CN111850359A - Aluminum alloy applied to electric vehicle charging and preparation method thereof - Google Patents
Aluminum alloy applied to electric vehicle charging and preparation method thereof Download PDFInfo
- Publication number
- CN111850359A CN111850359A CN202010748437.9A CN202010748437A CN111850359A CN 111850359 A CN111850359 A CN 111850359A CN 202010748437 A CN202010748437 A CN 202010748437A CN 111850359 A CN111850359 A CN 111850359A
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- ingot
- electric vehicle
- vehicle charging
- aluminum
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
-
- 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
-
- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Conductive Materials (AREA)
Abstract
The invention provides an aluminum alloy applied to electric vehicle charging and a preparation method thereof, which are characterized in that through optimizing the components of the aluminum alloy and adding trace elements in a certain proportion, after an aluminum alloy ingot is treated by high-pressure torsion, the crystal grain refinement can be obviously promoted through heating and heat preservation treatment, and the uniform nanocrystalline structure is formed through distortion deformation and presents fiber distribution, meanwhile, a large-angle crystal boundary larger than 15 degrees migrates to a crystal boundary with a smaller angle, the average crystal grain size of the obtained aluminum alloy is 40-60nm, the hardness of the aluminum alloy is ensured, the plasticity and heat resistance of the aluminum alloy can be ensured, the yield of the product is improved, and the problem that the fine and uniform crystal aluminum alloy cannot be obtained in the aluminum alloy processing process, so that the prepared aluminum alloy material has poor plasticity and heat resistance in the use of the plasticity.
Description
Technical Field
The invention relates to the field of aluminum alloy preparation, in particular to an aluminum alloy applied to electric vehicle charging and a preparation method thereof.
Background
Because of its excellent properties, aluminum alloys are widely used in many engineering fields, and with the development of times and technologies, people have made higher and higher demands on the properties of materials, so researchers have continuously sought more preparation methods to improve the properties of materials, and with the continuous and deep research, various preparation methods of materials with high properties have been developed, including large plastic deformation methods, which can prepare some materials with finer crystals, but these traditional methods still have the problems of high preparation cost and low processing efficiency. In addition, in the preparation process of the traditional aluminum alloy, the structure crystal is too large, so that the comprehensive performance is poor, and better plasticity and heat resistance cannot be obtained.
For example, patent No. 105154704a discloses a preparation method of a high-temperature-resistant magnesium alloy material, and for example, patent No. CN108977702A discloses an aluminum alloy and a preparation method of an aluminum alloy casting. However, although the above-mentioned production of aluminum alloys can reduce casting defects, it has not yet been possible to solve the problems of low plasticity and poor heat resistance.
In the field of aluminum alloy preparation, the practical application of the aluminum alloy has problems to be solved, for example, a fine and uniform crystal aluminum alloy cannot be obtained in the aluminum alloy processing process, so that the prepared aluminum alloy material has poor plasticity in the use of plasticity.
Disclosure of Invention
The invention provides an aluminum alloy applied to electric vehicle charging and a preparation method thereof, aiming at solving the problem that fine and uniform crystal aluminum alloy cannot be obtained in the aluminum alloy processing process, so that the prepared aluminum alloy material has poor plasticity and heat resistance in the use of plasticity.
In order to achieve the purpose, the invention adopts the following technical scheme:
the aluminum alloy applied to electric vehicle charging comprises the following components in percentage by weight: 0.25 to 1.38% of Zn, Mn: 0.5-1.1%, Mg: 7.5-9.5%, Cr: 0.04-0.5%, Ni: 0.1-0.4%, Ti: 0.01-0.15%, trace elements: 0.1-0.5%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the electric vehicle charging is 40-60 nm.
Optionally, the paint comprises the following components in percentage by weight: 0.55-1.12% of Zn, Mn: 0.8-1.0%, Mg: 8.0-9.0%, Cr: 0.1-0.4%, Ni: 0.2-0.3%, Ti: 0.03-0.12%, trace elements: 0.2-0.4%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the charging of the electric vehicle is dTEM and is 45-55 nm.
Optionally, the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 1-8:1-10: 1-3. .
Optionally, the impurity elements are Fe < 0.05%, Si < 0.03%, and Cu < 0.05%.
