CN105195692A - Chamfered crystallizer narrow-surface copper plate - Google Patents
Chamfered crystallizer narrow-surface copper plate Download PDFInfo
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- CN105195692A CN105195692A CN201510692410.1A CN201510692410A CN105195692A CN 105195692 A CN105195692 A CN 105195692A CN 201510692410 A CN201510692410 A CN 201510692410A CN 105195692 A CN105195692 A CN 105195692A
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Abstract
The invention discloses a chamfered crystallizer narrow-surface copper plate which comprises a main surface area and side surface chamfered areas, wherein one or more cooling water tanks which run through in an up-down manner are arranged on the main surface area, and a cooling mechanism is arranged at the back part of each side surface chamfered area. The cooling mechanisms are triangular structure holes consisting of a plurality of cooling holes, and the cooling holes adopt round structures. Under the action of the chamfers, steel billets can be better clung to the inner wall of a crystallizer in the molten steel solidification process, so that the casting blank quality can be ensured.
Description
Technical field
The present invention relates to metal freezing and continuous casting technical field, particularly a kind of chamber crystallizer narrow-surface copper.
Background technology
Along with the development of world's metallurgical technology, the constantly progress of modern continuous casting technology, steel grade of can casting constantly expands, and some high alloys, high-quality, high crack sensitivity steel grade are continuous is produced in the production procedure of large iron and steel enterprise continuous casting.One of this wherein main technological progress is the development of big cross section strand continuous casting technology.The development of big cross section strand continuous casting technology, the compression ratio of steel increases, and the product quality of steel improves.But the adverse effect that the increase of casting blank section brings is exactly: strand needs to bend, align in casting machine, can bring the increase of strand corner crack thus.Especially in recent years the slab thickness of Slab Caster has reached more than 250-450mm thickness, bloom and large rectangle base thickness reach more than 350-500mm especially, chamfer crystallizer copper coin with tapering disclosed in chamfer crystallizer copper coin and CN201110281520.0 disclosed in CN201410469991.8, because the inhomogeneous cooling in bight is even, the stress in bending, straightening process concentrates the increase that certainly will cause strand corner crack.In order to avoid cracking defect at the steel plate edge of follow-up rolling, the continuous casting steel billet to there is transverse corner crack line and longitudinal corner crack defect is often needed to carry out corner cut process, but this not only substantially increases production cost, but also reduce production efficiency, have a strong impact on iron and steel enterprise's logistics and change release delivery date.On the other hand, need the problem considering safety, difficulty of processing and cost, chamfered area arranges through bosh, difficulty is very large on the one hand, the quality of the Design and manufacture of bosh directly has influence on bight and produces transverse crack and longitudinal crack on the other hand, the little difficulty of processing of chamfered area area is well imagined, therefore irregular or special-shaped bosh (especially arc or irregular Cooling Holes) is processed processor especially and is inspired awe even from distance, and processing cost and safety are all the major reasons hindering crystallizer to promote to more rational structure on the other hand.Hinder the fast development of crystallizer, even hinder the formation of the thinking of person of ordinary skill in the field's divergence form.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of molten steel steel billet in the process of solidifying that is more conducive under chamfering effect to be close to the chamber crystallizer narrow-surface copper of crystallizer inwall all the time.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is as described below:
A kind of chamber crystallizer narrow-surface copper, comprise great Mian Qu and chamfered region, side, described great Mian district arranges the bosh of one or more up/down perforation, and the back of described side chamfering arranges cooling body.
Further, described cooling body is the triangular structure hole be made up of several Cooling Holes.
Further, described Cooling Holes is circular configuration.
Further, described cooling body is the triangular structure hole be made up of 3 circular holes.
Further, all sides, described triangular structure hole are provided with shoulder hole.
Further, the tangent line of two circular holes in right side is parallel with side chamfering working face.
Further, the diameter of described 3 circular holes is identical.
The processing method in described triangular structure hole, comprises the following steps:
1) use compasses to draw three tangent circles in chamfered area, and the tangent line of two circular holes in right side is parallel with side chamfering working face;
2) use drilling machine to hole to first of chamfered area circle, after first circular hole bores, filling round bar identical for diameter is inserted in first circular hole bored;
3) use drilling machine to hole to second of chamfered area circle, after second circular hole bores, filling round bar identical for diameter is inserted in second circular hole bored;
4) use drilling machine to hole to the 3rd of chamfered area the circle, after the 3rd circular hole bores, the filling round bar in first circular hole and second circular hole is all extracted; Rotate the contiguous block at three center of circular hole places, contiguous block is taken out; In triangular structure hole, all sides are provided with shoulder hole.
