CN102527959A - Combined crystallizer - Google Patents
Combined crystallizer Download PDFInfo
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- CN102527959A CN102527959A CN2011104345765A CN201110434576A CN102527959A CN 102527959 A CN102527959 A CN 102527959A CN 2011104345765 A CN2011104345765 A CN 2011104345765A CN 201110434576 A CN201110434576 A CN 201110434576A CN 102527959 A CN102527959 A CN 102527959A
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- material layer
- fourplatemold
- insulation material
- crystallizer
- bight
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Abstract
The invention provides a combined crystallizer, which comprises a wide board, a narrow board and a heat-insulation material layer attached to the corner portion on the outer side of the narrow board. The combined crystallizer can improve the cooling quality of the corner position of a blank casing and avoid cracks.
Description
Technical field
The present invention relates to a kind of fourplatemold, more particularly, the present invention relates to a kind of fourplatemold that solidifies quality that can improve the continuous casting billet bight.
Background technology
Crystallizer is the copper mold of a water-cooled, is the very important parts of conticaster, is called as " heart " of conticaster.Molten steel cools off in crystallizer, preliminary solidification forming, and have certain thickness base shell, and this process is continuous at base shell and crystallizer wall, completion under the relative motion.Therefore crystallizer should have good and uniform thermal conductivity and rigidity, so that process of setting evenly, steadily.
Crystallizer of the prior art is made up of the steel construction of copper coin or copper pipe and outside, and the effect of copper coin or copper pipe is the heat transferred cooling water with molten steel.Such crystallizer generally has two types: (1) inner surface does not have the crystallizer of coating or coating; (2) inner surface is plated a layer thickness and is about the crystallizer of (like the alloy of nickel or chromium) of 20-80 micron, the metal or alloy more wear-resisting than copper; The purpose that increases this coating is to improve crystallizer service life and slows down the copper coin wearing and tearing, but can not change the original heat conductivility of crystallizer.And in the production of current continuous casting, the heat conductivility of crystallizer is the key factor of appreciable impact continuous casting billet quality.
No matter be the crystallizer of any type, the heat radiation form that the base shell that has solidified contacts with the crystallizer inwall can be regarded as the one dimension heat radiation, and the heat radiation form that the base shell corner angle that solidify contact with the crystallizer internal cavity corner angle can be regarded as the two dimension heat radiation.The heat transfer efficiency of corners is far above the heat transfer efficiency at other positions.The appearance of this situation often causes edges and corners sharply to be cooled off, and has a strong impact on to solidify quality even crackle occurs.
Patent CN1401449A has announced a kind of mould product with heat insulation and wear-resistant coating that is applicable in the continuous casting installation for casting.This mould product is with water jacket in the outside of crystallizer copper wall; Tong Bi top in crystallizer scribbles heat insulation and wear-resistant coating; The difference of heat dissipation environment but this patent is not considered; Special influence to the continuous casting billet corner angle produce can't take into account corner angle and solidify quality in the surface quality of effectively improving continuous casting billet and internal soundness.
More general way is, considers the even cooling of strand, and it is excessive at copper pipe four jiaos fillet to be set, but this method still can't solve the inhomogeneous cooling problem of corner angle.
Summary of the invention
To the problems referred to above of the prior art, the invention provides a kind of fourplatemold, said fourplatemold comprises wide plate and narrow boards and invests insulation material layer on the bight, the outside of narrow boards.
Alternatively, said insulation material layer can be for the equal thickness insulation material layer that has 30 ° of-75 ° of chamferings, not with the equal thickness insulation material layer of chamfering, and wherein, the thickness of said insulation material layer can be 0.2mm～5mm.
Alternatively, said insulation material layer is the insulation material layer of equal thickness not, and the thickness of said insulation material layer is smoothly transitted into the 0.5mm～5mm of corners from 0.2mm～2mm.
Alternatively, the length of said insulation material layer be said narrow boards width 1/10～1/4.
Alternatively, said insulation material layer is formed by little cermet material or the metal of thermal conductivity factor high temperature resistant, corrosion-resistant, thermal conductivity ratio copper.
Description of drawings
Through the detailed description of carrying out below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention and characteristics will become apparent, in the accompanying drawings:
Fig. 1 shows according to an exemplary embodiment of the present the structural representation of 1 fourplatemold;
Fig. 2 shows according to an exemplary embodiment of the present the structural representation of 3 fourplatemold;
Fig. 3 shows according to an exemplary embodiment of the present the structural representation of 3 fourplatemold.
The specific embodiment
Hereinafter, will describe fourplatemold according to an exemplary embodiment of the present invention in detail with reference to accompanying drawing.
In the prior art, the base shell bight in the crystallizer is owing to the acting in conjunction that receives two crystallizer walls is in the Two-Dimensional Heat state, thereby its heat flow sharply cools off the bight greatly; Thereby cause base shell bight to receive the stress effect; Base shell bight forms longitudinal corner crack when serious under the stress effect, and because sharply cool off in the bight initial solidification shell is shunk early, forms non-uniform gap at the very start from solidifying; Cause thermal resistance sharply to increase, influence the base shell and evenly grow.No matter be that inner surface does not have the crystallizer of coating or coating or the crystallizer that inner surface is plated coating or coating, all can't change the original thermal conductivity of crystallizer.