In addition, the application provides a preparation method of the aluminum alloy applied to electric vehicle charging, which comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 700-750 ℃ to obtain an aluminum solution;
s3, cooling to 650-;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 730-750 ℃ to form an aluminum alloy ingot, slowly cooling, keeping the vacuum state in the cooling process, and keeping the vacuum degree below 5 torr;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to the temperature of 250-350 ℃, preserving heat for 1-5 hours, and cooling to the room temperature to obtain the aluminum alloy applied to electric vehicle charging.
Optionally, the raw materials in S1 are: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and trace element aluminum-based intermediate alloy.
Optionally, the cooling rate in S3 is 20-25 ℃/min; the stirring conditions are as follows: 8000- & ltSUB & gt 15000 r/min.
Optionally, the slow cooling rate in S4 is 5-10 deg.C/min.
Optionally, the pressure born by the disk-shaped aluminum alloy ingot in S5 is 1.2-5 Gpa.
Optionally, in S5, the high-pressure twisting device includes a fixed upper die and a rotatable lower die, the fixed upper die has a first groove, the rotatable lower die has a second groove, and the first groove and the second groove are oppositely disposed to form an accommodating cavity, in which the disc-shaped aluminum alloy ingot can be placed.
Compared with the prior art, the invention has the beneficial technical effects that:
1. after the aluminum alloy ingot is treated by high-pressure torsion, the grain refinement can be obviously promoted by heating and heat preservation treatment, the uniform nanocrystalline structure is formed by distortion deformation, the fiber distribution is presented, and meanwhile, large-angle grain boundaries larger than 15 degrees migrate to smaller-angle grain boundaries, and the average grain size of the obtained aluminum alloy dTEM is 40-60 nm.
2. In the process of preparing the aluminum alloy, the temperature is controlled at 250-350 ℃, the heat preservation is carried out for 1-5h, the internal storage energy of the fine-grained aluminum alloy can be continuously released, the deformed crystal is gradually changed into the sub-crystal and is tracked to be changed into the recrystallization, and the plasticity and the heat resistance of the aluminum alloy can be ensured while the hardness of the aluminum alloy is ensured.
3. The aluminum alloy prepared by the invention also has excellent mechanical property and stability, the component proportion of trace elements is particularly limited by optimizing the components, the component proportion and the preparation process of the aluminum alloy, the melt fluidity is increased while the crystal is refined, and the overall yield of the aluminum alloy is improved.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings.
FIG. 1 is a schematic flow chart of a method for preparing an aluminum alloy for an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a high voltage torsion apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic microstructure view of an aluminum alloy according to one embodiment of the present invention;
FIG. 4 is a schematic view of a microstructure of the aluminum alloy prepared in comparative example 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The aluminum alloy applied to electric vehicle charging comprises the following components in percentage by weight: 0.25 to 1.38% of Zn, Mn: 0.5-1.1%, Mg: 7.5-9.5%, Cr: 0.04-0.5%, Ni: 0.1-0.4%, Ti: 0.01-0.15%, trace elements: 0.1-0.5%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the electric vehicle charging is 40-60 nm.
Wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 1-8:1-10: 1-3. According to the aluminum alloy provided by the invention, the element composition and content of the aluminum alloy are adjusted and optimized, the trace elements are added, and the trace elements synergistically generate an effect under a specific proportion, so that the fluidity of a melt is increased while crystal grains are refined, and the subsequent castability of the aluminum alloy is improved.
According to the aluminum alloy of the present invention, when the composition is within the above range, high mechanical properties can be obtained while obtaining good castability. The semi-solid die-casting aluminum alloy obtained by adopting the formula has the tensile strength not lower than 450MPa, the yield strength not lower than 320MPa and the elongation not lower than 10%.
In the invention, in order to further improve the comprehensive performance of the aluminum alloy, the aluminum alloy preferably comprises the following components in percentage by weight: 0.55-1.12% of Zn, Mn: 0.8-1.0%, Mg: 8.0-9.0%, Cr: 0.1-0.4%, Ni: 0.2-0.3%, Ti: 0.03-0.12%, trace elements: 0.2-0.4%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the charging of the electric vehicle is dTEM and is 45-55 nm.
