CN1803334A - Double roller continuous casting magnesium alloy thin strip casting device - Google Patents
Double roller continuous casting magnesium alloy thin strip casting device Download PDFInfo
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- CN1803334A CN1803334A CN 200510057419 CN200510057419A CN1803334A CN 1803334 A CN1803334 A CN 1803334A CN 200510057419 CN200510057419 CN 200510057419 CN 200510057419 A CN200510057419 A CN 200510057419A CN 1803334 A CN1803334 A CN 1803334A
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- magnesium alloy
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- baffle plate
- thin strip
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Abstract
The invention discloses a two-roll continuous-casting magnesium alloy band casting device, which is characterized by the following: two end faces of forging roll connects the side closing board through support structure; the baffle is placed on the rectangle groove with all-around sealing of forging roll surface and side closing board; the rectangle groove is reinforced by fastening device; the bottom of baffle connects the forging roll directly, whose touch face displays arc face; the working face of baffle faces roll gap of two forging rolls; the function board is connected on the back of baffle working face, which connects the forging roll stickly. The invention can improve the liquid height greatly, which is easy to realize submersible casting to improve the casting band mould quality.
Description
Technical field
The invention belongs to field of metal casting technology, particularly a kind of bath surface is stable, the weld pool surface diaphragm not with the double roller continuous casting magnesium alloy thin strip casting device that the casting roller contacts, casting strip quality is good of rotation.
Background technology
Magnesium alloy density is little, specific strength is high, heat-conductivity conducting is good; Have good damping shock absorption and capability of electromagnetic shielding simultaneously, can be used for electronic installation,, can replace plastics satisfying light, thin, the miniaturization of product as the shell structure part of mobile communication, laptop computer etc., requirements such as high integration, market prospects are good.But because the crystal structure characteristic of magnesium alloy hexagonal crystal system makes its manufacturing procedure long, lumber recovery is low, and its lumber recovery of traditional handicraft of producing magnesium alloy plate is no more than 40%.
Adopting double roller therapy technology directly to obtain to approach final board dimension from alloy liquid, is the target of people's pursuit for many years.The nearly end form moulding of strip base can be shortened the production procedure of sheet material processing greatly, reduces production costs.Its production process is: in twin-roll thin strip casting process, continuously motlten metal is injected the formation molten bath, zone that two rollers surface and roller end side seal board are surrounded.Molten metal is after roller contact with casting, and the casting roller makes metal liquid be cooled to setting temperature earlier, produces subsequently coldly to begin to solidify in the surperficial the first half of roller.Along with the rotation of casting roller, two roll surface solidification layer are long gradually thick, and and the casting roller move down together, near two roller minimum clearances, finish and all solidify and form strip.
Double roller therapy technology can be divided into horizontal and vertical two kinds.It is ripe that horizontal double roller therapy is produced aluminum alloy plate materials, existing at home and abroad a large amount of application, though the control easily of this technology, technological process is simple, has following shortcoming: 1. the contact zone weak point makes the formation of solidified shell need long cool time; 2. the cooling effect of up-down rollers is inconsistent, and the configuration of surface of condensing zone upper and lower surface liquid film is inconsistent, causes Cast Strip upper and lower surface quality and interior tissue inhomogeneous.Therefore, there is production efficiency low, the shortcoming that the cooling velocity of magnesium alloy thin strip blank is slower.Vertical double roller therapy teeming speed is very fast, can improve an order of magnitude with respect to horizontal technology, and it is bigger to solidify cooling rate, and structural homogenity is better, and it is littler to water strip thickness, has bigger development potentiality.
Cloth stream technology when one of key technology of vertical double roller therapy continuous casting of thin strip is cast, promptly how alloy liquid is introduced the molten bath that is made of two casting rollers and side seal board, and keeping the stability of bath surface and the uniformity in flow field, molten bath and temperature field, it is directly connected to the stability of metal bath in the casting process molten bath and the quality of Cast Strip base.Yet for magnesium alloy, because its chemical property is active, very easily oxidation, even burning must adopt specialized apparatus or measure to prevent the oxidation of magnesium alloy fused mass.
