Korea
Prior art keywords
cooling roll
molten steel
metal plate
magnetic body
thin metal
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Application number
KR1020130164627A
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Korean (ko)
Inventor
남궁정
최진태
도병무
Original Assignee
재단법인 포항산업과학연구원
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Priority to KR1020130164627A priority Critical patent/KR20150083935A/en
Publication of KR20150083935A publication Critical patent/KR20150083935A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

The present invention provides a device and a method for manufacturing soft magnetic metal strips to prevent the contamination of a cooling roll, damage to the surface of the cooling roll, the early separation of a metal plate. The device for manufacturing soft magnetic metal strips includes: a molten metal injection part to inject molten metal; the cooling roll which receives the molten metal from the molten metal injection part to rapidly cool and solidify the molten metal on the surface in order to make the molten metal into a metal plate by rotating at high speed; a first magnetic body fixated to the inside of the cooling roll to apply a magnetic force to the metal plate from a first position for injecting molten metal to a second position for separating the metal plate in order to make the metal plate adhere to the surface of the cooling roll; and a guide roller placed next to the cooling roll to receive and transfer the metal plate separated in the second position.

Description

TECHNICAL FIELD [0001] The present invention relates to a soft magnetic metal strip manufacturing apparatus and a manufacturing method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft metal strip manufacturing technique, and more particularly, to a soft metal strip manufacturing apparatus and a manufacturing method using a rapid solidification casting process.

There is a planar flow casting (PFC) process developed by Narasimhan in 1979 as a rapid solidification casting process for producing metal strips. In this process, molten steel is sprayed onto the surface of a cooling roll rotating at a high speed and rapidly cooled. When the amorphous phase is completely formed, the liquid is fixed in a wetted state with little change in the density of the liquid phase and the solid phase to form a thin metal plate.

The thin metal plate on the cooling roll maintains adhesion which does not cause separation due to natural conditions such as centrifugal force or air friction of the cooling roll and deliberate peeling is required. In order to produce the metal strip, the metal foil must be separated continuously at a specific location on the rotating cooling roll surface.

Conventionally, a mechanical method of spraying a high-pressure fluid or using a peeling blade has been used to separate a thin metal plate from a cooling roll. However, in this case, the surface of the cooling roll may be contaminated by the impurities contained in the injection fluid, and if the process conditions are unstable or vibration occurs, the peeling blade may cause scratches on the surface of the cooling roll, have.

On the other hand, in the case of a crystalline alloy or pure metal in which the molten steel solidified on the surface of the cooling roll does not form an amorphous phase completely, stress is generated due to the shrinkage phenomenon caused by the density change between the liquid phase and the solid phase during the quenching and solidification process, do. In this case, effective cooling is not achieved and the process failure occurs due to premature peeling, so the close contact between the thin metal plate and the cooling roll must be maintained until the intended separation.

The present invention relates to a soft metal strip manufacturing apparatus capable of precisely separating a thin metal plate on a cooling roll without causing contamination or scratching of the cooling roll and preventing the early stripping of the thin metal plate, And a manufacturing method thereof.

The apparatus for manufacturing a soft metal strip according to an embodiment of the present invention includes a molten steel spraying portion for spraying molten steel, a cooling roll for rotating the molten steel at high speed and being supplied with molten steel from the molten steel spraying portion, A first magnetic body placed in a fixed state inside the cooling roll and applying a magnetic force to the thin metal plate from the first position where the molten steel is injected to the second position where the thin metal plate is separated to adhere the thin metal plate to the surface of the cooling roll, And a guide roller for receiving and transporting the thin metal plate separated from the second position.

The molten steel injection unit may include a tundish for storing molten steel and forming a molten steel at the bottom center, a stopper for selectively opening and closing the molten steel, and a nozzle for spraying molten steel at a lower end of the tundish.

