CN117564235A - Casting and rolling device and method for aluminum alloy plate blank - Google Patents
Casting and rolling device and method for aluminum alloy plate blank Download PDFInfo
- Publication number
- CN117564235A CN117564235A CN202410053451.5A CN202410053451A CN117564235A CN 117564235 A CN117564235 A CN 117564235A CN 202410053451 A CN202410053451 A CN 202410053451A CN 117564235 A CN117564235 A CN 117564235A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- blocks
- casting
- roller
- mountain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 208
- 238000005096 rolling process Methods 0.000 title claims abstract description 88
- 238000005266 casting Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002425 crystallisation Methods 0.000 claims abstract description 116
- 230000008025 crystallization Effects 0.000 claims abstract description 116
- 238000009826 distribution Methods 0.000 claims abstract description 100
- 239000000498 cooling water Substances 0.000 claims abstract description 56
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 48
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims description 63
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 52
- 229910052802 copper Inorganic materials 0.000 claims description 52
- 239000010949 copper Substances 0.000 claims description 52
- 238000007670 refining Methods 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 1
- 238000011049 filling Methods 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 description 39
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 39
- 239000007788 liquid Substances 0.000 description 36
- 230000009471 action Effects 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 13
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
Abstract
The invention relates to a casting and rolling device and a casting and rolling method of an aluminum alloy plate blank. The device for casting and rolling the aluminum alloy plate blank comprises a casting device, wherein the casting device comprises a flow distribution device and an electromagnetic stirring device, the flow distribution device comprises a flow distribution disc body, a feeding hole, a plurality of mountain-shaped flow distribution blocks and a plurality of triangle-shaped flow distribution blocks, and the electromagnetic stirring device comprises a first electromagnetic induction coil, a second electromagnetic induction coil, a cooling water inlet and a cooling water outlet and an alternating current power supply; and a crystallization device. The device provided by the invention is combined with the flow dividing device and the electromagnetic stirring device, and the prepared aluminum alloy plate blank has the advantages of high forming rate, good filling effect and uniform structure.
Description
Technical Field
The invention relates to the technical field of aluminum alloy cast rolling production, in particular to a cast rolling device and method for aluminum alloy blanks, and more particularly relates to a cast rolling device and method for improving cast rolling fluidity and slab quality of aluminum alloy wide sheets in a narrow solidification zone.
Background
The existing 1xxx aluminum alloy and 8xxx aluminum alloy mainly use Fe and Si elements as strengthening elements due to low alloy element content, so that the solidification interval is narrow, and the temperature difference between solidus line and liquidus line is only 20-30 ℃. This causes the fluidity of the aluminum liquid to decrease as the width of the sheet increases when casting 1xxx series aluminum alloys and 8xxx series aluminum alloy sheets.
The existing casting nozzle structure device for producing cast-rolling plates is of a general structure, and the design of a diversion structure is simpler. For example, patent application publication CN 218798971U describes a nozzle structure for aluminum alloy casting production, however, in which the fluidity difference of different grades of metal is not considered, the influence of the width and thickness of the cast sheet is not considered, and the casting structure is simple, only a single row of a few split blocks with a small number is provided. The invention of the patent application focuses on the fact that in the casting and rolling process, the flow of the aluminum liquid can be regulated through the feed inlet, and the flow distribution design of the aluminum liquid after the aluminum liquid enters the casting nozzle body is weak, so that the aluminum liquid is not suitable for preparing the wide cast and rolled thin plate of the aluminum alloy with the narrow solidification zone.
The blanks produced by adopting the casting and rolling method at present mainly have the following problems: as the width of the plate is increased, the fluidity of the aluminum liquid is reduced, on one hand, the aluminum liquid at the edge of the cast-rolling plate is difficult to feed and is not completely filled, and the forming effect of the cast-rolling plate is affected; on the other hand, the temperature difference between the center and the edge of the cast-rolled plate in the whole width direction is larger, so that the problems of element segregation and unequal grain sizes of the plate are generated, the plate structure is uneven, and the mechanical property of the plate is reduced.
Disclosure of Invention
The invention aims to provide a casting and rolling device and method for aluminum alloy plate blanks, which are used for solving the technical problems of low plate forming rate, unequal grain size, uneven structure and the like of casting and rolling by a known device in the prior art.
In order to achieve the above object, according to one aspect of the present disclosure, there is provided an apparatus for casting-rolling an aluminum alloy sheet billet, the apparatus comprising:
the casting device comprises a shunt device and an electromagnetic stirring device,
wherein the shunt device includes: a diverter tray body, a feed inlet arranged at the center of a side face perpendicular to a casting-rolling direction of the diverter tray body, a plurality of mountain-shaped diverter blocks arranged in the diverter tray body and linearly arranged at one side close to the feed inlet, a mountain tip of the plurality of mountain-shaped diverter blocks facing the casting-rolling direction and a ratio of a vertical length to a lateral length of the mountain-shaped diverter blocks being 0.7-0.8, a spacing between adjacent two of the plurality of mountain-shaped diverter blocks increasing from the center to both ends and satisfying 1.3.ltoreq maximum spacing/minimum spacing.ltoreq 2.0, and a plurality of triangle-shaped diverter blocks interposed in a gap of the plurality of mountain-shaped diverter blocks and alternately arranged with the plurality of mountain-shaped diverter blocks, the plurality of triangle-shaped diverter blocks and the plurality of mountain-shaped diverter blocks being at the same height of the diverter tray body, and a volume of the triangle-shaped diverter blocks being small, wherein a width ratio of the mountain-shaped diverter blocks to the triangle-shaped diverter blocks in the direction perpendicular to the casting-rolling direction being 2:1, a height ratio of the mountain-shaped diverter blocks being 2.2:1, and a height ratio of the triangle-shaped diverter blocks being alternately arranged with the plurality of the triangle-shaped diverter blocks being alternately arranged at the same height as the plurality of the mountain-shaped diverter blocks
The electromagnetic stirring device comprises: the first electromagnetic induction coil and the second electromagnetic induction coil are respectively arranged at two sides of the split-flow disc body in the casting-rolling direction and are formed by winding hollow copper tubes, the wall thickness of each copper tube is 0.3-0.6 mm, the winding diameter is 100-160 mm, the centers of the first electromagnetic induction coil and the second electromagnetic induction coil are positioned at the same height with the center of the split-flow disc body, the lengths of the first electromagnetic induction coil and the second electromagnetic induction coil in the casting-rolling direction are equal to the length of the split-flow disc body in the casting-rolling direction, and a cooling water inlet and outlet are arranged on the first electromagnetic induction coil and the second electromagnetic induction coil and are used for introducing cooling water into the copper tubes and an alternating current power supply; and
the crystallization device comprises an upper crystallization roller and a lower crystallization roller, and a cooling water passage is arranged in the upper crystallization roller and the lower crystallization roller.