Fig. 1 is conventional double roller continuous casting schematic diagram.Smelt alloy solution well and pass through tundish 7 and cast gate 11, will form molten bath 8 between two castings of alloy liquid injection rollers 1, process is cast the continuously cooling and freezing of roller and is formed strip.Yet can produce following technological problems when adopting this device cast magnesium alloy: 1. the problem of oxidation of liquid magnesium alloy.As previously mentioned, magnesium alloy chemical character is active, very easily oxidation and burning, after the magnesium alloy liquation is cast into the molten bath from cast gate, this moment, the temperature of magnesium alloy was also very high, was bound to that oxidation takes place even burnt (660 ℃ of the fusing points of magnesium are in burning easily more than 450 ℃) as if directly contacting with air.Must take the corresponding protection measure.The guard method of magnesium alloy solution commonly used mainly contains: coverture protection and gas shield form protection gas (agent) cover layer 9, promptly form layer protecting film at weld pool surface, and the liquid magnesium alloy that suppresses under the diaphragm continues oxidation.But adopt the structure of conventional double roller continuous casting, the weld pool surface diaphragm is directly contacted with the crystallization roller of rotation.Referring to Fig. 4 (a), along with the rotation of casting roller, the weld pool surface diaphragm is brought solidification zone easily into and is formed slag inclusion, influences casting strip quality; 2. adopt method when cast of conventional double roller continuous casting, high to the stability requirement of bath surface, the initial solidification of metal Cast Strip when the minor fluctuations of bath surface can influence continuous casting, and influence the quality of Cast Strip.
Summary of the invention
The purpose of this invention is to provide a kind of double roller continuous casting magnesium alloy thin strip casting device.It can increase substantially the bath surface height, is easy to realize submersible cast, and melt is to the impact in molten bath when weakening casting in the double roller continuous casting technology greatly; bath surface is stable; pouring technology is stable, and the weld pool surface diaphragm is not contacted with the casting roller of rotation, improves Cast Strip base quality.
Technical scheme of the present invention is achieved in that
The both ends of the surface of two casting rollers arranged side by side connect side seal board by supporting construction respectively, and the rectangular channel of sealing was as the molten bath around baffle plate and side seal board bonding formed.The molten bath reinforces with fastener, and its fastener is that two bolts are passed the two ends of clamping plate in the rectangular channel outside respectively is fastening with nut.The baffle plate lower end directly closely contacts with the casting roller, and its contact-making surface is a cambered surface.
To being placed on casting roller surface, the top of baffle plate and side seal board is higher than the top that casts roller to baffle plate along the casting roll shaft, and the height of side seal board is greater than the radius of casting roller, and the working face of baffle plate is smooth or has lines.
The working face of baffle plate is towards the roll gap between two casting rollers, and the back side of baffle plate working face is connected with feature board, and the bottom surface of feature board closely cooperates with the casting roller.When casting cycle just often, the main lubricate of this feature board.Unusual when the casting cycle appearance, when causing the slit of liquid magnesium alloy between baffle plate and casting roller to be oozed out, feature board can make liquid magnesium alloy solidify rapidly, thereby prevents further oozing out of liquid magnesium alloy.Feature board adopts with the liquid magnesium alloy reaction, has certain lubrication, material that the capacity of heat transmission is strong, simultaneously, also can play the effect of lubricated casting roller.Feature board adopts graphite or boron nitride material.
Good effect of the present invention:
1. melt pool height was brought up on the casting roller top when apparatus of the present invention will be poured into a mould; improved the bath surface of metal bath when casting; avoid the bath surface diaphragm directly to contact (referring to Fig. 4 (b)) with the casting roller of rotation; weakened in the casting cycle melt-flow thigh greatly to the impact in molten bath; also avoid melt to impact the pool level fluctuation that the molten bath causes and the formation of slag inclusion simultaneously, helped the initial solidification of metal Cast Strip.
2. melt pool height will produce certain fluid pressure to initial solidification point and solidification front, weaken harmful disturbance of solidification front place melt, help the stable of solidification front.
3. apparatus of the present invention have been broken the relevance between the bath surface and initial solidification point in traditional double roller continuous casting, have guaranteed the stability of initial solidification point position and solidification front effectively, improve Cast Strip base quality.
