CN210996367U - Melt processing device in hypereutectic aluminum-silicon alloy continuous casting process - Google Patents
Melt processing device in hypereutectic aluminum-silicon alloy continuous casting process Download PDFInfo
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- CN210996367U CN210996367U CN201922183419.6U CN201922183419U CN210996367U CN 210996367 U CN210996367 U CN 210996367U CN 201922183419 U CN201922183419 U CN 201922183419U CN 210996367 U CN210996367 U CN 210996367U
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Abstract
The utility model belongs to the technical field of metal material preparation is used, specifically disclose a fuse-element processing apparatus of hypereutectic aluminium-silicon alloy continuous casting in-process, by the molten bath subassembly, and the electromagnetic stirring subassembly that cooperatees and use with the molten bath subassembly is constituteed. The utility model has the advantages of: the powdery or granular alterant generates a large amount of 'heterogeneous' nucleation particles which are used as the 'core' of the primary silicon crystal, thereby improving the effective nucleation rate of the primary silicon, refining the primary silicon, changing the shape of the primary silicon, refining the primary silicon structure, reducing the using amount of the alterant and lowering the cost; the electromagnetic stirrer and the air flow stir the alloy melt, so that the temperature field and the component field of the alloy melt are more uniform while the rapid dispersion and strengthening of the alterant are promoted; the arrangement of the powder spraying pipe connected with the powder spraying device avoids the influence of the skin effect of an electromagnetic field, the distribution of the electromagnetic field is more uniform, the temperature field and the component field of the alloy melt are more uniform, and the hypereutectic aluminum-silicon alloy blank with high quality can be obtained.
Description
Technical Field
The utility model belongs to the technical field of metal material preparation is used, concretely relates to fuse-element processing apparatus of hypereutectic aluminium-silicon alloy continuous casting in-process.
Background
The hypereutectic aluminum-silicon alloy blank has the advantages of light weight, high strength, high wear resistance, high heat resistance, low thermal expansibility and the like, and is usually used for manufacturing key parts such as pistons, rotors, swash plates and the like of automobile transmitters. However, the hypereutectic aluminum-silicon alloy microstructure usually has the phenomena of coarse primary silicon and segregation of the primary silicon, and the mechanical property of the alloy is seriously reduced. Under the condition of common casting, the primary silicon is generally thicker, has a five-petal star shape, a plate shape, an octahedral shape and a complex appearance, has sharp edges and corners, and seriously cracks a matrix, so that the mechanical property and the cutting processing property of the hypereutectic aluminum-silicon alloy are reduced, and particularly the shaping is obviously reduced. Therefore, the form and the distribution of the primary silicon are improved, the size of the primary silicon is refined, the weakening effect of the primary silicon on the matrix performance is reduced, and the method has very important significance for improving the comprehensive performance of the hypereutectic aluminum-silicon alloy.
At present, in the continuous casting process of hypereutectic aluminum-silicon alloy blanks, the size and the shape of primary silicon of hypereutectic aluminum-silicon alloy are controlled by adopting a modification method. Chinese patent 201210042187.2 discloses an aluminum alloy modification process, wherein an intermediate alloy modifier is added to an alloy melt during the melting process of an aluminum alloy, and the modifier is melted in the alloy melt to form nucleation particles which are dispersed and distributed in the alloy melt, thereby acting on the nucleation and growth of primary silicon, and changing the size, shape and distribution of the primary silicon in the alloy. However, the modification process has the following defects when hypereutectic aluminum-silicon alloy blanks are continuously cast: (1) when the modifier is used, the modifier is added in a blocky or filiform mode, so that the modifier is not uniformly distributed in a melt and cannot achieve the effect of dispersion distribution, and the modifier is more in addition, low in utilization rate and poor in modification effect. (2) The modification process is usually carried out in a smelting furnace or a standing furnace, and the modification effect is easy to decline after the modification is finished until the pouring is finished. And the alloy melt has a long path, so that the modified nucleation particles are collided in the flowing process, the nucleation particles are reduced, and the modification effect of the modifier is seriously influenced. (3) Although the hypereutectic aluminum-silicon alloy continuous casting blank is subjected to modification treatment, the size and the shape of the primary silicon of the obtained hypereutectic aluminum-silicon alloy continuous casting blank are not fundamentally improved, the size of the primary silicon is still large, the average size of crystal grains still reaches more than 70 micro-grain meters, the shape is poor, and the hypereutectic aluminum-silicon alloy continuous casting blank is mainly in the shape of a lath. Therefore, it is difficult to obtain a high-quality hypereutectic aluminum-silicon alloy ingot by only the conventional modification treatment method.
