KR101834422B1 - Apparatus for casting and casting method using the same - Google Patents

Abstract

The present invention relates to a casting jig and a casting method using the same, wherein the jig includes: a support being mountable on a mold; a hollow partitioning member having opened upper and lower portions; and a fixing member connecting the partitioning member to the support such that an internal space of the mold is able to be divided. Accordingly, using the jig as described above, the present invention is able to suppress defects of a cast piece by efficiently forming a concentrated layer containing an alloy element on a surface of the cast piece.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a casting method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting jig and a casting method using the same, and more particularly, to a casting jig capable of suppressing defects in casting and a casting method using the same.

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 casting process, the cast steel is firstly 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. The primary cooling occurring in the mold is affected by the flow of the molten steel in the mold, the melting behavior of the mold flux and the uniform penetration ability between the mold and the cast.

On the other hand, the cast steel produced by the casting process has defects due to various causes. Such defects may occur due to the flow of molten steel in the mold, the load caused by the roll during casting, the load caused by the drawing, and the like. Particularly, defects generated by the molten steel flow are mixed with inclusions and slags. However, defects caused by loads caused by rolls and loads due to casting during casting are mainly caused by cracks on the surface of the cast steel, The cracks may be generated during the primary cooling of the molten steel in the mold.

Recently, copper (Cu) has been added for the purpose of securing weldability and low temperature toughness of marine structural steel. However, in the process of casting a cast steel at a high temperature of about 1500 ° C, copper leaks into the surface of the cast steel and then penetrates into the grain boundary of the steel to cause a crack. In addition, the crack sensitivity increases sharply by copper in the steel, mainly due to the concentration of copper by selective oxidation during casting or heating for rolling. Copper is very difficult to remove due to its low oxygen affinity even during oxidation and refining, and it is continuously concentrated in the product even after being scrapped. Therefore, when such scrap is used as scrap in a steelmaking process, the above-described phenomenon repeatedly occurs. The addition of nickel (Ni) in an amount of 1.5 to 2 times as much as the content of copper contained in the steel increases the solubility of copper in the cast steel, and the phenomenon that copper is eluted to the surface of the cast steel can be suppressed. However, since nickel is very expensive, it is a main factor for raising the production cost, and a measure for suppressing the surface defect of the cast steel while reducing the amount of nickel is required.

KR2012-0053742A KR1349918B KR1371959B

The present invention provides a casting fixture capable of suppressing or preventing defects formed on a cast steel and improving process efficiency and productivity, and a casting method using the same.

The present invention provides a casting fixture capable of reducing the amount of raw materials used and reducing the production cost, and a casting facility and a casting method using the same.

A casting jig according to an embodiment of the present invention is a casting jig to be cast into a mold during casting, the casting jig comprising: a support stand mountable to the mold; A hollow partition member having an upper and a lower open portion; And a fixing member for connecting the partition member to the support so as to divide the inner space of the mold, wherein the partition member includes a first partition member and a second partition member, Wherein each of the first partition wall member and the second partition wall member is disposed such that at least a part of the first partition wall member and the second partition wall member at least partially overlap each other in the width direction of the mold and form a space therein, And the partition member may be connected to the fixing member so as to be movable in the width direction of the mold.
1. A casting jig to be cast into a mold, the casting jig comprising: A hollow partition member having an upper and a lower open portion; And a fixing member for connecting the partition member to the support so as to divide the inner space of the mold, wherein the partition member includes a first partition member and a second partition member, Wherein the first partition wall member and the second partition wall member are disposed such that at least a part of each of the first partition wall member and the second partition wall member overlaps at least part of the mold in the longitudinal direction thereof to form a space therein, And the partition member may be connected to the fixing member so as to be movable in the longitudinal direction of the mold.

The support may extend in one direction to be seated on the top of the mold.

The support base may be provided so as to be movable in a vertical direction.

The support and the fixing member may include a non-magnetic body.

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The apparent porosity of the partition member may be 10 to 20%.

The bending strength of the partition member may be 100 to 200 kg / cm < 2 >.

The partition member, relative to the total 100% by weight, can include a SiO ₂ 2 to 6% by weight, ZrO ₂ 60 to 82% by weight, carbon 15 to 30% by mass and an antioxidant of 1 to 4% by weight.

The antioxidant may include at least one of Si, Al, and Ti.

The partition member may comprise at least 99 wt% AlN and less than 1 wt% of unavoidable impurities relative to 100 wt% of the total.

