KR20140106802A - Forming apparatus for solid matter and analysis method for behavior of solid matter - Google Patents

Forming apparatus for solid matter and analysis method for behavior of solid matter Download PDF

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Publication number
KR20140106802A
KR20140106802A KR1020130020863A KR20130020863A KR20140106802A KR 20140106802 A KR20140106802 A KR 20140106802A KR 1020130020863 A KR1020130020863 A KR 1020130020863A KR 20130020863 A KR20130020863 A KR 20130020863A KR 20140106802 A KR20140106802 A KR 20140106802A
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South Korea
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inner member
melt
forming
product
solidified
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KR1020130020863A
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Korean (ko)
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고은이
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주식회사 포스코
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Publication of KR20140106802A publication Critical patent/KR20140106802A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20—Metals
    • G01N33/204—Structure thereof, e.g. crystal structure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0234—Metals, e.g. steel

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Continuous Casting (AREA)

Abstract

According to an embodiment of the present invention, a method for analyzing behavior of coagulation includes a step of preparing a molten material in a container; a step of submerging at least part of an apparatus for forming coagulation which includes an internal member and an external member covering at least part of the internal member in the molten material; a step of forming coagulation on a surface of the apparatus for forming coagulation by moving the external member downward; a step of discharging the molten material by moving the apparatus for forming coagulation upward; a step of separating the coagulation from the apparatus for forming coagulation; and a step of analyzing the coagulation. Therefore, the method for analyzing behavior of coagulation can easily analyze behavior of coagulation in a mold during a continuous casting process.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for analyzing the behavior of a solidification material forming apparatus and a solidification material,

The present invention relates to a solidification forming apparatus and a method for analyzing the behavior of a solidification product, and more particularly, to a solidification forming apparatus and a solidification forming apparatus capable of improving the reliability of a casting produced by analyzing the behavior of solidification products generated in a mold in a continuous casting process. And a method for analyzing the behavior of a solidified product.

Generally, a cast steel is produced by cooling molten steel accommodated in a mold through a cooling stand. For example, in the continuous casting process, a molten steel is injected into a mold having a predetermined internal shape, and a reaction product is continuously drawn in the mold to the lower side of the mold to produce semi-finished products having various shapes such as slabs, blooms, billets, beam blanks, Process.

In this continuous casting process, the cast steel is first cooled in the casting mold, and after passing through the casting mold, water is injected into the casting mold and the casting is secondarily cooled. Also, as shown in FIG. 1, the casted steel sheet drawn out from the casting mold is taken out in a vertical direction of a predetermined section, then passes through a banding process (bending process), and thereafter is converted into a horizontal direction (calibrated, unbending process) . At this time, when the casting direction of the cast steel is changed and the cast steel is deformed, that is, when the cast steel is subjected to bending and calibrating, tensile stress is applied in the casting length direction of the cast steel. Due to such a tensile stress, cracking occurs in the surface of the cast steel in the direction perpendicular to the casting longitudinal direction (casting width direction) at the casting temperature conditions of the cast steel (e.g., between 700 and 900 DEG C).

On the other hand, when the primary cooling progresses in the mold, the mold is vibrated for the smooth lubrication of the cast steel. Due to such vibration, a so-called oscillation mark (OM) is generated on the surface of the cast steel in a direction perpendicular to the casting direction. The oscillation mark OM has, for example, a depth of about 0.2 to 1.0 mm and a width of about 1 to 3 mm. When a stress is applied during casting, particularly during the casting bending or calibrating described above, such an oscillation mark (OM) acts as a position where stress concentrates, that is, acts as a notch effect, do. Most of the surface cracks in the casting are occurring in the oscillation mark (OM).

As such, the oscillation mark is directly related to the surface quality of the cast steel, and research on the initial forming mechanism is underway. However, since the specimen procurement is almost impossible in the process, indirect research is mainly conducted through simulation and the like.