Chinese patent 200810239936.4 discloses a method for rapidly preparing a hypereutectic aluminum-silicon alloy bar billet at low cost. Smelting the hypereutectic aluminum-silicon alloy under the protection of inert gas; refining the melt by composite modification at high temperature; then degassing the melt; and finally, performing rapid semi-continuous casting by adopting an electromagnetic stirring method. However, the process has the problems of segregation and uneven tissue distribution of primary silicon, and cannot fundamentally improve the dispersion distribution condition of the modifier in the aluminum alloy melt, and the primary silicon has uneven size and poor appearance. The semi-continuous casting by using the electromagnetic stirrer is also mentioned, and how to avoid the skin effect generated in the electromagnetic stirring process is not mentioned, and the online modifier and the online treatment of the melt in the continuous casting process are not mentioned.
Therefore, based on the above problems, the utility model provides a fuse-element processing apparatus in hypereutectic aluminium-silicon alloy continuous casting process.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a fuse-element processing apparatus of hypereutectic aluminium-silicon alloy continuous casting in-process, its project organization is reasonable, has refined the primary crystal silicon tissue, reduces the modificator quantity, the cost is reduced.
The technical scheme is that the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process comprises a molten pool component and an electromagnetic stirring component matched with the molten pool component for use, wherein the molten pool component comprises an outer shell, a molten pool arranged in the outer shell, a rotary electromagnetic stirring hollow shell arranged on the inner wall of the molten pool, a charged coil arranged in the rotary electromagnetic stirring hollow shell and a solution guide pipe arranged at the bottom of the outer shell, the electromagnetic stirring component comprises a transition molten pool connected with the guide pipe, a plurality of L-shaped solution conveying pipes arranged at the bottom of the transition molten pool, rotary electromagnetic stirring hollow outer shells respectively arranged on the L-shaped solution conveying pipes, a rotary electromagnetic stirring hollow inner shell arranged in the rotary electromagnetic stirring hollow shell, a first water-cooling inlet and a second water-cooling outlet arranged on the rotary electromagnetic stirring hollow shell, an auxiliary charged coil arranged in the rotary electromagnetic stirring hollow inner shell, a traveling wave stirring hollow outer shell respectively arranged on a plurality of L-shaped solution conveying pipes and positioned below the rotary electromagnetic stirring hollow stirring outer shell, a traveling wave stirring outer shell arranged in the electromagnetic stirring hollow spiral shell, a plurality of L-spiral stirring inner shell and a third electromagnetic stirring spiral magnetic stirring inner shell arranged on the electromagnetic stirring spiral shell and a spiral electromagnetic stirring spiral magnetic stirring spiral shell.
According to the technical scheme, the length of the solution conduit is 5 cm-8 cm.
According to the technical scheme, the number of the square-shaped magnets is four or six.
According to the technical scheme, the number of the spiral magnets is four or six.
According to the technical scheme, the melt treatment device in the hypereutectic aluminum-silicon alloy continuous casting process further comprises a powder spraying pipe and an argon protection guide pipe, wherein the powder spraying pipe is arranged in the molten pool and is matched with a solution in the molten pool for use.
According to the technical scheme, the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process further comprises a positioning seat arranged at the top end of the shell, a vertical external thread adjusting rod arranged on one surface of the positioning seat, a transverse ultrasonic detection probe mounting plate fixed on the vertical external thread adjusting rod through a group of locking nuts, and an ultrasonic detection probe arranged in one end of the transverse ultrasonic detection probe mounting plate, wherein the ultrasonic detection probe is connected with an ultrasonic detector.