A casting method according to an embodiment of the present invention is a casting method comprising the steps of: providing a jig including a hollow partition member having upper and lower openings; Installing the fixture on an upper portion of the mold such that the partition member divides the internal space of the mold; A process of injecting molten steel into the mold; Supplying a mold flux onto the molten steel; And a step of casting the cast steel by solidifying the molten steel, wherein the step of installing the jig includes the step of adjusting the length in the width direction or the longitudinal direction of the mold, The inner space of the mold may be divided into a first region formed inside the partition member and a second region formed between the partition member and the inner wall of the mold, Area. ≪ / RTI >

The process of installing the fixture may be such that at least a part of the partition member contacts the molten steel, and at least a part of the partition member contacts the mold flux.

The step of installing the fixture may include a step of disposing the partition member on both sides of the immersion nozzle for injecting molten steel into the mold.

The distance between the inner wall of the mold and the partition member may be maintained at 20 to 100 mm in the process of installing the fixture.

In the process of installing the fixture, the partition member may be immersed in the range of 20 to 200 mm from the bath surface of the molten steel.

The step of supplying the mold flux may include supplying mold fluxes of different kinds to the first region and the second region.

The mold flux supplied to the second region may include nickel oxide.

And continuously supplying the mold flux to the second region in the process of casting the cast steel.

The casting jig according to the embodiment of the present invention and the casting method using the casting jig can easily form a thickened layer containing an alloy element on the surface of the cast steel. That is, the mold inner space can be divided using the jig during casting, and the mold flux having different components can be supplied to the divided spaces. At this time, a mold flux including an alloy element may be selectively injected between the inner wall of the mold and the jig to selectively form a thickened layer containing an alloy element on the surface of the casting. The alloying elements in the mold flux can be prevented from being diluted by the molten steel, so that most of the alloying elements can contribute to the formation of the concentrated layer, thereby forming the concentrated layer having the target concentration on the surface of the cast steel.

Further, the amount of the alloy element used for suppressing the surface defects of the cast steel can be reduced, and the increase in the production cost can be suppressed.

Figure 1 schematically shows a casting installation.
2 is a perspective view schematically showing a state in which a casting jig according to an embodiment of the present invention is applied to a mold.
FIG. 3 and FIG. 4 are cross-sectional views schematically showing a state in which a casting jig according to an embodiment of the present invention is applied to a mold.
5 is a view showing the structure of a casting jig according to an embodiment of the present invention.
6 to 8 are views showing the use state of the casting jig according to the embodiment of the present invention.
9 is a graph showing a comparison of the depth of the concentrated layer on the surface of the cast steel according to whether or not the jig is used according to the embodiment of the present invention.
FIG. 10 is a graph showing a comparison of Ni residual ratios in the surface layer of a cast steel according to whether or not a jig is used according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and it is to be understood that these embodiments are merely illustrative of the principles of the invention and are not intended to limit the scope of the invention to those skilled in the art. It is provided to let you know completely.

2 is a perspective view schematically showing a state in which a casting jig according to an embodiment of the present invention is applied to a mold, and FIGS. 3 and 4 are cross-sectional views of a mold according to an embodiment of the present invention. 5 is a view showing a structure of a casting jig according to an embodiment of the present invention, and Figs. 6 to 8 are views showing a structure of a casting jig according to an embodiment of the present invention, Fig.

1, the casting equipment includes a ladle 10 containing refined molten steel in a steelmaking process, and a casting nozzle (not shown) supplied with molten steel through an injection nozzle connected to the ladle 10, such as a shroud nozzle A mold 30 for receiving molten steel through an immersion nozzle 22 connected to the tundish 20 and an initial solidification layer Mc in a predetermined shape, And a cooling line 40 provided at a lower portion of the mold 30 and in which a plurality of segments are successively arranged so as to perform a series of molding operations while cooling the uncrosslinked slab 1 drawn from the mold 30 .

When the molten steel M in the tundish 20 is injected into the mold 30 by the immersion nozzle 22, a mold flux is injected onto the molten steel injected into the mold 30 Can be supplied. The mold flux may be supplied to the upper portion of the molten steel in a solid phase, for example, a powder state, or may be supplied to a molten mold flux in a liquid phase in which the solid phase flux is dissolved.

As the casting proceeds, the mold flux flows into the space between the inner wall of the mold 30 and the molten steel due to the vibration imparted to the mold 30 and lubricates the molten steel. Thus, molten steel solidified in the mold 30, Can be pulled downward. At this time, the mold flux can perform functions such as absorptive removal of inclusions in the molten steel, heat retention of the molten steel, and heat transfer rate control in addition to the action of the lubricant.

