CN211360645U - Continuous casting water gap for controlling carbon segregation - Google Patents
Continuous casting water gap for controlling carbon segregation Download PDFInfo
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- CN211360645U CN211360645U CN201922165801.4U CN201922165801U CN211360645U CN 211360645 U CN211360645 U CN 211360645U CN 201922165801 U CN201922165801 U CN 201922165801U CN 211360645 U CN211360645 U CN 211360645U
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- mouth
- river
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- carbon segregation
- water hole
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Abstract
The utility model discloses a mouth of a river is used in continuous casting of control carbon segregation, including the mouth of a river body, this internal water hole of crossing in mouth of a river, its characterized in that: the inner wall of the water hole is provided with a spiral rib along the anticlockwise direction, and the spiral rib enables the inner wall of the water hole to form an overflow channel rotating along the anticlockwise direction. By adopting the technical scheme, the nozzle casting flow generates anticlockwise rotation in the downflow process, the crystallizer electromagnetically stirs and selects clockwise rotation, columnar crystals at the front of solidification are broken by utilizing two opposite rotating forces of molten steel, the temperature of the molten steel in the crystallizer is uniform, the isometric crystal rate of the core part of a casting blank is improved, the quality of the casting blank is improved, the structure is reasonable, and the effect is obvious.
Description
Technical Field
The utility model belongs to the technical field of continuous casting, especially, relate to a water gap for continuous casting of control carbon segregation.
Background
The 82B steel wire rod is the main raw material for producing steel wires and steel strands for a high-strength and relaxed prestressed concrete structure. Because the PC steel wire and the steel strand are widely applied to the engineering fields of high-rise buildings, bridges, petrochemical industry, railways and the like, the 82B high-carbon wire rod is required to have stable chemical components, pure steel, excellent mechanical property, uniform metallographic structure and higher sorbite degree. However, the 82B wire rod is easy to be brittle during the stretching and drawing processes, thereby affecting the use performance of the wire rod. The brittle fracture wire rod is sampled, and metallographic and scanning electron microscope analysis shows that the carbon segregation of steel is the main cause of brittle fracture of the high-carbon wire rod. The utility model relates to a continuous casting mouth of a river of control high carbon wire rod continuous casting billet center carbon segregation.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides an improved the casting blank quality, rational in infrastructure, the continuous casting water gap that the effect is showing.
The utility model discloses a realize like this, a continuous casting water gap of control carbon segregation, including the mouth of a river body, this internal water hole, its characterized in that of crossing that is equipped with in mouth of a river: the inner wall of the water hole is provided with a spiral rib along the anticlockwise direction, and the spiral rib enables the inner wall of the water hole to form an overflow channel rotating along the anticlockwise direction.
In the technical scheme, the preferred water passing hole is 32 mm; the width of bead is 10mm, and the height of bead is 5 mm.
Above-mentioned technical scheme, it is preferred, the upper end in water hole is equipped with circular arc chamfer, and the chamfer radius is 35 mm. The blocking to the rivers is reduced, improves the effect of overflowing.
In the above technical solution, preferably, the cross section of the rib is formed in a rectangular shape.
The utility model has the advantages and technological effect: because the above technical scheme is adopted in the utility model, at spiral heliciform bead of mouth of a river inner wall design promptly, make mouth of a river casting flow produce an anticlockwise rotation at downflow process, crystallizer electromagnetic stirring selects clockwise rotation, utilizes two opposite directions's of molten steel revolving force, smashes the column crystal of solidification forward position, and the molten steel temperature in the even crystallizer improves the isometric crystal rate of casting blank core, has improved the casting blank quality, and is rational in infrastructure, and the effect is showing.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a portion I of fig. 1.
In the figure, 1, a water gap body; 1-1, water passing holes; 1-2, spiral convex edge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a nozzle for continuous casting, which controls carbon segregation, comprising a nozzle body 1, wherein a water through hole 1-1 is provided in the nozzle body, a spiral rib 1-2 is provided on an inner wall of the water through hole along an anticlockwise direction, and the spiral rib makes the inner wall of the water through hole form an overflow channel rotating along the anticlockwise direction.
