CN110116193B - Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method - Google Patents
Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method Download PDFInfo
- Publication number
- CN110116193B CN110116193B CN201910371276.3A CN201910371276A CN110116193B CN 110116193 B CN110116193 B CN 110116193B CN 201910371276 A CN201910371276 A CN 201910371276A CN 110116193 B CN110116193 B CN 110116193B
- Authority
- CN
- China
- Prior art keywords
- round billet
- crystallizer
- heating element
- continuous casting
- round
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
-
- 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
- B22D11/14—Plants for continuous casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a round billet crystallizer which comprises a crystallizer body, wherein a heating element is arranged on the inner wall of the crystallizer body and positioned at the liquid level of molten steel. The invention also discloses continuous casting equipment adopting the round billet crystallizer and a continuous casting round billet oscillation mark restraining method. In the invention, a heating element is arranged on the hot surface of the round billet crystallizer near the liquid level of molten steel in the continuous casting crystallizer; the heating element heats in a pulse mode to inhibit the solidification of the liquid level of the bent molten steel close to one side of the slab crystallizer, so that the depth of the vibration mark on the surface of the continuous casting billet can be effectively reduced, and the vibration mark on the surface of the continuous casting billet can be completely eliminated; it is expected to completely eliminate the defects of the surface of the cast slab, such as subsurface inclusions, subsurface pores, subsurface segregation and surface cracks, which are accompanied by the generation of the surface vibration marks of the cast slab.
Description
Technical Field
The invention belongs to the technical field of continuous casting, and particularly relates to a round billet crystallizer, continuous casting equipment and a continuous casting round billet oscillation mark inhibiting method.
Background
The continuous casting billet vibration marks refer to periodic transverse depressions on the surface of the continuous casting billet. Many casting blank surface defects are generated along with vibration marks, firstly, vibration mark wave troughs cause coarse grains in blank shells at the wave troughs due to low cooling rate; secondly, when the vibration mark dent is stressed, the notch effect can be induced; the third oscillation mark wave trough is often seriously element segregated and is the origin of surface cracks of the casting blank. Meanwhile, a large amount of bubbles and non-metallic inclusions are often captured by the vibration mark troughs, and the bubbles and the inclusions finally form surface defects on a rolled steel product after being rolled, such as blisters and slivers defects of steel for automobile panels. The severity of chatter marks accompanying surface quality problems can generally be characterized by the depth of the chatter marks. Because the deeper the oscillation mark, the coarser the casting blank crystal grain at the trough of the oscillation mark, and the more serious the element segregation. Therefore, the reduction/elimination of the vibration marks of the casting blank has extremely important significance for improving the quality of steel products.
Vibration marks are generated in the initial solidification stage of molten steel in the continuous casting process, and the initial solidification of the molten steel occurs near the molten steel liquid level of the round billet mold, so that the vibration marks on the surface of a casting blank can be eliminated/reduced fundamentally by controlling the solidification of the molten steel near the molten steel liquid level. The technology for controlling the initial solidification of molten steel to reduce/eliminate the continuous casting surface oscillation marks in the continuous casting practice comprises the following steps: the method comprises the following steps of increasing the pouring temperature of molten steel, increasing the blank drawing speed, reducing the negative slip time of a round blank crystallizer, adopting a molten steel liquid level electromagnetic soft contact technology (low penetration of electromagnetic energy), adopting a molten steel solidification technology near the molten steel liquid level by covering slag, adopting a hot top crystallizer technology with a crystallizer material with low heat conductivity coefficient, adopting a horizontal crystallizer vibration technology, adopting a crystallizer non-sinusoidal vibration technology, grooving on the surface of the crystallizer (increasing heat resistance by the covering slag permeating into the groove, reducing meniscus heat transfer), adopting an electromagnetic braking technology (only acting on the narrow surface of the crystallizer, slightly improving the oscillation mark depth of the narrow surface of a casting blank), and. Because the experiences and the technologies are only suitable for being used under certain working conditions, the vibration marks on the surface of the casting blank are not fundamentally eliminated, and other surface defects are even introduced in the production. For example, excessive molten steel pouring temperature and casting speed can cause casting leakage of a billet shell; the depth of the oscillation mark can be reduced by reducing the negative slip time of the round billet crystallizer, but the round billet crystallizer does not have negative slip, so that the covering slag is difficult to permeate, and the surface of the round billet is cracked.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the present invention is to provide a round billet mold, a continuous casting apparatus, and a method for suppressing chatter marks in a continuous casting round billet, which can reduce the depth of chatter marks in the surface of a continuous casting billet.
