CN103418761A - Polygon curved surface inner wall crystallizer for continuous casting of tube blank - Google Patents
Polygon curved surface inner wall crystallizer for continuous casting of tube blank Download PDFInfo
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- CN103418761A CN103418761A CN2013103475578A CN201310347557A CN103418761A CN 103418761 A CN103418761 A CN 103418761A CN 2013103475578 A CN2013103475578 A CN 2013103475578A CN 201310347557 A CN201310347557 A CN 201310347557A CN 103418761 A CN103418761 A CN 103418761A
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Abstract
The invention relates to the field of continuous casting or semicontinuous casting in the metallurgical industry, in particular to a polygon curved surface inner wall crystallizer for continuous casting of tube blank. The polygon curved surface inner wall crystallizer for the continuous casting of the tube blank is characterized in that the cross section of the inner wall of the crystallizer is a polygon curved surface. The polygon curved surface inner wall crystallizer can continuously pull the tube blank out from the crystallizer smoothly without bleed-out, guarantee the quality of the tube blank, and meet the demand for continuous or semicontinuous casting of hollow tube blank in practical production.
Description
Technical field
The present invention relates to metallurgy industry continuous casting or semi-continuous casting field, particularly polygon curved inner wall crystallizer for a kind of pipe continuous casting.
Background technology
Metallurgical boundary proposes the technical scheme of many continuous castings or semi-continuous casting hollow bloom for many years, but all in actual production, does not obtain application.Its key to the issue is that the crystallizer technology scheme does not meet production requirement.While solidifying, shrinking is the characteristic of steel, the crystallizer inwall of traditional employing circular cross section makes near the initial solidification base shell formed the Mold face tightly wrap the crystallizer inwall, now the inner base shell of pipe also is subject to the ferrostatic pressure effect, even at this moment take lubricant method and vibration also to be difficult to " demoulding ", the pulling force that the high temperature billet shell can bear in this case also is not enough to the frictional resistance between the inner base shell of customer service pipe and crystallizer inwall, pipe can not be pulled out continuously smoothly, result causes breaks bleed-out.
Summary of the invention
Be difficult to " demoulding " and easily cause the problem of breaking the bleed-out accident, the present invention to utilize " solidification shrinkage " characteristic of steel in order to solve above-mentioned traditional hollow bloom, polygon curved inner wall crystallizer for a kind of pipe continuous casting is provided.
Technical scheme of the present invention is: polygon curved inner wall crystallizer for a kind of pipe continuous casting, it is characterized in that, and the cross section of described knot crystallizer inwall is the polygon curved surface.
Described polygon curved surface is at least eight limits or angle, and the radius R w of arc-shaped edges is greater than the radius R n of arc chord angle, and when Rw is maximum, under limiting condition, arc-shaped edges becomes for straight line.
Transition between the radius R w of described arc-shaped edges and the radius R n of arc chord angle is that the two is tangent, or the two is tangent by one section straight line.
Described polygon curved surface is decile or non-decile.
Described crystallizer inwall is drilled with the water flowing Cooling Holes, and the water pipe of built-in plug or shutoff.
Described crystallizer inwall is 500mm-900mm along throwing direction length, and the up big and down small tapering of 1%-3% is arranged on its length direction.
Advantage of the present invention is: variable curved surface inwall crystallizer provided by the invention, can be smoothly continuously can bleed-out from pulling out in crystallizer by pipe, guaranteed the quality of pipe, met actual production hollow core pipe continuously or semi-continuous casting.
Below in conjunction with the embodiment drawings and Examples, the invention will be further described, but not as a limitation of the invention.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is crystallizer of the present invention cross section;
The schematic diagram of the nascent solidified shell that Fig. 2 is pipe of the present invention inside and the situation of contraction thereof;
In figure, 1, the crystallizer outer wall; 2, the outside base shell of pipe; 3, the inner base shell of pipe; 4, the cooling water inlet of crystallizer inwall; 5, crystallizer inwall; 6, water flowing Cooling Holes; 7, molten steel; 8, base shell shrinkage direction.
The specific embodiment
The schematic diagram that Fig. 1 is crystallizer of the present invention cross section, as can be seen from Figure, the cross section of crystallizer inwall 5 of the present invention, the contact-making surface of the inner base shell 3 of crystallizer inwall 5 and pipe, be the polygon curved surface.This design is the bleed-out problem of breaking while utilizing " solidification shrinkage " characteristic of steel to solve continuous casting or semi-continuous casting hollow bloom.The polygon curved surface is that every limit of a polygon is curve, and the outer surface that the polygon stretching obtains thus is the polygon curved surface.
The schematic diagram of the nascent solidified shell that Fig. 2 is pipe of the present invention inside and the situation of contraction thereof, as can be seen from Figure, arc-shaped edges part at crystallizer inwall 5 polygon curved surfaces, the inner base shell 3 of the pipe that initial stage forms has because of solidification shrinkage the trend that breaks away from crystallizer inwall 5, and, in the arc chord angle part of crystallizer inwall 5 polygon curved surfaces, the inner base shell 3 of the pipe that the initial stage forms packs tightly the trend of crystallizer inwall 5 because solidification shrinkage has.Due to Rw>=Rn, it is the radius that the arc-shaped edges radius of crystallizer inwall 5 is greater than crystallizer inwall 5 arc chord angles, the interface length that makes the inner base shell 3 of pipe break away from the part of crystallizer inwall 5 is greater than the interface length that the inner base shell 3 of pipe compresses the part of crystallizer inwall 5, on the cross section of whole crystallizer inwall 5, the inner base shell 3 of pipe has with the girth of crystallizer inwall 5 contact-making surfaces the trend that breaks away from crystallizer inwall 5, rather than tightly wrap crystallizer inwall 5, so just can guarantee is having under vibration and lubricated condition, continuously smoothly pipe is pulled out to crystallizer, avoid breaking the bleed-out accident.
