CN115041675A - Composite water gap and preparation process thereof - Google Patents
Composite water gap and preparation process thereof Download PDFInfo
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- CN115041675A CN115041675A CN202210960664.7A CN202210960664A CN115041675A CN 115041675 A CN115041675 A CN 115041675A CN 202210960664 A CN202210960664 A CN 202210960664A CN 115041675 A CN115041675 A CN 115041675A
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- nozzle
- metal
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- composite
- composite nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention belongs to the technical field of metal casting, and particularly relates to a composite nozzle and a preparation process thereof. The design principle is simple, and the metal after the casting can be reused, so that the influence of the nozzle nodulation on continuous casting production is reduced, large-particle nodulation objects peeled off in the casting blank are eliminated, and the cleanliness level and quality of the casting blank are improved.
Description
Technical Field
The invention relates to the technical field of metal casting, in particular to a composite water gap and a preparation process thereof.
Background
The water gap in the field of metal casting plays a role in enabling molten steel to enter a tundish from a ladle and enter a crystallizer or a mold from the tundish or the ladle, and common water gaps comprise a submerged nozzle and a large-ladle long nozzle. Al-O type inclusions in molten steel can be deposited on the inner wall of a nozzle to cause nozzle blockage, and the smooth running of continuous casting production is influenced. The peeled nodules form large particle inclusions which can enter the casting blank and affect the internal cleanliness and quality of the casting blank. The large-particle inclusion can form product defects in the casting blank rolling process, and the quality of steel is seriously influenced.
The nozzle blockage prevention at the present stage adopts the design of a novel nozzle shape, coating on the inner wall of the nozzle, molten steel calcium treatment or reduction of Al-O and other types of impurities in steel to reduce the nozzle blockage, but the prior art has the following problems:
the novel nozzle shape is designed to improve the flow field of molten steel in the nozzle to reduce nozzle blockage, so that the nozzle nodulation problem cannot be effectively reduced;
the inner wall of the water gap is coated with the coating, and in the using process, along with the molten steel casting, the coating on the inner wall of the water gap becomes thinner under the scouring and reaction of the molten steel, the erosion of the inner wall of the water gap becomes faster, and the service life of the water gap is shorter;
the addition amount of calcium needs to be strictly controlled during calcium treatment, and the industrial production process has certain difficulty. There are a considerable number of steel grades which do not allow the use of calcium treatment, such as bearing steel and automotive sheet, and the problem of nozzle clogging still remains.
The quantity of the inclusions in the molten steel is reduced through technological improvement measures, but the inclusions in the molten steel cannot be completely removed, and the inclusions in the steel can be reduced only to a certain extent, but the problem of nozzle nodulation caused by the inclusions still exists.
Disclosure of Invention
The invention mainly aims to provide a composite nozzle and a preparation process thereof, which can reduce the nozzle clogging and nodulation according to the fluid mechanics principle and the inclusion motion analysis.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
the utility model provides a compound mouth of a river, includes mouth of a river body and metal inside lining, and the melting point of metal is higher than the temperature of the molten steel that compound mouth of a river flowed through.
As a preferable aspect of the composite nozzle of the present invention, wherein: the composite water gap comprises a ladle long water gap and an immersion water gap.
As a preferable aspect of the composite nozzle of the present invention, wherein: the metal lining is positioned in the area below the slag line on the inner wall of the water gap body.
As a preferable aspect of the composite nozzle of the present invention, wherein: the metal is a pure metal or a metal alloy.
As a preferable aspect of the composite nozzle of the present invention, wherein: the material of the nozzle body is a refractory material commonly used in the field, and the refractory material comprises aluminum carbon, aluminum zirconium carbon, magnesium carbon and the like.
As a preferable aspect of the composite nozzle of the present invention, wherein: the surface roughness Ra of the metal lining is less than or equal to 12.5 mu m, the surface refers to the surface which is in contact with molten steel, and the surface which is in contact with the nozzle body is not required.
As a preferable aspect of the composite nozzle of the present invention, wherein: the metal lining and the water gap body are fixed in a mechanical combination mode; preferably, the metal lining is inlaid in the inner wall of the nozzle body.