4. improve the bath surface height, can adopt the submersible casting,, control the uniformity in molten bath flow field and temperature field by the degree of depth that slips at the control submersible casting mouth of a river.
Below in conjunction with embodiment beneficial effect of the present invention is described further.
Description of drawings
Fig. 1 is conventional magnesium alloy double roller continuous casting process schematic diagram;
Fig. 2 is a structure diagram of the present invention;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 a is conventional magnesium alloy double roller continuous casting weld pool surface diaphragm schematic diagram;
Fig. 4 b is a structure magnesium alloy double roller continuous casting weld pool surface diaphragm schematic diagram of the present invention;
Fig. 5 a is conventional AZ31B magnesium alloy ingot metallographic structure figure;
Fig. 5 b is for adopting the metallographic structure figure of apparatus of the present invention with the AZ31B magnesium alloy thin strip of vertical double roller continuous casting technology preparation.
1 is the casting roller among the figure, and 2 is side seal board, and 3 is baffle plate, and 4 is feature board, and 5 is fastener; 6 is alloy liquid; 7 is tundish; 8 is the molten bath; 9 are protection gas (agent) cover layer; 10 is the Cast Strip; 11 is cast gate.
The specific embodiment
Referring to Fig. 2 and Fig. 3.Adopt common side seal board structure.By the end face of casting roller, the working face of side seal board is relative and parallel with casting roller end face by support construction supports for side seal board 2, and the working face of side seal board closely contacts with the end face of casting roller; The working face of side seal board is provided with lines.Baffle plate 3 axially is placed on casting roller surface along casting roller 1, and baffle plate directly contacts with the casting roller, and its contact-making surface is a cambered surface.The rectangular channel of sealing was as the molten bath around baffle plate 3 formed with side seal board 2 bondings.The molten bath reinforces with fastener 5, and its fastening degree can be regulated by the Luo bar, and the baffle plate top is consistent with side seal board top height.Baffle plate is a cambered surface with end grinding before installation that the casting roller contacts, and the radius of curvature of this cambered surface is identical with the radius of casting roller, makes it better to closely cooperate with casting roller surface.
The molten bath is higher than the top that casts roller, and the height of side seal board is greater than the radius of casting roller.The refractory material that the material of baffle plate and side seal board is selected is chemically stable to magnesium alloy fused mass, have certain heat-insulating property, the casting roller is had good lubrication.The cement asbestos board that the present invention adopts the asbestos product factory, Chongqing to produce.
The working face of baffle plate is towards the roll gap between two casting rollers, and the back side of baffle plate working face is connected with feature board 4, and the bottom surface of feature board closely cooperates with the casting roller.Feature board adopts with the liquid magnesium alloy reaction, has certain lubrication, material that the capacity of heat transmission is strong, simultaneously, also can play the effect of lubricated casting roller.Feature board of the present invention adopts graphite or boron nitride.
Before cast,,, prevent that alloy liquid 6 from solidifying at baffle plate and side seal board to improve the temperature of baffle plate and side seal board with side seal board and baffle area heating.The heater and the method for the side seal system that this heater and continuous casting process are common are identical, can adopt resistance heated, eddy-current heating, flame heat etc., and heating-up temperature keeps identical substantially with the temperature of the alloy liquid of cast.
According to the freezing range of different magnesium alloy fused mass, the distance between the width of adjustable side shrouding, two baffle plates, the solidification zone size that the control liquid magnesium alloy contacts with the casting roller.As: when the freezing range of magnesium alloy fused mass during, the distance of two baffle plates is increased to 0.6～0.8 times of casting roller radius 60～130 ℃ of scopes; When the freezing range of magnesium alloy fused mass during, the distance of two baffle plates can be reduced to 0.4～0.6 times of casting roller radius 20～60 ℃ of scopes.
The working face of baffle plate is smooth or has lines, the fluctuation that produces in the time of can reducing bath surface because of the adding melt when having lines.