In the past, in the laboratory, a small amount of specimen was melted by a static method, and the coagulation behavior was examined. The specimen was heated to a high temperature and subjected to a tensile test to investigate the strength at a high temperature. However, the results of the analysis through these tests are in a state in which the operating conditions such as the mold vibration are not reflected during the casting, and therefore, there is a problem that the reliability is deteriorated due to the distances from the actual casting process situation.

KR10-0989767B KR10-1076100B KR10-1224978B

The present invention provides a method for analyzing the behavior of a solidification product and a device for forming a solidification product capable of easily measuring the solidification behavior of a melt in a mold during a continuous casting process.

The present invention provides a coagulating material forming apparatus and a method for analyzing the behavior of a coagulating material which can suppress or prevent process defects caused by an oscillation mark of cast steel.

The present invention provides a coagulating material forming apparatus and a method for analyzing the behavior of a coagulating material capable of improving the quality of a casting produced.

A method for analyzing the behavior of a solidification product according to an embodiment of the present invention is a method for analyzing the behavior of a solidification product, comprising the steps of: preparing a melt in a container; Immersing at least a portion of an apparatus for forming a coagulum, comprising an inner member and an outer member surrounding at least a portion of the inner member, in the melt; Forming a solidified material on the surface of the solidified material forming apparatus by lowering the outer member; Withdrawing the coagulating material forming device from the melt by raising the coagulating material forming device; Separating the solidified material from the solidified material forming apparatus; And analyzing the solidified material.

The coagulating material forming apparatus can be vibrated in the process of forming the coagulated material.

The melt may comprise a first melt and a second melt injected onto the first melt.

The process of immersing at least a portion of the coagulum forming apparatus in the melt may damp at least the portion of the inner member enclosing the outer member in the first melt.

The process of immersing at least a portion of the coagulum-forming apparatus in the melt may be performed while detecting the surface of the second melt using a bubble detector.

And a step of disposing a plurality of the coagulating material forming devices in the upper part of the container before the process of immersing at least a part of the coagulating material forming device in the molten material.

The second melt may be introduced between the inner member and the solidification product in the course of vibrating the solidification device.

The plurality of coagulating material forming devices may be vibrated in the same size or different sizes in the process of vibrating the coagulating material forming device.

Wherein the plurality of coagulant-forming apparatuses form a plurality of coagulant-forming apparatuses, each of the coagulant-forming apparatuses comprising: a plurality of coagulant- It is possible to descend at a speed.

The process of analyzing the solidified product may analyze the surface shape of the solidified product contacting the inner member.

An apparatus for forming a solidification product by cooling a melt, comprising: an inner member having a flat surface on at least one side; An outer member provided on the outer side of the inner member and surrounding at least a part of the inner member; Driving means for moving the inner member and the outer member in the vertical direction; And a control unit for controlling operations of the vibration device and the driving means.

A flow path through which the coolant moves may be formed in the inner member.

The outer member may be formed to surround at least the lower portion of the inner member which is immersed in the melt.

The apparatus for forming the solidified material may be provided with a trough surface detector for sensing the trough surface of the molten material accommodated in the container.

And a vibrating device for vibrating the inner member.

The plurality of devices for forming the solidified material may be provided along the width direction or the length direction of the container.

The solidification forming apparatus and the method for analyzing the behavior of the solidification product according to the embodiment of the present invention can easily diagnose the solidification behavior of the melt in the mold during the continuous casting process. That is, the solidification behavior of the melt in the mold can be reproduced in the continuous casting process under the same conditions as the continuous casting process. Thus, the condition of the continuous casting process that can reduce defects that may occur in the cast steel can be set. Therefore, the produced cast steel can significantly improve the quality and productivity of the cast steel by significantly suppressing the cracks generated on the surface during casting. It is easy to analyze the influence of the process conditions such as the type of steel and casting conditions on the initial solidification of the melt and it is important to evaluate the casting condition because of the high reliability of the analysis result. It is possible.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a structure of a continuous casting apparatus. Fig.
2 is a schematic view of an apparatus for forming a solidification product according to an embodiment of the present invention.
3 is a view showing a structure of an inner member constituting the solidification forming apparatus shown in Fig.
4 is a view showing a structure of an outer member constituting the solidification forming apparatus shown in FIG. 2;
5 is a view showing an operation state of a solidification forming apparatus according to an embodiment of the present invention.
6 is a view showing a state in which a plurality of coagulating material forming apparatuses according to an embodiment of the present invention are installed.
7 is a flowchart showing a method for evaluating the behavior of a solidification product according to an embodiment of the present invention.
8 is a view showing a process of forming a solidification product for evaluating the behavior of solidification products according to an embodiment of the present invention.
9 is a graph showing a photograph of the solidification product formed by the embodiment of the present invention and a result of the surface analysis of the solidification product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for producing a cast steel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