According to the aluminum alloy provided by the invention, the purity of the aluminum alloy is one of important factors influencing the performance of the aluminum alloy, and in order to ensure that the performance of the aluminum alloy is excellent, the impurity elements are preferably less than 0.05 percent of Fe, less than 0.03 percent of Si and less than 0.05 percent of Cu.
In addition, the invention also provides a preparation method of the aluminum alloy applied to electric vehicle charging, which comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 700-750 ℃ to obtain an aluminum solution;
s3, cooling to 650-;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 730-750 ℃ to form an aluminum alloy ingot, slowly cooling, keeping the vacuum state in the cooling process, and keeping the vacuum degree below 5 torr;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to the temperature of 250-350 ℃, preserving heat for 1-5 hours, and cooling to the room temperature to obtain the aluminum alloy applied to electric vehicle charging.
Wherein, the raw materials in S1 are: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy; the cooling rate in S3 is 20-25 ℃/min; the stirring conditions are as follows: 8000- & ltSUB & gt 15000 r/min; the slow cooling speed in S4 is 5-10 ℃/min; the pressure born by the disc-shaped aluminum alloy ingot in the S5 is 1.2-5 Gpa; the high-pressure torsion device comprises a fixed upper die and a rotatable lower die in S5, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are arranged oppositely to form a containing cavity, and the containing cavity can be used for containing the disc-shaped aluminum alloy ingot.
The aluminum alloys of the present disclosure and methods of making the same are further illustrated by the following examples:
example 1:
this example is for explaining the method of preparing the aluminum alloy for electric vehicle charging of the present invention,
the aluminum alloy comprises the following components in percentage by weight: 1.12% of Zn, Mn: 1.0%, Mg: 9.0%, Cr: 0.1%, Ni: 0.3%, Ti: 0.12%, trace elements: 0.4 percent of impurity elements, less than or equal to 0.5 percent of impurity elements and the balance of Al, wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 8:1: 3;
the method comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy; the method specifically comprises the following steps: the raw materials are as follows: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 750 ℃ to obtain an aluminum solution;
s3, cooling to 690 ℃, sequentially adding the rest raw materials into the aluminum solution under the stirring condition, slagging off after the rest raw materials are completely dissolved, and preserving heat for 60min to obtain aluminum alloy liquid; the specific cooling rate is 25 ℃/min; the stirring conditions are as follows: 15000r/min
S4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 750 ℃ to form an aluminum alloy ingot, slowly cooling, and keeping the vacuum state in the cooling process, wherein the vacuum degree is lower than 5 torr; the specific slow cooling speed is 10 ℃/min;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device; specifically, the high-pressure torsion device comprises a fixed upper die and a rotatable lower die, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are arranged oppositely to form a containing cavity, the disc-shaped aluminum alloy ingot can be placed in the containing cavity, and the pressure born by the disc-shaped aluminum alloy ingot is 5 Gpa;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to 350 ℃, preserving heat for 5 hours, and cooling to room temperature to obtain a sample A1.
Example 2:
this example is for explaining the method of preparing the aluminum alloy for electric vehicle charging of the present invention,
the aluminum alloy comprises the following components in percentage by weight: 0.55% of Zn, Mn: 0.8%, Mg: 8.0%, Cr: 0.4%, Ni: 0.3%, Ti: 0.12%, trace elements: 0.4 percent, less than or equal to 0.5 percent of impurity elements and the balance of Al, wherein the trace elements are B, Re and Zr, and the mass percent ratio of B, Re and Zr is 1: 1: 3;
the method comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy; the method specifically comprises the following steps: the raw materials are as follows: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 700 ℃ to obtain an aluminum solution;
s3, cooling to 650 ℃, sequentially adding the rest raw materials into the aluminum solution under the stirring condition, removing slag after complete dissolution, and keeping the temperature for 30min to obtain aluminum alloy liquid; the specific cooling rate is 20 ℃/min; the stirring conditions are as follows: 8000r/min
S4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 730 ℃ to form an aluminum alloy ingot, slowly cooling, and keeping the vacuum state in the cooling process, wherein the vacuum degree is lower than 5 torr; the specific slow cooling speed is 5 ℃/min;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device; specifically, the high-pressure torsion device comprises a fixed upper die and a rotatable lower die, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are arranged oppositely to form a containing cavity, the disc-shaped aluminum alloy ingot can be placed in the containing cavity, and the pressure born by the disc-shaped aluminum alloy ingot is 1.2 GPa;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to 250 ℃, preserving heat for 1h, and cooling to room temperature to obtain a sample A2.
