CN210188431U - Progressive solidification forming device for large cast ingot or cast blank - Google Patents
Progressive solidification forming device for large cast ingot or cast blank Download PDFInfo
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- CN210188431U CN210188431U CN201920265738.9U CN201920265738U CN210188431U CN 210188431 U CN210188431 U CN 210188431U CN 201920265738 U CN201920265738 U CN 201920265738U CN 210188431 U CN210188431 U CN 210188431U
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Abstract
The utility model provides a progressive solidification forming device of large-scale ingot casting or casting blank. The device comprises a casting ladle, a crystallizer cover, a crystallizer, a spray head, a supporting roller set and a billet pulling rod, wherein the crystallizer consists of a copper plate, a water cooling pipe is paved on the outer side of the copper plate of the crystallizer, the spray head and the supporting roller set are fixed on a movable metal frame and can move together with the crystallizer, a large casting billet can be separately and discretely poured in a partitioned mode and gradually solidified and accumulated to form a required ingot or casting billet. The utility model discloses it is fast to have solidification speed for other devices now, and the composition is even, and metal lumber recovery is high, and inclusion content is low in the ingot casting, and production is nimble, and the product is various, and production cycle is short, and economic benefits is showing characteristics such as.
Description
Technical Field
The utility model relates to a progressive solidification forming device of large-scale ingot casting or casting blank belongs to metal material shaping technical field.
Background
The traditional large casting blank is manufactured by pouring molten metal into a steel die at one time and cooling and solidifying for a long time, and the casting defects of loose macro shrinkage cavity, macro segregation, thick structure and the like of the cast structure of the large casting blank often appear. These defects have numerous adverse effects on the final structure and often need to be eliminated by heat treatment or other processes, such as macrosegregation by long term high temperature diffusion annealing. Therefore, obtaining a high-quality large-scale casting and forging piece inevitably consumes a long time, and the large-scale cast ingot or cast blank inevitably has quality defects just because of long-time solidification, and meanwhile, the long-time solidification process and the subsequent treatment process obviously improve the production cost and the production period and increase the energy consumption.
In order to meet the requirements for the quality of the steel, in particular the homogeneity of the structure of the entire cross-section, the metal utilization can only be deliberately reduced. In addition, for heavy steel ingots, the risk of scrap of the steel ingots is particularly high due to the local concentration of non-metallic inclusions in the core of the steel ingots. However, there are limitations to improving the internal defects of these casting blanks by means of electroslag metallurgy and electromagnetic stirring techniques. Therefore, it is necessary to shorten the solidification time of a large ingot or a casting blank and improve protective pouring measures to improve the quality of a large-sized cast and forged part.
In order to make up the deficiency of the one-time pouring and solidifying forming device for large steel ingots or steel billets, the utility model provides a progressive solidifying and forming device for large steel ingots or steel billets. The device separately pours the large steel ingot or steel billet in different areas, and gradually solidifies and accumulates to form the required shape and size, so as to achieve the purposes of eliminating the segregation and loosening defects, homogenizing the components and the structure and improving the quality of the steel ingot, and the device is a compact short-period steel ingot or steel billet production process.
Disclosure of Invention
An object of the utility model is to provide a be applicable to large-scale ingot casting or casting blank solidification shaping gradually device. The device can obviously accelerate the solidification speed of the cast ingot and shorten the solidification time, thereby effectively reducing or even avoiding the internal quality problems of the large cast ingot, such as macroscopic porosity and shrinkage cavity, macroscopic segregation, thick tissue and the like, and providing technical support for producing high-quality large cast-forged pieces.