The first position may be the upper end of the cooling roll, and the second position may be either the right end or the left end of the cooling roll. The metal foil can be brought into contact with approximately 3/4 of the surface of the cooling roll by the first magnetic body.

The soft magnetic metal strip manufacturing apparatus may further include a second magnetic body positioned in a fixed state inside the guide roller. The second magnetic body may be installed in a range between a third position parallel to the second position and a fourth position about 90 degrees away from the third position. The first magnetic body and the second magnetic body may be composed of a permanent magnet or an electromagnet, and may have a magnetic force of 500 Gauss to 10,000 Gauss.

A method of manufacturing a soft metal strip according to an embodiment of the present invention includes the steps of injecting molten steel onto the surface of a rotating cooling roll, forming a thin metal plate by rapid solidification of molten steel on the surface of the cooling roll, Attaching a metal thin plate to a surface of a cooling roll from a first position at which molten steel is injected to a second position at which the metal thin plate is separated by using a first magnetic body installed in the first position, And moving the sheet by the roller.

The second magnetic body may be positioned inside the guide roller and the thin metal plate separated at the second position by the centrifugal force may be moved to the surface of the guide roller by the second magnetic body.

According to this embodiment, the metal thin plate can be separated by the guide roller and the second magnetic body without using the air knife or the peeling blade at the position where the thin metal plate is desired to be intensified at the desired position. Therefore, it is possible to prevent the contamination of the cooling roll, the surface damage and the early peeling of the thin metal plate, and the continuous process for manufacturing the soft magnetic metal strip can be stably performed.

FIG. 1 is a block diagram showing an apparatus for manufacturing a soft magnetic metal strip according to an embodiment of the present invention.
2 is a process flow diagram illustrating a method of manufacturing a soft magnetic metal strip according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

FIG. 1 is a block diagram showing an apparatus for manufacturing a soft magnetic metal strip according to an embodiment of the present invention.

1, the apparatus 100 for manufacturing a soft magnetic metal strip of the present embodiment includes a rotating cooling roll 10, a molten steel spraying section 20 for spraying molten steel 1 toward the cooling roll 10, A first magnetic body 30 positioned in a fixed state inside the cooling roll 10, a guide roller 40 disposed adjacent to the cooling roll 10, and a second magnetic body 30 fixed in the guide roller 40 And a two-magnetic body 50.

The cooling roll 10 is made of a metal, for example a copper alloy, and rotates at a high speed of about 20 to 40 m / s during the manufacture of the soft magnetic metal strip. The cooling roll 10 is maintained in a cooled state in such a manner that a cooling fluid is supplied to the inside of the cooling roll 10, and the molten steel is rapidly solidified on the surface thereof to form a thin metal plate 2. [

The molten steel injection portion 20 includes a tundish 22 for storing the molten steel 1 and forming a tundish 21 at the bottom center, a stopper 23 for selectively opening and closing the tundish 21, And a nozzle 24 provided at the lower end of the nozzle 22. When the stopper 23 opens the tundish 21, the molten steel 1 in the tundish 22 flows into the nozzle 24 through the tundish 21 and the molten steel 1 Is injected onto the surface of the cooling roll 10 through the tip of the nozzle 24 in close proximity to the surface of the rotating cooling roll 10.

At this time, the thin metal plate 2 is a soft magnetic thin metal plate and is cooled below the Curie temperature at the surface of the cooling roll 10. The first magnetic body 30 maintains a fixed position inside the cooling roll 10 regardless of the rotation of the cooling roll 10. [

A position where the molten steel 1 is injected from the surface of the cooling roll 10 is referred to as a first position P1 and a position where the thin metal plate 2 is separated is referred to as a second position P2. The first magnetic body 30 is provided in a range from the first position P1 to the second position P2 and the magnetic thin plate 2 is applied to the cooling roll 10 by applying magnetic force to the thin metal plate 2 in this range. Keep the attached state without detaching from the surface.