Compared with the prior art, the utility model discloses a fuse-element processing apparatus of hypereutectic aluminium-silicon alloy continuous casting in-process's beneficial effect lies in: 1. the powdery or granular alterant generates a large amount of 'heterogeneous' nucleation particles which are used as the 'core' of the primary silicon crystal, thereby improving the effective nucleation rate of the primary silicon, refining the primary silicon, changing the shape of the primary silicon, refining the primary silicon structure, reducing the using amount of the alterant and lowering the cost; 2. the electromagnetic stirrer and the air flow stir the alloy melt, so that the temperature field and the component field of the alloy melt are more uniform while the rapid dispersion and strengthening of the alterant are promoted; 3. the arrangement of the powder spraying pipe connected with the powder spraying device avoids the influence of the skin effect of an electromagnetic field, the distribution of the electromagnetic field is more uniform, the temperature field and the component field of the alloy melt are more uniform, and the hypereutectic aluminum-silicon alloy melt is treated, so that the hypereutectic aluminum-silicon alloy blank with high quality can be obtained.
Drawings
FIG. 1 is a schematic structural view of a melt processing apparatus for a continuous casting process of hypereutectic aluminum-silicon alloy according to the present invention;
FIG. 2 is a schematic structural view of a transition molten pool and a plurality of L-shaped solution conveying pipes of the melt processing device in the continuous casting process of hypereutectic aluminum-silicon alloy according to the present invention;
FIG. 3 is a schematic structural view of a rotating electromagnetic stirring hollow shell and a live coil of the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process of the present invention;
FIG. 4 is a schematic structural view of a traveling wave electromagnetic stirring hollow outer shell, a traveling wave electromagnetic stirring hollow inner shell, a third water-cooling inlet, a fourth water-cooling outlet, a plurality of square magnets and the like of the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process of the present invention;
fig. 5 is a schematic structural view of a spiral electromagnetic stirring hollow outer shell, a spiral electromagnetic stirring hollow inner shell, a fifth water cooling inlet, a sixth water cooling outlet, a plurality of spiral magnets and the like of the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process of the utility model;
FIG. 6 is a schematic view of the top view of the spiral electromagnetic stirring hollow inner shell and a plurality of spiral magnets of the melt processing device in the continuous casting process of hypereutectic aluminum-silicon alloy of the present invention;
FIG. 7 is a schematic structural view of another embodiment of a melt processing apparatus for a continuous casting process of hypereutectic aluminum-silicon alloy according to the present invention;
fig. 8 and 9 are schematic structural views of another embodiment of the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process according to the present invention.
Detailed Description
The invention will be further elucidated with reference to the drawings and the specific embodiments.
Examples
The melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process shown in fig. 1, 2, 3, 4, 5 and 6 comprises a molten pool assembly and an electromagnetic stirring assembly matched with the molten pool assembly, wherein the molten pool assembly comprises an outer shell 1, a molten pool 2 arranged in the outer shell 1, a rotary electromagnetic stirring hollow shell 3 arranged on the inner wall of the molten pool 2, a charged coil 4 arranged in the rotary electromagnetic stirring hollow shell 3, and a solution guide pipe 7 arranged at the bottom of the outer shell 1, the electromagnetic stirring assembly comprises a transition molten pool 8 connected with the guide pipe 7, a plurality of L-shaped solution delivery pipes 9 arranged at the bottom of the transition molten pool 8, a rotary electromagnetic stirring hollow outer shell 10 respectively arranged on a plurality of L-shaped solution delivery pipes 9, a rotary electromagnetic stirring hollow inner shell 11 arranged in the rotary electromagnetic stirring hollow outer shell 10, a first water-cooling inlet 13, a second water-cooling outlet 14, a plurality of electromagnetic stirring hollow inner shells 12 arranged in the rotary electromagnetic stirring hollow shell 11, a plurality of electromagnetic stirring hollow inner shells 12 arranged on the rotary electromagnetic stirring hollow stirring inner shell 10, a plurality of electromagnetic stirring hollow stirring inner shells 20 arranged on an electromagnetic stirring spiral water-cooling inlet, a plurality of electromagnetic stirring hollow stirring inner shell 20, a plurality of electromagnetic stirring hollow stirring pipes 10, a plurality of electromagnetic stirring hollow stirring pipes 10, a plurality of electromagnetic stirring hollow stirring electromagnetic stirring hollow stirring pipe 10, a plurality of electromagnetic stirring hollow stirring electromagnetic shell 20, a plurality of electromagnetic stirring hollow stirring electromagnetic.
Further preferably, the solution conduit 7 has a length dimension of 5cm to 8 cm; and the number of the plurality of the square-shaped magnets 17 is four or six; and four or six helical magnets 22 are provided; the device for treating the melt in the hypereutectic aluminum-silicon alloy continuous casting process further comprises a powder spraying pipe 5 which is arranged in the molten pool 2 and is matched with the solution in the molten pool 2 for use, and a guide pipe 6 for protecting argon gas.