In order to realize the above purpose, the utility model discloses based on pour into the not unidimensional crystallizer with the ladle of different tonnages step by step with the molten metal and solidify, the ingot casting that the last step was solidified becomes the axle center before beginning to solidify on next step, and the reciprocal thought that solidifies the accumulation gradually and form the target dimension ingot casting of circulation adopts following technical scheme: a progressive solidification forming device for large-scale cast ingots or cast blanks comprises a casting ladle, a crystallizer cover, a crystallizer, a spray head, a support roller set and a blank drawing rod, wherein a water outlet is formed in the lower surface of the casting ladle, and the crystallizer cover is provided with a water inlet and an exhaust hole and is arranged on the crystallizer; the water outlet of the casting ladle is connected with the water inlet of the crystallizer, and a sealing gasket is arranged between the water outlet of the casting ladle and the water inlet of the crystallizer; the crystallizer is flexible in size and can be expanded along the radial direction, inert gas is filled in the crystallizer before casting, and a water-cooling pipe is laid on the outer side of a crystallizer copper plate; the spray head and the supporting roller set are fixed on the movable metal frame and can move together with the crystallizer, the spray nozzles can be independently controlled, and the supporting roller set is used for supporting and guiding a metal blank pulled out of the crystallizer; the crystallizer and the movable metal bracket are driven by a motor; the blank pulling rod is connected with the motor, is initially arranged below the crystallizer, and is driven by the motor to pull out the metal blank from the crystallizer after the metal liquid in the crystallizer is initially solidified.
The utility model discloses large-scale regular ingot casting or casting blank adopt solidification forming device's characteristics gradually lie in: is completed by a multi-step combined solidification device comprising a casting ladle, a crystallizer and a water spraying device. The initial solidification device is similar to continuous casting, metal blanks are pulled out by a blank pulling rod after molten metal is solidified in a water-cooled crystallizer until the height of the metal blanks is the same as that of the target cast ingots, and the pouring is finished; the size of the crystallizer is enlarged, the crystallizer is moved to enable the bottom end of the crystallizer to be flush with the bottom of the casting blank solidified in the previous step or to stay at any height of the casting blank solidified in the previous step, the molten metal is injected again, the crystallizer, the water spraying device and the supporting roller set slowly move upwards along the casting blank from the bottom along with the solidification of the molten metal until the height of the newly solidified metal blank is the same as that of the casting blank solidified in the previous step or the height of the newly solidified metal ingot is equal to the required solidification height, and the pouring is finished; and repeating the processes until the target ingot or casting blank size is finally obtained.
The utility model discloses still relate to a solidification forming device that advances gradually that is used for large-scale ingot casting or casting blank, its characterized in that: the casting device comprises a casting ladle 1, a crystallizer cover 5, a crystallizer 6, a spray head 8, a support roller set 9 and a throwing rod 10, wherein a water outlet 2 is arranged below the casting ladle 1, a water inlet 4 and an exhaust hole 11 are arranged on the crystallizer cover 5, and a sealing gasket 3 is arranged between the water outlet 2 of the casting ladle and the water inlet 4 of the crystallizer; the crystallizer 6 is composed of a copper plate, a water cooling pipe 7 is laid on the outer side of the copper plate of the crystallizer, and the spray head 8 and the support roller group 9 are both fixed on a movable metal frame and can move together with the crystallizer; the pulling bar 10 is driven by a motor and is initially placed at the end of the crystalliser 6.
Furthermore, the outer side of the crystallizer cover contacting with air is a metal layer, the material is generally steel, the inner side is an aluminum-magnesium-carbon refractory material, and the thickness of the refractory material layer is 3-8 cm.
Further, before casting begins, the exhaust holes 11 are connected with an inert gas conveying device, inert gas is introduced into the gas conveying device, gas conveying is stopped after casting is started, and redundant gas overflows from the exhaust holes 11.
Furthermore, the crystallizer 6 is formed by splicing a plurality of copper plates, can be expanded along the radial direction and has flexible size; the crystallizer is arranged on the movable support 12, and small-amplitude vibration and large-range movement of the crystallizer can be realized.
Further, the spray head 8 and the supporting roller group 9 are both fixed on a movable metal frame 13 and move slowly upwards along the cast ingot together with the crystallizer in the continuous solidification process.
Further, in the process of initial ingot core solidification, the crystallizer 6, the spray head 8 and the support roller group 9 do not displace, the blank pulling rod 10 pulls the initial ingot core out of the crystallizer, and meanwhile, the spray head 8 is opened for water spraying cooling until the initial ingot core height is the same as the target ingot height.