Further, the mold flux can form a coating layer on the surface of the cast steel. For example, when a cast steel is cast using a steel containing a large amount of copper, the copper component is eluted and oxidized to the surface of the cast steel, thereby causing a crack on the cast steel surface. Thus, it is possible to prevent the occurrence of cracks on the surface of the cast steel by forming a thickened layer containing nickel on the surface of the cast steel, that is, a coating layer. In order to form a thickened layer containing nickel on the surface of the cast steel as described above, a mold flux containing nickel oxide is injected into the molten steel above the molten steel. When the molten steel reacts with the inclusions contained in the molten steel during casting, There is a problem that it is difficult to form a concentrated layer having

Therefore, in the present invention, the mold inner space is divided using a jig and the mold flux having different components is selectively supplied for each divided space, thereby minimizing changes in the component and concentration of the mold flux, Layer can be formed.

2, the casting jig according to an embodiment of the present invention includes a support base 102 that can be mounted on a mold 30, a hollow partition member 110 having upper and lower openings, And a fixing member 120 connecting the partition member 110 so that the partition member 110 can be divided. 3 and 4, the jig may be provided symmetrically on both sides of the immersion nozzle 22, and the inner space of the mold 30 may be divided into a first region formed in the interior of the partition member 110, (A) and a second region (B) formed between the partition wall member (110) and the inner wall of the mold (30). For reference, the longitudinal direction of the mold 30 mentioned below means the direction corresponding to the width direction of the cast steel, and the width direction of the mold 30 means the direction corresponding to the thickness direction of the cast steel. And the longitudinal direction of the mold 30 means the direction in which the lead pieces are drawn out.

The support base 102 may be formed in a bar shape extending in one direction so as to be seated on the mold 30. The support base 102 may be provided on one side of the immersion nozzle 22 and may be seated on the upper side of the mold 30 along the width direction of the mold 30. It is preferable that the support member 102 is formed of a nonmagnetic material so as not to affect the ECLM for measuring the molten steel level using the magnetic field among the molten steel level measurement sensors. At this time, the non-magnetic body may include titanium.

Further, the support table 102 may be provided so as to be movable in the vertical direction. The support 102 may be installed to rest on the mold 30. The support member 102 may be provided with a lifting member 104 for moving the support member 102 in the vertical direction at a portion where the mold 30 contacts. The elevating member 104 may include a bolt that is rotatably inserted through the support base 102. At this time, the lower portion of the bolt may be provided so as to be able to contact the upper portion of the mold 30. Or the lower portion of the bolt may be inserted into and screwed into the mold 30 as shown in Fig. In this case, the support 102 can be moved upward or downward according to the degree of screw connection between the bolt and the mold 30. The level of the support platform 102 can be adjusted on the upper side of the mold 30 by moving the support platform 102 in the vertical direction by using the elevation member 104. [ Needless to say, the support base 102 may be vertically movable by a driver (not shown) or a gear box (not shown) connected to the support base 102.

The partition member 110 includes a first partition member 110a formed in a plate shape having an area and having a substantially U shape with one side opened, a second partition member 110b having a substantially U- Member 110b. The first partition member 110a and the second partition member 110b may be disposed such that one side of the first partition wall member 110a faces the other and at least a part of the first side wall member 110a overlaps one another. Accordingly, the first partition member 110a and the second partition member 110b may be formed in a hollow shape having open top and bottom portions.

The partition member 110 can be formed of a material which can withstand the hot molten steel and the mold flux in the mold 30 and does not react with them. The partition wall member 110 is formed of a material containing 2 to 6 mass% of SiO ₂ , 60 to 82 mass% of ZrO ₂ , 15 to 30 mass% of carbon and 1 to 4 mass% of antioxidant based on 100 mass% . If the content of SiO ₂ contained in the partition wall member 110 is less than 2 mass%, cracking may occur due to thermal shock at the initial stage of casting, and if it exceeds 6 mass%, erosion due to mold flux may occur excessively. If the content of ZrO ₂ contained in the partition member 110 is less than 60% by mass, erosion by the mold flux may occur, and if it exceeds 82% by mass, it may be damaged by thermal shock. When the diaphragm and the content of carbon contained in the partition member 110 are less than 15 mass%, cracking may occur due to thermal shock. When the content exceeds 30 mass%, carbon pickup occurs in the molten steel, . It can adversely affect the properties. The antioxidant is added to prevent the oxidation of carbon, and at least one of Al, Si and Ti may be used.