Further, the crystallization device also comprises an air cooling device which is positioned at the downstream of the upper crystallization roller and the lower crystallization roller in the casting and rolling direction and is used for air cooling the aluminum alloy plate blank.
Further, the upper and lower crystallization rolls are made of copper.
Further, the overall outlines of the plurality of mountain-shaped flow dividing blocks and the plurality of triangle-shaped flow dividing blocks are in smooth transition.
Further, the angles of the apex angles of the plurality of triangular splitter blocks facing the casting direction are greater than the angles of the other angles.
According to another aspect of the present disclosure, there is provided a method for casting-rolling an aluminum alloy sheet billet using the apparatus of the present invention, the method comprising the steps of: step S1, refining, slag skimming, stirring and standing an aluminum alloy melt, and then feeding the aluminum alloy melt into a split-flow disc body through a feed inlet, so that the aluminum alloy melt flows through a plurality of mountain-shaped split-flow blocks and a plurality of triangle-shaped split-flow blocks; step S2, cooling water is introduced into copper tubes of the first electromagnetic induction coil and the second electromagnetic induction coil, and alternating current is applied through an alternating current power supply; and step S3, cooling water is introduced into the passages of the upper crystallization roller and the lower crystallization roller, so that the aluminum alloy melt flowing through the plurality of mountain-shaped flow dividing blocks and the plurality of triangle-shaped flow dividing blocks is converged into the area between the upper crystallization roller and the lower crystallization roller, and cooling and rolling forces are applied to the aluminum alloy melt through the upper crystallization roller and the lower crystallization roller, so that an aluminum alloy plate blank is obtained.
Further, the method also comprises a step S4 of air-cooling the aluminum alloy plate blank by using compressed air with the humidity of 40-60% through an air-cooling device to obtain a finished aluminum alloy plate.
Further, in step S1, the temperature of the aluminum alloy melt at the feed port is 680-720 ℃, and the flow rate of the aluminum alloy melt is 20-50 m/min.
Further, in step S2, the voltage applied to the copper coil is 220-380V, the frequency of the current applied to the copper coil is 2-50 Hz, and the flow rate of the cooling water in the copper coil is 0.5-2 m 3 /h。
Further, in step S3, the roll speeds of the upper and lower crystallization rolls are 1.0-3.0 m/min, and the flow rate of the roll cooling water is 3-10 m 3 And/h, the roughness Ra of the roller is 0.3-0.5 mu m, the convexity of the roller is 0.15-0.20 mm, the rolling force is 22-25 MPa, the length of the region of the roller is 50-55 mm, and the temperature of the aluminum alloy plate blank leaving the upper crystallization roller and the lower crystallization roller is 450-510 ℃.
As described above, the known casting and rolling apparatus and method of aluminum alloy sheet billet have technical problems of low sheet forming rate, unequal grain size, uneven structure, and the like. According to the technical scheme of the disclosure, a casting and rolling device for aluminum alloy plate blanks is provided, and the structural layout of a flow distribution device and an electromagnetic stirring device is combined to increase the flow distribution disc to be perpendicular to the casting and rolling directionThe fluidity of the aluminum liquid at the two ends in the direction of (a) ensures that the liquid flow distribution is uniform and the filling effect is improved, thereby obviously improving the forming rate of the aluminum alloy plate and being capable of being improved from the existing 95-96% to 98-99%; by the specific arrangement of the flow dividing blocks in the flow dividing device, the temperature difference between the center and the two ends of the flow dividing disc is reduced, and the temperature can be reduced to 3-5 ℃ from the existing 10-12 ℃, so that the phenomena of coarse grains at the center of the cast-rolling plate and fine grains at the two ends are improved; prevent coarse compounds (for example, al) from being generated due to the too low temperature of the aluminum liquid at the two ends of the flow distribution disc 9 Fe 2 Si 2 Phase), thereby improving the tissue uniformity of the cast-rolled plate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a perspective view of a wide sheet casting and rolling apparatus according to an embodiment of the present invention.
Fig. 2 is a front view of a wide sheet casting apparatus according to an embodiment of the present invention.
Fig. 3 is a front view of the wide sheet casting apparatus according to comparative example 1.
Fig. 4 is a front view of the wide sheet casting apparatus according to comparative example 2.
Fig. 5 is a front view of the wide sheet casting apparatus according to comparative example 3.
Fig. 6 is a flow field distribution diagram of aluminum liquid according to the casting process of comparative example 3.
Fig. 7 is a flow field distribution diagram of aluminum liquid in a casting process according to example 1 of the present invention.
Wherein the above figures include the following reference numerals:
1: a diverter tray body; 2: a feed inlet; 3: the mountain-shaped flow dividing block; 4: triangular shunt blocks; 5: a first electromagnetic induction coil; 6: a second electromagnetic induction coil; 7: a crystallization roller is arranged; 8: a lower crystallization roller; 9: aluminum alloy plate blank.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present disclosure will be described in detail with reference to examples.