Further, the method is used for continuous solidification of the ingot core wrapping layers, the radial size of the crystallizer 6 is enlarged at the solidification initial stage of each layer of the ingot core wrapping layers, the crystallizer 6 is moved to enable the bottom end of the crystallizer to be flush with the bottom of the ingot solidified in the previous step or the crystallizer 6 is moved to enable the bottom end of the crystallizer to stop at any height of the ingot 14 solidified in the previous step; after the ingot core wrapping layer begins to solidify, the crystallizer 6, the spray head 8 and the supporting roller group 9 simultaneously and slowly move upwards along the ingot until the height of the newly solidified wrapping layer is the same as that of the ingot solidified in the previous step or the height of the newly solidified metal ingot is equal to that of the solidified ingot reaching the required solidification height.
Further, in the continuous solidification stage, the crystallizer 6 is connected with the casting ladle 1 through the water inlet 4 on the crystallizer cover 5, and the casting ladle 1 and the crystallizer 6 move together, so that the casting and solidification can be ensured while the crystallizer is moved, and the ingot casting forming speed is accelerated.
The utility model discloses large-scale regular ingot casting or casting blank adopt solidification forming device's advantage gradually to lie in: a crystallizer cover is arranged on the crystallizer, and protective gas is introduced into the crystallizer to thoroughly prevent air from entering molten metal, so that the content of impurities in the ingot is reduced, and the quality of the ingot is improved; the size and the shape of the crystallizer are flexible, so that the production is flexible and the products are various; the water inlet on the crystallizer lid is connected with the ladle delivery port of watering, can guarantee that the limit is poured and is solidified when removing the crystallizer, simultaneously the utility model discloses a it is fast that the subregion pouring solidification has solidification speed for current other devices, and the composition is even, and metal lumber recovery is high, and production cycle is short, and economic benefits is showing.
Drawings
FIG. 1 is a schematic view of an initial coagulation apparatus of the present invention;
FIG. 2 is a schematic view of a continuous solidification apparatus according to the present invention, wherein (a) is a starting state and (b) is a casting state;
fig. 3 is a front view of the arrangement of the motor and the metal frame of the crystallizer, the spray head and the supporting roller set of the device of the invention, (a) is a front view of the arrangement of the motor and the metal frame for the movement of the crystallizer, (b) is a front view of the arrangement of the motor and the metal frame for the movement of the spray nozzle and the supporting roller set;
fig. 4 is a top view of the arrangement of the motor and the metal frame of the crystallizer, the spray head and the supporting roller set of the device of the present invention.
Detailed Description
As shown in fig. 1-2, a schematic diagram of a stepwise solidification device of a progressive solidification molding device for large ingots or casting blanks comprises a casting ladle 1, a crystallizer cover 5, a crystallizer 6, a spray head 8, a support roller set 9 and a blank drawing rod 10, wherein a water outlet 2 is arranged below the casting ladle 1, a water inlet 4 and an exhaust hole are arranged on the crystallizer cover 5, and a sealing gasket 3 is arranged between the casting ladle water outlet 2 and the crystallizer water inlet 4; the crystallizer 6 is formed by splicing a plurality of copper plates, has flexible size and can be expanded along the radial direction, a water-cooling pipe 7 is laid on the outer side of the copper plate of the crystallizer, and the spray head 8 and the support roller group 9 are both fixed on a movable metal frame and can move together with the crystallizer; the pulling bar 10 is driven by a motor and is initially placed at the end of the crystalliser 6.