Alternatively, the barrier rib member 110 may be formed of a material including AlN. At this time, the AlN may include 99 wt% or more of AlN relative to 100 wt% of the total amount, and inevitable impurities of less than 1 wt% may be included. When AlN is used for the partition member 110, there is little concern about oxidation, and thus no antioxidant is included.

In addition, the partition member 110 may be manufactured to have an apparent porosity of about 10 to 20% and a bending strength of 100 to 200 kg / cm 2. When the apparent porosity of the partition member 110 is lower than the range shown in the drawing, the thermal shock resistance is remarkably lowered to cause cracking during fracture of the molten steel. If the apparent porosity is higher than the range shown in the drawing, the mechanical properties of the partition member 110 are lowered Damage due to molten steel flow may occur. In addition, if the bending strength of the partition member 110 is smaller than the suggested range, damage may occur due to the molten steel flow. If the bending strength is larger than the prescribed range, damage due to thermal shock may occur.

The fixing member 120 may connect the partition member 110 to the support member 102. At this time, the fixing member 120 may connect the partition member 110 so as to be movable in the width direction or the longitudinal direction of the mold 30. The fixing member 120 may be formed with a first guide groove 122 for inserting one side of the first partition member 110a. In order to prevent the first partition member 110a from being separated from the fixing member 120, a flange 112 may be formed on one side of the first partition member 110a. The first partition wall member 110a may be connected to the fixing member 120 so as to be movable in a sliding manner by inserting the flange 112 into the first guide groove 122. [

In addition, the second partition wall member 110b may have a protrusion 114 formed on one side of the second partition wall member 110b that is in contact with the first partition member 110a. A second guide groove 116 may be formed in the first partition member 110a so that the protrusion 114 is inserted into the first partition member 110a. The protrusions 114 of the second partition member 110b can be connected to the second guide grooves 116 of the first partition member 110a so as to be movable in a sliding manner.

It is preferable that the fixing member 120 is formed of a nonmagnetic material so as not to affect the ECLM for measuring the molten steel level using the magnetic field among the molten steel level measuring sensors as in the case of the supporting table 102. [ At this time, the non-magnetic body may include titanium.

Meanwhile, the partition member 110 may be formed to be adjustable in length in the longitudinal direction or the width direction of the mold 30.

Referring to FIG. 7, the first partition member 110a and the second partition member 110b may be formed in a long rectangular shape in the longitudinal direction of the mold 30. And one side of the first partition member 110a and one side of the second partition member 110b are overlapped with each other so that at least one of the first partition member 110a and the second partition member 110b is placed in the mold 30, As shown in Fig. This is for providing a casting jig in correspondence with the width of the cast steel to be cast. When the width of the cast steel is small, for example, 900 mm, the degree of overlap between the first partition wall member 110a and the second partition wall member 110b In the case where the width of the cast steel is relatively large, for example, 1500 mm, the degree of overlap between the first partition wall member 110a and the second partition wall member 110b can be reduced.

Referring to FIG. 8, the first partition member 110a and the second partition member 110b may be overlapped with each other in the width direction of the mold 30. This is to cope with the thickness change of the casting die and to move at least one of the first partition member 110a and the second partition member 110b in the width direction of the mold 30, The length of the partition member 110 can be increased or decreased in the width direction of the partition member 110. [

With such a structure, the fixture can be installed quickly in response to changes in the width and thickness of the cast steel.

Hereinafter, a casting method according to an embodiment of the present invention will be described.

A method of casting according to an embodiment of the present invention includes the steps of providing a jig 100 including a hollow partition member 110 having upper and lower openings, A process of injecting molten steel into the mold 30, a process of supplying the mold flux to the molten steel, a process of solidifying the molten steel to cast the molten steel, . ≪ / RTI > The inner space of the mold is divided into a first region A formed in the partition wall member and a second region A formed between the partition wall member 110 and the inner wall of the mold 30, (B).

First, the fixture 100 is installed on the mold 30 to divide the inner space of the mold 30. At this time, when the jig 100 is not leveled, the elevation member 104 can be used to raise or lower the support table 102 to adjust the level. The jig 100 can be disposed on both sides of the immersion nozzle 22 and at least a part of the partition member 110 is then brought into contact with molten steel by molten steel and mold flux injected into the mold 30, At least a portion of the mold flux 110 may contact the mold flux.

