CN212285800U - Electromagnetic energy buffering runner device for refining aluminum alloy grains - Google Patents
Electromagnetic energy buffering runner device for refining aluminum alloy grains Download PDFInfo
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- CN212285800U CN212285800U CN202020519507.9U CN202020519507U CN212285800U CN 212285800 U CN212285800 U CN 212285800U CN 202020519507 U CN202020519507 U CN 202020519507U CN 212285800 U CN212285800 U CN 212285800U
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Abstract
The utility model discloses an electromagnetic energy buffering chute device for refining aluminum alloy crystal grains, which relates to the technical field of metallurgy and metal material preparation, wherein a plurality of electromagnetic energy crystal grain refining devices are arranged above a buffering chute, a groove body of the buffering chute comprises a bottom plate and a side wall plate fixed above the bottom plate, both ends of the side wall plate are respectively provided with a chute inlet and a chute outlet, a plurality of side wall plates are fixed on the inner wall of the side wall plate, a gap exists between any two side wall plates, a plurality of middle wall plates are fixed in the middle of the bottom plate, a gap exists between any two middle wall plates, and a gap exists between any one middle wall plate and any one side wall plate; the electromagnetic energy grain refining device comprises an iron core and wire coils, wherein the wire coils are wound on the iron core, two adjacent turns of the wire coils are mutually insulated, and the wire coils are mutually insulated from the iron core. The device can guarantee the magnetic field treatment time of the aluminum alloy melt, effectively reduce the size of cast ingot grains and improve the product quality.
Description
Technical Field
The utility model relates to a metallurgical and metal material preparation technical field especially relates to a be used for aluminum alloy crystalline grain to refine electromagnetic energy buffering chute device.
Background
In recent years, research and application of wrought aluminum alloy formed parts have attracted much attention. To obtain wrought aluminium alloy shaped articles with excellent properties, first a high quality wrought aluminium alloy initial ingot blank is required. However, the wrought aluminum alloy ingot blank generally has the problem of coarse structure, which is not favorable for the subsequent hot working of the ingot blank and also influences the performance of the product. The grain refinement can reduce the defects of ingot blank segregation and the like, improve the uniformity of the structure and the mechanical property thereof, improve the formability in the subsequent processing process (such as extrusion and rolling), and ensure that the grain size is fine and uniform after recrystallization, so the grain refinement is an important method for the quality of the deformed aluminum alloy ingot.
The grain refining method mainly comprises the steps of adding a grain refiner and a physical method. The electromagnetic treatment method in the physical method does not contact with the melt, so that the melt is not polluted and is not influenced by alloy components, and the electromagnetic treatment method becomes a research hotspot and is applied to industrial production. The low-frequency electromagnetic field is applied in the casting process, and the structure of the cast ingot is obviously refined under the action of electromagnetic energy, the structure distribution and uniformity are improved, and the hot cracking tendency of the cast ingot is reduced. The application of electromagnetic energy results in reduced ingot segregation while significantly increasing yield strength, hardness and elongation at break.
In the actual production, the furnace is 3-30t, the flow velocity in the launder is too high at 30t, the aluminum alloy is refined by the aluminum alloy electromagnetic energy grain refining technology in the grain refining process, certain requirements are imposed on the flow velocity of the aluminum alloy melt, the flow velocity of the aluminum alloy melt in the launder is too high, the electromagnetic energy application time is short, and the grain refining effect of the aluminum alloy cannot reach the optimal level. Meanwhile, in the invention, the electromagnetic energy grain refining equipment is arranged at the inlet of the launder, the flow rate is 2cm/s, the electromagnetic energy acting area is 500mm, the processing time is 25s, the grain refining rate is 3.61%, and the problem of poor grain refining effect exists.
SUMMERY OF THE UTILITY MODEL
For solving above technical problem, the utility model provides a be used for aluminum alloy crystalline grain to refine electromagnetic energy buffering chute device guarantees aluminum alloy fuse-element magnetic field treatment time, effectively reduces ingot casting crystalline grain size, improves product quality.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides an electromagnetic energy buffering launder device for refining aluminum alloy crystal grains, which comprises a buffering launder and a plurality of electromagnetic energy crystal grain refining devices, wherein the electromagnetic energy crystal grain refining devices are arranged above the buffering launder, the buffer runner comprises a trough body, a plurality of side baffles and a plurality of middle baffles, the trough body comprises a bottom plate and side wall plates fixed above the bottom plate, the two ends of the side enclosing plate are respectively provided with a launder inlet and a launder outlet, a plurality of side baffle plates are fixed on the inner wall of the side enclosing plate, the lower ends of the side baffles are fixed on the bottom plate, a gap exists between any two side baffles, the plurality of middle baffles are fixed in the middle of the bottom plate, a gap exists between any two middle baffles, and a gap exists between any one middle baffle and any one side baffle; the electromagnetic energy grain refining device comprises an iron core and a lead coil, wherein the lead coil is wound on the iron core, two adjacent turns of the lead coil are mutually insulated, and the lead coil and the iron core are mutually insulated.