The sectional side elevation of described large area working face is polyline shaped.
Further, described polyline shaped is made up of the first broken line, vertical line.
Further, the angle between described first broken line and narrow copper plate side is 0.2 ~ 10 degree.
Further, the angle between described first broken line and narrow copper plate side is 6 ~ 10 degree.
Further, the length of described first broken line is 22 ~ 31% of crystallizer height.
Further, angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.
Further, angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.
Further, chamfered region, described side chamfer angle a is 30 ~ 70 degree.Further, the height H of described side chamfering a is 22% ~ 32% of this narrow copper plate overall width.
Further, the height H of described side chamfering a is 27% ~ 29% of this narrow copper plate overall width.
Further, chamfered region, described side chamfer angle a1 is 73 ~ 82 degree.
Further, chamfered region, described side chamfer angle a1 is 76 ~ 79 degree.Further, the height H of described side chamfering a1 is 27% ~ 29% of this narrow copper plate overall width.
Compared with prior art, beneficial effect of the present invention is: narrow copper plate of the present invention also comprises the straight water seam at middle part and the oblique water seam of both sides, oblique water seam is 50 ~ 80 ° with the angle of narrow face copper plate of crystallizer horizontal plane, and the distance of oblique water seam top and narrow copper plate hot side equals the distance of top that straight water stitches and copper coin hot side.Further, described polyline shaped is made up of the first broken line, vertical line, adopt primary oblique structure, simple, the easy processing of structure on the one hand, later stage are also easy to cleaning and safeguard, suitably add the tapering on crystallizer top on the other hand, the gap between casting blank shell and copper coin hot side can be avoided, ensure the close contact between casting blank shell and copper coin hot side, be conducive to the homoepitaxial of casting blank shell.Further, the angle b between described first broken line and narrow copper plate side is 6 ~ 10 degree, and the length of described first broken line is 22 ~ 31% of crystallizer height.The present inventor studies discovery by experiment, when the angle of the first broken line is 6 ~ 10 degree, and the length of broken line is when being 22 ~ 31% of crystallizer height, the hot side of copper plate of crystallizer is the shape closest to casting blank solidification shrinking law, and what is more important can ensure the good contact of base shell and copper coin hot side largely, at the equal cooling device of use and identical cooling tank structure, adopt above-mentioned meander line structure of the present invention and broken line length, cooling effectiveness is 1.25 times that do not adopt meander line structure and broken line length, slab quality is significantly improved, casting speed is 1.32 times that do not adopt such scheme, what is more important, when the length of broken line is 22 ~ 31% of crystallizer height, when having above-mentioned functions, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, improve the service life of copper coin, the service life of copper coin is 1.5 times that do not adopt such scheme.Further, angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side, and angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side, and chamfered region, described side chamfer angle a is 30 ~ 70 degree.Chamfering is less than 30 degree, and that bight can be caused to come to a point is elongated, and the cooling effect of oblique tank to chamfered area is bad, can produce larger stress simultaneously, reduce the service life of copper coin at wedge angle position; When α is greater than 70 °, chamfered area temperature rise can be caused not obvious.Further, chamfered region, described side chamfer angle a1 is 73 ~ 82 degree, chamfered region, described side chamfer angle a is 65 ~ 70 degree, and adopt broken line length of the present invention, allow people surprisingly when strand moves down in process, squeezing action is slightly played in the bottom of narrow boards, ensure the close contact between casting blank shell and copper coin hot side, the homoepitaxial of casting blank shell, forms base shell that is complete, all round closure.Further, the height H of described side chamfering is 22% ~ 32% of this narrow copper plate overall width.The chamfered area height H that currently available technology generally adopts is 2% ~ 20% of whole copper coin width, the present invention also can adopt chamfered area height H to be 2% ~ 20% of whole copper coin width, effect is better than prior art, but effect does not reach expection, those skilled in the art generally believe that H can cause chamfered area temperature rise too high higher than 20%, this region casting blank shell thinner thickness, the danger of newly-increased corner crack and bleed-out, and now owing to having produced air gap between chamfered area copper coin hot side and casting blank shell, but the present invention is by adjustment chamfering, broken line angle and broken line length, the temperature rise of chamfered area can not be accelerated, simultaneously can make casting blank shell bight Temperature Distribution evenly, bight there will not be crackle and bleed-out, further, the height H of described side chamfering is 27% ~ 29% of this narrow copper plate overall width, the height H of described side chamfering is 27% ~ 29% of this narrow copper plate overall width, when strand moves down in process, squeezing action is slightly played at the both ends of strand, ensures the close contact between casting blank shell and copper coin hot side, the homoepitaxial of casting blank shell, can form base shell that is complete, all round closure, the bight of casting blank shell there will not be crackle.Further, chamfered region, described side chamfer angle a1 is 76 ~ 79 degree, can play good squeezing action to molten steel, ensures to form base shell that is complete, all round closure.
The narrow copper plate of band side of the present invention chamfering, can ensure chamfering cooling effect, avoid strand corner crack, and can improve service life and the slab quality of narrow copper plate and side chamfering.The corner of the sheet billet of narrow copper plate cast is rectangular shaped, easily processing cost is low on the one hand, higher in conjunction with the temperature of broken line length of the present invention and angle strand corner on the other hand, higher and the cross direction profiles of the temperature of strand corner evenly, the stress bent and be subject in straightening process is less, effectively can suppress the generation of strand angle transverse fissure, improve the uniformity of conducting heat in the bight temperature of strand and coagulation forming process, and the stress that reduction is bending and straightening process sheet billet bight is subject to is concentrated, the cracks of steel side cape defect of final elimination microalloying steel grade, be conducive to the service life extending narrow copper plate simultaneously.Adopt polyline shaped structure to ensure the good contact of base shell and copper coin hot side, be conducive to improving casting speed.
Accompanying drawing explanation
Fig. 1 is chamber crystallizer narrow-surface copper vertical profile TV structure schematic diagram of the present invention;
Fig. 2 is the sectional structure schematic diagram in chamber crystallizer narrow-surface copper first broken line portion of the present invention;
Fig. 3 is the sectional structure schematic diagram in chamber crystallizer narrow-surface copper vertical line portion of the present invention;
Fig. 4 is the sectional structure schematic diagram in the chamber crystallizer narrow-surface copper vertical line portion of the embodiment of the present invention 6.
Detailed description of the invention
Embodiment 1: as shown in Figure 1, 2, 3, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, and the sectional side elevation of a described large area working face is polyline shaped.Described polyline shaped is made up of the first broken line, vertical line.Angle between described first broken line and narrow copper plate 1 side is 6 degree.The length of described first broken line is 22% of crystallizer height.Angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.Angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.Chamfered region, described side chamfer angle a is 30 degree.The height H of described side chamfering a is 22% of this narrow copper plate overall width.Chamfered region, described side chamfer angle a1 is 73 degree.The height H 1 of described side chamfering a1 is 22% of this narrow copper plate overall width.The technical scheme slab cooling efficiency adopting embodiment 1 is 1.22 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.30 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.4 times that do not adopt such scheme.
Embodiment 2: as shown in Figure 1, 2, 3, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, and the sectional side elevation of a described large area working face is polyline shaped.Described polyline shaped is by the first broken line, vertical line forms, angle between described first broken line and narrow copper plate 1 side is 10 degree, the length of described first broken line is 31% of crystallizer height, further, angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side, angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side, chamfered region, described side chamfer angle a is 70 degree, the height H of described side chamfering a is 32% of this narrow copper plate overall width, the height H 1 of described side chamfering a1 is 32% of this narrow copper plate overall width, chamfered region, described side chamfer angle a1 is 82 degree.The technical scheme slab cooling efficiency adopting embodiment 2 is 1.23 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.31 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.42 times that do not adopt such scheme.
Embodiment 3: as shown in Figure 1, 2, 3, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, and the sectional side elevation of a described large area working face is polyline shaped.Described polyline shaped is made up of the first broken line, vertical line.Angle between described first broken line and narrow copper plate 1 side is 7 degree.The length of described first broken line is 27% of crystallizer height.Angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.Angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.Chamfered region, described side chamfer angle a is 65 degree.The height H of described side chamfering a is 27% of this narrow copper plate overall width.Chamfered region, described side chamfer angle a1 is 73 degree.The height H 1 of described side chamfering a1 is 27% of this narrow copper plate overall width.The technical scheme slab cooling efficiency adopting embodiment 3 is 1.36 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.42 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.53 times that do not adopt such scheme.
