CN116944472A - Equipment method for casting magnesium-aluminum bimetallic casting by using magnetic field-assisted lost foam - Google Patents
Equipment method for casting magnesium-aluminum bimetallic casting by using magnetic field-assisted lost foam Download PDFInfo
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- CN116944472A CN116944472A CN202310908175.1A CN202310908175A CN116944472A CN 116944472 A CN116944472 A CN 116944472A CN 202310908175 A CN202310908175 A CN 202310908175A CN 116944472 A CN116944472 A CN 116944472A
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- magnetic field
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- magnesium
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- 238000005266 casting Methods 0.000 title claims abstract description 71
- 239000006260 foam Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 35
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 244000035744 Hura crepitans Species 0.000 claims abstract description 44
- 239000007787 solid Substances 0.000 claims abstract description 41
- 239000004576 sand Substances 0.000 claims abstract description 22
- 238000010114 lost-foam casting Methods 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 12
- 230000008023 solidification Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000155 melt Substances 0.000 abstract description 7
- 238000003756 stirring Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 36
- 230000008569 process Effects 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 7
- 229910000861 Mg alloy Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910018134 Al-Mg Inorganic materials 0.000 description 3
- 229910018467 Al—Mg Inorganic materials 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- WABPQHHGFIMREM-AHCXROLUSA-N lead-203 Chemical compound [203Pb] WABPQHHGFIMREM-AHCXROLUSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 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
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C13/00—Moulding machines for making moulds or cores of particular shapes
- B22C13/08—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores
- B22C13/085—Moulding machines for making moulds or cores of particular shapes for shell moulds or shell cores by investing a lost pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The invention belongs to the technical field related to bimetal castings, and discloses equipment and a method for casting a magnesium-aluminum bimetal casting by using a magnetic field auxiliary lost foam, wherein the equipment comprises a sand box, a casting foam pattern, a solid inlay, a steady magnetic field coil, a rotating magnetic field coil and an alternating current power supply, dry sand is filled in the sand box, the casting foam pattern is arranged in the dry sand, the solid inlay is embedded in the casting foam pattern, and two opposite ends of the solid inlay are connected with the alternating current power supply; the steady magnetic field coil is sleeved outside the casting foam pattern, and the rotating magnetic field coil is sleeved on the periphery of the steady magnetic field coil. The rotating magnetic field coil can generate electromagnetic stirring effect in the melt, and the electromagnetic stirring can lead the melt to generate strong flow, promote migration and diffusion of high-melting-point precipitated phases in the melt, thereby improving the uniformity of solidification structures of the magnesium-aluminum bimetallic interface.
Description
Technical Field
The invention belongs to the technical field related to bimetal castings, and particularly relates to equipment and a method for casting a magnesium-aluminum bimetal casting by using a magnetic field-assisted lost foam.
Background
With the rapid development of modern industry, fields of automobiles, weaponry, aerospace and the like put forward higher and higher requirements on the light weight, structural integrity and comprehensive performance of materials, and the use of a single material is more and more difficult to meet the higher and higher requirements on the comprehensive performance of parts. The bimetal material is a novel composite material prepared by using a composite forming method to enable two different metals to be metallurgically bonded at an interface. The two metals in the bimetal material can keep the independence of the performances, and can realize the synchronous improvement of the strength, the toughness, the friction performance, the heat resistance and the like as a whole. At present, compared with single metal, the bimetal material has the characteristic of excellent complementary performance of different metals, can further improve the service performance of parts, and is applied to the fields of mechanical chemical industry, automobiles, ships, aerospace and the like.
The preparation method of the bimetal material mainly comprises rolling compounding, welding compounding, casting compounding and the like. The rolling composite can be used for rapidly preparing laminar or rod-shaped bimetallic blanks in large quantities. The bimetal prepared by the welding method has excellent rigidity and connection performance. Both of these methods, however, have difficulty in producing bimetallic parts having complex contours and large contact areas. And the casting combines the characteristic that the casting process is suitable for preparing the parts with complex shapes, so the method has more advantages in preparing the bimetal parts with complex shapes at low cost. However, solid-liquid composite casting techniques also present problems in preparing magnesium/aluminum bimetallic castings.