Preferably, the side enclosing plates comprise two first side plates and two second side plates, the two first side plates are arranged on the bottom plate in parallel, the two second side plates are arranged on the bottom plate in parallel, the first side plates are perpendicular to the second side plates, the adjacent first side plates are connected with the second side plates, the middle parts of the two first side plates are respectively provided with the launder inlet and the launder outlet, the inner wall of each second side plate is fixedly connected with a plurality of side baffle plates, the lower ends of the side baffle plates are fixed on the bottom plate, and the side baffle plates are perpendicular to the second side plates.
Preferably, a plurality of the middle baffles are parallel to each other, the middle baffles are parallel to the side baffles, and the middle baffles and the side baffles are arranged non-collinearly.
Preferably, the launder inlet and launder outlet are symmetrically arranged.
Preferably, the length of the middle baffle is greater than the width of the launder inlet and launder outlet.
Preferably, the side baffles on the two second side plates are symmetrically arranged, and the length of the middle baffle is greater than the gap between the two symmetrically arranged side baffles.
Preferably, talcum powder is coated inside the groove body.
Preferably, the iron core is the silicon steel chip, the lead coil is the solenoid shape of being made by hollow high temperature enameled copper wire winding, the both ends of hollow high temperature enameled copper wire are cooling water entry and cooling water export respectively.
Preferably, an insulating fiber is arranged between the two adjacent turns of the conductive coil, and an insulating fiber is arranged between the conductive coil and the iron core.
The utility model discloses for prior art gain following technological effect:
the utility model provides an electromagnetic energy buffering runner device for refining aluminum alloy crystal grains, which comprises a buffering runner and a plurality of electromagnetic energy crystal grain refining devices, wherein the electromagnetic energy crystal grain refining devices are arranged above the buffering runner, the buffering runner comprises a trough body, a plurality of side baffles and a plurality of middle baffles, an aluminum alloy melt enters the trough body, under the action of the side baffle and the middle baffle, the resistance is increased, the flowing state of the aluminum alloy melt is changed, the turbulent flow phenomenon is generated, a small vortex is formed, the flow speed of the aluminum alloy melt in the flowing process in the buffer runner is reduced, the flow path is increased, the time of the aluminum alloy melt in the action area of the magnetic field is increased, the grain refining effect of the aluminum alloy is optimal, meanwhile, the number of the electromagnetic energy grain refining devices can be adjusted according to the length of the buffer launder, so that the aluminum alloy solidification structure can be effectively refined.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an electromagnetic energy buffering runner device for refining aluminum alloy grains according to the present invention;
FIG. 2 is a schematic structural view of the buffer chute of the present invention;
FIG. 3 is a photograph of the metallographic structure of an aluminum alloy ingot obtained when a magnetic field is applied but the treatment time is short;
figure 4 is adopting the utility model provides a device obtains aluminum alloy ingot casting tissue metallographic picture.