Real-time example 4: as shown in Figure 1,2,3, 4, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, and the sectional side elevation of a described large area working face is polyline shaped.Described polyline shaped is made up of the first broken line, vertical line.Angle between described first broken line and narrow copper plate 1 side is 8 degree.The length of described first broken line is 26% of crystallizer height.Angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.Angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.Chamfered region, described side chamfer angle a is 68 degree.The height H of described side chamfering a is 28% of this narrow copper plate overall width.Chamfered region, described side chamfer angle a1 is 76 degree.The height H 1 of described side chamfering a1 is 28% of this narrow copper plate overall width.The technical scheme slab cooling efficiency adopting embodiment 4 is 1.39 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.48 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.52 times that do not adopt such scheme.
Embodiment 5: as shown in Figure 1, 2, 3, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, and the sectional side elevation of a described large area working face is polyline shaped.Described polyline shaped is made up of the first broken line, vertical line.Angle between described first broken line and narrow copper plate 1 side is 9 degree.The length of described first broken line is 29% of crystallizer height.Angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.Angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.Chamfered region, described side chamfer angle a is 70 degree.The height H of described side chamfering a is 29% of this narrow copper plate overall width.The height H 1 of described side chamfering a1 is 29% of this narrow copper plate overall width.Chamfered region, described side chamfer angle a1 is 75 degree.The technical scheme slab cooling efficiency adopting embodiment 5 is 1.41 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.54 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.6 times that do not adopt such scheme.
Embodiment 6: as shown in Figure 1,2,3, 4, a kind of chamber crystallizer narrow-surface copper, comprise great Mian district 3 and chamfered region, side 2, the back of described great Mian Qu and side chamfering arranges the bosh of one or more up/down perforation, a kind of chamber crystallizer narrow-surface copper, comprise great Mian Qu and chamfered region, side, described great Mian district arranges the bosh of one or more up/down perforation, and the back of described side chamfering arranges cooling body.Described cooling body is the triangular structure hole be made up of several Cooling Holes.Described Cooling Holes is circular configuration.Described cooling body is the triangular structure hole be made up of 3 circular holes.All sides, described triangular structure hole are provided with shoulder hole.Further, the tangent line of two circular holes in right side is parallel with side chamfering working face, and the diameter of described 3 circular holes is identical, mutually circumscribed between three circular holes, and three circular holes are interconnected, and the sectional side elevation of described large area working face is polyline shaped.Described polyline shaped is made up of the first broken line, vertical line.Angle between described first broken line and narrow copper plate 1 side is 9 degree.The length of described first broken line is 29% of crystallizer height.Angle a is the angle between the working face of chamfered region, vertical line side and narrow copper plate side.Angle a1 is the angle between the working face of the first chamfered region, broken line side and narrow copper plate side.Chamfered region, described side chamfer angle a is 70 degree.The height H of described side chamfering a is 28% of this narrow copper plate overall width.The height H 1 of described side chamfering a1 is 29% of this narrow copper plate overall width.Chamfered region, described side chamfer angle a1 is 75 degree.The technical scheme slab cooling efficiency adopting embodiment 6 is 1.59 times that do not adopt meander line structure and broken line length, and slab quality is significantly improved, and casting speed is 1.69 times that do not adopt such scheme; What is more important, suitable broken line length can also reduce the wearing and tearing between casting blank shell and copper coin hot side, and improve the service life of copper coin, the service life of copper coin is 1.75 times that do not adopt such scheme.Described cooling body is the triangular structure hole be made up of several Cooling Holes.Described Cooling Holes is circular configuration.Described cooling body is the triangular structure hole be made up of 3 circular holes.All sides, described triangular structure hole are provided with shoulder hole.The tangent line of two circular holes in right side is parallel with side chamfering working face.The diameter of described 3 circular holes is identical.The processing method in described triangular structure hole, comprises the following steps: 1) use compasses to draw three tangent circles in chamfered area, and the tangent line of two circular holes in right side is parallel with side chamfering working face; 2) use drilling machine to hole to first of chamfered area circle, after first circular hole bores, filling round bar identical for diameter is inserted in first circular hole bored; 3) use drilling machine to hole to second of chamfered area circle, after second circular hole bores, filling round bar identical for diameter is inserted in second circular hole bored; 4) use drilling machine to hole to the 3rd of chamfered area the circle, after the 3rd circular hole bores, the filling round bar in first circular hole and second circular hole is all extracted; Rotate the contiguous block at three center of circular hole places, contiguous block is taken out; In triangular structure hole, all sides are provided with shoulder hole.Process simple cost low, compared with prior art, punching cost reduces by 40%, although perforated area than is originally beaten, but perforating efficiency is original 1.3 times, and success rate 99.9% of punching, large in chamfered area perforated area, good heat dissipation effect, the heat radiation of what is more important copper coin angle place is more even.
Claims (10)
1. a chamber crystallizer narrow-surface copper, comprise great Mian Qu and chamfered region, side, it is characterized in that: described great Mian district arranges the bosh of one or more up/down perforation, the back of described side chamfering arranges cooling body, and described cooling body is the triangular structure hole be made up of several Cooling Holes.
2. chamber crystallizer narrow-surface copper as claimed in claim 1, is characterized in that: described Cooling Holes is circular configuration.
3. chamber crystallizer narrow-surface copper as claimed in claim 2, is characterized in that: described cooling body is the triangular structure hole be made up of 3 circular holes.
4. chamber crystallizer narrow-surface copper as claimed in claim 3, is characterized in that: all sides, described triangular structure hole are provided with shoulder hole.
5. chamber crystallizer narrow-surface copper as claimed in claim 4, is characterized in that: the tangent line of two circular holes in right side is parallel with side chamfering working face.
6. chamber crystallizer narrow-surface copper as claimed in claim 5, is characterized in that: the diameter of 3 circular holes is identical.
7. the processing method in triangular structure hole as claimed in claim 3, is characterized in that: comprise the following steps:
1) use compasses to draw three tangent circles in chamfered area, and the tangent line of two circular holes in right side is parallel with side chamfering working face;
2) use drilling machine to hole to first of chamfered area circle, after first circular hole bores, filling round bar identical for diameter is inserted in first circular hole bored;
3) use drilling machine to hole to second of chamfered area circle, after second circular hole bores, filling round bar identical for diameter is inserted in second circular hole bored;
4) use drilling machine to hole to the 3rd of chamfered area the circle, after the 3rd circular hole bores, the filling round bar in first circular hole and second circular hole is all extracted; Rotate the contiguous block at three center of circular hole places, contiguous block is taken out; In triangular structure hole, all sides are provided with shoulder hole.
8. chamber crystallizer narrow-surface copper as claimed in claim 1, is characterized in that: the sectional side elevation of described large area working face is polyline shaped.
9. chamber crystallizer narrow-surface copper as claimed in claim 8, is characterized in that: described polyline shaped is made up of the first broken line, vertical line.
10. chamber crystallizer narrow-surface copper as claimed in claim 1, is characterized in that: chamfered region, described side chamfer angle a is 30 ~ 70 degree.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405163A (en) * | 2019-09-03 | 2019-11-05 | 山东钢铁股份有限公司 | A kind of device and method for eliminating big width steel plate stocking edge black line defect |
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| CN202146982U (en) * | 2011-05-03 | 2012-02-22 | 钢铁研究总院 | Chamber crystallizer narrow-surface copper plate with a combined cooling water channel |
| CN102642000A (en) * | 2012-05-08 | 2012-08-22 | 首钢总公司 | Slab continuous casting chamfer crystallizer narrow-face copper plate capable of effectively controlling longitudinal cracks of corners |
| CN102728795A (en) * | 2012-06-15 | 2012-10-17 | 首钢总公司 | Combined plate blank continuous casting chamfering crystallizer narrow-surface copper plate |
| CN104209484A (en) * | 2014-09-15 | 2014-12-17 | 首钢总公司 | Narrow-face copper plate for chamfer crystallizer |
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- 2015-10-23 CN CN201510692410.1A patent/CN105195692A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH01170550A (en) * | 1987-12-24 | 1989-07-05 | Nkk Corp | Mold for continuously casting steel |
| CN201871696U (en) * | 2010-10-27 | 2011-06-22 | 钢铁研究总院 | Narrow face copper plate of crystallizer with curved structure |
| CN202146982U (en) * | 2011-05-03 | 2012-02-22 | 钢铁研究总院 | Chamber crystallizer narrow-surface copper plate with a combined cooling water channel |
| CN102642000A (en) * | 2012-05-08 | 2012-08-22 | 首钢总公司 | Slab continuous casting chamfer crystallizer narrow-face copper plate capable of effectively controlling longitudinal cracks of corners |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110405163A (en) * | 2019-09-03 | 2019-11-05 | 山东钢铁股份有限公司 | A kind of device and method for eliminating big width steel plate stocking edge black line defect |
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Application publication date: 20151230 |