1 is a view schematically showing the structure of a continuous casting apparatus.

With reference to Fig. 1, a general continuous casting apparatus as a cast steel casting apparatus will be described.

The continuous casting apparatus includes a ladle 10 containing molten steel refined in a steelmaking process, a tundish 20 for receiving molten steel through an injection nozzle connected to the ladle 10 and temporarily storing the molten steel, And a mold 30 for receiving molten steel stored in the dish 20 and performing initial solidification in a predetermined shape. A cooling line (not shown) is provided in the lower part of the mold 30 and in which a plurality of segments 50 are successively arranged so as to perform a series of molding operations while cooling the non-solidified casting 1 pulled from the mold 30 40). Here, the segment 50 includes an upper frame 53 and a lower frame 54 that are vertically spaced apart from each other, and a plurality of guide roll assemblies 100 are arranged to be opposed to the upper frame 53 and the lower frame 54 . The segment 50 is provided with a tie rod 56 for vertically connecting the upper frame 53 and the lower frame 54 in a state of being spaced apart from each other and a tie rod 56 for connecting the upper frame 53 And a hydraulic cylinder 55 that adjusts the distance between the lower frame 54 and the lower frame 54. [ The cast strip 1 pulled out of the mold 30 passes through a space between the upper frame 53 and the lower frame 54 and includes a guide roll assembly 100 and a bearing housing for rotatably supporting the guide roll And guided and pressed by a plurality of guide roll assemblies 100 to be formed into a predetermined shape. That is, a plurality of segments 50 are aligned and arranged in a direction crossing the direction in which the cast steel 1 moves, and the cast steel 1 passes between a plurality of guide roll assemblies 100 facing each other, (1) The guide rolls on both sides push down the cast steel.

In this process, molten steel is first cooled inside the mold 30, and the casting material drawn from the mold 30 is secondarily cooled while passing through the cooling line. When the molten steel is supplied to the mold, a flux, which is a subsidiary material, is also supplied to the mold. The flux lubricates the molten steel that is first cooled in the mold, that is, the main body, so as to easily escape from the mold. In addition, vibration of the mold is prevented by using a mold vibrating apparatus (not shown) to prevent the mold from being welded to the surface of the mold.

On the other hand, the flux is melted by molten steel to form a liquid phase layer, a sintered layer and a powder layer, and the flux is intermittently introduced into the casting mold, do. Thus, an oscillation mark (OM) is formed on the surface of the solidified material contacting the mold surface.

By using such a principle, the present invention forms a solidification product, analyzes the surface shape of the solidification product formed, and diagnoses the behavior of the solidification product in the mold, thereby improving operating conditions such as vibration of the mold and casting You can set the speed.

FIG. 2 is a view schematically showing an apparatus for forming a solidification product according to an embodiment of the present invention, FIG. 3 is a view showing a structure of an internal member constituting the apparatus for forming a solidification product shown in FIG. 2, FIG. 5 is a view showing an operation state of the apparatus for forming a solidification product according to an embodiment of the present invention, and FIG. 6 is a view showing an embodiment of the present invention Fig. 3 is a view showing a state in which a plurality of solidified-material forming apparatuses are installed.