When adopting apparatus of the present invention cast magnesium alloy liquid, respond well with the submersible casting.In order to prevent the melt liquid level oxidizing fire, the protection of melt can adopt gas as using CO in the casting cycle
2+ SF
6Or argon shield, or adopt the coverture protection.Because cast gate 11 is lower than bath surface; therefore bath surface is stable, uniformity of temperature profile in the molten bath, and bath surface protective layer 9 does not contact (referring to Fig. 4 (b)) with the casting roller of rotation in the whole casting process; the melt-flow thigh is little to the impact in molten bath, and pool level fluctuation is little.The seepage of liquid magnesium alloy does not take place in 10 examples by experiment.Casting cycle is smooth, can obtain being shaped, organizing the magnesium alloy Cast Strip 10 that crystal grain is tiny, surface quality is good.
Referring to Fig. 5.Comparison diagram 5a and Fig. 5 b can see that to adopt apparatus of the present invention tiny with organizing of the AZ31B magnesium alloy thin strip of vertical double roller continuous casting technology casting system, grain size be about the ingot casting that conventional method prepares grain size 22%.
Claims (6)
1. magnesium alloy thin strip continuous casting pouring device, the both ends of the surface of two casting rollers arranged side by side connect side seal board by supporting construction respectively, it is characterized in that: baffle plate is higher than the rectangular channel of casting the roller top along the casting roll shaft to being placed on casting roller surface and being fixedly connected to form the top of sealing all around with side seal board, this rectangular channel is reinforced with fastener, the baffle plate lower end directly contacts with the casting roller, and its contact-making surface is a cambered surface; The working face of baffle plate is towards the roll gap between two casting rollers, and the back side of baffle plate working face is connected with feature board, and the bottom surface of feature board closely cooperates with the casting roller.
2. magnesium alloy thin strip continuous casting pouring device according to claim 1 is characterized in that: baffle plate is identical with casting roller radius with the cambered surface radius of curvature of casting roller contact.
3. magnesium alloy thin strip continuous casting pouring device according to claim 1 is characterized in that: the height of side seal board is greater than the radius of casting roller.
4. magnesium alloy thin strip continuous casting pouring device according to claim 1 is characterized in that: baffle plate and side seal board are bonding connection.
5. magnesium alloy thin strip continuous casting pouring device according to claim 1 is characterized in that: feature board adopts graphite or boron nitride material.
6. magnesium alloy thin strip continuous casting pouring device according to claim 1 is characterized in that: the working face of baffle plate is smooth or has lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100574191A CN100368120C (en) | 2005-12-02 | 2005-12-02 | Double roller continuous casting magnesium alloy thin strip casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100574191A CN100368120C (en) | 2005-12-02 | 2005-12-02 | Double roller continuous casting magnesium alloy thin strip casting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1803334A true CN1803334A (en) | 2006-07-19 |
| CN100368120C CN100368120C (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100574191A Expired - Fee Related CN100368120C (en) | 2005-12-02 | 2005-12-02 | Double roller continuous casting magnesium alloy thin strip casting device |
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| CN (1) | CN100368120C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226701B (en) * | 2007-12-28 | 2010-11-10 | 东北大学 | Dual-roller thin-belt casting rolling analog equipment as well as usage and control method thereof |
| CN102029364A (en) * | 2010-12-30 | 2011-04-27 | 一重集团大连设计研究院有限公司 | Partition plate device of casting system of double-roller continuous casting machine |