The partition member 110 may be installed to maintain 20 to 100 mm with the inner wall of the mold 30. At this time, when the distance between the partition member 110 and the mold 30 is smaller than the prescribed range, the mold flux can not be sufficiently melted by the heat of the molten steel, and the amount of the mold flux injected into the space between the inner wall of the mold 30 and the molten steel The lubricating action is lowered, and it is difficult to form a desired thickened layer on the surface of the cast steel. When the distance between the partition member 110 and the mold 30 is larger than the range shown in the drawing, the molten steel flow causes the deformation of the mold flux, for example, the dilution effect of the Ni component contained in the mold flux, There is a problem that it is difficult to form a layer.

Further, the partition member 110 may be installed so as to be immersed in the range of 20 to 200 mm from the molten steel bath surface. This is because the partition member 110 is sufficiently immersed even in the molten steel level fluctuation in the mold 30 to prevent mixing of the mold flux injected into the first region A and the second region B . However, when the immersion depth of the partition member 110 is larger than the range shown in the drawing, interference with the molten steel discharged from the immersion nozzle 22 may occur, and heat transfer to the outside of the partition member 110 may be interrupted to form an initial excessively solidified structure There is a problem.

When the partition member 110 is installed in the mold 30, the molten steel and the mold flux are injected into the mold 30 through the immersion nozzle 22. At this time, since the inner space of the mold 30 is divided by the partition member 110, the mold flux must be injected into the first region A and the second region B, respectively.

The outside of the partition member 110, that is, the second region B, may be filled with a mold flux containing nickel oxide (NiO), for example, a first mold flux. The first mold flux has a function of sufficiently thickening Ni only at the surface layer where initial solidification in the mold 30 starts, a lubrication function between the mold 30 and the solidification shell, and a heat transfer control function between the mold 30 and the solidification shell. First mold flux is SiO _2, CaO, MgO, Al ₂ O _3, Na ₂ O, F, and the nickel oxide comprising a composition containing a nickel oxide is 5wt% to 40 wt% range based on the total weight of the composition ≪ / RTI > No. If in the first mold flux MgO is _{1.0 ~ 1.5 wt%, Al 2} O 3 is _{5 ~ 7 wt%, Na 2} O is 3 ~ 5wt%, F may be contained 5 ~ 7wt%, other CaO and SiO ₂ is CaO / SiO ₂ may be included to have a ratio of 0.8 to 1.4.

The inner side of the partition member 110, that is, the first region A is a region where the solidification of molten steel does not proceed, a function of preventing the molten steel from being oxidized by contact with the atmosphere, a function of keeping the supercooling from occurring, A second mold flux having a function of collecting when the inclusion in the molten steel floats can be input. At this time, since the solidification of the molten steel does not proceed in the first region A, the second mold flux need not have the function of controlling the lubrication and the heat transfer. The second mold flux may be classified into a high basic mold flux and a low basic mold flux according to the steel species to be cast. Al ₂ O ₃ inclusions in molten steel due to Al deoxidization and the steel containing molten Al in the steel minimizes the SiO ₂ content in the flux so that the reduction reaction by molten Al in the molten steel can be suppressed. And it can be designed to easily absorb the Al ₂ O ₃ inclusions floating by holding the highly salt air (CaO / SiO ₂ ). This is because CaO is 40 to 60 wt%, Al ₂ O ₃ is 20 to 40 wt%, SiO ₂ is less than 10 wt%, and other carbon may be included. In addition, due to Si deoxidation, the molten steel containing many SiO ₂ inclusions in the molten steel has a very small amount of molten Al in the steel, so there is no need to worry about reoxidation of the molten steel. In order to minimize incorporation of Al ₂ O ₃ inclusions, Al ₂ O ₃ is contained , Which may contain CaO in an amount of 30 to 50 wt%, SiO _{2 in an amount} of 40 to 60 wt%, and Al ₂ O ₃ in an amount of less than 10 wt%. The particle size of the second mold flux may be in the form of a granule having a diameter of 1 to 5 mm in order to secure sufficient thermal insulation.

Further, since the second mold flux injected into the first region A is surrounded by the partition member 110, the inflow of the mold 30 into the molten steel is interrupted, so that the second mold flux is hardly consumed during casting. If the second mold flux is sufficiently injected into the first region A of the casting, the second mold flux may not be further injected into the first region A during casting. Since the first mold flux injected into the second region B is consumed continuously as the casting progresses, it can be continuously injected at a rate of 0.2 to 1 kg per ton of molten steel.