Example 3:
this example is for explaining the method of preparing the aluminum alloy for electric vehicle charging of the present invention,
the aluminum alloy comprises the following components in percentage by weight: 0.88% of Zn, Mn: 0.9%, Mg: 8.5%, Cr: 0.3%, Ni: 0.25%, Ti: 0.05%, trace elements: 0.3 percent of impurity elements, less than or equal to 0.5 percent of impurity elements and the balance of Al, wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 5:6: 2;
the method comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy; the method specifically comprises the following steps: the raw materials are as follows: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 720 ℃ to obtain an aluminum solution;
s3, cooling to 680 ℃, sequentially adding the rest raw materials into the aluminum solution under the stirring condition, slagging off after the rest raw materials are completely dissolved, and preserving heat for 40min to obtain aluminum alloy liquid; the specific cooling rate is 22 ℃/min; the stirring conditions are as follows: 10000 r/min;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 740 ℃ to form an aluminum alloy ingot, slowly cooling, and keeping the vacuum state in the cooling process, wherein the vacuum degree is lower than 5 torr; the specific slow cooling speed is 8 ℃/min;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device; specifically, the high-pressure torsion device comprises a fixed upper die and a rotatable lower die, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are arranged oppositely to form a containing cavity, the disc-shaped aluminum alloy ingot can be placed in the containing cavity, and the pressure born by the disc-shaped aluminum alloy ingot is 3.1 GPa;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to 300 ℃, preserving heat for 3 hours, and cooling to room temperature to obtain a sample A3.
Example 4:
this example is for explaining the method of preparing the aluminum alloy for electric vehicle charging of the present invention,
the aluminum alloy comprises the following components in percentage by weight: 0.65% of Zn, Mn: 0.82%, Mg: 9.0%, Cr: 0.2%, Ni: 0.22%, Ti: 0.05%, trace elements: 0.224 percent of impurity elements, less than or equal to 0.5 percent of impurity elements and the balance of Al, wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 6:2: 3;
the method comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy; the method specifically comprises the following steps: the raw materials are as follows: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 720 ℃ to obtain an aluminum solution;
s3, cooling to 660 ℃, sequentially adding the rest raw materials into the aluminum solution under the stirring condition, slagging off after the rest raw materials are completely dissolved, and preserving heat for 35min to obtain aluminum alloy liquid; the specific cooling rate is 25 ℃/min; the stirring conditions are as follows: 9000 r/min;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 740 ℃ to form an aluminum alloy ingot, slowly cooling, and keeping the vacuum state in the cooling process, wherein the vacuum degree is lower than 5 torr; the specific slow cooling speed is 6 ℃/min;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device; specifically, the high-pressure torsion device comprises a fixed upper die and a rotatable lower die, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are arranged oppositely to form a containing cavity, the disc-shaped aluminum alloy ingot can be placed in the containing cavity, and the pressure born by the disc-shaped aluminum alloy ingot is 4.5 GPa;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to 260 ℃, preserving heat for 2 hours, and cooling to room temperature to obtain a sample A4.
Example 5:
this example is for explaining the method of preparing the aluminum alloy for electric vehicle charging of the present invention,
the aluminum alloy comprises the following components in percentage by weight: 0.88% of Zn, Mn: 0.9%, Mg: 8.3%, Cr: 0.2%, Ni: 0.25%, Ti: 0.09%, trace elements: 0.35 percent of impurity elements, less than or equal to 0.5 percent of impurity elements and the balance of Al, wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 7:7: 1;
the method comprises the following steps:
s1, batching raw materials according to the components of the aluminum alloy; the method specifically comprises the following steps: the raw materials are as follows: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and microelement aluminum-based intermediate alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 740 ℃ to obtain an aluminum solution;
s3, cooling to 680 ℃, sequentially adding the rest raw materials into the aluminum solution under the stirring condition, slagging off after the rest raw materials are completely dissolved, and preserving heat for 50min to obtain aluminum alloy liquid; the specific cooling rate is 24 ℃/min; the stirring conditions are as follows: 12000 r/min;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 745 ℃ to form an aluminum alloy ingot, slowly cooling, and keeping the vacuum state in the cooling process, wherein the vacuum degree is lower than 5 torr; the specific slow cooling speed is 8 ℃/min;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device; specifically, the high-pressure torsion device comprises a fixed upper die and a rotatable lower die, the fixed upper die is provided with a first groove, the rotatable lower die is provided with a second groove, the first groove and the second groove are oppositely arranged to form a containing cavity, the disc-shaped aluminum alloy ingot can be placed in the containing cavity, and the pressure born by the disc-shaped aluminum alloy ingot is 1.2-5 Gpa;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to 340 ℃, preserving heat for 4 hours, and cooling to room temperature to obtain a sample A5.