| CN103878348A (en) * | 2014-03-24 | 2014-06-25 | 中国重型机械研究院股份公司 | Magnesium alloy sheet belt continuous production device and technology |
| CN104923793A (en) * | 2015-06-16 | 2015-09-23 | 昆明理工大学 | Continuous rolling extrusion device |
| CN108941488A (en) * | 2018-07-25 | 2018-12-07 | 芜湖凌梦电子商务有限公司 | A kind of edge guard of double-roll type thin plate casting machine |
| CN110170626A (en) * | 2019-06-20 | 2019-08-27 | 中冶赛迪工程技术股份有限公司 | A kind of casting pre-cooling casting device |
| CN112238212A (en) * | 2020-10-29 | 2021-01-19 | 燕山大学 | Double-roller thin-strip casting-rolling electromagnetic extrusion type metal molten pool side sealing method and side sealing device thereof |
| CN113857447A (en) * | 2021-09-28 | 2021-12-31 | 山东理工大学 | Device and method for simulating key transmission mechanism of double-roller casting-rolling molten pool |
| CN114269492A (en) * | 2019-07-03 | 2022-04-01 | 斯佩拉有限公司 | Melt supply for a strip casting installation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3071294B2 (en) * | 1992-03-24 | 2000-07-31 | 日新製鋼株式会社 | Thin plate continuous casting equipment |
| AUPN426195A0 (en) * | 1995-07-19 | 1995-08-10 | Bhp Steel (Jla) Pty Limited | Twin roll continuous caster |
| FR2765504B1 (en) * | 1997-07-04 | 1999-08-20 | Usinor | SIDE SIDE FOR SEALING THE CASTING SPACE OF A CONTINUOUS CASTING INSTALLATION BETWEEN METAL THIN STRIP CYLINDERS |
| CH691574A5 (en) * | 1999-09-24 | 2001-08-31 | Main Man Inspiration Ag | The strip casting machine for producing a metal strip. |
| DE10134076C2 (en) * | 2001-07-13 | 2003-06-18 | Thyssenkrupp Nirosta Gmbh | Device for the continuous casting of metal melts, in particular steel melts |
| CH696138A5 (en) * | 2002-10-04 | 2007-01-15 | Main Man Inspiration Ag | Sealing plate to the side sealing of a casting gap formed between two casting rolls of a strip-casting machine. |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226701B (en) * | 2007-12-28 | 2010-11-10 | 东北大学 | Dual-roller thin-belt casting rolling analog equipment as well as usage and control method thereof |
| CN102029364A (en) * | 2010-12-30 | 2011-04-27 | 一重集团大连设计研究院有限公司 | Partition plate device of casting system of double-roller continuous casting machine |
| CN102029364B (en) * | 2010-12-30 | 2012-12-05 | 一重集团大连设计研究院有限公司 | Partition plate device of casting system of double-roller continuous casting machine |
| CN103878348A (en) * | 2014-03-24 | 2014-06-25 | 中国重型机械研究院股份公司 | Magnesium alloy sheet belt continuous production device and technology |
| CN103878348B (en) * | 2014-03-24 | 2015-08-19 | 中国重型机械研究院股份公司 | A kind of magnesium alloy board continuous producing apparatus and technique |
| CN104923793A (en) * | 2015-06-16 | 2015-09-23 | 昆明理工大学 | Continuous rolling extrusion device |
| CN108941488A (en) * | 2018-07-25 | 2018-12-07 | 芜湖凌梦电子商务有限公司 | A kind of edge guard of double-roll type thin plate casting machine |
| CN110170626A (en) * | 2019-06-20 | 2019-08-27 | 中冶赛迪工程技术股份有限公司 | A kind of casting pre-cooling casting device |
| CN110170626B (en) * | 2019-06-20 | 2024-02-06 | 中冶赛迪工程技术股份有限公司 | Casting-rolling precooling pouring device |
| CN114269492A (en) * | 2019-07-03 | 2022-04-01 | 斯佩拉有限公司 | Melt supply for a strip casting installation |
| CN114269492B (en) * | 2019-07-03 | 2023-05-09 | 斯佩拉有限公司 | Melt supply for a strip casting plant |
| US11673184B2 (en) | 2019-07-03 | 2023-06-13 | Speira Gmbh | Melt feeding for strip casting systems |
| CN112238212A (en) * | 2020-10-29 | 2021-01-19 | 燕山大学 | Double-roller thin-strip casting-rolling electromagnetic extrusion type metal molten pool side sealing method and side sealing device thereof |
| CN112238212B (en) * | 2020-10-29 | 2021-07-06 | 燕山大学 | Double-roller thin-strip casting-rolling electromagnetic extrusion type metal molten pool side sealing method and side sealing device thereof |
| CN113857447A (en) * | 2021-09-28 | 2021-12-31 | 山东理工大学 | Device and method for simulating key transmission mechanism of double-roller casting-rolling molten pool |
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| CN100368120C (en) | 2008-02-13 |
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Granted publication date: 20080213 Termination date: 20101202 |