Hereinafter, an experimental example for evaluating the performance of a cast steel cast by a casting method according to an embodiment of the present invention will be described.

FIG. 9 is a graph showing a comparison of the depth of the concentrated layer on the surface of the cast steel depending on whether or not the jig is used according to the embodiment of the present invention. FIG. 10 is a graph showing the relationship between the Ni This graph shows the comparison of the residual ratios.

Comparative Example

The specimens were cast using a mold flux containing Al deoxidized steel and NiO without using jig in the test machine.

Example

In the test machine, a casting fixture according to an embodiment of the present invention was installed in a mold, and molten steel and mold flux were injected into the mold to cast the specimen. At this time, Al deoxidized steel was used as the molten steel, and mold flux (first mold flux) containing high salt resistance mold flux (second mold flux) and NiO was used.

The depth of the thickened layer and the residual ratio of Ni in the thickened layer were analyzed from the cast specimens.

First, the depth of the thickened layer formed on the surface of the specimen was measured as follows.

In the case of the specimen cast by using the jig (Example), it was found that the concentrated layer was formed at a certain depth from the specimen surface as shown in FIG. On the other hand, in the case of specimens molded without using jig (comparative example), it can be seen that the thickened layer is formed deeply in the width direction of the specimen and the depth of the thickened layer becomes shallower toward the edge.

The residual ratio of Ni in the thickened layer formed on the surface of the specimen was analyzed as follows.

The residual ratio (%) of Ni in the thickened layer was calculated by calculating the ratio of the contribution of the total amount of Ni in the mold flux (first mold flux) added to the amount of Ni content increase when the surface portion of the casted specimen was analyzed. As a result, about 35% of the total Ni injected by the mold flux contributed to the Ni concentration in the surface layer in the comparative example, and in the case of the embodiment, about 80% of the total Ni contributed to the Ni concentration in the surface layer of the casting. It is confirmed that the desired shape of the concentrated layer can be formed on the surface of the cast steel by dividing the inner space of the mold using the jig and selectively casting different mold fluxes into the divided regions.

Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.

10: mold 20: immersion nozzle
30: mold 100: jig
102: support base 104:
110a: first partition member 110b: second partition member
120: Fixing member

Claims (21)

As a casting jig to be put into a mold during casting,
A support mountable to the mold;
A hollow partition member having an upper and a lower open portion; And
A fixing member for connecting the partition member to the support so as to divide the internal space of the mold;
Lt; / RTI >
The partition member may include a first partition member and a second partition member,
The first partition wall member and the second partition wall member are disposed such that at least a part of each of the first partition wall member and the second partition wall member overlaps at least a part in the width direction of the mold to form a space therein,
The fixing member is disposed in parallel with the width direction of the mold,
Wherein the partition member is connected to the fixing member so as to be movable in the width direction of the mold. As a casting jig to be put into a mold during casting,
A support mountable to the mold;
A hollow partition member having an upper and a lower open portion; And
A fixing member for connecting the partition member to the support so as to divide the internal space of the mold;
Lt; / RTI >
The partition member may include a first partition member and a second partition member,
The first partition wall member and the second partition wall member are disposed such that at least a part of each of the first partition wall member and the second partition wall member overlaps the longitudinal direction of the mold to form a space therein,
Wherein the fixing member is disposed in parallel with the longitudinal direction of the mold,
And the partition member is connected to the fixing member so as to be movable in the longitudinal direction of the mold. The method according to claim 1 or 2,
Wherein the support base extends in one direction so as to be seated on the upper portion of the mold. The method of claim 3,
And the support base is provided so as to be movable in the vertical direction. delete delete delete The method of claim 4,
Wherein the support and the fixing member comprise a non-magnetic material. The method of claim 8,
Wherein the septum member has an apparent porosity of 10 to 20%. The method of claim 9,
The bending strength of the partition member is 100 to 200 kg / cm < 2 >. The method of claim 10,
Wherein,
Wherein the composition comprises 2 to 6% by mass of SiO ₂ , 60 to 82% by mass of ZrO ₂ , 15 to 30% by mass of carbon and 1 to 4% by mass of an antioxidant based on 100% by mass of the total mass. The method of claim 11,
Wherein the antioxidant comprises at least one of Si, Al, and Ti. The method of claim 10,
Wherein,
A casting jig comprising 99% by weight or more of AlN and 1% by weight or less of unavoidable impurities relative to 100% by weight of the total. delete delete delete delete delete delete delete delete

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