In order to solve the above technical problem, according to another aspect of the present invention, the present invention provides the following technical solutions:
the preparation process of the composite nozzle processes the inner wall of the nozzle body, and inlays the metal lining on the inner wall of the nozzle body.
As a preferable aspect of the composite nozzle of the present invention, wherein: the area for processing the inner wall of the water gap body is the area below the slag line of the inner wall of the water gap body.
The invention also provides an application of the composite nozzle in molten steel continuous casting or die casting process.
The invention also provides an application of the composite nozzle prepared by the preparation process in molten steel continuous casting or die casting processes.
The invention has the following beneficial effects:
the invention provides a composite nozzle and a preparation process thereof.A metal with smooth wall surface and higher melting point than molten steel flowing through the composite nozzle is embedded in a nozzle body, so that the surface smoothness of the metal does not change in the casting process, and the smooth wall surface state is not beneficial to the deposition of impurities in the steel on the wall surface, thereby avoiding nozzle nodules and fundamentally avoiding the formation of the nozzle nodules. The design principle is simple, and the metal after the casting can be reused, so that the influence of the nozzle nodulation on continuous casting production is reduced, large-particle nodulation objects peeled off in the casting blank are eliminated, and the cleanliness level and quality of the casting blank are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a composite nozzle in embodiment 1 of the present invention;
fig. 2 is a schematic view of a composite nozzle in embodiment 2 of the present invention.
The reference numbers indicate:
1-a nozzle body, 2-a metal lining and 3-a slag line.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Compared with the traditional water gap, the wall part of the water gap below a slag line contacted with molten steel is replaced by metal, the roughness degree of the metal surface is far less than that of the material of the water gap body, the roughness degree of the wall surface of the water gap is not obviously changed along with the casting process, the water gap with the smooth wall surface has smaller nodulation tendency according to the fluid mechanics principle, and the service life of the water gap can be prolonged; the water gap is simple in structure and easy for batch production, and the metal lining can be recycled after being used, so that the production cost is saved.
The technical solution of the present invention is further illustrated by the following specific examples.
Example 1
As shown in fig. 1, the present embodiment provides a composite nozzle, which is a ladle long nozzle and includes a nozzle body 1 and a metal liner 2; a metal lining 2 is embedded in the area below the slag line 3 on the inner wall of the nozzle body 1. In this embodiment, the metal is titanium, and the surface roughness Ra is less than or equal to 12.5 μm. In this embodiment, the shape of the metal liner and the installation position thereof are as shown in fig. 1. The smooth metal lining in the water gap body can avoid the influence of impurities in the molten steel entering a tundish from a steel ladle and entering a crystallizer or a mold from the steel ladle, and reduce the adhesion of the impurities in the steel on the inner wall of the long water gap of the steel ladle.
Example 2
As shown in fig. 2, the present embodiment provides a composite nozzle, which is a submerged entry nozzle and includes a nozzle body 1 and a metal lining 2; the area below the slag line 3 on the inner wall of the nozzle body 1 is embedded with a metal lining 2. The metal is titanium alloy, the surface roughness Ra of the metal is less than or equal to 12.5 μm, and the shape and the installation position of the metal lining are shown in figure 2 in the embodiment. This internal smooth metal inside lining of water gap in this embodiment can avoid the molten steel to enter into the influence that crystallizer or mould in-process inclusion brought by the tundish, reduces the bonding of inclusion at immersion nozzle inner wall in the steel to alleviate immersion nozzle nodulation.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the content of the present specification or other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a compound mouth of a river which characterized in that, includes mouth of a river body and metal inside lining, and the melting point of metal is higher than the temperature of the molten steel that compound mouth of a river flowed through.
2. The composite nozzle of claim 1, wherein said composite nozzle comprises a ladle shroud, a submerged entry nozzle.
3. A composite nozzle as claimed in claim 1, wherein said metal liner is located in the region of the inner wall of the nozzle body below the slag line.
4. A composite nozzle as claimed in claim 1, wherein said metal is a pure metal or a metal alloy.
5. The composite nozzle of claim 1, wherein said nozzle body material comprises aluminum carbon, aluminum zirconium carbon, magnesium carbon.
6. A composite nozzle as claimed in claim 1, wherein the metal liner has a surface roughness Ra ≤ 12.5 μm.
7. A composite nozzle as claimed in claim 1, wherein said metal liner is mounted to the inner wall of the nozzle body.
8. A process for preparing a composite nozzle as claimed in any one of claims 1 to 7, comprising:
and processing the inner wall of the water gap body, and inlaying the metal lining on the inner wall of the water gap body.
9. The manufacturing process according to claim 8, wherein the area in which the inner wall of the nozzle body is processed is an area below a slag line of the inner wall of the nozzle body.
10. Use of a composite nozzle as claimed in any one of claims 1 to 7 or a composite nozzle made by a process as claimed in any one of claims 8 to 9 in a continuous casting or die casting process of molten steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960664.7A CN115041675A (en) | 2022-08-11 | 2022-08-11 | Composite water gap and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960664.7A CN115041675A (en) | 2022-08-11 | 2022-08-11 | Composite water gap and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115041675A true CN115041675A (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210960664.7A Pending CN115041675A (en) | 2022-08-11 | 2022-08-11 | Composite water gap and preparation process thereof |
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| Country | Link |
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| CN (1) | CN115041675A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04279258A (en) * | 1991-03-06 | 1992-10-05 | Nippon Steel Corp | Molten metal supplying nozzle for continuous casting |
| CN1330577A (en) * | 1998-12-15 | 2002-01-09 | 维苏维尤斯·克鲁斯布公司 | Pouring tube |
| CN1697714A (en) * | 2003-01-20 | 2005-11-16 | 维苏维尤斯集团有限公司 | Casting tube, clamping device for a casting tube and casting machine |
| CN1796028A (en) * | 2004-12-24 | 2006-07-05 | 中钢集团洛阳耐火材料研究院 | Anti sealed immersion nozzle in use for continuous casting specific steel |
| CN201752762U (en) * | 2010-04-07 | 2011-03-02 | 河南省西保冶材集团有限公司 | Fire-resistant water gap used for steelmaking |
| CN105636723A (en) * | 2013-10-14 | 2016-06-01 | 维苏威集团有限公司 | Coupling device for reversibly coupling a ladle shroud to a collector nozzle, self-supported ladle shroud, kit thereof and method for coupling a ladle shroud to a collector nozzle |
-
2022
- 2022-08-11 CN CN202210960664.7A patent/CN115041675A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04279258A (en) * | 1991-03-06 | 1992-10-05 | Nippon Steel Corp | Molten metal supplying nozzle for continuous casting |
| CN1330577A (en) * | 1998-12-15 | 2002-01-09 | 维苏维尤斯·克鲁斯布公司 | Pouring tube |
| CN1697714A (en) * | 2003-01-20 | 2005-11-16 | 维苏维尤斯集团有限公司 | Casting tube, clamping device for a casting tube and casting machine |
| CN1796028A (en) * | 2004-12-24 | 2006-07-05 | 中钢集团洛阳耐火材料研究院 | Anti sealed immersion nozzle in use for continuous casting specific steel |
| CN201752762U (en) * | 2010-04-07 | 2011-03-02 | 河南省西保冶材集团有限公司 | Fire-resistant water gap used for steelmaking |
| CN105636723A (en) * | 2013-10-14 | 2016-06-01 | 维苏威集团有限公司 | Coupling device for reversibly coupling a ladle shroud to a collector nozzle, self-supported ladle shroud, kit thereof and method for coupling a ladle shroud to a collector nozzle |
Non-Patent Citations (2)
| Title |
|---|
| 王德永: "《洁净钢与清洁辅助原料》", 31 July 2017, 冶金工业出版社 * |
| 胡世平等: "《短流程炼钢用耐火材料》", 30 September 2001, 北京：冶金工业出版社 * |
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Application publication date: 20220913 |