The existence of a dense oxide film on the surface of the solid inlay can obstruct the metallurgical bonding of the magnesium/aluminum bimetallic interface, and the continuous oxide film is easy to remain in the composite interface to form inclusion defects in the composite process. Meanwhile, because the heat input is larger in the composite casting process, the surface of the solid inlay is more molten, and a large amount of brittle and hard Al12Mg17 and Al3Mg2 intermetallic compounds which are continuously distributed at the interface can be generated in the composite process. At the same time, due to the cooling action of the inlay, the interface area forms a temperature gradient perpendicular to the surface of the solid inlay during solidification, so that coarse solidification structures are formed by the intermetallic compounds. These will have a very detrimental effect on the properties of the bimetallic material bonding interface. The existence of these problems greatly restricts the further development and application of the solid-liquid composite casting process.
Aiming at the problems that the magnesium/aluminum bimetallic interface is easy to generate oxide inclusion, the solidification structure is coarse, the bonding strength is low and the like in the solid-liquid composite casting process, related researches are also carried out. At present, when the structure performance of a magnesium/aluminum bimetal interface is regulated and controlled by an external physical field, mechanical vibration and ultrasonic vibration are mostly adopted. The mechanical vibration process is simpler and has lower cost, but can not directly act on the interface, and the improvement effect on the solidification structure is limited. Ultrasonic vibration can directly act on the bimetal interface, so that the regulation and control effect is good, but the matching design is needed between the solid inlay and the ultrasonic transducer, the process is complex, and the cost is high.
Disclosure of Invention
In order to meet the above defects or improvement demands of the prior art, the invention provides equipment and a method for casting a magnesium-aluminum bimetal casting by using a magnetic field assisted lost foam, and aims to provide equipment and a method for effectively and conveniently controlling the interface structure performance of the magnesium-aluminum bimetal at low cost.
In order to achieve the above object, according to one aspect of the present invention, there is provided an apparatus for casting a magnesium-aluminum bimetal casting by using a magnetic field-assisted lost foam, the apparatus comprising a flask, a casting foam pattern, a solid inlay, a steady magnetic field coil, a rotating magnetic field coil and an ac power supply, wherein the flask is filled with dry sand, the casting foam pattern is disposed in the dry sand, the solid inlay is embedded in the casting foam pattern, and opposite ends thereof are connected to the ac power supply; the steady magnetic field coil is sleeved outside the casting foam pattern, and the rotating magnetic field coil is sleeved on the periphery of the steady magnetic field coil.
Further, the device further comprises a pouring system foam pattern and a pouring cup, wherein the pouring system foam pattern is arranged in the dry sand and connected with the pouring cup.
Further, the apparatus further includes a three-dimensional vibrating table on which the sand box is disposed.
Further, the apparatus includes a vacuum tube connected to the flask for evacuating the flask.
Further, the apparatus includes a membrane for covering the opening of the flask.
Further, the height of the part of the solid inlay extending out of the casting foam pattern is 5 mm-20 mm.
The invention also provides a using method of the equipment for casting the magnesium-aluminum bimetal casting by the magnetic field auxiliary lost foam, which is characterized in that the vacuum pumping pipe is used for carrying out vacuum pumping treatment on the sand box, so that the vacuum degree in the sand box is 0.015 Mpa-0.04 Mpa.
Further, the alternating current applied to the solid inlay by the alternating current power supply has a frequency of 50Hz to 200Hz and a current value of 50A to 150A.
Further, the steady magnetic field generated after the steady magnetic field coil is started is 0.4T-1.5T.
Further, the exciting current of the rotating magnetic field coil is 80A-400A, the exciting field frequency is 20 Hz-150 Hz, and the forward and reverse rotation switching time is 0 s-20 s.
In general, compared with the prior art, the equipment and the method for casting the magnesium-aluminum bimetallic casting by the magnetic field auxiliary lost foam mainly comprise the following steps of
The beneficial effects are that:
1. the rotating magnetic field coil can generate electromagnetic stirring effect in the melt, and the electromagnetic stirring can lead the melt to generate strong flow, promote migration and diffusion of high-melting-point precipitated phases in the melt, thereby improving the uniformity of solidification structures of the magnesium-aluminum bimetallic interface.
2. According to the invention, the solidification structure of the magnesium-aluminum bimetal interface is regulated and controlled by the magnetic field based on the modes of the constant magnetic field, the rotating magnetic field and the alternating current, and vibration is generated by the synergistic effect of the constant magnetic field and the alternating current, so that the effect of the composite external field is realized by combining the stirring of the melt by the rotating magnetic field, the tissue performance of the magnesium-aluminum bimetal interface can be better regulated and controlled, compared with the prior art, the process is simple, the regulation and control effect on the solidification structure of the bimetal interface is good, and the balance between the regulation and control effect and the process cost can be realized.
3. According to the invention, alternating current is introduced into two ends of the solid inlay, a steady magnetic field is generated outside the inlay through the steady magnetic field coil, in the compounding process, the electrified solid inlay in the steady magnetic field is vibrated by the action of Lorentz force, and vibration can directly act on a bimetal interface, so that a continuous oxide film on the surface of the inlay can be gradually broken and dissolved in the compounding process, and the oxide film is prevented from remaining in an interface area in the solidification process; meanwhile, as vibration directly acts on the bimetal interface area, dendrites formed in the initial solidification stage of the interface area are broken, a large number of free crystal nuclei are generated, and the nucleation rate in the solidification process is improved, so that the solidification structure of the bimetal interface is refined.
4. Lost foam casting adopts loose sand to mould, compacts the sand mould through the evacuation, and consequently the installation of magnetic field generation coil is comparatively convenient, can directly place in the sand box inside, has avoided the shielding effect of sand box to the magnetic field.
Drawings
FIG. 1 is a schematic diagram of an apparatus for magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings provided by the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: 1-composite model, 101-pouring system foam pattern, 102-casting foam pattern, 103-solid inlay, 104-pouring cup, 105-molten metal pouring position, 2-magnetic field generating device, 201-steady magnetic field coil, 202-rotating magnetic field coil, 203-wire, 204-alternating current power supply, 3-sand box system, 301-sand box, 302-dry sand, 303-three-dimensional vibration table, 304-film and 305-vacuumizing tube.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1, the invention provides a device for casting a magnesium-aluminum bimetal casting by using a magnetic field auxiliary lost foam, which comprises a composite model 1, a magnetic field generating device 2 and a sand box system 3, wherein the composite model 1 and the magnetic field generating device 2 are respectively arranged on the sand box system 3.
The composite model 1 comprises a pouring system foam pattern 101, a casting foam pattern 102, a solid inlay 103 and a pouring cup 104, wherein the pouring system foam pattern 101 and the casting foam pattern 102 are connected and are all arranged in dry sand 302 of the sand box system 3. The pouring cup 104 is connected to the pouring system foam pattern 101 and protrudes from the flask system 3. The solid inlay 103 is embedded in the flask system 3, which is connected to the magnetic field generating device 2. A metal pouring position is arranged in the pouring cup 104, and molten metal is poured into the composite model 1 from the metal pouring position.
The sand box system 3 comprises a sand box 301, dry sand 302, a three-dimensional vibration platform, a film 304 and a vacuumizing tube 305, wherein the dry sand 302 is arranged in the sand box 301, and the sand box is arranged on the three-dimensional vibration platform. The evacuation tube 305 is connected to the flask to evacuate the flask. The membrane 304 is operative to overlie the flask to close the flask opening.