Referring to FIG. 2, the coagulant-forming apparatus 200 may reproduce an actual continuous casting situation to form a solidified product MS from a melt contained in the vessel, for example, molten steel M.

The coagulating material forming apparatus includes a frame 260 provided at an upper portion of the container in which the melt is received, an inner member 220 connected to the frame 260, An outer member 210 connected to the frame 260 and provided on the outer side of the inner member 220 and surrounding at least a part of the inner member 220; A second driving means 242 for moving the outer member 210 in the vertical direction along the inner member 220 and a second driving means 242 for moving the outer member 210 in the vertical direction, 240) and the second driving means (242).

The frame 260 is disposed on the top of the container and supports the inner member 220 and the outer member 210 through the first driving means 240 and the second driving means 242.

The inner member 220 may be formed of the same material as the casting mold of the actual continuous casting apparatus. The inner member 220 may be formed of the same material as the casting mold. In order to cool the melt and form the solidified product MS, (216) may be formed. 3, an inlet port through which the coolant flows and an outlet port through which the coolant is discharged are formed in the upper part of the inner member 220. The inlet port 212 and the outlet port 214 are formed in the inner member 220, And is interconnected with the flow path 216. The coolant flowing into the inlet port 212 moves along the flow passage 216 in the inner member 220 and cools the inner member 220 and is discharged through the discharge port 214. [

The inner member 220 may be formed so as to extend in the vertical direction and have an area such that a solidification product MS can be formed on the surface of the inner member 220. At least one surface on which the solidification product MS is formed is formed flat . The inner member 220 may be formed in a rectangular parallelepiped shape as shown in FIG. 3, but may be formed in various shapes to form the solidified material MS. In addition, the inner member 220 may be formed integrally, but a plurality of blocks may be formed to be connected to each other.

The inner member 220 may be provided with a thermometer (not shown) for measuring the temperature of the inner member 220 or may be provided with a tumbling surface detector 250 for measuring the melt surface of the melt contained in the container . The bath surface detector 250 may be provided to move along with the movement of the inner member 220 and may detect the bath surface when the inner member 220 descends to limit the movement distance of the inner member 220 have. At this time, the thermometer and bather face detector 250 are well known techniques used in a general continuous casting apparatus, and a detailed description thereof will be omitted.

The vibrating device 230 is connected to the inner member 220 to vibrate the inner member 220. The vibrating device 230 serves as a casting vibration system for facilitating the withdrawal of castings in an actual continuous casting process. The vibration device 230 may be implemented by a vibrator or the like and may vibrate the internal member 220 according to conditions such as vibration frequency and vibration width under the control of the control unit so as to obtain an experimental result similar to an actual continuous casting process.

The outer member 210 is provided on the outer side of the inner member 220 and is formed to enclose at least a part of the inner member 220. The outer member 210 serves as an extractor for drawing the billet during billet production, and realizes the effect of billet departing from the billet. That is, the outer member 210 moves downward along the longitudinal direction of the inner member 220 in a state of being immersed in the melt in the container, and exhibits an effect that the main component is pulled out from the mold.

The outer member 210 may be formed to have a shape similar to that of the inner member 220 and an insertion port 222 used as an inlet through which the inner member 220 is inserted is formed in the upper portion, And a fixing portion 228 is formed on the upper portion of the outer member 210 to connect the second driving means 242. The outer member 210 may include a shield 226 surrounding a portion of the inner member 220 at the exterior of the inner member 220 and an opening 224 exposing a portion of the inner member 220 . The shielding portion 226 is formed to cover at least 1/3 of the area B from the lower portion of the inner member 210 when at least a part of the inner member 220, . At this time, the region where the outer member 210 surrounds the inner member 220 may be the same as or less than the region where the outer member 210 and the inner member 220 are immersed in the melt. For example, the opening 224 may expose a portion of one surface of the inner member 220, as shown in FIGS. 2 and 4, and the shield 226 may shield all of the remaining portion of the inner member 220. Alternatively, the opening 224 may be formed to expose all of four sides of the inner member 220. In this case, the shield 226 can be connected through the edge portion of the inner member 220 and advantageously the measurement of the behavior of the solidification (MS) can be measured through four sides of the inner member 220.