Description of reference numerals: 1. an iron core; 2. a conductive coil; 3. a cooling water inlet; 4. a cooling water outlet; 5. A buffer runner; 51. a base plate; 52. a first side plate; 53. a second side plate; 54. a launder inlet; 55. a launder outlet; 56. a side dam; 57. a middle baffle; 6. an aluminum alloy melt.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a be used for aluminum alloy crystalline grain to refine electromagnetic energy buffering chute device guarantees aluminum alloy fuse-element magnetic field treatment time, effectively reduces ingot casting crystalline grain size, improves product quality.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1-2, the present embodiment provides an electromagnetic energy buffering runner device for refining aluminum alloy grains, which includes a buffering runner 5 and a plurality of electromagnetic energy grain refining devices, the plurality of electromagnetic energy grain refining devices are disposed above the buffering runner 5, the buffering runner 5 includes a tank body, a plurality of side baffles 56 and a plurality of middle baffles 57, the tank body includes a bottom plate 51 and side baffles fixed above the bottom plate 51, both ends of the side baffles are respectively provided with a runner inlet 54 and a runner outlet 55, the plurality of side baffles 56 are fixed on the inner wall of the side baffles, the lower ends of the side baffles 56 are fixed on the bottom plate 51, a gap exists between any two side baffles 56, the plurality of middle baffles 57 are fixed in the middle of the bottom plate 51, a gap exists between any two middle baffles 57, and a gap exists between any one middle baffle 57 and any one side baffle 56; the electromagnetic energy grain refining device comprises an iron core 1 and a lead coil 2, wherein the lead coil 2 is wound on the iron core 1, two adjacent turns of the lead coil 2 are mutually insulated, the lead coil 2 and the iron core 1 are mutually insulated, the lead coil 2 is driven by a special power supply, and the loading waveform in the embodiment can adopt various waveform peak currents.
The buffering chute 5 is arranged between a main chute connected with the smelting furnace and a pouring disc, after metal is placed into the smelting furnace to be melted, the aluminum alloy melt 6 flows into the buffering chute 5 from the main chute, a special power supply is started, the aluminum alloy melt 6 entering the buffering chute 5 is subjected to magnetic field treatment, the aluminum alloy melt 6 passes through the buffering chute 5 to obtain the electromagnetic aluminum alloy melt 6, and after entering the pouring disc, pouring is carried out, and an aluminum ingot with refined crystal grains is obtained after cooling. The aluminum alloy melt 6 enters the buffer launder 5, the resistance is increased under the action of the side baffle plate 56 and the middle baffle plate 57, the flowing state of the aluminum alloy melt 6 is changed, the turbulent flow phenomenon is generated, small vortexes are formed, the flow speed of the aluminum alloy melt 6 flowing in the buffer launder 5 is reduced, the flowing path is increased, the time of the aluminum alloy melt 6 in the action area of the magnetic field is increased, the aluminum alloy grain refining effect is optimal, and meanwhile, the number of electromagnetic energy grain refining devices can be adjusted according to the length of the buffer launder 5, so that the aluminum alloy solidification structure is effectively refined, and the performance of the aluminum alloy is improved. As shown in fig. 3 to 4, the grain size of the aluminum alloy ingot obtained in the case where the magnetic field is applied but the treatment time is short is larger than that of the aluminum alloy ingot obtained by the apparatus in this example, and it can be seen that a better effect of refining the aluminum alloy grains is achieved by the apparatus in this example.
For a given main runner cross-section, the velocity in the main runner satisfies the following equation: the volume flow (Q) is equal to the average flow velocity (v) multiplied by the sectional area (A), the aluminum liquid passes through the main runner, the time is 1.5h and the flow of the main runner is 0.00205m3S, cross-sectional area of the main flow channel is 120X 120 (mm)2) The flow velocity is 14cm/s, it can be seen that the flow velocity of the aluminum alloy melt 6 flowing out of the main runner is too high, and in order to reduce the flow velocity of the aluminum alloy melt 6, the rear end of the main runner is arranged in the embodimentThe buffer launder 5 provided with side dams 56 and a middle dam 57 is connected. In the flowing process of the aluminum alloy melt 6, the flow speed is reduced due to the obstruction of the side baffle plates 56 and the middle baffle plates 57, and after the side baffle plates 56 and the middle baffle plates 57 are added, the flowing path of the aluminum alloy melt 6 is increased, so that the time of the aluminum alloy melt 6 in the action area of the magnetic field is increased, and the grain refining effect reaches the optimal state. Laminar flow is an ideal flowing state of fluid, the aluminum alloy melt 6 is close to the laminar flow state in the main runner, the aluminum alloy melt 6 enters the buffer runner 5 and contacts the side baffle 56 and the middle baffle 57, the aluminum alloy melt 6 is in a turbulent flow state, streamline of mass points of the aluminum alloy melt 6 are interwoven together, and under the action of the side baffle 56 and the middle baffle 57, the aluminum alloy melt 6 generates speed loss. In the buffer launder 5, a turbulent phenomenon occurs in the peripheral areas of the side dams 56 and the middle dam 57, and as small eddies are generated, the flow rate of the aluminum alloy melt 6 decreases and the magnetic field treatment time increases. Aluminum alloy melt 6 particles enter at launder entrance 54 and exit at launder exit 55 into the electromagnetic energy affected zone for at least 40 seconds. Therefore, the device in the embodiment has a wide application range, can meet the requirement of refining 3-30t of aluminum liquid crystal grains, ensures the grain refining effect, does not contact the aluminum alloy melt 6, can treat the aluminum alloy melt 6 above a liquidus line, promotes nucleation, and improves the nucleation rate.