Comparative example 1:
sample B1 of comparative example 1 was prepared using the method and starting materials of example 5, but with the exception that no trace elements were added.
Comparative example 2:
sample B2 of comparative example 2 was prepared using the method and starting materials of example 5, but with the exception that the microelements B, Re, and Zr were added in a ratio of 10:12:5 by mass percent.
Comparative example 3:
sample B3 of comparative example 3 was prepared using the procedure and starting materials of example 5, but with the exception that B was added as a single trace element.
Comparative example 4:
the starting material of example 5 was used, but the only difference was that in the preparation method, the disc-shaped aluminum alloy ingot was treated with a high-pressure twisting device and was not subjected to heat-holding treatment, to prepare sample B4 of comparative example 4.
Comparative example 5:
the starting material of example 5 was used, but the only difference was that in the preparation method, the disc-shaped aluminum alloy ingot was treated by a high pressure twisting device, heated to 100 ℃, and kept at the temperature for 10 hours, to prepare sample B5 of comparative example 5.
Comparative example 6:
the starting material of example 5 was used, but the only difference was that in the preparation method, the disc-shaped aluminum alloy ingot was heated to 350 ℃ after being treated by a high pressure twisting device, and was kept at the temperature for 6 hours, to prepare sample B6 of comparative example 6.
Comparative example 7:
the starting material of example 5 was used, but only different in that the disc-shaped aluminum alloy ingot was not treated with a high-pressure twisting device in the preparation method thereof, to prepare sample B7 of comparative example 7.
Test example 1:
the test examples were used to determine the mechanical properties at room temperature of the aluminum alloys obtained in examples 1 to 5 and comparative examples 1 to 7.
Referring to GB/T228.1-2010 Metal Material tensile test first part: the specific results of the tensile strength, yield strength and elongation of the aluminum alloy casting tested by the room temperature test method are shown in the table 1.
Table 1: mechanical properties
As can be seen from the analysis of the data in Table 1, the aluminum alloy samples prepared in examples 1 to 5 of the present invention have excellent mechanical properties and casting properties as compared with the aluminum alloy samples prepared in comparative examples 1 to 7, and the aluminum alloy on duty has a tensile strength of not less than 450MPa, a yield strength of not less than 320MPa, and an elongation of not less than 10%.
Test example 2:
the aluminum alloy prepared in example 5 and the aluminum alloys prepared in comparative examples 1 to 7 were evaluated in the plasticity and heat resistance tests, and the results are shown in table 2 below.
TABLE 2
(Note: A means Excellent; B means general; C means poor)
As can be seen from the analysis in table 2, the aluminum alloy prepared by the present invention has a fine average grain size and excellent plasticity and heat resistance, while the comparative example is generally inferior to the plasticity and heat resistance of the present invention, which shows that the addition of trace elements and the change of process parameters in the present invention have a certain influence on the plasticity and heat resistance of the prepared aluminum alloy.
Test example 3:
the yields of the tests in examples 1-5 and comparative examples 1-7 were recorded, with 100 samples tested per group, and the results are shown in table 3 below.
Table 3:
| group of | Yield of finished products% |
| Sample A1 | 95 |
| Sample A2 | 96 |
| Sample A3 | 99 |
| Sample A4 | 98 |
| Sample A5 | 97 |
| Sample B1 | 75 |
| Sample B2 | 77 |
| Sample B3 | 60 |
| Sample B4 | 82 |
| Sample B5 | 79 |
| Sample B6 | 67 |
| Sample B7 | 69 |
As can be seen from the data analysis in table 3, the yield in the present invention is more than 95%, but the yield in the comparative example is low, which indicates that the preparation process of the present invention is useful for increasing the yield of aluminum alloys for electric vehicle charging.