In the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process shown in fig. 7, the L-shaped solution delivery pipe 9, the traveling wave electromagnetic stirring hollow outer shell 15, the traveling wave electromagnetic stirring hollow inner shell 16, the third water-cooling inlet 18, the fourth water-cooling outlet 19, the plurality of square magnets 17 and the plurality of helical magnets 22 are of an integral structure, so that the assembly and the maintenance are convenient.
The melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process as shown in fig. 8 and 9 further comprises a positioning seat 25 arranged at the top end of the housing 1, a vertical external thread adjusting rod 26 arranged on one surface of the positioning seat 25, a transverse ultrasonic detection probe mounting plate 27 fixed on the vertical external thread adjusting rod 26 through a group of locking nuts 28, and an ultrasonic detection probe 29 arranged in one end of the transverse ultrasonic detection probe mounting plate 27, wherein the ultrasonic detection probe 29 is connected with an ultrasonic detector and used for detecting the particle size of silicon powder added into the aluminum alloy solution, so that quick, accurate and stable detection (particle size is detected through wavelength) is realized, the aluminum alloy solution does not need to be taken out for independent detection, and the cost is low (traditional spectral detection and high cost).
The A390 aluminum alloy blank prepared by the device has the silicon content of 17.2 percent, the modifier is powdery aluminum-phosphorus modifier, the phosphorus content is 4.5 percent, before pouring, the powder spraying device and the modifier are preheated to 300 ℃ (the powder spraying device and the modifier are not marked in figure 1), when preparing, the A390 aluminum alloy melt with the temperature of 820 ℃ is guided into a hot top, the melt flows to crystallization through a gap channel for continuous casting, after the continuous casting process is stable, the powder spraying device (not marked in figure 1 of the powder spraying device) is started, the pressure of blown nitrogen is 0.05Mpa, the flow of nitrogen is 0.1L/min, the quantity of the powdery modifier is 150g/min, the nominal input power of an electromagnetic stirrer is 1.2kw, the stirring frequency is 40Hz, the adopted technological parameters after stabilization are that the melt temperature in the gap channel is 740 ℃ and 780 ℃, 390 mm/min and 390-fine continuous casting with uniform components is obtained.
The melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process has the advantages that the melt processing device is integrally and continuously cast, L type continuous casting technology is adopted, melting and solidifying equipment is fixed on a vertical surface, and finally, a product is put on a horizontal surface, so that the production efficiency is improved.
According to the melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process, metal liquid is stirred and melted from the topmost one ton of molten pool, then enters a cuboid transition molten pool (a pre-cast heat preservation pool with relatively stable liquid flow if a large molten pool in the market directly falls down, the large molten pool per se is stirred and the flow field is disordered) through a 5cm channel of a solution guide pipe below, is added with silicon powder protected by argon gas and is fully and uniformly stirred, then a plurality of L-shaped solution conveying pipes (4 small channels, the production efficiency is improved, 1 to 4 production can be dragged and the like) are separated from the cuboid transition molten pool, and finally enters a water-cooling solidification and electromagnetic stirring assembly for electromagnetic stirring;
firstly, electromagnetically rotating and stirring, (the purpose is to throw off dendritic crystals on a chilling layer in a rotating and stirring mode, and the dendritic crystals are thrown off by rotating an electromagnetic stirring hollow outer shell, a rotating electromagnetic stirring hollow inner shell, a first water-cooling inlet, a second water-cooling outlet and an auxiliary live coil), when the metal liquid on the upper surface passes through a lower water-cooling ring, chilling is carried out, dendritic crystals are produced along with chilling, and the dendritic crystals on the chilling layer are thrown off in a rotating and stirring mode;
secondly, the principle explanation of the traveling wave electromagnetic stirring (realized by a traveling wave electromagnetic stirring hollow outer shell, a traveling wave electromagnetic stirring hollow inner shell, a third water-cooling inlet, a fourth water-cooling outlet and a plurality of square-shaped magnets) is as follows: when the thrown-out crushed dendritic crystal stirred by the first electromagnet passes through the channel, in order to ensure that the thrown-out dendritic crystal can be uniformly distributed in the channel of the molten pool, a driving force is added to homogenize crushed crystal generated by the cylindrical water-cooled wall in the whole molten pool, a horizontal circular traveling wave electromagnetic field is added in a second water-cooled ring, and the crushed crystal of the circumferential surface is diffused in the middle of the traveling wave through the thrust of the traveling wave;