Based on above-mentioned situation,, the invention provides a kind of fourplatemold that can improve the bight condensation quality of continuous casting billet in order to improve the even problem of crystallizer bight inhomogeneous cooling.The present invention has the material of heat insulating function in the work wall leptoprosopy of fourplatemold outside bight coating or attaching; Guaranteeing under the prerequisite of existing crystallizer to technological normal use such as casting billet surface and heart portion quality control level and realization on-line width adjustments; The specific heat load of leptoprosopy in the bight two dimension heat radiation of reduction base shell; The bight cooling velocity is slowed down; Both avoided owing to sharply cooling off influence and the destruction of the stress of generation, avoided influencing the even growth of base shell again, made base shell property at parts of edges and corners Homogeneouslly-radiating owing to the uncontrolled increase of thermal resistance that the initial solidification shell non-uniform gap that morning, contraction formed causes to base shell bight.
Fourplatemold can or attach one deck heat-barrier material at the outside corner angle position coating of the cooling wall leptoprosopy of fourplatemold according to an exemplary embodiment of the present invention, and the wide face of fourplatemold remains unchanged.
Said heat-barrier material can adopt the method for thermal spraying of the prior art, plating, chemical plating to make coated layer and matrix strong bonded, and the method that also can adopt welding, adheres to makes heat-barrier material sheet and matrix bond.
Said heat-barrier material can be made up of materials such as little cermet material of thermal conductivity factor high temperature resistant, corrosion-resistant, thermal conductivity ratio copper and metals.Wherein, cermet material is the material by the phase composition of ceramic hard and metal or alloy bonding, and cermet has characteristics such as high strength, high rigidity, wear-resistant, high temperature resistant, anti-oxidant and chemical stability.
The present invention can be through sneaking into the ultrafine ceramic powder end in electroplate liquid; Employing by plating as anode; With metal ion attached to matrix in, the technology of again the ultrafine ceramic powder end that suspends in the solution being brought into obtains required cermet material coatings.Wherein, the wall of crystallizer can be for copper.
The cover width of insulation material layer on crystallizer leptoprosopy wall be fourplatemold the leptoprosopy width 1/10～1/4, and said insulation material layer can be have the equal thickness insulation material layer of 30 ° of-75 ° of chamferings, not with the equal thickness insulation material layer or the non-equal thickness insulation material layer of chamfering.Wherein, the chamfering that has an equal thickness insulation material layer of chamfering preferably can be 45 °.Adopt the fourplatemold of the insulation material layer of being with chamfering not fragile in crystallizer installation, transportation.
In addition; About the insulation material layer of equal thickness and the insulation material layer of non-equal thickness; Since the crystallizer bight the closer to the edge thermolysis strong more, can have a negative impact to continuous casting quality but not fringe region reduces thermal conductivity excessively, evenly excessive in order to make effect of heat insulation; When adopting the bigger material of coefficient of heat insulation, using not, the insulation material layer of equal thickness can make effect of heat insulation more reasonable in the institute overlay area.
When insulation material layer is the coating of equal thickness, thickness range can for 0.2～5mm when insulation material layer is the insulation material layer of not equal thickness, thickness can be smoothly transitted into 0.5～5mm of thick from 0.2～2mm of sake.
Hereinafter, will combine accompanying drawing to specify exemplary embodiment of the present invention.
Embodiment 1
As shown in Figure 1,1 fourplatemold has the on-line width adjustment function and can improve the quality of solidifying in continuous casting billet bight according to an exemplary embodiment of the present.This fourplatemold comprises fourplatemold wide plate 1, fourplatemold narrow boards 2 and invests the equal thickness insulation material layer 3 that has 45 ° of chamferings on the bight of fourplatemold narrow boards 2.In embodiment 1, the work wall leptoprosopy of fourplatemold is of a size of 120mm, and the width that has the equal thickness insulation material layer 3 of 45 ° of chamferings is 20mm, and thickness is 1mm.In embodiment 1, on the inwall of crystallizer, be formed with coated layer.In embodiment 1, the equal thickness insulation material layer 3 that has 45 ° of chamferings comprises by weight 85% Ni and 15% Al
2O
3
As shown in Figure 2,2 fourplatemold does not have the on-line width adjustment function according to an exemplary embodiment of the present, and can improve the continuous casting billet bight and solidify quality.The difference of the fourplatemold of this fourplatemold and embodiment 1 is that the fourplatemold of embodiment 2 does not comprise the equal thickness insulation material layer 3 that has 45 ° of chamferings, but comprises the metal coating 4 of the equal thickness of not being with chamfering.In embodiment 2, the work wall leptoprosopy of fourplatemold is of a size of 120mm, and the width with the metal coating 4 of the equal thickness of chamfering is not 15mm, and thickness is 2mm.In embodiment 2, on the inwall of crystallizer, do not form coated layer.In embodiment 2, metal coating 4 comprises by weight 90% Cr and 10% ZrO
2
As shown in Figure 3; The difference of the fourplatemold of 3 fourplatemold and embodiment 1 is according to an exemplary embodiment of the present; The fourplatemold of embodiment 3 does not comprise the equal thickness insulation material layer 3 that has 45 ° of chamferings, but comprises the not insulation material layer 5 of equal thickness.Wherein, the thickness of the insulation material layer 5 of equal thickness can not be smoothly transitted into the 3mm of corners from 1.5mm.In addition, in embodiment 3, on the inwall of crystallizer, do not form coated layer.In addition, in embodiment 3, the insulation material layer 5 of equal thickness does not comprise by weight 90% Ni and 10% Al
2O
3
Fourplatemold according to an exemplary embodiment of the present invention; Through cover thermal insulation layer in the bight; Can make the hot-fluid in bight reduce 20%-40%; Thereby the problem that the heat radiation that effectively improves the bight is too fast has reduced because the defectives such as bight cracking that the rapid cooling that the two dimension heat radiation in bight causes causes.
In addition, fourplatemold has following advantage according to an exemplary embodiment of the present invention: the first, and fourplatemold of the present invention is simple in structure, small investment, be easy to realize and safeguard; The second, fourplatemold of the present invention does not influence the on-line width adjustment technology of prior art to the quality control level and the fourplatemold of continuous casting billet surface and heart portion; The 3rd, fourplatemold of the present invention makes the temperature of base shell corner positions reduce minimizing, thereby makes the bubble that forms owing to shrinkage factor is little little, helps the base shell evenly to grow; The 4th, the present invention can be widely used in inner surface does not have the fourplatemold of coating or coating and the fourplatemold that the inner surface plating has the metal or alloy more wear-resisting than copper.
Although illustrated and described exemplary embodiment of the present invention with reference to accompanying drawing, scope of the present invention is limited claim and equivalent thereof.Without departing from the scope of the invention, can carry out various modifications and distortion.
Claims (8)
1. fourplatemold is characterized in that said fourplatemold comprises wide plate and narrow boards and invests insulation material layer on the bight, the outside of narrow boards.
2. fourplatemold according to claim 1 is characterized in that said insulation material layer is the equal thickness insulation material layer that has 30 ° of-75 ° of chamferings.
3. fourplatemold according to claim 1 is characterized in that said insulation material layer is not for the equal thickness insulation material layer of chamfering.
4. according to claim 2 or 3 described fourplatemolds, it is characterized in that the thickness of said insulation material layer is 0.2mm～5mm.
5. fourplatemold according to claim 1 is characterized in that said insulation material layer is the insulation material layer of equal thickness not.
6. fourplatemold according to claim 5 is characterized in that the thickness of said insulation material layer is smoothly transitted into the 0.5mm～5mm of corners from 0.2mm～2mm.
7. fourplatemold according to claim 1, the length that it is characterized in that said insulation material layer be said narrow boards width 1/10～1/4.
8. fourplatemold according to claim 1 is characterized in that said insulation material layer is formed by little cermet material or the metal of thermal conductivity factor high temperature resistant, corrosion-resistant, thermal conductivity ratio copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104345765A CN102527959A (en) | 2011-12-22 | 2011-12-22 | Combined crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104345765A CN102527959A (en) | 2011-12-22 | 2011-12-22 | Combined crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102527959A true CN102527959A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104345765A Pending CN102527959A (en) | 2011-12-22 | 2011-12-22 | Combined crystallizer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3142196A1 (en) * | 1981-10-24 | 1983-05-11 | Mishima Kosan Corp., Kitakyushu, Fukuoka | Continuous casting mould with different coating layers of metal, and process for the manufacture thereof |
| CN1215638A (en) * | 1997-10-25 | 1999-05-05 | Km欧洲钢铁股份有限公司 | Mould for continuous casting apparatus |
| CN2776595Y (en) * | 2005-03-07 | 2006-05-03 | 鞍钢集团新钢铁有限责任公司 | Profile crystallizer for plate blank continuous casting |
| CN202387925U (en) * | 2011-12-22 | 2012-08-22 | 莱芜钢铁集团有限公司 | Combined type crystallizer |
-
2011
- 2011-12-22 CN CN2011104345765A patent/CN102527959A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3142196A1 (en) * | 1981-10-24 | 1983-05-11 | Mishima Kosan Corp., Kitakyushu, Fukuoka | Continuous casting mould with different coating layers of metal, and process for the manufacture thereof |
| CN1215638A (en) * | 1997-10-25 | 1999-05-05 | Km欧洲钢铁股份有限公司 | Mould for continuous casting apparatus |
| CN2776595Y (en) * | 2005-03-07 | 2006-05-03 | 鞍钢集团新钢铁有限责任公司 | Profile crystallizer for plate blank continuous casting |
| CN202387925U (en) * | 2011-12-22 | 2012-08-22 | 莱芜钢铁集团有限公司 | Combined type crystallizer |
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Application publication date: 20120704 |