In view of the deficiencies of the prior art mentioned in the background, one embodiment of the present disclosure provides an apparatus for cast rolling an aluminum alloy sheet billet, the apparatus comprising:
the casting device comprises a shunt device and an electromagnetic stirring device,
wherein the shunt device includes: a diverter tray body 1, a feed inlet 2, a plurality of mountain-shaped diverter blocks 3 arranged at the center of the side face of the diverter tray body 1 perpendicular to the casting direction, a plurality of mountain-shaped diverter blocks 3 arranged in the diverter tray body 1 and linearly arranged at the side close to the feed inlet 2, the mountain tips of the plurality of mountain-shaped diverter blocks 3 facing the casting direction and the ratio of the vertical length/the lateral length of the mountain-shaped diverter blocks being 0.7-0.8, the spacing between adjacent two of the plurality of mountain-shaped diverter blocks 3 increasing from the center to both ends and satisfying 1.3.ltoreq.maximum spacing/minimum spacing.ltoreq.2.0, and a plurality of triangle-shaped diverter blocks 4 interposed in the gaps of the plurality of mountain-shaped diverter blocks 3 and alternately arranged with the plurality of mountain-shaped diverter blocks 3, the plurality of triangle-shaped diverter blocks 4 being at the same height of the diverter tray body 1 and the plurality of mountain-shaped diverter blocks 3 being smaller in volume than the triangle-shaped diverter blocks 3, wherein the width ratio of the mountain-shaped diverter blocks 3 to the triangle-shaped diverter blocks 4 in the direction perpendicular to the casting direction being 2.3:1, and the ratio of the triangle-shaped diverter blocks 4 being 2:2.1
The electromagnetic stirring device comprises: the first electromagnetic induction coil 5 and the second electromagnetic induction coil 6 are respectively arranged at two sides of the split-flow disc body 1 in the casting-rolling direction and are formed by winding hollow copper tubes, the wall thickness of each copper tube is 0.3-0.6 mm, the winding diameter is 100-160 mm, the centers of the first electromagnetic induction coil 5 and the second electromagnetic induction coil 6 and the center of the split-flow disc body 1 are positioned at the same height, the lengths of the first electromagnetic induction coil 5 and the second electromagnetic induction coil 6 in the casting-rolling direction are equal to the length of the split-flow disc body 1 in the casting-rolling direction, and a cooling water inlet and outlet are arranged on the first electromagnetic induction coil 5 and the second electromagnetic induction coil 6 and are used for introducing cooling water into the copper tubes and an alternating current power supply; and
the crystallization device comprises an upper crystallization roller 7 and a lower crystallization roller 8, wherein a cooling water passage is arranged in the upper crystallization roller 7 and the lower crystallization roller 8.
It has been found that as the width of a cast sheet increases during casting of an aluminum alloy material (e.g., 1 xxx-series and 8 xxx-series aluminum alloy materials having a narrow solidification zone), the fluidity of the aluminum liquid decreases, which results in difficult feeding and incomplete filling of the aluminum liquid at both ends of the cast sheet, and a large temperature difference between the center and both ends of the cast sheet in the width direction as a whole, and coarse compounds and uneven structures are generated at both ends of the sheet. The invention designs a casting and rolling device for a sheet casting and rolling process with a narrow solidification zone and a width of about two meters in the prior art, and simultaneously considers factors such as the width, thickness, solidus-liquidus temperature difference, precipitation rule of alloy elements and the like of the sheet.
The device for casting and rolling the aluminum alloy plate blank applies the electromagnetic induction principle, water-cooling copper coils are added on two sides of the flow distribution disc body (the casting nozzle body), and molten metal (aluminum alloy melt) is subjected to the stirring action of electromagnetic force and the heating action of joule heat in the flowing process, so that the fluidity of the molten metal on two sides of the flow distribution disc is increased, the temperature of the molten metal is increased, and the complete filling of liquid flow in the casting process is facilitated.
In addition, the shapes, the number, the spacing and the distribution positions of the distribution blocks arranged in the distribution plate body are designed on the basis of simulation, so that the distribution and the flow characteristics of molten metal in the distribution plate body are further improved. The mountain-shaped flow dividing blocks are large in volume and are arranged on one side close to the feed inlet in a linear and transverse mode, and accordingly the effect of primary distribution of aluminum liquid flow is achieved; the triangular flow dividing blocks are small in size, are arranged in gaps of the mountain-shaped flow dividing blocks in a penetrating mode, and are arranged at the same height with the mountain-shaped flow dividing blocks, so that the effect of uniformly distributing aluminum liquid again is achieved. Thereby the fluidity of the molten aluminum in the diverter tray body is improved.
Preferably, the spacing between adjacent two of the plurality of mountain-shaped splitter blocks 3 satisfies a maximum spacing/minimum spacing of 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0. The maximum spacing/minimum spacing is within the scope of the present disclosure, so that the flow resistance of the two ends of the aluminum liquid flowing in the diverter tray body is reduced, thereby promoting the flow of the aluminum liquid at the two ends, and further improving the mold filling integrity of the aluminum liquid.
In some examples, the crystallization apparatus further comprises an air cooling device located downstream of the upper crystallization roll 7 and the lower crystallization roll 8 in the casting direction for air-cooling the aluminum alloy sheet billet.
After the aluminum alloy plate blank is moved out of the rolling area along with the rotation of the roller, the aluminum alloy plate blank can be continuously subjected to air cooling by adopting an air cooling device, so that the shaping of the cast-rolled plate can be facilitated, and a stable finished aluminum alloy cast-rolled plate can be obtained.
In some examples, the upper and lower crystallization rolls 7, 8 are made of copper. The upper crystallization roller and the lower crystallization roller are made of copper, the copper has good heat conductivity, and the copper is combined with cooling water in the inner passages of the upper crystallization roller and the lower crystallization roller, so that good cooling effect can be realized in the roller process.