thirdly, spiral electromagnetic stirring (realized by a spiral electromagnetic stirring hollow outer shell, a spiral electromagnetic stirring hollow inner shell, a fifth water cooling inlet, a sixth water cooling outlet and a plurality of spiral magnets), after the broken crystals and the fine crystals are uniformly diffused, large grains of the particles need to be discharged, an upward spiral electromagnetic stirring is applied, a vertical positive rotational wave is applied, after the wave energy reaches the upper suspension propelling force of the particles, the particles can automatically and upwardly get rid of a to-be-solidified interface, and therefore the purpose of finally optimizing the organization is achieved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (6)
1. A melt processing device in the hypereutectic aluminum-silicon alloy continuous casting process is characterized by comprising a molten pool component and an electromagnetic stirring component matched with the molten pool component for use, wherein the molten pool component comprises an outer shell (1), a molten pool (2) arranged in the outer shell (1), a rotary electromagnetic stirring hollow shell (3) arranged on the inner wall of the molten pool (2), a charged coil (4) arranged in the rotary electromagnetic stirring hollow shell (3) and a solution guide pipe (7) arranged at the bottom of the outer shell (1), the electromagnetic stirring component comprises a transition molten pool (8) connected with the guide pipe (7), a plurality of solution conveying pipes (9) arranged at the bottom of the transition molten pool (8), a rotary electromagnetic stirring hollow outer shell (10) respectively arranged on a plurality of solution conveying pipes (9) in the shape of L, a rotary electromagnetic stirring hollow inner shell (11) arranged in the rotary electromagnetic stirring hollow outer shell (10), a first water-cooling inlet (13) and a second water-cooling outlet (14) arranged on the rotary electromagnetic stirring hollow outer shell (10), a plurality of electromagnetic stirring hollow inner shell (10), a plurality of electromagnetic stirring hollow inner shell (10) arranged on the electromagnetic stirring hollow spiral shell (10), a plurality of electromagnetic stirring spiral water-cooling spiral stirring inner shell (10), a plurality of electromagnetic stirring hollow stirring inner shell (10), a plurality of electromagnetic stirring hollow stirring inner shell (16) arranged on an electromagnetic stirring inner shell (19) arranged on an electromagnetic stirring inner shell (10), and a plurality of electromagnetic stirring spiral electromagnetic.
2. The apparatus for treating a melt in a continuous casting process of a hypereutectic aluminum-silicon alloy according to claim 1, wherein: the length of the solution conduit (7) is 5 cm-8 cm.
3. The apparatus for treating a melt in a continuous casting process of a hypereutectic aluminum-silicon alloy according to claim 1, wherein: the number of the plurality of the square-shaped magnets (17) is four or six.
4. The apparatus for treating a melt in a continuous casting process of a hypereutectic aluminum-silicon alloy according to claim 1, wherein: the number of helical magnets (22) is four or six.
5. The apparatus for treating a melt in a continuous casting process of a hypereutectic aluminum-silicon alloy according to claim 1, wherein: the melt treatment device in the hypereutectic aluminum-silicon alloy continuous casting process further comprises a powder spraying pipe (5) which is arranged in the molten pool (2) and is matched with the solution in the molten pool (2) for use, and an argon protective guide pipe (6).
6. The apparatus for treating a melt in a continuous casting process of a hypereutectic aluminum-silicon alloy according to claim 5, wherein: the device for treating the melt in the hypereutectic aluminum-silicon alloy continuous casting process further comprises a positioning seat (25) arranged at the top end of the shell (1), a vertical external thread adjusting rod (26) arranged on one surface of the positioning seat (25), a transverse ultrasonic detection probe mounting plate (27) fixed on the vertical external thread adjusting rod (26) through a group of locking nuts (28), and an ultrasonic detection probe (29) arranged in one end of the transverse ultrasonic detection probe mounting plate (27), wherein the ultrasonic detection probe (29) is connected with an ultrasonic detector.
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| WO2023058766A1 (en) * | 2021-10-07 | 2023-04-13 | 学校法人千葉工業大学 | Hypereutectic material and method for manufacturing same |
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