The outer member 210 is provided so as to be movable up and down along the inner member 220. Accordingly, a gap of about 0.1 to 0.5 mm may be formed between the outer member 210 and the inner member 220, and friction may be generated between the inner member 220 and the outer member 210 Inhibition or prevention.

The inner member 220 is inserted into the outer member 210 and a portion of the inner member 220 is enclosed by the outer member 210 so that the inner member 220 is inserted from the melt into the inner member 220, As shown in FIG.

In order to analyze the solidification behavior of the melt, the present invention forms a solidified product MS of the melt on the inner member 220. To this end, the outer member 210 and the inner member 220 are lowered and immersed in the melt, So that the member 210 can be lowered along the longitudinal direction of the inner member 220.

The first driving means 240 is connected to the frame 260 to connect and support the inner member 220 to the frame 260 and to move the inner member 220 in the vertical direction .

The second driving means 242 is connected to the fixing portion 228 provided on the frame 260 and the outer member 210 to connect and support the outer member 210 to the frame 260, Is moved in the vertical direction while being supported by the frame (260). The second driving means 242 moves the outer member 210 in the vertical direction along the longitudinal direction of the inner member 220.

The first and second driving means 242 may be cylinders having driving shafts extending in the vertical direction and various means capable of moving the inner member 220 and the outer member 210 in the vertical direction Can be used. Here, although the inner member 220 and the outer member 210 are driven by different driving means 240 and 242, it is needless to say that the inner member 220 and the outer member 210 may be driven by one driving means.

As shown in FIG. 6, a plurality of coagulating material forming apparatuses formed through the above-described structure may be provided. That is, the solidification forming apparatus including the inner member 220, the outer member 210, the hot water level detector 250, the vibration device 230, and the first and second driving means 242 is provided with a container 260, May be connected to each other along the width direction or the longitudinal direction of the container so as to be immersed in the melt in the container to form a plurality of solidified products MS. Since it is difficult to reproduce the same process conditions when measuring the solidification behavior of the melt, it is possible to form a plurality of solidification products (MS) in the melt under the same conditions by using such a plurality of solidification product formation apparatuses, There is an advantage that the behavior can be more accurately analyzed.

Further, since the descending speeds of the respective second driving means 242 can be controlled to be the same or different from each other, the solidification behavior of the molten material can be quickly analyzed according to the circumferential speed.

Hereinafter, a method for analyzing the behavior of solidification products using the solidification forming apparatus according to an embodiment of the present invention will be described.

FIG. 7 is a flowchart showing a method of evaluating the behavior of a solidification product according to an embodiment of the present invention, FIG. 8 is a view showing a process of forming a solidification product to evaluate the behavior of the solidification product according to an embodiment of the present invention, 9 is a graph showing a photograph of the solidification product formed by the embodiment of the present invention and a result of the surface analysis of the solidification product.

7, a method of evaluating the behavior of the solidified product includes a process (S100) of providing a melt in a container, and a step of immersing at least a part of the inner member 210 and the outer member 220 of the solidified product forming apparatus in the melt (S120) of vibrating the solidification forming apparatus (S120), a process of lowering the outer member (210) of the solidification forming apparatus to form a solidification product (MS) on the surface of the inner member (S140) of withdrawing the solidified product from the melt by lifting the solidified product forming apparatus (S140), separating the solidified product (MS) formed on the surface of the internal member 220 (S150) And a process of analyzing (S160).

First, the process of preparing the melt can be used in the container, which is the same as the molten steel (M) used in actual continuous casting. When the molten steel M is charged into the container, the flux S is injected into the container to form the same environment as the inside of the mold at the time of continuous casting. At this time, the molten steel (M) and the flux (S) to be used may be variously changed depending on the type of steel to be produced. Here, the melt is described as molten steel and flux, but the melt may be formed of a first melt and a second melt having different specific gravity, different kinds of steel, and the like, and the first melt and the second melt may have a plurality of layers And the like.