In some examples, the overall profile of the plurality of chevron shaped splitter blocks 3 and the plurality of triangular splitter blocks 4 is rounded. The overall outline of the mountain-shaped flow dividing block and the triangular flow dividing block is smoothly transited, so that the resistance to the aluminum liquid is reduced, the aluminum liquid is promoted to be uniformly distributed, and the plate is further beneficial to complete filling.
In some examples, the angle of the apex angle of the plurality of triangular diverter blocks 4 toward the casting direction is greater than the angle of the other angles. The angle of the triangular split blocks, which is larger than the other two angles, can further improve the fluidity of the aluminum liquid and the uniform distribution of the aluminum liquid in the direction perpendicular to the casting and rolling direction, thereby further improving the filling integrity of the plate.
According to another embodiment herein, there is provided a method for casting-rolling an aluminum alloy sheet billet using the apparatus of the present invention, the method comprising the steps of: step S1, refining, slag skimming, stirring and standing an aluminum alloy melt, and then feeding the aluminum alloy melt into a flow distribution disc body 1 through a feed inlet 2, so that the aluminum alloy melt flows through a plurality of mountain-shaped flow distribution blocks 3 and a plurality of triangular flow distribution blocks 4; step S2, cooling water is introduced into copper tubes of the first electromagnetic induction coil 5 and the second electromagnetic induction coil 6, and alternating current is applied through an alternating current power supply; and step S3, cooling water is introduced into the passages of the upper crystallization roller 7 and the lower crystallization roller 8, so that the aluminum alloy melt flowing through the plurality of the mountain-shaped flow dividing blocks 3 and the plurality of the triangle-shaped flow dividing blocks 4 is converged into the area between the upper crystallization roller 7 and the lower crystallization roller 8, and cooling and rolling forces are applied to the aluminum alloy melt through the upper crystallization roller 7 and the lower crystallization roller 8, so as to obtain an aluminum alloy plate blank.
The aluminum alloy melt enters the flow distribution disc body from the feed inlet after refining, slag skimming, stirring and standing, passes through the first row of the mountain-shaped flow distribution blocks, passes through the second row of the triangular flow distribution blocks, and flows and fills from the center to two sides. The first electromagnetic induction coil and the second electromagnetic induction coil are connected with cooling water and apply alternating current to generate an alternating magnetic field, aluminum alloy melt in the flow distribution disc body cuts magnetic force lines in the flowing process to generate Lorentz force and Joule heat, and due to the effect of electromagnetic force, the flowing speed and the temperature of the aluminum alloy melt close to the two ends of the flow distribution disc are improved, so that the temperature difference of the formed plate in the width direction is reduced. Cooling water is introduced into the upper crystallization roller and the lower crystallization roller, aluminum liquid flows through the mountain-shaped flow dividing blocks and the triangular flow dividing blocks and then is converged into a region between the upper crystallization roller and the lower crystallization roller, and the aluminum liquid is solidified and then rolled into an aluminum alloy plate blank through the cooling action of the upper crystallization roller and the lower crystallization roller and the action of the applied rolling force.
The upper crystallization roller and the lower crystallization roller are internally provided with a cooling water passage, and cooling water is introduced in the rolling process to cool the rollers; simultaneously, the upper crystallization roller and the lower crystallization roller apply rolling force to the aluminum liquid, solidification can be completed in an effective working area after the aluminum liquid is contacted with the rollers, a cast-rolled aluminum alloy plate blank is formed by cooling to below a solidus line, the plate blank is moved out of a rolling area along with rotation of the rollers, and then the plate blank is continuously cooled by cooling water mist, so that a stable aluminum alloy rolled plate is formed.
In some examples, the method further comprises a step S4 of air-cooling the aluminum alloy plate blank by an air-cooling device by using compressed air with the humidity of 40-60%, so as to obtain a finished aluminum alloy plate. Preferably, the humidity of the compressed air is 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, etc. The humidity of the compressed air provided by the air cooling device is within the scope of the disclosure, so that the shaping effect of the aluminum alloy plate blank can be improved, and the yield is improved.
In some examples, in step S1, the temperature of the aluminum alloy melt at the feed inlet 2 is 680-720 ℃, and the flow rate of the aluminum alloy melt is 20-50 m/min.
Preferably, the temperature of the aluminum alloy melt at the feed inlet is 680 ℃, 685 ℃, 690 ℃, 695 ℃, 700 ℃, 705 ℃, 710 ℃, 715 ℃, 720 ℃, etc. Preferably, the aluminum alloy melt flow rates are 20 m/min, 25 m/min, 30 m/min, 35 m/min, 40 m/min, 45 m/min, 50 m/min, and the like. The temperature and the flow rate of the aluminum alloy melt are within the scope of the disclosure, so that the fluidity of the aluminum alloy melt can be further improved, and the temperature difference of the aluminum liquid at the center and the two ends of the flow distribution disc is reduced, thereby further improving the mold filling integrity of the aluminum liquid.
In some examples, in step S2, the voltage applied to the copper coil is 220-380V, the current frequency applied to the copper coil is 2-50 Hz, and the flow rate of cooling water in the copper coil is 0.5-2 m 3 /h。
Preferably, the voltage applied to the copper coil is 220V, 380V, etc., the current frequency is 50 Hz, and the flow rate of the cooling water is 0.5 m 3 /h、1.0 m 3 /h、1.5 m 3 /h、2.0 m 3 /h, etc. The flow of cooling water is within the scope of the disclosure, and the copper coil can be effectively protected, so that the copper coil is prevented from overheating and short-circuiting. The voltage and the current frequency applied to the copper coil are within the range of the disclosure, and appropriate Lorentz force and Joule heat can be effectively generated, so that the flow speed and the temperature of the aluminum melt at the two ends of the flow distribution disc are further improved, the temperature difference of the aluminum alloy plate in the width direction is further reduced, and meanwhile, the filling effect is further improved.