Preferably, described multisided surface is at least eight limits or angle, and the radius R w of arc-shaped edges is greater than the radius R n of arc chord angle, and when Rw is maximum, arc-shaped edges can become for straight line.Wherein, the transition between Rw and Rn is that the two is tangent, or the two is tangent by one section straight line.Described multisided surface is decile or non-decile.
As further improvement project, described crystallizer inwall is drilled with the water flowing Cooling Holes, as shown in Figure 1, and the water pipe of built-in plug or shutoff.Plug or water pipe insert crystallizer inwall 5, and cooling water enters the water flowing Cooling Holes 6 of crystallizer inwall 5 by plug or water pipe.
Described crystallizer inwall 5 is 500mm-900mm along throwing direction length, according to the different solidification shrinkage rates of poured into a mould different steel grades, the up big and down small tapering of 1%-3% is arranged on its length direction.
Variable curved surface inwall crystallizer provided by the invention, can be smoothly continuously can bleed-out from pulling out in crystallizer by pipe, guaranteed the quality of pipe, met actual production hollow core pipe continuously or semi-continuous casting.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (6)
1. a polygon curved inner wall crystallizer for the pipe continuous casting, is characterized in that, the cross section of described knot crystallizer inwall is the polygon curved surface.
2. polygon curved inner wall crystallizer for a kind of pipe continuous casting according to claim 1, it is characterized in that, described polygon curved surface is at least eight limits or angle, and the radius R w of arc-shaped edges is greater than the radius R n of arc chord angle, when Rw is maximum, under limiting condition, arc-shaped edges becomes for straight line.
3. polygon curved inner wall crystallizer for a kind of pipe continuous casting according to claim 2, is characterized in that, the transition between the radius R w of described arc-shaped edges and the radius R n of arc chord angle is that the two is tangent, or the two is tangent by one section straight line.
4. polygon curved inner wall crystallizer for a kind of pipe continuous casting according to claim 1, is characterized in that, described polygon curved surface is decile or non-decile.
5. polygon curved inner wall crystallizer for a kind of pipe continuous casting according to claim 1, is characterized in that, described crystallizer inwall is drilled with the water flowing Cooling Holes, and the water pipe of built-in plug or shutoff.
6. polygon curved inner wall crystallizer for a kind of pipe continuous casting according to claim 1, is characterized in that, described crystallizer inwall is 500mm-900mm along throwing direction length, and the up big and down small tapering of 1%-3% is arranged on its length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347557.8A CN103418761B (en) | 2013-08-12 | 2013-08-12 | Polygon curved surface inner wall crystallizer for continuous casting of tube blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310347557.8A CN103418761B (en) | 2013-08-12 | 2013-08-12 | Polygon curved surface inner wall crystallizer for continuous casting of tube blank |
Publications (2)
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| CN103418761A true CN103418761A (en) | 2013-12-04 |
| CN103418761B CN103418761B (en) | 2015-05-27 |
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| CN201310347557.8A Active CN103418761B (en) | 2013-08-12 | 2013-08-12 | Polygon curved surface inner wall crystallizer for continuous casting of tube blank |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH543912A (en) * | 1971-04-09 | 1973-11-15 | Mitsubishi Heavy Ind Ltd | Method and device for the production of finned tubes |
| CN102248137A (en) * | 2011-07-22 | 2011-11-23 | 北京科技大学 | Continuous casting and direct forming die for copper clad aluminum composite material with irregular section, and preparation method thereof |
| CN202655584U (en) * | 2012-06-01 | 2013-01-09 | 中国重型机械研究院有限公司 | Crystallizer of hollow pipe billet |
| CN103084551A (en) * | 2013-01-25 | 2013-05-08 | 中冶京诚工程技术有限公司 | Non-vibrating demolding method of crystallizer used for continuous casting and crystallizer |
| CN203556820U (en) * | 2013-08-12 | 2014-04-23 | 中国重型机械研究院股份公司 | Crystallization device with polygonal curved inner wall used for continuous casting of tube blank |
-
2013
- 2013-08-12 CN CN201310347557.8A patent/CN103418761B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH543912A (en) * | 1971-04-09 | 1973-11-15 | Mitsubishi Heavy Ind Ltd | Method and device for the production of finned tubes |
| CN102248137A (en) * | 2011-07-22 | 2011-11-23 | 北京科技大学 | Continuous casting and direct forming die for copper clad aluminum composite material with irregular section, and preparation method thereof |
| CN202655584U (en) * | 2012-06-01 | 2013-01-09 | 中国重型机械研究院有限公司 | Crystallizer of hollow pipe billet |
| CN103084551A (en) * | 2013-01-25 | 2013-05-08 | 中冶京诚工程技术有限公司 | Non-vibrating demolding method of crystallizer used for continuous casting and crystallizer |
| CN203556820U (en) * | 2013-08-12 | 2014-04-23 | 中国重型机械研究院股份公司 | Crystallization device with polygonal curved inner wall used for continuous casting of tube blank |
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| CN103418761B (en) | 2015-05-27 |
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