When the method is actually applied to control the center carbon segregation of the high-carbon wire rod continuous casting billet, the insertion depth of the water gap applied to the crystallizer is 80-120 mm; and (3) continuous casting production section: 160mm square billets; electromagnetic stirring of a crystallizer: stirring clockwise with the current of 350A and the frequency of 3.5 Hz; solidifying the tail end through electromagnetic stirring: stirring clockwise with current of 500A and frequency of 8 Hz; the stirring direction of electromagnetic stirring of the crystallizer and the stirring direction of electromagnetic stirring at the solidification tail end are always kept in opposite directions for stirring; according to the technical scheme, the floating of molten steel inclusions is promoted, the inclusions in the casting blank are reduced, the central isometric crystal rate of the casting blank is improved, and the central carbon segregation index of the casting blank is reduced.
In the technical scheme, the diameter of the water through hole is preferably 32 mm; the width of bead is 10mm, and the height of bead is 5 mm.
Above-mentioned technical scheme, it is preferred, the upper end in water hole is equipped with circular arc chamfer, and the chamfer radius is 35 mm. The blocking to the rivers is reduced, improves the effect of overflowing.
In the above technical solution, preferably, the cross section of the rib forms a rectangle.
The utility model has the advantages and technological effect: because the above technical scheme is adopted in the utility model, at spiral heliciform bead of mouth of a river inner wall design promptly, make mouth of a river casting flow produce an anticlockwise rotation at downflow process, crystallizer electromagnetic stirring selects clockwise rotation, utilizes two opposite directions's of molten steel revolving force, smashes the column crystal of solidification forward position, and the molten steel temperature in the even crystallizer improves the isometric crystal rate of casting blank core, has improved the casting blank quality, and is rational in infrastructure, and the effect is showing.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention, such as changes in the size of the diameter of the water passing hole, the width of the rib, the height of the rib, etc., are possible; all should be included within the scope of the present invention.
Claims (4)
1. The utility model provides a mouth for continuous casting of control carbon segregation, includes the mouth of a river body, this internal water hole of crossing that is equipped with in mouth of a river, its characterized in that: the inner wall of the water hole is provided with a spiral rib along the anticlockwise direction, and the spiral rib enables the inner wall of the water hole to form an overflow channel rotating along the anticlockwise direction.
2. The nozzle for controlling carbon segregation of claim 1, wherein the water passing hole has a diameter of 32 mm; the width of bead is 10mm, and the height of bead is 5 mm.
3. The nozzle for continuous casting controlling carbon segregation as claimed in claim 1, wherein the upper end of the water through hole is provided with a circular chamfer with a radius of 35 mm.
4. The nozzle for controlling carbon segregation of claim 1, wherein the cross-section of the rib is formed in a rectangular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922165801.4U CN211360645U (en) | 2019-12-05 | 2019-12-05 | Continuous casting water gap for controlling carbon segregation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922165801.4U CN211360645U (en) | 2019-12-05 | 2019-12-05 | Continuous casting water gap for controlling carbon segregation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211360645U true CN211360645U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922165801.4U Active CN211360645U (en) | 2019-12-05 | 2019-12-05 | Continuous casting water gap for controlling carbon segregation |
Country Status (1)
| Country | Link |
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| CN (1) | CN211360645U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198994A (en) * | 2021-04-25 | 2021-08-03 | 东北大学 | Method for improving subcutaneous negative segregation in large round billet crystallizer in continuous casting process |
| CN114939651A (en) * | 2022-05-27 | 2022-08-26 | 东北大学 | Continuous casting tundish device with rotational flow function and technological method |
| CN117718467A (en) * | 2023-12-14 | 2024-03-19 | 东北大学 | Electromagnetic rotational flow enhanced submerged nozzle |
-
2019
- 2019-12-05 CN CN201922165801.4U patent/CN211360645U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198994A (en) * | 2021-04-25 | 2021-08-03 | 东北大学 | Method for improving subcutaneous negative segregation in large round billet crystallizer in continuous casting process |
| CN114939651A (en) * | 2022-05-27 | 2022-08-26 | 东北大学 | Continuous casting tundish device with rotational flow function and technological method |
| CN117718467A (en) * | 2023-12-14 | 2024-03-19 | 东北大学 | Electromagnetic rotational flow enhanced submerged nozzle |
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