In order to solve the technical problems, the invention adopts the following technical scheme:
a round billet crystallizer comprises a crystallizer body, wherein a cylindrical crystallization cavity is formed in the crystallizer body, and a heating element is arranged on the inner wall of the cylindrical crystallization cavity and positioned at the metal liquid level.
Furthermore, the heating element is embedded on the inner wall of the cylindrical crystallization cavity, and the outer surface of the heating element is flush with the inner wall surface of the cylindrical crystallization cavity.
Furthermore, an annular groove is formed in the inner wall of the cylindrical crystallization cavity, and the heating element is embedded in the annular groove.
Furthermore, the heating heat quantity of the heating element close to one side surface of the molten metal in unit time and unit square meter area is 50-300000W/m2。
Further, when the round billet crystallizer is used for continuous casting of nonferrous metals, when the round billet crystallizer moves upwards, the heating element is electrified to generate heat, and the heating duration is 50% -100% of the upward movement duration of the round billet crystallizer; or when the round billet crystallizer is used for continuous steel casting, when the round billet crystallizer moves downwards, the heating element is electrified to generate heat, and the heating duration is 50-100% of the downward movement duration of the round billet crystallizer.
A continuous casting device comprises the round billet crystallizer.
A method for suppressing the vibration mark of continuous casting round billet includes pouring molten steel from tundish to round billet crystallizer, adding protecting slag to the surface of molten steel in the round billet crystallizer, cooling in the round billet crystallizer to solidify the molten steel into round cast billet with liquid core, continuously drawing the round cast billet with liquid core out of the outlet of the round billet crystallizer and passing it through secondary cooling area to obtain fully solidified round cast billet, setting heating element on the surface of molten steel on the inner wall of the round billet crystallizer, and using the heat generated by the heating element to lower the initial forming point of solidified shell and suppress the solidification of curved molten steel surface near the round billet crystallizer.
Further, when the round billet crystallizer moves downwards, the heating element is electrified to heat, and the heating duration is 50% -100% of the duration of the downward movement of the round billet crystallizer.
A method for suppressing the vibration mark of continuous casting round billet includes such steps as pouring the non-ferrous metal liquid from tundish to round billet crystallizer, cooling the non-ferrous metal liquid in the round billet crystallizer, solidifying to obtain round cast billet with liquid core, continuously drawing the cast billet with liquid core from the outlet of round billet crystallizer, and passing it through secondary cooling region to obtain fully solidified round cast billet.
Further, when the round billet crystallizer moves upwards, the heating element is electrified to heat, and the heating duration is 50% -100% of the upward movement duration of the round billet crystallizer.
Furthermore, the heating element is an electric heating sheet.
Principle of the technology
For steel continuous casting, a period of time exists in the time of descending vibration of each round billet crystallizer, and the descending speed of the round billet crystallizer is greater than the blank drawing speed in the negative slip time; the duration of a negative slip in one cycle is called the negative slip time, and the other times are the positive slip times. The inventor observes through a large number of experiments that when the round billet mold is subjected to negative slip, the heat flux density of the round billet mold near the liquid level of molten steel suddenly rises. The reason for this is found to be that when the round bar mold is slipping negatively, a part of the meniscus (meniscus: the surface of the molten steel which is near the round bar mold and is bent by the interfacial tension) solidifies, releasing a large amount of heat. When the round billet crystallizer is subjected to negative slip, the meniscus is close to the round billet crystallizer, and the cooling potential energy of the round billet crystallizer is very large, so that the meniscus is solidified at an accelerated speed, and the corresponding experimental result shows that the heat flux density passing through the crystallizer is suddenly increased during the negative slip; at the last stage of negative slip of the round billet crystallizer to the early stage of positive slip, along with the descending of a casting blank, a solidified meniscus billet shell is pushed back to the round billet crystallizer under the action of the static pressure of molten steel to form a concave type oscillation mark; if the strength of the solidified arc meniscus blank shell is large enough, the molten steel overflows above the solidified meniscus to form a solidified hook-shaped oscillation mark.
For non-ferrous metal continuous casting, when a crystallizer vibrates upwards, the three-phase point of solidified solid-molten metal-lubricant is unstable, so that oscillation marks are generated, and the nature generated by the oscillation marks can be understood as residues of meniscus solidification.
Therefore, a prerequisite for the formation of chatter marks in the continuous casting of steel or nonferrous metals is the solidification of a part of the meniscus; the more the meniscus solidifies, the deeper the oscillation mark, and the greater the probability of forming a solidification mark. Thus, the meniscus molten steel is prevented from solidifying or the initial solidification position of the molten steel is lowered, and the chatter mark is eliminated or the depth of the chatter mark is reduced.