The specific use method of the device is as follows:
(1) before casting, introducing inert gas into a crystallizer 6 through an exhaust hole 5 until the crystallizer is full of inert gas;
(2) pouring molten metal into a crystallizer 6 through a pouring ladle 1 via a pouring ladle water outlet 2 and a crystallizer water inlet 3, after the molten metal is primarily solidified, pulling a metal blank out of the crystallizer by using a blank pulling rod 10, simultaneously starting a spray head 8 for water spray cooling until the height of the metal ingot is the same as that of a target ingot, and finishing the pouring, as shown in fig. 1;
(3) enlarging the radial dimension of the crystallizer 6, moving the crystallizer 6 to make the bottom end of the crystallizer flush with the bottom of the ingot solidified in the previous step or moving the crystallizer 6 to make the bottom end of the crystallizer stop at any height of the ingot solidified in the previous step, and simultaneously moving the spray head 8 and the support roller group 9, as shown in fig. 2 (a);
(4) pouring molten metal into the crystallizer 6 again by using the casting ladle 1 continuously, and moving the crystallizer 6, the spray head 8 and the support roller group 9 upwards slowly from the bottom along the casting blank along with the solidification of the molten metal until the height of a newly solidified metal ingot is the same as that of the cast ingot solidified in the previous step or the height of the newly solidified metal ingot is equal to that of the required solidification height, and finishing the pouring, as shown in fig. 2 (b);
(5) and (5) repeating the steps (3) to (4) until the target ingot or casting blank size is finally obtained, and ending.
The present invention is described in detail by the above embodiments, but the present invention is not limited to the above detailed process equipment and process flow, i.e. not meaning the present invention must rely on the above detailed process equipment and process flow to implement. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (8)
1. The progressive solidification forming device for the large cast ingot or cast blank is characterized in that: the casting device comprises a casting ladle (1), a crystallizer cover (5), a crystallizer (6), a spray head (8), a supporting roller set (9) and a throwing rod (10), wherein the crystallizer (6) is composed of a copper plate, a water cooling pipe (7) is laid on the outer side of the crystallizer copper plate, and the spray head (8) and the supporting roller set (9) are fixed on a movable metal frame (13) and can move together with the crystallizer.
2. The progressive solidification forming device of a large ingot or a casting blank according to claim 1, wherein the outer side of the mold cover contacting with air is a metal layer, the inner side is an aluminum-magnesium-carbon refractory, and the thickness of the refractory is 3-8 cm.
3. The apparatus of claim 2, wherein the metal layer is steel.
4. The progressive solidification forming apparatus of a large ingot or billet according to claim 1 further comprising an exhaust port (11) and an inert gas delivery means, the exhaust port (11) being connectable to the inert gas delivery means.
5. The progressive solidification forming apparatus of a large ingot or slab as claimed in claim 1, wherein the mold (6) is formed by splicing a plurality of copper plates, and is expandable in a radial direction; the crystallizer is arranged on the movable support (12), and small-amplitude vibration and large-range movement of the crystallizer can be realized.
6. A large ingot or billet progressive solidification forming apparatus as claimed in claim 1 or claim 5 in which the crystalliser (6), the nozzle (8) and the set of support rollers (9) are simultaneously moved slowly upwardly along the ingot.
7. A large ingot or billet progressive solidification forming apparatus as claimed in claim 6, wherein the mold (6) is connected to the ladle (1) through a water inlet (4) in the mold cover (5), the ladle (1) being movable with the mold (6).
8. The progressive solidification forming device of a large ingot or casting blank according to claim 1, wherein a water outlet (2) is arranged below the casting ladle (1), a water inlet (4) and an exhaust hole (11) are arranged on the crystallizer cover (5), and a sealing gasket (3) is arranged between the casting ladle water outlet (2) and the crystallizer water inlet (4); the pulling bar (10) is driven by a motor and is initially arranged at the tail end of the crystallizer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265738.9U CN210188431U (en) | 2019-03-01 | 2019-03-01 | Progressive solidification forming device for large cast ingot or cast blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265738.9U CN210188431U (en) | 2019-03-01 | 2019-03-01 | Progressive solidification forming device for large cast ingot or cast blank |
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| Publication Number | Publication Date |
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| CN210188431U true CN210188431U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920265738.9U Active CN210188431U (en) | 2019-03-01 | 2019-03-01 | Progressive solidification forming device for large cast ingot or cast blank |
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| CN (1) | CN210188431U (en) |
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