Specifically, the trough body is a cuboid structure with an upper opening, the side wall plates comprise two first side plates 52 and two second side plates 53, the two first side plates 52 are arranged on the bottom plate 51 in parallel, the two second side plates 53 are arranged on the bottom plate 51 in parallel, the first side plates 52 are perpendicular to the second side plates 53, the adjacent first side plates 52 are connected with the second side plates 53, the middles of the two first side plates 52 are respectively provided with a launder inlet 54 and a launder outlet 55, a plurality of side baffle plates 56 are fixedly connected to the inner wall of each second side plate 53, the lower ends of the side baffle plates 56 are fixed on the bottom plate 51, and the side baffle plates 56 are perpendicular to the second side plates 53.
Specifically, the plurality of middle baffles 57 are parallel to each other, the middle baffles 57 are parallel to the side baffles 56, and the middle baffles 57 are disposed non-collinearly with the side baffles 56. The launder inlet 54 and launder outlet 55 are symmetrically arranged, and a middle baffle 57 is arranged on the inner side of the launder inlet 54 and the inner side of the launder outlet 55, and the length of the middle baffle 57 is greater than the width of the launder inlet 54 and launder outlet 55.
Specifically, the side guards 56 on the two second side plates 53 are symmetrically arranged, and the length of the middle guard 57 is greater than the gap between the two symmetrically arranged side guards 56.
In this embodiment, the trough body, the side baffles 56 and the middle baffle 57 are all made of refractory material. In order to further reduce the flow velocity of the aluminum alloy melt 6 in the tank body, talcum powder is coated inside the tank body.
Specifically, iron core 1 is the silicon steel chip, and lead coil 2 is the solenoid shape of being made by hollow high temperature enameled copper wire winding, and the both ends of hollow high temperature enameled copper wire are cooling water inlet 3 and cooling water outlet 4 respectively, and lead coil 2 twines in the silicon steel chip outside promptly, and leads to the inside cooling water that leads to of 2 of lead coil. When the electromagnetic energy grain refining device is used, cooling water is introduced into the guide coil 2, the special power supply is started, the pulse frequency is controlled at 20Hz, the peak current is controlled at 100A, the duty ratio d is set to be 20%, the aluminum alloy melt 6 starts to be poured after the special power supply starts to work, the guide coil 2 excites the silicon steel chip to generate a magnetic field when the peak current is introduced into the guide coil 2, electromagnetic energy treatment is started to be carried out on the aluminum alloy melt 6, and the electromagnetic energy grain refining device keeps a working state in the casting process until the casting is finished. The magnetic induction intensity on the surface of the magnetic pole is ensured to be more than 0.6T in the working process, the distance between the magnetic pole and the liquid level is not more than 10mm, the magnetic induction intensity can be ensured by adjusting the current value of a special power supply, increasing 2 turns of a conductive coil and the like, and thus the requirement of grain refinement is met.
In this embodiment, an insulating fiber is disposed between two adjacent turns of the conductive coil 2, and an insulating fiber is disposed between the conductive coil 2 and the iron core 1.
When the device in the embodiment is used for aluminum liquid electromagnetic energy treatment, the retention time of the aluminum liquid in the buffer launder 5 is not less than 40s, the speed difference of the main section is not more than 10 percent, the flow field distribution in the buffer launder 5 is reasonable, and the flow velocity distribution of the main section is uniform; ensuring that the penetration depth of a magnetic field in liquid under the magnetic pole is not less than 50mm and the strength is not less than 0.2T; by forming a reasonable flow field, the maximum deviation of the temperature in the buffer launder 5 is not more than 5 ℃, dead zones do not occur, the temperature is uniform, the fluidity is good, and the quality of the aluminum alloy product is effectively improved. The flow field of the aluminum liquid in the buffer launder 5 is reasonably organized, the magnetic field distribution of the aluminum liquid in the buffer launder 5 is coordinated, and the temperature distribution in the buffer launder 5 is controlled, so that the efficient, rapid and uniform treatment of the electromagnetic energy on the aluminum liquid can be realized, and the expected treatment effect is achieved.