Compared with the prior art, the invention has the advantages that:
the heating element is skillfully arranged at a special position on the crystallizer, so that the solidification of meniscus molten steel or non-ferrous metal liquid is inhibited or the initial solidification position of the molten steel is reduced, a slag ring can be effectively reduced, the surface oscillation mark depth of a continuous casting blank is reduced, even the surface oscillation mark of the continuous casting blank is completely eliminated, the surface defects of the casting blank, such as subcutaneous inclusions, subcutaneous air holes, subcutaneous segregation and surface cracks, which are generated along with the generation of the surface oscillation mark of the casting blank are expected to be completely eliminated, meanwhile, the large-scale reconstruction of the existing continuous casting equipment is not needed, and the reconstruction cost of the continuous casting equipment is low.
Drawings
FIG. 1 is a mounting diagram of a heating element on a hot surface of a round billet crystallizer;
FIG. 2 is a sectional view of a round billet mold;
FIG. 3 is a surface topography of a round billet prepared by the round billet crystallizer of the present invention.
FIG. 4 is a surface topography of a round billet prepared by using a conventional round billet crystallizer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, a round billet mold comprises a mold body 1, a cylindrical crystallization cavity is formed in the mold body, a heating element 3 is arranged on the inner wall (hot surface) of the cylindrical crystallization cavity at the molten steel liquid level 2, and during round billet continuous casting, the heating element 3 generates heat to preheat the primary solidified billet shell, so as to reduce the position of the initial forming point of the solidified billet shell and inhibit the solidification of the curved molten steel liquid level close to one side of the round billet mold body 1.
Referring to fig. 2, specifically, a circular groove is formed in the inner wall of the cylindrical crystallization cavity, the heating element 3 is embedded in the groove in a ring-shaped element matching manner, a round billet crystallizer water tank 4 is further arranged in the inner wall of the crystallizer body 1 and used for introducing cooling water to cool a hot surface, and the outer surface of the heating element 3 is flush with the inner wall surface of the cylindrical crystallization cavity.
Specifically, the cylindrical crystallization cavity is enclosed by a cylindrical copper pipe, and the heating element is embedded on the inner side wall of the cylindrical copper pipe; in practical design, the heating element 3 may be an electric heating sheet, the heating element is made of an electric heating material such as silicon molybdenum, nickel-chromium alloy (preferred), iron-chromium alloy, molybdenum, tungsten, and the like, the heating element is in a strip shape, and the cross section of the heating element is in a trapezoid shape, a T shape or a rectangular shape, preferably a rectangular shape. Taking a heating element with a rectangular cross section as an example, the height of the heating element is 5-20 mm, and the priority value is 2 times of the vibration stroke of the round billet crystallizer, such as 12 mm; the thickness of the heating element is 0.5-10 mm, preferably one fourth of the thickness of the cylindrical copper tube, for example 10 mm. Heating heat corresponding to the surface of the heating element close to one side of the molten steel in unit time and unit square meter area, namely rated heating heat flow density of 50-300000W/m2A priority value of 200W/m2。
The round billet crystallizer/heating elements and the corner heating elements of the round billet crystallizer are separated by using an insulating material with the thickness of 0.1-1 mm, for example, the insulating material is as follows: mica flakes, alumina, boron nitride, silicon nitride, preferably mica flakes.
According to the invention, the heating element 3 is arranged in the crystallizer, and the primary solidified shell is preheated by heat generated by the heating element 3, so that molten steel solidification at a meniscus is inhibited or the initial solidification position of the molten steel is reduced, and finally, oscillation marks are eliminated or the depth of the oscillation marks is reduced.
A continuous casting device comprises the round billet crystallizer.
A method for suppressing the vibration mark of continuous casting round billet includes pouring molten steel from tundish to round billet mould, adding protecting slag to the surface of molten steel in the mould, cooling in the mould to solidify the molten steel into round billet with liquid core, continuously drawing the cast billet with liquid core out of the mould and passing it through secondary cooling region to obtain fully solidified round billet, setting heating element on the surface of molten steel on the internal side wall of the mould, and using the heat generated by the heating element to lower the initial forming point of solidified shell and suppress the solidification of the molten steel surface near one side of the mould.
