CN115261653B - Preparation method of modified ZL102 aluminum alloy - Google Patents
Preparation method of modified ZL102 aluminum alloy Download PDFInfo
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- CN115261653B CN115261653B CN202210965505.6A CN202210965505A CN115261653B CN 115261653 B CN115261653 B CN 115261653B CN 202210965505 A CN202210965505 A CN 202210965505A CN 115261653 B CN115261653 B CN 115261653B
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- aluminum alloy
- power supply
- induction heating
- vacuum box
- box body
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 35
- 230000006698 induction Effects 0.000 claims description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims description 18
- 239000011733 molybdenum Substances 0.000 claims description 18
- 229910052582 BN Inorganic materials 0.000 claims description 16
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000005496 eutectics Effects 0.000 abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052710 silicon Inorganic materials 0.000 abstract description 9
- 239000010703 silicon Substances 0.000 abstract description 9
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910000676 Si alloy Inorganic materials 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000007670 refining Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention relates to a preparation method of modified ZL102 aluminum alloy, which belongs to the technical field of metallurgy and solves the technical problems of refining grain structure of aluminum-silicon alloy, changing the form and size of eutectic silicon in alloy and adjusting the relative quantity of various structures to improve the mechanical property of the alloy, and the preparation method comprises the following steps: and (3) completely melting the ZL102 aluminum alloy sample in a vacuum environment and a protective atmosphere, and applying electric pulse in the cooling and solidifying process of the ZL102 aluminum alloy liquid along with a furnace to prepare the modified ZL102 aluminum alloy. The invention has simple operation, the ZL102 aluminum alloy prepared under the action of electric pulse improves the structure of the ZL102 aluminum alloy, the processed structure consists of a matrix aluminum and aluminum silicon eutectic structure, no primary crystal silicon appears, the shape of the eutectic silicon becomes punctiform and tiny fiber, the eutectic component in the structure is reduced, and the eutectic phase is refined.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a preparation method of a modified ZL102 aluminum alloy.
Background
The aluminum alloy has the advantages of easy casting and welding, light weight, strong corrosion resistance and the like, is widely applied worldwide, particularly in the field of automobiles, can effectively reduce fuel consumption and exhaust emission by reducing the mass of the automobile body, and meets the requirements exactly.
In the case of cast aluminum alloys, aluminum-silicon alloys account for a significant portion. The addition of Si element to aluminum alloy can increase the strength of the matrix, but the plasticity thereof is lowered. As the Si content increases, the number of eutectic structures in the aluminum-silicon alloy increases. Eutectic silicon exists in a coarse lath or needle-shaped form, so that the aluminum matrix is seriously damaged, and the plasticity and toughness of the alloy are reduced. Therefore, refining the grain structure of the aluminum-silicon alloy, changing the form and size of eutectic silicon in the alloy and adjusting the relative quantity of various structures to improve the mechanical properties of the alloy becomes a hot spot for scientific research. The most effective method for improving the microstructure of the alloy is to carry out modification treatment on the aluminum-silicon alloy besides rapid solidification, extrusion casting and ultrasonic vibration.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a modified ZL102 aluminum alloy.
The technical scheme adopted by the invention is as follows:
a preparation method of modified ZL102 aluminum alloy comprises the following steps:
s1, a cover plate is arranged above a vacuum box body, an induction heating coil is arranged below the surface of the cover plate, and the induction heating coil is connected with a high-frequency induction heating power supply outside the vacuum box body in series through a wire; molybdenum electrodes are oppositely arranged through the side walls of the two sides of the boron nitride crucible, the molybdenum electrodes are connected with pulse power supply electrode columns introduced through the cover plate, and the molybdenum electrode crucible device and the oscilloscope are connected in parallel in a pulse power supply circuit through wires;
firstly, fixedly mounting a pair of molybdenum electrodes on the side wall of a boron nitride crucible through conductive connecting bolts, penetrating the conductive connecting bolts through the side wall of the boron nitride crucible, putting ZL102 aluminum alloy samples into the boron nitride crucible, and enabling the inner side ends of the conductive connecting bolts to be in contact with two ends corresponding to the ZL102 aluminum alloy samples; then, the boron nitride crucible containing the sample is placed in an induction heating coil, a molybdenum electrode is fixed with a pulse electrode column below a cover plate, the cover plate is buckled and fixed with a vacuum box body, and the vacuum box body is vacuumized until the pressure is 2 multiplied by 10 -4 Pa; finally, closing a vacuum valve of the vacuum box body and filling argon into the vacuum box body until the pressure in the vacuum box body is 50kPa;
s2, turning on a high-frequency induction heating power supply, heating the sample in the vacuum box body through an induction heating coil until the ZL102 aluminum alloy sample is completely melted, and then preserving heat at 700 ℃ for 10min;
and S3, turning off a high-frequency induction heating power supply, starting a pulse power supply, applying an electric pulse to the ZL102 aluminum alloy liquid prepared in the step S2, wherein the output voltage of the pulse power supply is 210V, the pulse width is 0-8 mu S, the frequency is 1000-4000 Hz, continuously applying the electric pulse until the ZL102 aluminum alloy liquid is cooled and solidified along with a furnace, and turning off the pulse power supply to prepare the modified ZL102 aluminum alloy.