In some examples, in step S3, the roll speeds of the upper crystallization roll 7 and the lower crystallization roll 8 are 1.0-3.0 m/min, and the flow rate of the roll cooling water is 3-10 m 3 And/h, the roughness Ra of the roller is 0.3-0.5 mu m, the convexity of the roller is 0.15-0.20 mm, and the roller is rolledThe force is 22-25 MPa, the length of the roller area is 50-55 mm, and the temperature of the aluminum alloy plate blank leaving the upper crystallization roller 7 and the lower crystallization roller 8 is 450-510 ℃.
Preferably, the roll speed is 1.0 m/min, 1.5 m/min, 2.0 m/min, 2.5 m/min, 3.0 m/min and the like, and the flow rate of the roll cooling water is 3 m 3 /h、4 m 3 /h、5 m 3 /h、6 m 3 /h、7 m 3 /h、8 m 3 /h、9 m 3 /h、10 m 3 And the like, the roughness Ra is 0.3 mu m, 0.4 mu m, 0.5 mu m and the like, the convexity of the roller is 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.20 mm and the like, the rolling force is 22 MPa, 23 MPa, 24 MPa, 25 MPa and the like, the length of the roller region is 50 mm, 51 mm, 52 mm, 53 mm, 54 mm and the like, and the temperature leaving the roller is 450 ℃, 460 ℃, 470 ℃, 480 ℃, 490 ℃, 500 ℃, 510 ℃ and the like. The technological parameters of the roller process are within the scope of the disclosure, so that the roller efficiency of the aluminum alloy plate can be improved, the yield can be increased, and the quality of the finished aluminum alloy plate can be improved.
The present application is described in further detail below in conjunction with specific embodiments, which should not be construed as limiting the scope of the claims.
Example 1
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt to a flow distribution disc body from a feed inlet at 680 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=1.3; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.7; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.3 mm, winding diameter is 100 mm) of the electromagnetic induction coil, and flow rate is 0.5 m 3 And/h, applying an alternating current with a voltage of 220V, generating an alternating magnetic field by the copper coil inductance, and dispersingApplying electromagnetic force to the aluminum alloy melt in the disk body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 50 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 2
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt to a flow distribution disc body from a feed inlet at 680 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased progressively, and the maximum interval/minimum interval=1.6; the tip of the chevron is oriented in the casting direction and the length of the vertical/lateral sections of the chevron = 0.7; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.3 mm, winding diameter is 100 mm) of the electromagnetic induction coil, and flow rate is 0.5 m 3 And/h, alternating current is applied, the voltage is 220V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 And/h, the roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 50 mm, and the aluminum alloy plate blank leaves the upper partThe temperature of the lower crystallization roller is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 3
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt to a flow distribution disc body from a feed inlet at 680 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=2.0; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.7; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.3 mm, winding diameter is 100 mm) of the electromagnetic induction coil, and flow rate is 0.5 m 3 And/h, alternating current is applied, the voltage is 220V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 50 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 4
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 720 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=1.3; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.8; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.4 mm, winding diameter is 120 mm) of the electromagnetic induction coil, and flow rate is 2 m 3 And/h, alternating current is applied, the voltage is 380V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 52 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 5
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 720 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased progressively, and the maximum interval/minimum interval=1.6; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.8; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.4 mm, winding diameter is 120 mm) of the electromagnetic induction coil, and flow rate is 2 m 3 And/h, alternating current is applied, the voltage is 380V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 52 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 6
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 720 ℃ and 20 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=2.0; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.8; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.4 mm, winding diameter is 120 mm) of the electromagnetic induction coil, and flow rate is 2 m 3 And/h, alternating current is applied, the voltage is 380V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is cooled by the upper and lower crystallization rollersThe aluminum alloy plate is solidified and rolled into an aluminum alloy plate blank after the solidification and the rolling, the roller speed is 1.0 m/min, and the flow of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 52 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 7
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at 680 ℃ and 25 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=1.3; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.75; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.5 mm, winding diameter is 140 mm) of the electromagnetic induction coil, and flow rate is 0.5 m 3 And/h, alternating current is applied, the voltage is 220V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 2.0 m/min, and the flow rate of roller cooling water is 6 m 3 The roughness Ra of the roller is 0.4 mu m, the convexity of the roller is 0.18 mm, the rolling force is 23 MPa, the length of the roller area is 55 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 8
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 700 ℃ and 25 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=2.0; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.75; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.5 and mm, winding diameter is 140 and mm) of the electromagnetic induction coil, and flow rate is 2 and 2 m 3 And/h, alternating current is applied, the voltage is 380V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 2.0 m/min, and the flow rate of roller cooling water is 6 m 3 The roughness Ra of the roller is 0.4 mu m, the convexity of the roller is 0.18 mm, the rolling force is 23 MPa, the length of the roller area is 55 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 510 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 9
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at 680 ℃ and 50 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=1.3; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.7; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.6 mm, winding diameter is 160 mm) of the electromagnetic induction coil, and flow rate is 0.5 m 3 And/h, alternating current is applied, the voltage is 220V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 3.0 m/min, and the flow rate of roller cooling water is 10 m 3 The roughness Ra of the roller is 0.5 mu m, the convexity of the roller is 0.20 mm, the rolling force is 25 MPa, the length of the roller area is 55 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Example 10
S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 700 ℃ and 50 m/min, passing through a first row of mountain-shaped flow distribution blocks, and then passing through a second row of triangular flow distribution blocks, and filling the whole flow distribution disc from the center to two sides; adjacent two of the mountain-shaped split blocks are arranged at unequal intervals, the intervals from the center to the two ends are increased gradually, and the maximum interval/minimum interval=2.0; the tips of the chevrons face the casting direction and the vertical length/lateral length of the chevron-shaped split block = 0.8; the width ratio of the mountain-shaped flow dividing block to the triangular flow dividing block is 2:1, and the height ratio is 2.2:1;
Step S2, cooling water is introduced into a copper pipe (wall thickness is 0.6 mm, winding diameter is 160 mm) of the electromagnetic induction coil, and flow rate is 2 m 3 And/h, alternating current is applied, the voltage is 380V, the copper coil inductance generates an alternating magnetic field, and electromagnetic force is applied to the aluminum alloy melt in the shunt disc body;
s3, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 3.0 m/min, and the flow rate of roller cooling water is 10 m 3 The roughness Ra of the roller is 0.5 mu m, the convexity of the roller is 0.20 mm, the rolling force is 25 MPa, the length of the roller area is 55 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 510 ℃;
and S4, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Comparative example 1
Step S1, refining, slag skimming, stirring and standing an 8xxx aluminum alloy melt, then feeding the aluminum alloy melt from a feed port to a diverter disc body at 680 ℃ and 20 m/min, and filling the whole diverter disc body from the center to two sides in a flowing manner through a mountain-shaped diverter block, wherein the tip of the mountain-shaped diverter block faces the casting and rolling direction, the vertical part length/the transverse part length of the mountain-shaped diverter block=0.7, and the adjacent two of the mountain-shaped diverter blocks are arranged at equal intervals;
S2, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 1.0 m/min, and the flow rate of roller cooling water is 3 m 3 The roughness Ra of the roller is 0.3 mu m, the convexity of the roller is 0.15 mm, the rolling force is 22 MPa, the length of the roller area is 57 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S3, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Comparative example 2
Step S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed port to a flow distribution disc body at 680 ℃ and 25 m/min, and filling the whole flow distribution disc body from the center to two sides by uniformly spaced arrangement of adjacent two of the flow distribution blocks through a convex-shaped flow distribution block with a cone top, wherein the vertical part length/the transverse part length of the flow distribution block is=0.7;
s2, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 2.0 m/min, and the flow rate of roller cooling water is 6 m 3 The roughness Ra of the roller is 0.4 mu m, the convexity of the roller is 0.18 mm, the rolling force is 23 MPa, the length of the roller area is 57 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 450 ℃;
and S3, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Comparative example 3
Step S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at a speed of 700 ℃ and 50 m/min, passing through a first row of convex flow distribution blocks with cone tops (the vertical part length/the transverse part length of the flow distribution blocks=0.8), and then passing through a second row of triangular flow distribution blocks, wherein two adjacent flow distribution blocks are arranged at equal intervals, and filling the whole flow distribution disc body from the center to two sides;
s2, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 3.0 m/min, and the flow rate of roller cooling water is 10 m 3 The roughness Ra of the roller is 0.5 mu m, the convexity of the roller is 0.2 mm, the rolling force is 25 MPa, the length of the roller area is 60 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 510 ℃;
And S3, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
Comparative example 4
Step S1, refining, slag skimming, stirring and standing an 8xxx series aluminum alloy melt, then feeding the aluminum alloy melt from a feed inlet to a flow distribution disc body at the speed of 710 ℃ and 60 m/min, passing through a first row of convex flow distribution blocks with cone tops (the vertical part length/the transverse part length of the flow distribution blocks=0.8), and then passing through a second row of triangular flow distribution blocks, wherein two adjacent flow distribution blocks are arranged at equal intervals, and filling the whole flow distribution disc body from the center to two sides;
s2, after the aluminum alloy melt flows into the upper and lower crystallization roller areas, the aluminum alloy melt is subjected to cooling and rolling actions of the upper and lower crystallization rollers, is solidified and then rolled into an aluminum alloy plate blank, the roller speed is 4.0 m/min, and the flow rate of roller cooling water is 15 m 3 The roughness Ra of the roller is 0.6 mu m, the convexity of the roller is 0.3 mm, the rolling force is 20 MPa, the length of the roller area is 63 mm, and the temperature of the aluminum alloy plate blank leaving the upper and lower crystallization rollers is 550 ℃;
and S3, air-cooling the aluminum alloy plate after the roller is removed by using compressed air with the humidity of 40-60% through an air cooling device, so as to obtain the finished cast-rolled aluminum alloy plate.
The process parameters for the preparation of aluminium alloy sheets according to examples 1-10 of the present invention and comparative examples 1-4 are shown in table 1 below.
TABLE 1
Performance data for 1900 mm wide 6.8 mm thick aluminum alloy sheets prepared according to examples 1-10 and comparative examples 1-4 of the present invention are shown in table 2 below.
TABLE 2
From the above results, it can be seen that examples 1 to 10, which incorporate the shunt device and the electromagnetic stirring device of the present invention in a specific arrangement, are capable of casting to obtain a desired finished cast aluminum alloy sheet, during the casting processIn the method, the fluidity of the two end parts of the flow distribution disc is good, the aluminum liquid distribution is uniform, the filling effect is good, the forming rate of the cast-rolling plate is high, the temperature difference between the center and the two end parts in the width direction of the cast-rolling plate is small, and coarse compounds do not exist at the end parts of the cast-rolling plate. In contrast, the cast-rolled plates obtained in comparative examples 1 to 4, which did not employ the shunt device and the electromagnetic stirring device of the present invention, were significantly worse, and in the casting process, the fluidity of both end portions of the shunt plate was poor, the distribution of the aluminum liquid was uneven, the charging effect was poor, the cast-rolled plate forming rate was low, the temperature difference between the center and both end portions in the width direction of the cast-rolled plate was large, and coarse compound Al appeared at the end portions of the cast-rolled plate 9 Fe 2 Si 2 And (3) phase (C).
Fig. 6 shows a casting process flow field distribution diagram according to comparative example 3, and fig. 7 shows a casting process flow field distribution diagram according to example 1. It can be seen from fig. 6 and 7 that the difference in the distribution of the aluminum flows of the two casting devices is remarkable, and the aluminum flows at both ends of the split plate in comparative example 3 are small, whereas the aluminum flows at both ends of the split plate in example 1 are full. The casting device has the advantages that after the electromagnetic induction coil is combined, when the casting device is used for casting, aluminum liquid can be uniformly distributed in the flow distribution disc, the aluminum liquid flow quantity at the two ends is large, the filling effect is good, and the temperature difference between the aluminum liquid at the two ends and the aluminum liquid at the central position is obviously reduced.