In order to save energy, the heating element generates heat in a square wave mode, namely when the slab crystallizer vibrates downwards, the heating element 3 is electrified to generate heat, and the heating duration is 50-100% of the downward movement duration of the slab crystallizer; besides square wave heating, the heating mode of the heating element can be set to be sawtooth wave and semi-cosine wave when the slab crystallizer vibrates downwards; in addition, during the falling process of the crystallizer, the heating element can be divided into a plurality of wavelets to generate heat, and the heating period of each wavelet is set to be 1/n (n is a positive integer) of the period of the crystallizer. It is of course also possible to heat the mold during the entire oscillation thereof.
The round billets obtained by conducting the continuous casting test using the round billet mold and the mold without the heating element according to the present embodiment are shown in fig. 3 and 4. The process parameters for preparing peritectic steel round billets in the continuous casting process are as follows: the casting speed is 12mm/s, the vibration frequency is 2.5Hz (namely the vibration period is 0.5s), the vibration amplitude is 3mm, the casting temperature is 1510 ℃, the cooling water flow is 7m/s, and the water temperature is 24 ℃. From fig. 3, it can be seen that the round billet prepared by the round billet crystallizer of the present invention has smooth surface and shallow depth of oscillation mark, and basically has no surface oscillation mark, while from fig. 4, a plurality of continuous oscillation marks are formed on the round billet surface.
The method for inhibiting the continuous casting round billet vibration mark has the advantages that the heating element is skillfully arranged at a special position on the crystallizer and heats in a pulse mode to preheat the primary solidified billet shell, so that a slag ring can be effectively reduced, the surface vibration mark depth of the continuous casting billet can be reduced, and even the surface vibration mark of the continuous casting billet can be completely eliminated, the surface defects of the casting billet, such as subcutaneous inclusions, subcutaneous air holes, subcutaneous segregation and surface cracks, which are generated along with the generation of the surface vibration mark of the casting billet can be completely eliminated, meanwhile, the large-scale reconstruction of the existing continuous casting equipment is not needed, and the reconstruction cost of the continuous casting equipment is low.
Of course, the method can also be adopted to inhibit the oscillation marks of the non-ferrous metal continuous casting round billet, and different from the inhibition of the oscillation marks of the steel round billet, when the round billet crystallizer moves upwards, the heating element is electrified to generate heat, and the heating duration is 50% -100% of the upward movement duration of the round billet crystallizer.
The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (7)
1. A round billet crystallizer is characterized in that: the crystallizer comprises a crystallizer body, wherein a cylindrical crystallization cavity is formed in the crystallizer body, and a heating element is arranged on the inner wall of the cylindrical crystallization cavity and positioned at the metal liquid level;
when the round billet crystallizer is used for continuous casting of nonferrous metals, when the round billet crystallizer moves upwards, the heating element is electrified to heat, and the heating duration is 50-100% of the upward movement duration of the round billet crystallizer; in the alternative, the first and second sets of the first,
when the round billet crystallizer is used for steel continuous casting, when the round billet crystallizer moves downwards, the heating element is electrified to generate heat, and the heating duration is 50% -100% of the downward movement duration of the round billet crystallizer.
2. The round billet crystallizer of claim 1, wherein: the heating element is embedded on the inner wall of the cylindrical crystallization cavity, and the outer surface of the heating element is flush with the inner wall surface of the cylindrical crystallization cavity.
3. The round billet crystallizer of claim 2, wherein: the inner wall of the cylindrical crystallization cavity is provided with an annular groove, and the heating element is embedded in the annular groove.
4. The round billet crystallizer of claim 1, wherein: the heating element has a heating heat quantity of 50-300000W/m corresponding to the surface of the side close to the molten metal in unit time and unit square meter area2。
5. A continuous casting apparatus, characterized in that: comprising a round billet crystallizer as claimed in any of claims 1 to 4.
6. A continuous casting round billet chatter mark restraining method is characterized by comprising the following steps: pouring molten steel into a round billet crystallizer from a tundish, adding casting powder on the liquid level of the molten steel in the round billet crystallizer, cooling in the round billet crystallizer to solidify the molten steel into a cast round billet with a liquid core, continuously drawing the cast billet with the liquid core out of an outlet of the round billet crystallizer and passing through a secondary cooling zone to obtain a completely solidified cast round billet, wherein a heating element is arranged on the liquid level of the molten steel on the inner side wall of the round billet crystallizer, and the heat emitted by the heating element is used for reducing the position of an initial forming point of a solidified billet shell and inhibiting the solidification of the liquid level of the curved molten steel close to one side of the round billet crystallizer in the process of forming the cast round billet;
when the round billet crystallizer moves downwards, the heating element is electrified to heat, and the heating duration is 50-100% of the downward movement duration of the round billet crystallizer.