When a melt is provided in the container, a solidified product (MS) of the melt is formed using a solidification device provided on the upper part of the container.

The first driving means 240 and the second driving means 242 are driven through the control of the control unit to lower the inner member 220 and the outer member 210 to the container side. At this time, the inner surface of the inner member 220 and the outer member 210 are lowered while measuring the melt surface of the melt surface of the melt surface detector 250 installed in the inner member 220.

The detection result is transmitted to the control unit and the control unit recognizes that the lowering of the inner member 220 and the outer member 210 is completed, And the second driving means (240, 242).

When the lowering of the inner member 220 and the outer member 210 is completed, a portion of the inner member 220 and the outer member 210, that is, the lower portion thereof, is immersed in the melt. At this time, the upper side of the inner member 220 and the outer member 210 is provided outside the melt, and the lower side of the inner member 220 and the outer member 210 is immersed in the melt. More specifically, A portion of the shielding portion 226 and the opening portion 224 is disposed in the molten steel M. [

Next, the control unit drives the vibration device 230 to vibrate the inner member 220. Here, the driving of the vibration device 230 is performed after the inner member 220 and a part of the outer member 210 are immersed in the melted material. However, when the inner member 220 and the outer member 210 are descended, Or may be performed during the descent.

Then, the inner member 220 and the outer member 210 are immersed in the melt for about 1-3 seconds. The molten steel M is cooled by a temperature difference between the outer member 210 and the inner member 220 to form an initial solidified product MS on the surfaces of the outer member 210 and the inner member 220.

Then, the control unit drives the second driving means 242 to lower the outer member 210 along the longitudinal direction of the inner member 220. [ At this time, the outer member 210 can be lowered at the same speed as that of the cast steel in the actual continuous casting process. The surface of the inner member 220 protected by the shielding portion 226 of the outer member 210 is exposed and the molten steel M is cooled on the surface of the exposed inner member 220, Is formed. At this time, the outer member 210 is formed such that the inner space 223 is exposed to the molten steel M so that the molten steel M does not flow into the space 223, It is preferable to lower it to such a degree as to be able to maintain the inserted state. The flux S is introduced between the inner member 220 and the solidified material MS by the vibration generated by the vibration device 230 to form the flux film SF. The flux S is intermittently introduced between the inner member 220 and the solidification product MS in accordance with the vibration generated by the vibration device 230 and the solidification product MS and the flux film SF are supplied with the inner member 220 The oscillation mark OM is formed along the width direction of the oscillation mark OM. The solidification product (MS) and the oscillation mark (OM) thus formed are formed by reflecting the peripheral speed and vibration reflected in the actual continuous casting process.

The control unit stops the operation of the vibration device 230 and drives the first and second driving means 240 and 242 to move the inner member 220 and the outer member 210 into the molten metal .

Such processes may be performed using a plurality of coagulating material forming apparatuses. At this time, it is needless to say that the vibration condition and the descending speed may be variously applied to a plurality of coagulating material forming apparatuses.

Thereafter, when the inner member 220, the outer member 210 and the solidified product MS are cooled to a predetermined temperature, for example, a temperature at which the operation is possible, the solidified product MS and the flux film SF are separated from the inner member 220 .

Next, the surface of the solidified product MS is analyzed by using an analyzer using a laser beam or the like on the inner surface of the separated solidified product MS, that is, the surface of the inner member 220 side. At this time, an oscillation mark (OM) is formed on the inner surface of the solidified product MS while the flux S flows into the space between the inner member 220 and the solidified product MS. The oscillation mark OM) can be measured.

9 (a) shows the solidification product (MS) obtained through the solidification device, and FIG. 9 (b) shows the result of analyzing the inner surface of the obtained solidification product MS through the analyzer .