The above embodiments are merely descriptions of technical solutions of the present disclosure, and are not intended to limit the scope thereof. While various modifications can be made by one of ordinary skill in the art with reference to the above examples, it should be within the scope of the present disclosure without departing from the spirit of the design of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those described herein.
The foregoing description relates to specific embodiments of the present disclosure, and is not intended to limit the disclosure to the particular embodiments described, but rather to limit the disclosure to the wide variety of modifications and changes that may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. An apparatus for casting aluminum alloy sheet stock, the apparatus comprising:
The casting device comprises a flow dividing device and an electromagnetic stirring device,
wherein the shunt device comprises:
a diverter tray body (1),
a feed inlet (2) arranged at the center of the side surface of the diverter tray body (1) perpendicular to the casting and rolling direction,
a plurality of mountain-shaped split blocks (3) arranged in the split disc body (1) and linearly arranged on a side close to the feed inlet (2), the mountain tips of the plurality of mountain-shaped split blocks (3) facing the casting and rolling direction and having a ratio of vertical length/lateral length of 0.7-0.8, a spacing between adjacent two of the plurality of mountain-shaped split blocks (3) increasing from the center to both ends and satisfying 1.3.ltoreq.maximum spacing/minimum spacing.ltoreq.2.0, and
a plurality of triangular shunt blocks (4) which are arranged in gaps of the plurality of mountain-shaped shunt blocks (3) in a penetrating way and are alternately distributed with the plurality of mountain-shaped shunt blocks (3), the plurality of triangular shunt blocks (4) and the plurality of mountain-shaped shunt blocks (3) are positioned at the same height of the shunt disc body (1), the volume of the triangular shunt blocks (4) is smaller than the volume of the mountain-shaped shunt blocks (3),
Wherein the width ratio of the mountain-shaped flow dividing block (3) to the triangular flow dividing block (4) in the direction perpendicular to the casting-rolling direction is 2:1, the height ratio of the mountain-shaped flow dividing block (3) to the triangular flow dividing block (4) is 2.2:1, and
the electromagnetic stirring device comprises:
the first electromagnetic induction coil (5) and the second electromagnetic induction coil (6) are respectively arranged at two sides of the flow distribution disc body (1) in the casting and rolling direction and are formed by winding hollow copper tubes, the wall thickness of each copper tube is 0.3-0.6 mm, the winding diameter is 100-160 mm, the centers of the first electromagnetic induction coil (5) and the second electromagnetic induction coil (6) and the center of the flow distribution disc body (1) are positioned at the same height, the lengths of the first electromagnetic induction coil (5) and the second electromagnetic induction coil (6) in the casting and rolling direction are equal to the length of the flow distribution disc body (1) in the casting and rolling direction,
a cooling water inlet and outlet arranged on the first electromagnetic induction coil (5) and the second electromagnetic induction coil (6) for introducing cooling water into the copper pipe, and
an alternating current power supply; and
the crystallization device comprises an upper crystallization roller (7) and a lower crystallization roller (8), wherein a cooling water passage is arranged inside the upper crystallization roller (7) and the lower crystallization roller (8).
2. The apparatus according to claim 1, wherein said crystallization apparatus further comprises an air cooling means located downstream of said upper crystallization roll (7) and lower crystallization roll (8) in said casting direction for air-cooling said aluminum alloy sheet billet.
3. The apparatus according to claim 2, characterized in that the upper crystallization roll (7) and the lower crystallization roll (8) are made of copper.
4. A device according to any one of claims 1-3, characterized in that the overall profile of the plurality of mountain-shaped splitter blocks (3) and the plurality of triangle-shaped splitter blocks (4) is rounded.
5. A device according to any one of claims 1-3, characterized in that the angle of the apex angle of the plurality of triangular diverter blocks (4) towards the casting direction is larger than the angle of the other angles.
6. A method of casting aluminum alloy sheet billet using the apparatus of any one of claims 1 to 5, characterized by comprising the steps of:
step S1, refining, slag skimming, stirring and resting an aluminum alloy melt, and then feeding the aluminum alloy melt into a flow distribution disc body (1) through a feed inlet (2), so that the aluminum alloy melt flows through a plurality of mountain-shaped flow distribution blocks (3) and a plurality of triangle-shaped flow distribution blocks (4);
S2, cooling water is introduced into copper tubes of the first electromagnetic induction coil (5) and the second electromagnetic induction coil (6) and alternating current is applied through an alternating current power supply; and
and S3, introducing cooling water into passages of an upper crystallization roller (7) and a lower crystallization roller (8), enabling the aluminum alloy melt flowing through the plurality of mountain-shaped flow dividing blocks (3) and the plurality of triangle-shaped flow dividing blocks (4) to be converged into a region between the upper crystallization roller (7) and the lower crystallization roller (8), and applying cooling and rolling force to the aluminum alloy melt through the upper crystallization roller (7) and the lower crystallization roller (8) to obtain the aluminum alloy plate blank.
7. The method according to claim 6, further comprising step S4 of air-cooling the aluminum alloy sheet blank with compressed air having a humidity of 40-60% by means of an air-cooling device to obtain a finished aluminum alloy sheet.
8. The method according to claim 6 or 7, characterized in that in step S1 the temperature of the aluminium alloy melt at the feed opening (2) is 680-720 ℃ and the flow rate of the aluminium alloy melt is 20-50 m/min.