7. A continuous casting round billet chatter mark restraining method is characterized by comprising the following steps: pouring non-ferrous metal liquid into a round billet crystallizer from a tundish, cooling the non-ferrous metal liquid in the round billet crystallizer, solidifying the non-ferrous metal liquid into a cast round billet with a liquid core, continuously pulling out the cast billet with the liquid core from an outlet of the round billet crystallizer, passing through a secondary cooling area to obtain a completely solidified cast round billet, arranging a heating element on the inner side wall of the round billet crystallizer and at the liquid level of the non-ferrous metal liquid, and reducing the position of an initial forming point of a solidified billet shell by the heat emitted by the heating element in the process of forming the cast round billet and inhibiting the solidification of the liquid level of the curved non-ferrous metal liquid close to one side of the round billet crystallizer;
when the round billet crystallizer moves upwards, the heating element is electrified to heat, and the heating duration is 50% -100% of the upward movement duration of the round billet crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371276.3A CN110116193B (en) | 2019-05-06 | 2019-05-06 | Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910371276.3A CN110116193B (en) | 2019-05-06 | 2019-05-06 | Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110116193A CN110116193A (en) | 2019-08-13 |
| CN110116193B true CN110116193B (en) | 2021-05-07 |
Family
ID=67521717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910371276.3A Active CN110116193B (en) | 2019-05-06 | 2019-05-06 | Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110116193B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113828746B (en) * | 2021-09-22 | 2023-05-23 | 日照钢铁控股集团有限公司 | Method for evaluating flow field of crystallizer by using vibration mark distribution of casting blank |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04178240A (en) * | 1990-11-13 | 1992-06-25 | Nkk Corp | Continuous casting method for stainless steel |
| SE512692C2 (en) * | 1998-03-02 | 2000-05-02 | Abb Ab | Method and apparatus for continuous casting |
| CN2650907Y (en) * | 2003-09-16 | 2004-10-27 | 钢铁研究总院 | Crystallizer for continuous casting billets without vibratory defects |
| CN100566886C (en) * | 2007-12-06 | 2009-12-09 | 上海大学 | The metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification |
| CN103317108B (en) * | 2012-03-19 | 2016-06-01 | 宝山钢铁股份有限公司 | Continuous casting billet oscillation mark control method |
-
2019
- 2019-05-06 CN CN201910371276.3A patent/CN110116193B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110116193A (en) | 2019-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW201408397A (en) | Continuous casting mold and method for continuous casting of steel | |
| US2672665A (en) | Casting metal | |
| CA2510831C (en) | Controlled fluid flow mold and molten metal casting method for improved surface | |
| CN110116193B (en) | Round billet crystallizer, continuous casting equipment and continuous casting round billet oscillation mark suppression method | |
| CN110125346B (en) | Slab crystallizer, continuous casting equipment and continuous casting slab vibration mark suppression method | |
| JP5962733B2 (en) | Steel continuous casting method | |
| TWI655979B (en) | Steel continuous casting method | |
| JP6365604B2 (en) | Steel continuous casting method | |
| WO2018056322A1 (en) | Continuous steel casting method | |
| JP6428721B2 (en) | Continuous casting mold and steel continuous casting method | |
| JPH09220645A (en) | Method for lubricating wall of metallic mold for continuous casting and mold therefor | |
| JP3022211B2 (en) | Mold for continuous casting of round billet slab and continuous casting method using the mold | |
| RU2403121C1 (en) | Method of continuous steel casting | |
| JPH01113164A (en) | Method and apparatus for producting unidirectionally solidified ingot | |
| KR20110071511A (en) | Method for manufacturing austenitic stainless steel | |
| JP4058561B2 (en) | Metal continuous casting method and ingot mold for carrying out the method | |
| SU908487A2 (en) | Metal continuous casting method | |
| JP5691949B2 (en) | Continuous casting method for large-section slabs | |
| JPH07227653A (en) | Method and device for reducing shrinkage hole in continuous casting | |
| KR100679313B1 (en) | Apparatus for continuous casting of Magnesium billet or slab using high frequency electromagnetic field | |
| KR101243253B1 (en) | Casting roll of twin roll strip caster | |
| JPH03110043A (en) | Vertical type continuous casting apparatus for metal | |
| JP2024047887A (en) | Continuous casting mold, manufacturing method for continuous casting mold, and continuous casting method for steel | |
| JP3398608B2 (en) | Continuous casting method and mold for continuous casting | |
| JP2024047886A (en) | Continuous casting mold and method of manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |