CN201455212U - Copper tube for continuous casting of square billet, round billet and rectangular billet - Google Patents
Copper tube for continuous casting of square billet, round billet and rectangular billet Download PDFInfo
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- CN201455212U CN201455212U CN2009201107693U CN200920110769U CN201455212U CN 201455212 U CN201455212 U CN 201455212U CN 2009201107693 U CN2009201107693 U CN 2009201107693U CN 200920110769 U CN200920110769 U CN 200920110769U CN 201455212 U CN201455212 U CN 201455212U
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- copper pipe
- billet
- coating
- copper tube
- continuous casting
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Abstract
一种用于方坯、圆坯及矩形坯连铸的铜管，属于冶金行业的连铸设备领域。包括铜管本体(2)、外壁隔热镀层(3)、内壁耐磨镀层(4)，铜管本体(2)外表面上部分区域带有隔热镀层(3)，内表面带有耐磨镀层(4)；铜管的高度为700～1000mm，铜管的壁厚为14～30mm。铜管的高度为700～1000mm。优点在于，铜管能够减小钢液面及其之下300～400mm区域的热流密度30％～50％，降低钢液初期凝固前沿的温度梯度，提高铸坯等轴晶率，改善铸坯的内部质量。
The utility model relates to a copper pipe used for continuous casting of square billets, round billets and rectangular billets, belonging to the field of continuous casting equipment in the metallurgical industry. Including the copper pipe body (2), the outer wall heat-insulating coating (3), the inner wall wear-resistant coating (4), the outer surface of the copper pipe body (2) has a heat-insulating coating (3), and the inner surface has a wear-resistant coating Plating layer (4); the height of the copper tube is 700-1000 mm, and the wall thickness of the copper tube is 14-30 mm. The height of the copper tube is 700-1000mm. The advantage is that the copper tube can reduce the heat flux density of the molten steel surface and the area 300-400mm below it by 30% to 50%, reduce the temperature gradient at the front of the initial solidification of the molten steel, increase the equiaxed crystal ratio of the slab, and improve the internal quality.
Description
Technical field
The utility model belongs to the continuous casting installation for casting field of metallurgy industry, particularly a kind of copper pipe that is used for square billet, circle base and rectangular billet caster.
Background technology
Defectives such as the segregation of continuous casting billet and crackle are the inhomogeneity key factors of intensity, toughness, service life and structure property that influences steel, and the gross segregation problem of high-carbon, high-alloy steel continuous casting billet is a puzzlement continuous casting circle key technical problem for many years.The equiaxial crystal ratio, the thinning solidification structure that improve strand are the important means that alleviates the continuous casting billet center segregation.At present the technical measures that adopt mainly comprise and reduce superheat of liquid steel, gently depress with electromagnetic agitation etc., and in addition, the control that crystallizer conducts heat also has facilitation to the raising of strand equiaxial crystal ratio.
Solidifying of molten steel originates in crystallizer, and crystallizer is as the core component of conticaster, and its effect is the band liquid core strand that obtains to have Reasonable Shape and certain intensity.The heat transfer that slows down crystallizer top has the following advantages: (1) improves the uniformity of initial solidification thickness of the shell growth, suppresses the generation of slab surface crack; (2) thermograde of reduction solidification front suppresses the growth of column crystal, realizes the transformation of column crystal to equiax crystal in advance, thereby increases substantially the equiaxial crystal ratio of strand, reduces center segregation and loose degree.
With the heat transfer that slows down crystallizer top is target, patent 98119193.2 has proposed the crystallizer made by high conductivity material, its target is to improve the surface quality of continuous casting billet, principal character be provided with at outer surface a kind of than the crystallizer body coating material of low heat conductivity more, coating is single nickel and nickel alloy, at the coating of crystallizer upper semisection outer surface, this patent does not quantize explanation to the particular location of its thickness of coating and setting.Patent 02131319.9 has proposed a kind of mould product with heat insulation and wear-resistant coating, its target is to improve the internal soundness of strand, principal character be coated with on inner surface top a kind of than the crystallizer body heat insulation and wear resistance material of low heat conductivity more, thickness of coating is 0.2～5.0mm, the coating material is cermet material and metal material, but because the difference of the thermal coefficient of expansion of this heat-barrier material and crystallizer bulk material is bigger, therefore very high to adhesive force, the requirement of coating surface smoothness of coating and crystallizer body, be difficult to form industrial scale.
Summary of the invention
The purpose of this utility model is to provide a kind of copper pipe that is used for square billet, circle base and rectangular billet caster, and it is simple in structure, easy to make, the improved effect of strand internal soundness obvious, satisfy production requirement service life.
The utility model comprises copper pipe body, outer wall thermal barrier coating, inwall scuff-resistant coating, and zone, this external surface of copper pipe top has thermal barrier coating, and inner surface has scuff-resistant coating.The height of copper pipe is 700～1000mm, and the strand cross section of being cast is square, circle or rectangle, and the length of side of square billet or rectangular bloom is 120～380mm, and the diameter of circle base is 150～300mm, and it is constant that the wall thickness of copper pipe keeps, and is 14～30mm.
The top of the thermal barrier coating of outer surface of tube wall is 40～60mm apart from the minimum range s of copper pipe upper limb, and the bottom of the thermal barrier coating 3 of outer surface of tube wall is 1/2 of a copper pipe total height apart from the distance H of copper pipe upper limb, and the total inner surface of copper pipe body has all plated scuff-resistant coating 4.
Copper pipe can reduce the molten steel face and under the heat flow density 30%～50% in 300～400mm zone, reduce the thermograde of molten steel initial stage solidification front, improve the strand equiaxial crystal ratio, improve the internal soundness of strand.
Description of drawings
Fig. 1 is a structure chart of the present utility model.Wherein, molten steel face 5 in the thermal barrier coating 3 of Crystallizer tube 1, silver-bearing copper pipe 2, outer surface of tube wall, the scuff-resistant coating 4 of inner surface of tube wall, the Crystallizer tube, the top of the thermal barrier coating of s vial wall outer surface is apart from the minimum range of Crystallizer tube upper limb, H be the bottom of thermal barrier coating of outer surface of tube wall apart from the distance of Crystallizer tube upper limb, D2 and D3 represent the wall thickness of the first half copper pipe body and outer wall thermal barrier coating respectively.
The specific embodiment
The utility model comprises copper pipe body, outer wall thermal barrier coating, inwall scuff-resistant coating, and zone, this external surface of copper pipe top has thermal barrier coating, and inner surface has scuff-resistant coating.The height of copper pipe is 700～1000mm, and the strand cross section of being cast is square, circle or rectangle, and the length of side of square billet or rectangular bloom is 120～380mm, and the diameter of circle base is 150～300mm, and it is constant that the wall thickness of copper pipe keeps, and is 14～30mm.
The material that constitutes the copper pipe body 2 of copper pipe is the chromium zirconium copper that the silver-bearing copper of silver content 0.08wt.%～0.09wt.% or the beryllium-bronze that contains beryllium amount 0.2wt.%～0.5wt.% or chromium and zirconium content are respectively 0.60wt.%～0.70wt.% and 0.08wt.%～0.12wt.%, the thermal barrier coating 3 of copper pipe outer surface is composited by nickel and nickel-chromium alloy, chromium content is 20wt.%～30wt.% in the nickel-chromium alloy, the scuff-resistant coating 4 of copper pipe plating inner surface is a nickel cobalt (alloy), and wherein cobalt content is 10wt.%～20wt.%.
The Application of Copper target be reduce molten steel face 5 in the copper pipe and under the heat flow density 30%～50% in 300～400mm zone, reduce the thermograde of molten steel initial stage solidification front, improve the strand equiaxial crystal ratio, improve the internal soundness of strand.
Claims (3)
1. copper pipe that is used for square billet, circle base and rectangular billet caster, it is characterized in that, comprise copper pipe body (2), outer wall thermal barrier coating (3), inwall scuff-resistant coating (4), zone, copper pipe body (2) outer surface top has thermal barrier coating (3), and inner surface has scuff-resistant coating (4); The height of copper pipe is 700～1000mm, and the wall thickness of copper pipe is 14～30mm.The height of copper pipe is 700～1000mm.
2. copper pipe according to claim 1 is characterized in that, described square billet, the rectangular bloom cross section length of side are 120～380mm, and the diameter of circle base is 150～300mm.
3. copper pipe according to claim 1, it is characterized in that: the top of the thermal barrier coating of outer surface of tube wall (3) is 40～60mm apart from the minimum range s of copper pipe upper limb, the bottom of the thermal barrier coating of outer surface of tube wall (3) is 1/2 of a copper pipe total height apart from the distance H of copper pipe upper limb, and the total inner surface of copper pipe body (2) has all plated scuff-resistant coating (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201107693U CN201455212U (en) | 2009-08-12 | 2009-08-12 | Copper tube for continuous casting of square billet, round billet and rectangular billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201107693U CN201455212U (en) | 2009-08-12 | 2009-08-12 | Copper tube for continuous casting of square billet, round billet and rectangular billet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201455212U true CN201455212U (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201107693U Expired - Lifetime CN201455212U (en) | 2009-08-12 | 2009-08-12 | Copper tube for continuous casting of square billet, round billet and rectangular billet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201455212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298574A (en) * | 2011-06-27 | 2013-09-11 | Kme德国有限及两合公司 | Method for producing a mold tube |
-
2009
- 2009-08-12 CN CN2009201107693U patent/CN201455212U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103298574A (en) * | 2011-06-27 | 2013-09-11 | Kme德国有限及两合公司 | Method for producing a mold tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |
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| CX01 | Expiry of patent term |