When the electromagnetic energy treatment is carried out on the aluminum alloy melt 6, the aluminum alloy melt 6 is acted by the electromagnetic force, the growth of crystal grains is limited, and the electromagnetic energy treatment is proved to have good crystal grain refining effect and promote the movement of crystal nuclei.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. The electromagnetic energy buffering launder device for aluminum alloy grain refinement is characterized by comprising a buffering launder and a plurality of electromagnetic energy grain refinement devices, wherein the plurality of electromagnetic energy grain refinement devices are arranged above the buffering launder, the buffer runner comprises a trough body, a plurality of side baffles and a plurality of middle baffles, the trough body comprises a bottom plate and side wall plates fixed above the bottom plate, the two ends of the side enclosing plate are respectively provided with a launder inlet and a launder outlet, a plurality of side baffle plates are fixed on the inner wall of the side enclosing plate, the lower ends of the side baffles are fixed on the bottom plate, a gap exists between any two side baffles, the plurality of middle baffles are fixed in the middle of the bottom plate, a gap exists between any two middle baffles, and a gap exists between any one middle baffle and any one side baffle; the electromagnetic energy grain refining device comprises an iron core and a lead coil, wherein the lead coil is wound on the iron core, two adjacent turns of the lead coil are mutually insulated, and the lead coil and the iron core are mutually insulated.
2. The device for buffering the launder of electromagnetic energy for aluminum alloy grain refinement according to claim 1, wherein the side walls include two first side plates and two second side plates, the two first side plates are disposed in parallel on the bottom plate, the two second side plates are disposed in parallel on the bottom plate, the first side plates are perpendicular to the second side plates, the adjacent first side plates are connected to the second side plates, the launder inlet and the launder outlet are disposed at the middle of each of the two first side plates, a plurality of side baffles are fixedly connected to the inner wall of each of the second side plates, and the side baffles are perpendicular to the second side plates.
3. The buffered launder apparatus for aluminum alloy grain refining electromagnetic energy, according to claim 2, wherein a plurality of said central baffles are parallel to each other, said central baffles being parallel to said side baffles, said central baffles being non-collinear with said side baffles.
4. The apparatus of claim 3, wherein the launder inlet and the launder outlet are symmetrically arranged.
5. The apparatus of claim 4, wherein the length of the middle baffle is greater than the width of the launder inlet and the launder outlet.
6. The device of claim 3, wherein the side dams on the two second side plates are symmetrically arranged, and the length of the middle dam is greater than the gap between the symmetrically arranged side dams.
7. The electromagnetic energy buffering runner device for aluminum alloy grain refinement according to claim 1, characterized in that talcum powder is coated inside the groove body.
8. The electromagnetic energy buffering runner device for aluminum alloy grain refinement according to claim 1, characterized in that the iron core is a silicon steel chip, the wire guiding coil is in the shape of a solenoid wound by a hollow high-temperature enameled copper wire, and the two ends of the hollow high-temperature enameled copper wire are respectively a cooling water inlet and a cooling water outlet.
9. The buffered electromagnetic energy launder apparatus for aluminum alloy grain refinement according to claim 1, wherein insulation fibers are disposed between adjacent two turns of the wire coil, and insulation fibers are disposed between the wire coil and the iron core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020519507.9U CN212285800U (en) | 2020-04-10 | 2020-04-10 | Electromagnetic energy buffering runner device for refining aluminum alloy grains |
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| CN202020519507.9U CN212285800U (en) | 2020-04-10 | 2020-04-10 | Electromagnetic energy buffering runner device for refining aluminum alloy grains |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299525A (en) * | 2020-04-10 | 2020-06-19 | 包头铝业有限公司 | Electromagnetic energy buffering runner device for refining aluminum alloy grains |
| CN111299525B (en) * | 2020-04-10 | 2024-07-09 | 包头铝业有限公司 | Electromagnetic energy buffering launder device for aluminum alloy grain refinement |
-
2020
- 2020-04-10 CN CN202020519507.9U patent/CN212285800U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299525A (en) * | 2020-04-10 | 2020-06-19 | 包头铝业有限公司 | Electromagnetic energy buffering runner device for refining aluminum alloy grains |
| CN111299525B (en) * | 2020-04-10 | 2024-07-09 | 包头铝业有限公司 | Electromagnetic energy buffering launder device for aluminum alloy grain refinement |
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