9. The method according to claim 6 or 7, wherein in said step S2, the voltage applied to the copper coil is 220-380V, the frequency of the current applied to the copper coil is 2-50 Hz, and the flow rate of the cooling water in the copper coil is 0.5-2 m 3 /h。
10. The method according to claim 6 or 7, characterized in that in the step S3, the roll speed of the upper crystallization roll (7) and the lower crystallization roll (8) is 1.0-3.0 m/min, and the flow rate of the roll cooling water is 3-10 m 3 And/h, the roughness Ra of the rolls is 0.3-0.5 mu m, the convexity of the rolls is 0.15-0.20 mm, the rolling force is 22-25 MPa, the length of the area of the rolls is 50-55 mm, and the temperature of the aluminum alloy plate blank leaving the upper crystallization roll (7) and the lower crystallization roll (8) is 450-510 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410053451.5A CN117564235B (en) | 2024-01-15 | 2024-01-15 | Casting and rolling device and method for aluminum alloy plate blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410053451.5A CN117564235B (en) | 2024-01-15 | 2024-01-15 | Casting and rolling device and method for aluminum alloy plate blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117564235A true CN117564235A (en) | 2024-02-20 |
| CN117564235B CN117564235B (en) | 2024-04-09 |
Family
ID=89864686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410053451.5A Active CN117564235B (en) | 2024-01-15 | 2024-01-15 | Casting and rolling device and method for aluminum alloy plate blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117564235B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2401145A1 (en) * | 1973-04-18 | 1974-10-31 | Nippon Steel Corp | METHOD AND DEVICE FOR CONTINUOUS CASTING |
| WO1995020444A1 (en) * | 1994-01-28 | 1995-08-03 | Mannesmann Ag | Continuous casting facility and process for producing rectangular thin slabs |
| JPH0839219A (en) * | 1994-01-19 | 1996-02-13 | Katsuhiko Yamada | Method for continuously casting steel and continuous casting and rolling method |
| CN1225297A (en) * | 1998-06-30 | 1999-08-11 | 中南工业大学 | Tech. and electromagnetic equipment for casting and rolling aluminium belt |
| CN1994600A (en) * | 2006-12-27 | 2007-07-11 | 东北大学 | Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band |
| CN105436204A (en) * | 2016-01-10 | 2016-03-30 | 东北大学 | Rolling device and method for high silicon steel |
| CN108637200A (en) * | 2018-04-03 | 2018-10-12 | 东北大学 | The long flat bloom semi-continuous casting device of big specification magnesium alloy |
| CN108838207A (en) * | 2018-07-09 | 2018-11-20 | 秋海滨 | Metal casting method for tandem rolling and equipment |
-
2024
- 2024-01-15 CN CN202410053451.5A patent/CN117564235B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2401145A1 (en) * | 1973-04-18 | 1974-10-31 | Nippon Steel Corp | METHOD AND DEVICE FOR CONTINUOUS CASTING |
| JPH0839219A (en) * | 1994-01-19 | 1996-02-13 | Katsuhiko Yamada | Method for continuously casting steel and continuous casting and rolling method |
| WO1995020444A1 (en) * | 1994-01-28 | 1995-08-03 | Mannesmann Ag | Continuous casting facility and process for producing rectangular thin slabs |
| CN1225297A (en) * | 1998-06-30 | 1999-08-11 | 中南工业大学 | Tech. and electromagnetic equipment for casting and rolling aluminium belt |
| CN1994600A (en) * | 2006-12-27 | 2007-07-11 | 东北大学 | Cast rolling method and equipment of isometric crystal ferrite stainless steel slab band |
| CN105436204A (en) * | 2016-01-10 | 2016-03-30 | 东北大学 | Rolling device and method for high silicon steel |
| CN108637200A (en) * | 2018-04-03 | 2018-10-12 | 东北大学 | The long flat bloom semi-continuous casting device of big specification magnesium alloy |
| CN108838207A (en) * | 2018-07-09 | 2018-11-20 | 秋海滨 | Metal casting method for tandem rolling and equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117564235B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5634510A (en) | Integrated manufacturing system | |
| CN101602095B (en) | Oscillation casting and rolling device and method of electromagnetic field | |
| CN113134585A (en) | Homogenization square billet continuous casting production method under action of outfield cooperative control | |
| CN113118400B (en) | Homogenized slab continuous casting production method under outfield cooperative control action | |
| JP5712726B2 (en) | Continuous casting method and continuous casting slab | |
| JP2809186B2 (en) | Continuous casting method | |
| CN117564235B (en) | Casting and rolling device and method for aluminum alloy plate blank | |
| CN113231611B (en) | Method for determining technological parameters of continuous casting steel strip feeding by low-superheat isothermal eutectic method | |
| Miyazawa | Continuous casting of steels in Japan | |
| CN112272593B (en) | In-mold flow control device and in-mold flow control method in thin slab casting | |
| JPH038864B2 (en) | ||
| CN1350895A (en) | Method and apparatus for reducing heat radiation of continuous casting crystallizer | |
| JPH05239584A (en) | Rolled sheet of high strength aluminum alloy and its production | |
| JPS62254954A (en) | Control method for molten steel flow in mold of continuous casting | |
| DE2548939A1 (en) | PROCESS FOR MANUFACTURING METALLIC STRIP MATERIAL BY CASTING | |
| CN1083307C (en) | Beam formed from as-continuously cast beam blank | |
| JP5896067B1 (en) | Method for producing slabs using a continuous casting machine | |
| CN107716881A (en) | A kind of light-alloy magnetic ultrasound integrated casting and rolling device and method | |
| CN113695543A (en) | Method for controlling central shrinkage cavity of welding wire steel at high drawing speed | |
| JPH0362502B2 (en) | ||
| RU2712683C1 (en) | Crystallizer for continuous casting of workpiece | |
| CN115815541A (en) | Casting method and device for high-uniformity large-size aluminum alloy ingot | |
| CN216656268U (en) | Double-roller thin-strip continuous casting crystallizer | |
| RU2381086C1 (en) | Method of continuous casting of rectangular steel ingots | |
| CN209050079U (en) | The double roller continuous casting production system of composite board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |