CN1056106C - Mould for continuous casting thin sheet bloom - Google Patents
Mould for continuous casting thin sheet bloom Download PDFInfo
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- CN1056106C CN1056106C CN95106714A CN95106714A CN1056106C CN 1056106 C CN1056106 C CN 1056106C CN 95106714 A CN95106714 A CN 95106714A CN 95106714 A CN95106714 A CN 95106714A CN 1056106 C CN1056106 C CN 1056106C
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- wide
- camber line
- leptoprosopy
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- crystallizer
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Abstract
The present invention relates to a crystallizer for continuously casting metal, which is mainly suitable for continuously casting a metal thin sheet bloom. The crystallizer is composed of a wide water-cooling copper plate and a narrow water-cooling copper plate which are mutually opposite, wherein the upper part of the wide water-cooling copper plate is provided with the inclined smooth curved surface, and the lower part is provided with the vertical plane. The upper part of the crystallizer is provided with a funnel-shaped casting area, and the lower part is provided with a shape cavity area. The wide level cross-section curve is composed of three sections of inner concave and outer convex arc lines which are mutually tangential. A meeting point of the wide arc line and the narrow straight line is a transient tangential point of the wide arc line towards the straight line. The wide face and the narrow face are perpendicular at the point. The proportion of the total length of three sections of arc lines and the straight line length of a head point and a tail point is 1.05 to 1.10.
Description
The present invention relates to the crystallizer that continuous casting of metal is used.Mainly be applicable to the continuous casting of sheet-metal blank.
In traditional sheet billet continuous casting, each cross section of crystallizer is rectangle, and in order to offset the contraction of solidifying in the temperature-fall period to be caused, each square-section diminishes from top to bottom gradually, and linear shrinkage ratio is about 0.8%.At present, comparatively Xian Jin funnel-type crystallizer be the conventional panels blank continuous casting crystallizer from bottom to top cross section be converted into vertically wide outside expansion by short elongated process by rational curved surface, insertion for submersed nozzle provides the space on the one hand, creates conditions for the heat transfer of solidified shell, growth and distortion rationally on the other hand.
Chinese patent ZL85101082 provides a kind of method and mold of continuous casting steel strip.Described crystallizer is a funnel-type crystallizer, has the wide wall and the narrow sidewall that are cooled, and wherein the top of wide wall and narrow sidewall constitute a funnel shaped casting gate area.The wide wall of this gate area dwindles gradually in size when narrow sidewall extends, up to the strand consistent size, the wide wall of casting gate area side extends in parallel narrow sidewall with the spacing corresponding to thickness of strips, thereby each several part forms parallel zone beyond the casting gate area.But still there is following shortcoming in the described crystallizer of this patent:
(1), since the wide wall of casting gate area side to extend in parallel narrow sidewall corresponding to thickness of strips, when the thin strand of casting (as 40～60mm) time, be subjected to bidimensional (wide and leptoprosopy) cooling at molten metal near narrow sidewall areas, its casting blank shell growth is very fast, and in the sprue cup district, owing to have only the one dimension cooling, cooling is slow, the base shell is thinner relatively, therefore causes base shell self unbalance stress, easily produces bigger stress and concentrates.
(2), there is a transition point in the wide wall curved portion on casting gate area cross section to the straight line portion transition time.At transition point, because curved portion is shunk, solidified shell is produced an inside tension, and the straight line portion outside the casting gate area, owing to be subjected to the effect of metal liquid static pressure, make solidified shell close to narrow sidewall, therefore, at transition point, because the contraction of straight line portion, solidified shell is produced an outside tension, concentrate, the base shell is cracked so produce stress at transition point.
(3), owing to cast the transition point of gate area curved portion to the straight line portion transition, be close to the center gradually from top to bottom, therefore, near the base shell transition point inboard on the cross section is constantly aligned in the horizontal direction, thereby has aggravated the stressed of transition point base shell.
The object of the present invention is to provide a kind of solidified shell shrink evenly, can eliminate stress concentrated, and the good mould for continuous casting thin sheet bloom of cc billet surface quality.