The gating system foam pattern 101 and the casting foam pattern 102 are all disposed in the dry sand 302 within the flask.
The magnetic field generating device 2 comprises a steady magnetic field coil 201, a rotating magnetic field coil 202, a wire 203 and an alternating current power supply 204, wherein the steady magnetic field coil 201 is sleeved outside the casting foam pattern 102, and the rotating magnetic field coil 202 is sleeved on the periphery of the steady magnetic field coil 201. The alternating current power supply 204 is arranged outside the sand box, and two ends of the solid inlay 103 are respectively connected with the alternating current power supply 204 through the lead 203.
The distance between the steady magnetic field coil 201 and the composite model 1 needs to be adjusted according to the size of the casting, and is not lower than 2 cm-10 cm. The height of the solid inlay 103 extending out of the casting mold portion is 5mm to 20mm.
The invention also provides a use method of the equipment for casting the magnesium-aluminum bimetallic casting by using the magnetic field-assisted lost foam, which mainly comprises the following steps of:
(1) The composite model 1 is placed in a sand box, a steady magnetic field coil 201 and a rotating magnetic field coil 202 are placed near the composite model 1 in sequence, and the top and the bottom of the solid inlay 103 are respectively connected with an alternating current power supply 204 through a lead 203.
(2) And then vibrating and filling sand into a sand box, covering a layer of film 304 on the top of the sand box after filling the sand box, vacuumizing the sand box through a vacuumizing pipe 305 to compact dry sand 302 in the sand box, and then installing a pouring cup 104 on the top of a pouring system of the composite model 1, thereby completing the molding process.
(3) The alternating current power supply 204 of the magnetic field generating device 2 is started to apply alternating current to the solid inlay 103, and simultaneously the steady magnetic field coil 201 is started.
(4) Pouring molten metal from the pouring cup 104, and after the pouring is completed, starting the rotating magnetic field coil 202 in the magnetic field generating device 2.
(5) After the molten metal in the sand box is solidified, the magnetic field generating device 2 is closed and cleaned, the composite model 1 is removed, and finally the bimetal casting is obtained.
The vacuum pumping pipe 305 is used for carrying out vacuum pumping treatment on the sand box, so that the vacuum degree in the sand box is 0.015 Mpa-0.04 Mpa. The alternating current applied to the solid inlay 103 by the alternating current power supply 204 has a frequency of 50Hz to 200Hz and a current value of 50A to 150A. The steady magnetic field generated after the steady magnetic field coil 201 is started is 0.4T-1.5T. The exciting current of the rotating magnetic field coil 202 is 80A-400A, the exciting field frequency is 20 Hz-150 Hz, and the forward and reverse rotation switching time is 0 s-20 s.
The invention is further described in detail in the following examples.
Example 1
The cast foam pattern was a 35X 100mm cube and the solid inlay was a cylinder 10mm in diameter and 110mm in height. The solid inlay is made of A356 aluminum alloy, the casting molten metal is AZ91D magnesium alloy, and the height of the part of the solid inlay extending out of the casting foam pattern in the composite model is 5mm.
In the use process, firstly, the composite model is put into a sand box, a steady magnetic field coil and a rotating magnetic field coil are placed near the composite model in sequence, and the steady magnetic field coil is positioned inside the rotating magnetic field coil and is 2cm away from the composite model; the top and the bottom of the solid inlay are respectively connected with an alternating current power supply through wires; vibrating and filling sand until a sand box is filled, covering a layer of film on the top of the sand box after the sand box is filled, and vacuumizing the sand box through a vacuumizing tube, wherein the vacuum degree is 0.015MPa; and then installing a pouring cup at the top of the pouring system foam pattern of the composite model to finish the modeling process.
Then, an alternating current power supply in the magnetic field generating device is started, alternating current with the frequency of 50Hz and the current value of 50A is applied to the solid inlay, and meanwhile, a steady magnetic field coil is started, so that the generated steady transverse magnetic field is 0.4T.
And pouring AZ91D magnesium alloy liquid from a pouring cup, wherein the pouring temperature is 750 ℃, and after pouring is finished, starting a rotating magnetic field coil in the magnetic field generating device, wherein the exciting current of the coil is 80A, the exciting field frequency is 20Hz, and the forward and reverse rotation switching time is 20s.
The implementation effect is as follows: the refining of the Al-Mg intermetallic compound of the magnesium/aluminum bimetallic interface is more than 40%, the refining of the eutectic structure is more than 30%, and the bonding strength of the bimetallic interface is improved by more than 35%.
Example 2
The cast foam model was a 35X 100mm cube and the solid inlay was a cylinder 10mm in diameter and 110mm in height. The solid inlay is made of A356 aluminum alloy, the casting molten metal is AZ91D magnesium alloy, and the height of the part of the solid inlay extending out of the casting foam model in the composite model is 5mm.
In the use process, firstly, the composite model is put into a sand box, a steady magnetic field coil and a rotating magnetic field coil are placed near the composite model in sequence, and the steady magnetic field coil is positioned inside the rotating magnetic field coil and is 2cm away from the composite model; the top and the bottom of the solid inlay are respectively connected with an alternating current power supply through wires; vibrating and filling sand until a sand box is filled, covering a layer of film on the top of the sand box after the sand box is filled, and vacuumizing the sand box through a vacuumizing tube, wherein the vacuum degree is 0.015MPa; and then installing a pouring cup at the top of the pouring system foam model of the composite model to finish the modeling process.
Then, an alternating current power supply in the magnetic field generating device is started, alternating current with the frequency of 120Hz and the current value of 100A is applied to the solid inlay, and meanwhile, a steady magnetic field coil is started, so that the generated steady transverse magnetic field is 0.8T.
And pouring AZ91D magnesium alloy liquid from a pouring cup, wherein the pouring temperature is 720 ℃, and after pouring is finished, starting a rotating magnetic field coil in the magnetic field generating device, wherein the exciting current of the coil is 160A, the exciting field frequency is 80Hz, and the forward and reverse rotation switching time is 10s.
The implementation effect is as follows: the refining of the Al-Mg intermetallic compound of the magnesium/aluminum bimetallic interface is more than 50%, the refining of the eutectic structure is more than 45%, and the bonding strength of the bimetallic interface is improved by more than 60%.
Example 3
The cast foam model was a 35X 100mm cube and the solid inlay was a cylinder 10mm in diameter and 110mm in height. The solid inlay is made of A356 aluminum alloy, the casting molten metal is AZ91D magnesium alloy, and the height of the part of the solid inlay extending out of the casting foam model in the composite model is 5mm.
In the use process, firstly, the composite model is put into a sand box, a steady magnetic field coil and a rotating magnetic field coil are placed near the composite model in sequence, and the steady magnetic field coil is positioned inside the rotating magnetic field coil and has a distance of 2cm with the composite model; the top and the bottom of the solid inlay are respectively connected with an alternating current power supply through wires; vibrating and filling sand until a sand box is filled, covering a layer of plastic film on the top of the sand box after the sand box is filled, and vacuumizing the sand box through a vacuumizing tube, wherein the vacuum degree is 0.03MPa; and then installing a pouring cup at the top of the pouring system foam model of the composite model to finish the modeling process.
Then, an alternating current power supply in the magnetic field generating device is started, alternating current with the frequency of 150Hz and the current value of 140A is applied to the solid inlay, and meanwhile, a steady magnetic field coil is started, so that the generated steady transverse magnetic field is 1.3T.
And pouring AZ91D magnesium alloy liquid from a pouring cup, wherein the pouring temperature is 700 ℃, and after pouring, starting a rotating magnetic field coil in the magnetic field generating device, wherein the exciting current of the coil is 350A, the exciting field frequency is 120Hz, and the forward and reverse rotation switching time is 15s.
The implementation effect is as follows: the refining of the Al-Mg intermetallic compound of the magnesium/aluminum bimetallic interface is more than 70%, the refining of the eutectic structure is more than 60%, and the bonding strength of the bimetallic interface is improved by more than 85%.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a supplementary lost foam casting magnesium aluminium bimetal foundry goods's of magnetic field equipment which characterized in that:
the equipment comprises a sand box, a casting foam pattern, a solid inlay, a steady magnetic field coil, a rotating magnetic field coil and an alternating current power supply, wherein dry sand is filled in the sand box, the casting foam pattern is arranged in the dry sand, the solid inlay is embedded in the casting foam pattern, and two opposite ends of the solid inlay are connected with the alternating current power supply; the steady magnetic field coil is sleeved outside the casting foam pattern, and the rotating magnetic field coil is sleeved on the periphery of the steady magnetic field coil.
2. The apparatus for magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to claim 1, wherein: the device further comprises a pouring system foam pattern and a pouring cup, wherein the pouring system foam pattern is arranged in the dry sand and connected with the pouring cup.
3. The apparatus for magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to claim 1, wherein: the apparatus further includes a three-dimensional vibratory table on which the sand box is disposed.
4. An apparatus for the magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to claim 3, wherein: the apparatus includes a vacuum tube connected to the flask for evacuating the flask.
5. An apparatus for the magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to claim 3, wherein: the apparatus includes a membrane for covering the opening of the flask.
6. The apparatus for magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to claim 1, wherein: the height of the part of the solid inlay extending out of the casting foam pattern is 5 mm-20 mm.
7. A method of using the apparatus for magnetic field assisted lost foam casting of magnesium aluminum bimetallic castings according to any one of claims 1-6, wherein: and vacuumizing the sand box through a vacuumizing pipe to ensure that the vacuum degree in the sand box is 0.015-0.04 Mpa.
8. The method for using the equipment for casting the magnesium-aluminum bimetallic casting by using the magnetic field auxiliary lost foam according to claim 7, wherein the equipment comprises the following steps: the alternating current applied to the solid inlay by the alternating current power supply has the frequency of 50 Hz-200 Hz and the current value of 50A-150A.
9. The method for using the equipment for casting the magnesium-aluminum bimetallic casting by using the magnetic field auxiliary lost foam according to claim 7, wherein the equipment comprises the following steps: the steady magnetic field generated after the steady magnetic field coil is started is 0.4T-1.5T.
10. The method for using the equipment for casting the magnesium-aluminum bimetallic casting by using the magnetic field auxiliary lost foam according to claim 7, wherein the equipment comprises the following steps: the exciting current of the rotating magnetic field coil is 80A-400A, the exciting field frequency is 20 Hz-150 Hz, and the forward and reverse rotation switching time is 0 s-20 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310908175.1A CN116944472A (en) | 2023-07-24 | 2023-07-24 | Equipment method for casting magnesium-aluminum bimetallic casting by using magnetic field-assisted lost foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310908175.1A CN116944472A (en) | 2023-07-24 | 2023-07-24 | Equipment method for casting magnesium-aluminum bimetallic casting by using magnetic field-assisted lost foam |
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| Publication Number | Publication Date |
|---|---|
| CN116944472A true CN116944472A (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310908175.1A Pending CN116944472A (en) | 2023-07-24 | 2023-07-24 | Equipment method for casting magnesium-aluminum bimetallic casting by using magnetic field-assisted lost foam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116944472A (en) |
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2023
- 2023-07-24 CN CN202310908175.1A patent/CN116944472A/en active Pending
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