Further, in the step S1, an induction heating coil is fixedly installed on the lower surface of the cover plate by bolts.
Further, in the step S1, the pulse power supply and the oscilloscope are both disposed outside the vacuum box, the molybdenum electrode crucible device is disposed inside the vacuum box, and the electrode column connected by the wire penetrates through the cover plate and is connected with the molybdenum electrode crucible device.
Further, in the step S2, the heating temperature of the induction heating coil is 700 ℃.
Further, in the step S3, the pulse current of the pulse power supply is realized by adjusting the peak value of the output voltage displayed on the oscilloscope.
Compared with the prior art, the invention has the beneficial effects that:
the invention has simple operation, the ZL102 aluminum alloy prepared under the action of electric pulse improves the structure of the ZL102 aluminum alloy, the processed structure consists of a matrix aluminum and aluminum silicon eutectic structure, no primary crystal silicon appears, the shape of the eutectic silicon becomes punctiform and tiny fiber, the eutectic component in the structure is reduced, and the eutectic phase is refined.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
in the figure: 1 is an oscilloscope, 2 is a pulse power supply, 3 is a high-frequency induction heating power supply, 4 is a molybdenum electrode, 5 is a ZL102 aluminum alloy sample, 6 is a boron nitride crucible, 7 is a vacuum box, 8 is an induction heating coil, 9 is a cover plate, and 10 is a conductive connecting bolt;
fig. 2 is a SEM image of a 3000Hz electrical pulse treated ZL102 aluminum alloy.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
A preparation method of modified ZL102 aluminum alloy comprises the following steps:
s1, as shown in FIG. 1, a cover plate 9 is arranged above a vacuum box 7, an induction heating coil 8 is arranged on the lower surface of the cover plate 9, and the induction heating coil 8 is connected in series with a high-frequency induction heating power supply 3 outside the vacuum box 7 through a wire; molybdenum electrodes 4 are oppositely arranged through the side walls of two sides of the boron nitride crucible 6, and the molybdenum electrodes 4 and the oscilloscope 1 are connected in parallel in a circuit of the pulse power supply 2 through wires;
the sizes of ZL102 aluminum alloy sample 5 are: firstly, fixedly mounting a pair of molybdenum electrodes 4 on the side wall of a boron nitride crucible 6 through conductive connecting bolts 10, penetrating the conductive connecting bolts 10 through the side wall of the boron nitride crucible 6, placing ZL102 aluminum alloy samples into the boron nitride crucible 6, and respectively contacting the inner side ends of the conductive connecting bolts 10 with two corresponding ends of the ZL102 aluminum alloy samples; then, the boron nitride crucible containing the sample is placed in a heating field of an induction heating coil 8, a cover plate 9 is buckled and fixed with a vacuum box 7, and the vacuum box is vacuumized to a pressure of 2 multiplied by 10 -4 Pa; finally, closing a vacuum valve of the vacuum box body 7 and filling argon into the vacuum box body 7 until the pressure in the vacuum box body 7 is 50kPa;
s2, turning on a high-frequency induction heating power supply 3, heating a sample in a vacuum box 7 through an induction heating coil 8 until the ZL102 aluminum alloy sample is completely melted, heating the induction heating coil 8 at 700 ℃, and then preserving heat at 700 ℃ for 10min;
s3, turning off the high-frequency induction heating power supply 3, starting the pulse power supply 2, applying an electric pulse to the ZL102 aluminum alloy liquid prepared in the step S2, realizing pulse current of the pulse power supply 2 by adjusting a peak value of output voltage displayed on the oscilloscope 1, enabling the output voltage of the pulse power supply 2 to be 210V, enabling the pulse width to be 0 mu S-8 mu S, enabling the frequency to be 1000 Hz-4000 Hz, continuously applying the electric pulse until the ZL102 aluminum alloy liquid is cooled and solidified along with a furnace, and turning off the pulse power supply 2 to prepare the modified ZL102 aluminum alloy.
As shown in FIG. 2, the microstructure of the modified ZL102 aluminum alloy is obviously improved, the microstructure after modification consists of a matrix aluminum-silicon eutectic structure, no primary crystal silicon is present, the morphology of the eutectic silicon becomes punctiform and fine fiber, the eutectic component in the microstructure is reduced, and the eutectic phase is refined.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The preparation method of the modified ZL102 aluminum alloy is characterized by comprising the following steps of:
s1, a cover plate is arranged above a vacuum box body, an induction heating coil is arranged below the surface of the cover plate, and the induction heating coil is connected with a high-frequency induction heating power supply outside the vacuum box body in series through a wire; molybdenum electrodes are oppositely arranged through the side walls of the two sides of the boron nitride crucible, the molybdenum electrodes are connected with pulse power supply electrode columns introduced through the cover plate, and the molybdenum electrode crucible device and the oscilloscope are connected in parallel in a pulse power supply circuit through wires;
firstly, fixedly mounting a pair of molybdenum electrodes on the side wall of a boron nitride crucible through conductive connecting bolts, penetrating the conductive connecting bolts through the side wall of the boron nitride crucible, putting ZL102 aluminum alloy samples into the boron nitride crucible, and enabling the inner side ends of the conductive connecting bolts to be in contact with two ends corresponding to the ZL102 aluminum alloy samples; then, the boron nitride crucible containing the sample is placed in an induction heating coil, a molybdenum electrode is fixed with a pulse electrode column below a cover plate, the cover plate is buckled and fixed with a vacuum box body, and the vacuum box body is vacuumized until the pressure is 2 multiplied by 10 -4 Pa; finally, closing a vacuum valve of the vacuum box body and filling argon into the vacuum box body until the pressure in the vacuum box body is 50kPa;
s2, turning on a high-frequency induction heating power supply, heating the sample in the vacuum box body through an induction heating coil until the ZL102 aluminum alloy sample is completely melted, and then preserving heat at 700 ℃ for 10min;
and S3, turning off a high-frequency induction heating power supply, starting a pulse power supply, applying an electric pulse to the ZL102 aluminum alloy liquid prepared in the step S2, wherein the output voltage of the pulse power supply is 210V, the pulse width is 0-8 mu S, the frequency is 1000-4000 Hz, continuously applying the electric pulse until the ZL102 aluminum alloy liquid is cooled and solidified along with a furnace, and turning off the pulse power supply to prepare the modified ZL102 aluminum alloy.
2. The method for preparing the modified ZL102 aluminum alloy according to claim 1, wherein the method comprises the following steps: in the step S1, an induction heating coil and a pulse power electrode connection post are fixedly mounted on the lower surface of the cover plate through bolts.
3. The method for preparing the modified ZL102 aluminum alloy according to claim 1, wherein the method comprises the following steps: in the step S1, the pulse power supply and the oscilloscope are both arranged outside the vacuum box body, the pulse power supply and the molybdenum electrode are connected through the electrode column penetrating cover plate connected through the lead, and the oscilloscope and the molybdenum electrode crucible device are connected in parallel in the pulse circuit.
4. The method for preparing the modified ZL102 aluminum alloy according to claim 1, wherein the method comprises the following steps: in the step S2, the heating temperature of the induction heating coil is 700 ℃.
5. The method for preparing the modified ZL102 aluminum alloy according to claim 1, wherein the method comprises the following steps: in the step S3, the pulse current of the pulse power supply is realized by adjusting the peak value of the output voltage displayed on the oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210965505.6A CN115261653B (en) | 2022-08-12 | 2022-08-12 | Preparation method of modified ZL102 aluminum alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210965505.6A CN115261653B (en) | 2022-08-12 | 2022-08-12 | Preparation method of modified ZL102 aluminum alloy |
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| CN115261653A CN115261653A (en) | 2022-11-01 |
| CN115261653B true CN115261653B (en) | 2023-11-10 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
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- 2022-08-12 CN CN202210965505.6A patent/CN115261653B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175315A (en) * | 2018-09-27 | 2019-01-11 | 太原科技大学 | A kind of preparation method of copper and iron immiscible alloy |
Non-Patent Citations (1)
| Title |
|---|
| 王新华等.冶金研究(2005).冶金工业出版社,2005,381-384. * |
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| CN115261653A (en) | 2022-11-01 |
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