At above-mentioned purpose, the present invention has adopted following technical scheme:
Mould for continuous casting thin sheet bloom of the present invention is made up of two wide water-cooled copper plates respect to one another and leptoprosopy water-cooled copper plate; Two wide water-cooled copper plates divide upper and lower two parts: the bottom is divided into and is parallel to each other and vertical plane separated by a distance, top be divided into be open upwards, the outside inclined plane of broadening; Two leptoprosopy water-cooled copper plates are the plane that is disposed opposite to each other, and two wide top is divided into from the upper and lower part intersection outside smooth surface of broadening gradually from bottom to top; Form crystallizer upper funnel shape casting area and shape alveolus, bottom thus, the whole wide face of crystallizer casting area is smooth curved surface; On all level cross-sectionns of infundibulate casting area, each cross section camber line of wide is made up of three sections camber lines tangent to each other, comprising indent camber line and evagination camber line, crosses for the garden slips between three sections camber lines, and camber line is symmetry with the center line; Maximum is outwards protruded at the center of wide camber line, wide cross section camber line inwardly shrinking in leptoprosopy extension process gradually, the wide just camber line of joint of wide camber line and leptoprosopy straight line is by the point of contact of curve to straight transitions, and at joint, wide orthogonal with leptoprosopy.
The ratio of the straight length of the total length of above-mentioned three sections camber lines and two end points of total camber line is between 1.05～1.10.Spacing suitable for reading is 1.0～1.10 with the ratio of end opening spacing between two leptoprosopy.The allowable angle of inclination of the inclination curved surface of wide the outside broadening of upper part is less than 20 °.
In addition, the radius of curvature of each point increases from top to bottom gradually in three sections camber lines, i.e. increase with thickness of solidified slab shell in secondary increases, and makes the dependent variable of solidified shell in crystallizer less than 0.2～0.3.Wide camber line total length of each of infundibulate casting area level cross-sectionn reduces from top to bottom gradually, is consistent with the solidification shrinkage of base shell.In addition, the intersection of two wide top smooth surface and lower part vertical plane is that the garden slips over and crosses.
Compared with prior art, the present invention has following advantage:
1, the infundibulate casting area has adopted transition gradually to be the mode perpendicular to leptoprosopy in the wide face portion near leptoprosopy, guarantees the uniformity that the bight solidified shell is upper and lower on the one hand, avoid because the bight is out of shape the excessive resistance of billet withdrawal that causes, even the base shell is torn phenomenon; Guarantee the uniformity of solidified shell cooling on the other hand again, make the base shell obtain growing more equably.
2, because casting area whole wide face in crystallizer top is smooth curved surface, therefore avoided the base shell in motion deformation and contraction process, to produce local stress concentration.
3, each wide the camber line total length owing to wide level cross-sectionn of casting area reduces from top to bottom gradually, the radius of curvature of each point increases from top to bottom gradually in the camber line, and consistent with the solidification shrinkage rule of base shell, make the deformation drag of solidified shell littler.
Now the invention will be further described in conjunction with the accompanying drawings.
Accompanying drawing 1 is the level cross-sectionn sectional structure schematic diagram of mould for continuous casting thin sheet bloom of the present invention.
Accompanying drawing 2 is the vertical sectional structure schematic diagram of y axle of mould for continuous casting thin sheet bloom of the present invention.
Accompanying drawing 3 is the introversion line chart of crystallizer infundibulate casting area of the present invention level cross-sectionn cavity.
In the above-mentioned accompanying drawing, 1,2 is the leptoprosopy water-cooled copper plate, 3,4 is wide water-cooled copper plate, 5 is the infundibulate casting area, 6 is submersed nozzle, 7 is the shape alveolus, and 8 is the point of interface of wide upper and lower part, and 10,11,12 is wide three sections camber lines of infundibulate casting area level cross-sectionn cavity inner curve, A, D are the end of camber line, B, C are the interface point of camber line, and wherein AB, CD are the indent camber line, and BC is the evagination camber line, and three sections camber lines are tangent to each other, the AB camber line is in B point and BC tangential, and the BC camber line is in C point and CD tangential, and three sections camber lines are symmetry with the y axis.The ratio of the total length of AB, BC, three sections camber lines of CD and A, 2 straight lengths of D is between 1.05～1.10.The total length of AB, BC, three sections camber lines of CD reduces on different cross sections from top to bottom gradually.The α angle is wide inclination angle.A, D point is respectively camber line AB and the camber line CD point of contact to straight transitions.At point of contact A, D, wide vertical with leptoprosopy.Spacing suitable for reading is 1.0～1.10 with the ratio of end opening spacing between other two leptoprosopy water-cooled copper plates (1,2).The cross sectional dimensions in shape alveolus 7 is consistent with the strand cross sectional dimensions.
During enforcement, at first press the shape and size designing requirement of crystallizer of the present invention, respectively two wide water-cooled copper plates and two leptoprosopy water-cooled copper plates are processed, afterwards, by wide status requirement with leptoprosopy, method with machinery is assembled together two wide water-cooled copper plates and two leptoprosopy water-cooled copper plates, promptly becomes crystallizer of the present invention.
Claims (3)
1, a kind of mould for continuous casting thin sheet bloom is made up of two wide water-cooled copper plates respect to one another (3,4) and leptoprosopy water-cooled copper plate (1,2); Two wide water-cooled copper plates divide upper and lower two parts: the bottom is divided into and is parallel to each other and vertical plane separated by a distance, top be divided into be open upwards, the outside inclined plane of broadening; Two leptoprosopy water-cooled copper plates are the plane that is disposed opposite to each other, and the top of two wide (3,4) is divided into from the upper and lower part intersection outside smooth surface of broadening gradually from bottom to top; Form crystallizer upper funnel shape casting area (5) and shape alveolus, bottom (7) thus, it is characterized in that:
The whole wide face of crystallizer casting area is smooth curved surface; On all level cross-sectionns of infundibulate casting area (5), each cross section camber line of wide is made up of AB tangent to each other (10), BC (11), (12) three sections camber lines of CD, wherein AB (10) camber line and CD (12) camber line are the indent camber line, BC (11) camber line is the evagination camber line, and camber line is symmetry with the center line;
Maximum is outwards protruded at the center of wide camber line, wide cross section camber line inwardly shrinking in leptoprosopy extension process gradually, the joint A point of wide camber line and leptoprosopy straight line and the wide just camber line of D point are by the point of contact of curve to straight transitions, and at joint, wide orthogonal with leptoprosopy.
2, crystallizer according to claim 1 is characterized in that the ratio of the total length of AB (10), BC (11) and (12) three sections camber lines of CD and A, 2 straight lengths of D is between 1.05～1.10.
3, crystallizer according to claim 1 is characterized in that the ratio of spacing suitable for reading and end opening spacing is 1.0～1.10 between two leptoprosopy (1,2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106714A CN1056106C (en) | 1995-06-19 | 1995-06-19 | Mould for continuous casting thin sheet bloom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95106714A CN1056106C (en) | 1995-06-19 | 1995-06-19 | Mould for continuous casting thin sheet bloom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1121851A CN1121851A (en) | 1996-05-08 |
| CN1056106C true CN1056106C (en) | 2000-09-06 |
Family
ID=5075982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95106714A Expired - Fee Related CN1056106C (en) | 1995-06-19 | 1995-06-19 | Mould for continuous casting thin sheet bloom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056106C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292858C (en) * | 2004-01-17 | 2007-01-03 | 宝山钢铁股份有限公司 | Water-cooled metal continuous-casting crystallizer |
| ITMI20051765A1 (en) * | 2005-09-22 | 2007-03-23 | Danieli Off Mecc | BRANCH CASTING ITEM |
| US7493936B2 (en) * | 2005-11-30 | 2009-02-24 | Kobe Steel, Ltd. | Continuous casting method |
| CN101920317A (en) * | 2010-08-09 | 2010-12-22 | 河北文丰钢铁有限公司 | Rectangular casting blank crystallizer |
| CN102274934B (en) * | 2011-08-15 | 2013-04-24 | 钢铁研究总院 | Narrow copper plate with funnel-shaped curved surface and chamfered crystallizer |
| ITUD20120194A1 (en) * | 2012-11-16 | 2014-05-17 | Danieli Off Mecc | METHOD FOR THE REALIZATION OF A PLASTIC CRYSTALLIZER FOR CONTINUOUS BRAMME CASTING, AND CRYSTALLIZER SO IT HAS OBTAINED |
| CN108405818B (en) * | 2018-04-13 | 2020-01-14 | 东北大学 | Device and process for improving corner structure plasticity of microalloyed steel sheet billet |
| CN111730033B (en) * | 2020-07-08 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Crystallizer cavity structure |
| CN111745136B (en) * | 2020-07-08 | 2022-06-10 | 中冶赛迪工程技术股份有限公司 | Crystallizer |
| CN112743052A (en) * | 2020-12-29 | 2021-05-04 | 马鞍山钢铁股份有限公司 | Slab crystallizer for solving casting blank narrow surface cracks and control method |
| CN115815545B (en) * | 2022-10-27 | 2024-09-06 | 东北大学 | Narrow-surface copper plate of convex cambered surface continuous casting crystallizer and use method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072118A (en) * | 1991-11-05 | 1993-05-19 | 冶金工业部钢铁研究总院 | Crystallizer for continuous casting of thin slabs |
-
1995
- 1995-06-19 CN CN95106714A patent/CN1056106C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072118A (en) * | 1991-11-05 | 1993-05-19 | 冶金工业部钢铁研究总院 | Crystallizer for continuous casting of thin slabs |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1121851A (en) | 1996-05-08 |
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