As shown in FIG. 9A, on the inner surface of the solidification product MS, stripe marks, that is, oscillation marks OM are formed along the width direction of the inner member 220. Oscillation Machine 9333

The gap OM may vary in accordance with the circumference, and the depth may vary according to the magnitude of vibration of the vibration device 230. The influence of the oscillation mark (OM) on the quality of the produced cast steel can be reduced as the interval and depth thereof are constant.

Of Figure 9 (b) is the distance from there to show the analysis of the inside surface, an oscillation mark (OM) doedaga interval remains constant in the 470 ~ 550 (10 -1 ㎜) area of the coagulum (MS) And the depth increased sharply. Such a result can be reflected in the actual continuous casting process to set process conditions that can improve the quality of the cast steel.

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. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the following claims.

200: coagulating material forming device 210: inner member
220: outer member 230: vibrating device
240: first driving means 242: second driving means
250: Bubble detector 260: Frame

Claims (16)

As a method for analyzing the behavior of a solidification product,
Providing a melt in the container;
Immersing at least a portion of an apparatus for forming a coagulum, comprising an inner member and an outer member surrounding at least a portion of the inner member, in the melt;
Forming a solidified material on the surface of the solidified material forming apparatus by lowering the outer member;
Withdrawing the coagulating material forming device from the melt by raising the coagulating material forming device;
Separating the solidified material from the solidified material forming apparatus; And
Analyzing the solidified material;
≪ / RTI > The method according to claim 1,
And a method of analyzing the behavior of the solidified product that vibrates the solidified product forming device in the process of forming the solidified product. The method of claim 2,
Wherein the melt comprises a first melt and a second melt injected onto the first melt. The method of claim 3,
Wherein the step of immersing at least a part of the coagulation-
Wherein at least a portion of the inner member enclosing the outer member is immersed in the first melt. The method of claim 4,
Wherein the step of immersing at least a part of the coagulation-
A method for analyzing the behavior of a solidification product while detecting the surface of the second melt using a tumbling detector. The method of claim 5,
Prior to the process of immersing at least a portion of the coagulum-forming apparatus in the melt,
And arranging a plurality of the coagulating material forming devices in the upper part of the container. The method according to claim 3 or 6,
Wherein the second melt flows into the space between the inner member and the solidification product during the vibration of the solidification product formation apparatus. The method of claim 7,
Wherein the plurality of coagulating material forming devices are vibrated in the same size or different sizes in a process of vibrating the coagulating material forming device. The method of claim 8,
In the course of forming the solidification product,
Lowering the outer member along the inner member to form a solidified product on a surface of the inner member,
Wherein said plurality of coagulant-forming devices lower each of said outer members at the same or different rates. The method of claim 9,
Wherein the analysis of the solidification product comprises analyzing the surface shape of the solidification product in contact with the inner member. An apparatus for cooling a melt to form a solidified product,
An inner member having at least a flat surface on one side;
An outer member provided on the outer side of the inner member and surrounding at least a part of the inner member;
Driving means for moving the inner member and the outer member in the vertical direction;
A control unit for controlling operations of the vibration device and the driving means;
≪ / RTI > The method of claim 11,
Wherein a flow path through which the coolant flows is formed inside the inner member. The method of claim 11,
Wherein the outer member is formed to enclose at least a lower portion of the inner member that is immersed in the melt. The method of claim 11,
Wherein the device for forming the solidified material is provided with a tumbling surface detector for detecting the tumbling surface of the molten material contained in the container. The method according to any one of claims 11 to 14,
And a vibrating device for vibrating the inner member. 16. The method of claim 15,
The apparatus for forming a solidified product
Wherein the plurality of coagulating material forming devices are provided along the width direction or the length direction of the container.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160073680A (en) * 2014-12-17 2016-06-27 주식회사 포스코 Forecasting apparatus for solid matter and forecasting method or solid matter using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160073680A (en) * 2014-12-17 2016-06-27 주식회사 포스코 Forecasting apparatus for solid matter and forecasting method or solid matter using the same

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