The first position P1 may be the uppermost position of the cooling roll 10 and the second position P2 may be positioned at a position away from the first position P1 by approximately 270 degrees along the circumferential direction of the cooling roll 10. [ . 1, the cooling roll 10 rotates in the counterclockwise direction and the second position P2 is the right end of the cooling roll 10. However, the position of the second position P2 is not limited to that shown in FIG. But is not limited to an example. The metal foil 2 can be in contact with approximately 3/4 of the surface of the cooling roll 10.

The molten steel 1 injected forms a solidified shell in contact with the surface of the cooling roll 10, and the solidified shell determines the thickness of the metal strip to be produced. The metal foil 2 is in a high temperature state of several hundreds of degrees Celsius immediately after the formation of the solidification shell and needs to maintain an effective cooling state by the cooling roll 10 in contact with the surface of the cooling roll 10 for a certain period of time.

The adhesion state of the surface of the cooling roll 10 and the thin metal plate 2 is achieved by overcoming the centrifugal force due to the high-speed rotation of the cooling roll 10 and the deviation due to the frictional resistance with the surrounding air if the solidified thin plate is in an amorphous state, However, when the solidified metal foil 2 becomes a partially crystalline phase or a completely crystalline phase, shrinkage stress is generated in the solidification shell forming step and the cooling step and is easily separated from the surface of the cooling roll 10 .

The soft magnetic metal thin plate 2 is attached to the cooling roll 10 from the first position P1 to the second position P2 by the first magnetic body 30 even if the soft magnetic metal thin plate 2 is partially crystalline or completely crystalline, A good attachment state can be maintained without releasing from the cooling roll 10 to the second position P2. Therefore, an effective cooling state by the cooling roll 10 can be maintained.

The guide rollers 40 are positioned in parallel with the cooling roll 10 outside the second position P2 of the cooling roll 10 and are provided with the thin metal plate 2 separated by the centrifugal force at the second position P2 Transfer. The second magnetic body 50 may be installed in a range between the third position P3 parallel to the second position P2 and the fourth position P4 substantially 90 degrees away from the third position P3, The mounting range can be expanded toward the cooling roll 10.

The second magnetic body 50 functions to attract the thin metal plate 2 separated at the second position P2 by the centrifugal force onto the guide roller 40. [ The thin metal plate 2 moved to the guide roller 40 by the second magnetic body 50 adheres to the surface of the guide roller 40 within the range of the magnetic force of the second magnetic body 50 and rotates, P4, and is free to fly.

The first magnetic body 30 and the second magnetic body 50 may be composed of a permanent magnet or an electromagnet. The permanent magnet may include any one of neodymium magnet, samarium magnet, alico magnet, and ferrite magnet, and may be formed in a block form or a sheet form. In the case of a permanent magnet, it is necessary to cool the permanent magnet to about 100 or less so as to prevent the temperature from rising due to heat input during the process.

The magnetic force strengths of the first magnetic body 30 and the second magnetic body 50 can range from 500 Gauss to 10,000 Gauss. If the magnetic force is less than 500 Gauss, the thin metal plate 2 may be detached by high-speed rotation of the cooling roll 10 and the guide roller 40. If the magnetic force exceeds 10,000 Gauss, the second position P2 or the fourth position P4 The thin metal plate 2 may not be correctly separated.

Since the magnetic line of force decreases in proportion to the square of the distance away from the source, the first magnetic body 30 and the second magnetic body 50 are approximately in contact with the surface of the cooling roll 10 and the surface of the guide roller 40 100 mm.

2 is a process flow diagram illustrating a method of manufacturing a soft magnetic metal strip according to an embodiment of the present invention.

1 and 2, a method of manufacturing a soft magnetic metal strip includes a first step (S10) of spraying molten steel (1) onto the surface of a rotating cooling roll (10) A second step S20 of forming a thin metal plate 2 by rapid solidification of the molten steel 1 and a second step S20 of heating the molten steel 1 by using the first magnetic body 30 provided inside the cooling roll 10, A third step S30 of attaching the thin metal plate 2 to the surface of the cooling roll 10 from the position P1 until the second position P2 where the thin metal plate 2 is separated and the second position P2 And a fourth step S40 of moving the thin metal plate 2 separated from the guide roller 40 to the guide roller 40. [

In the fourth step S40, the above-described second magnetic body 50 is positioned inside the guide roller 40 and the thin metal plate 2 separated from the second position P2 by the centrifugal force moves the second magnetic body 50, To the guide roller (40). The thin metal plate 2 moved to the guide roller 40 is attached to the surface of the guide roller 40 within the range of the magnetic force of the second magnetic body 50 and is rotated and then released by the centrifugal force.

As described above, in the present embodiment, the adhesion of the thin metal plate 2 is enhanced at the desired position, and the guide roller 40 and the second magnetic body 50 The thin metal plate 2 can be separated. Therefore, it is possible to prevent the contamination of the cooling roll 10, the surface damage and the early peeling of the thin metal plate 2, and the continuous process of manufacturing the soft magnetic metal strip can be stably performed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

100: soft magnetic metal strip manufacturing apparatus
1: molten steel 2: metal thin plate
10: cooling roll 20: molten steel injection part
30: first magnetic body 40: guide roller
50: second magnetic body

Claims (7)

A molten steel spraying portion for spraying molten steel;
A cooling roll which rotates at a high speed and receives molten steel from the molten steel injection part to rapidly quench and solidify the surface to form a thin metal plate;
A first magnetic body positioned in a fixed state inside the cooling roll and applying a magnetic force to the thin metal plate from the first position where the molten steel is injected to a second position where the thin metal plate is separated to closely contact the thin metal plate to the surface of the cooling roll; And
A guide roller disposed adjacent to the cooling roll and provided with a thin metal plate separated from the second position,
Magnetic metal strip. The method according to claim 1,
The molten steel injection unit includes a tundish for storing molten steel and forming a molten metal at a bottom center, a stopper for selectively opening and closing the molten steel, and a nozzle for spraying molten steel at a lower end of the tundish Device. The method according to claim 1,
Wherein the first position is the uppermost end of the cooling roll and the second position is either the right end or the left end of the cooling roll, Contacting soft magnetic metal strip. The method of claim 3,
And a second magnetic body positioned in a fixed state in the guide roller,
Wherein the second magnetic body is installed in a range between a third position in parallel with the second position and a fourth position in which the second magnetic body is separated from the third position by about 90 degrees. 5. The method of claim 4,
Wherein the first magnetic body and the second magnetic body are composed of a permanent magnet or an electromagnet, and have a magnetic force of 500 Gauss to 10,000 Gauss. Spraying molten steel onto the surface of the rotating cooling roll;
Rapidly cooling and solidifying the molten steel on the surface of the cooling roll to form a metal thin plate;
Attaching a thin metal plate to the surface of the cooling roll from a first position where the molten steel is injected to a second position where the thin metal plate is separated using the first magnetic body installed in the cooling roll;
Moving the thin metal plate separated from the second position to a guide roller and transporting
≪ / RTI > The method according to claim 6,
A second magnetic body is disposed inside the guide roller,
And the thin metal plate separated from the second position by centrifugal force is attached to the surface of the guide roller by the second magnetic body.
KR1020130164627A 2013-12-26 2013-12-26 Manufacturing device and method for soft magnetic metal strips KR20150083935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130164627A KR20150083935A (en) 2013-12-26 2013-12-26 Manufacturing device and method for soft magnetic metal strips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130164627A KR20150083935A (en) 2013-12-26 2013-12-26 Manufacturing device and method for soft magnetic metal strips

Publications (1)

Publication Number Publication Date
KR20150083935A true KR20150083935A (en) 2015-07-21

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