In sum, the prepared aluminum alloy also has excellent mechanical properties and stability, the component proportion of trace elements is particularly limited by optimizing the components, the component proportion and the preparation process of the aluminum alloy, and the fluidity, plasticity, heat resistance and yield of a melt are increased while crystals are refined.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. The aluminum alloy applied to electric vehicle charging is characterized by comprising the following components in percentage by weight: 0.25 to 1.38% of Zn, Mn: 0.5-1.1%, Mg: 7.5-9.5%, Cr: 0.04-0.5%, Ni: 0.1-0.4%, Ti: 0.01-0.15%, trace elements: 0.1-0.5%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the electric vehicle charging is 40-60 nm.
2. The aluminum alloy for electric vehicle charging as claimed in claim 1, wherein the aluminum alloy comprises the following components in percentage by weight: 0.55-1.12% of Zn, Mn: 0.8-1.0%, Mg: 8.0-9.0%, Cr: 0.1-0.4%, Ni: 0.2-0.3%, Ti: 0.03-0.12%, trace elements: 0.2-0.4%, impurity elements less than or equal to 0.5%, and the balance of Al;
and the average grain size of the aluminum alloy applied to the charging of the electric vehicle is dTEM and is 45-55 nm.
3. The aluminum alloy for electric vehicle charging according to claim 1, wherein the trace elements are B, Re and Zr, and the mass percentage ratio of B, Re and Zr is 1-8:1-10: 1-3. .
4. The aluminum alloy for use in electric vehicle charging as recited in claim 1, wherein the impurity element is Fe < 0.05%, Si < 0.03%, Cu < 0.05%.
5. A method for preparing the aluminum alloy for electric vehicle charging as recited in any one of claims 1 to 4, comprising the steps of:
s1, batching raw materials according to the components of the aluminum alloy;
s2, adding the pure aluminum ingot into a smelting furnace, and heating to 700-750 ℃ to obtain an aluminum solution;
s3, cooling to 650-;
s4, performing semi-continuous casting on the aluminum alloy liquid at the casting temperature of 730-750 ℃ to form an aluminum alloy ingot, slowly cooling, keeping the vacuum state in the cooling process, and keeping the vacuum degree below 5 torr;
s5, processing the cooled aluminum alloy cast ingot into a disc shape, and placing the disc-shaped aluminum alloy cast ingot in a high-pressure torsion device;
s6, slowly heating the disc-shaped aluminum alloy ingot subjected to the step S5 to the temperature of 250-350 ℃, preserving heat for 1-5 hours, and cooling to the room temperature to obtain the aluminum alloy applied to electric vehicle charging.
6. The method for preparing an aluminum alloy for use in charging electric vehicles according to claim 5, wherein the raw materials in S1 are: zn ingot, AlMn alloy, Mg ingot with the purity of 99.9 percent, Al ingot, AlCr, AlNi, Ti ingot and trace element aluminum-based intermediate alloy.
7. The method for manufacturing an aluminum alloy for electric vehicle charging according to claim 5, wherein the rate of temperature decrease in S3 is 20-25 ℃/min; the stirring conditions are as follows: 8000- & ltSUB & gt 15000 r/min.
8. The method for preparing an aluminum alloy for use in charging electric vehicles according to claim 5, wherein the slow cooling rate in S4 is 5-10 ℃/min.
9. The method for preparing an aluminum alloy for use in charging electric vehicles according to claim 5, wherein the disk-shaped aluminum alloy ingot in S5 is subjected to a pressure of 1.2-5 GPa.
10. The method as claimed in claim 5, wherein the high voltage twisting device in S5 comprises a fixed upper mold having a first groove, and a rotatable lower mold having a second groove, wherein the first groove and the second groove are oppositely disposed to form a containing cavity, and the disc-shaped aluminum alloy ingot can be placed in the containing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748437.9A CN111850359A (en) | 2020-07-30 | 2020-07-30 | Aluminum alloy applied to electric vehicle charging and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748437.9A CN111850359A (en) | 2020-07-30 | 2020-07-30 | Aluminum alloy applied to electric vehicle charging and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111850359A true CN111850359A (en) | 2020-10-30 |
Family
ID=72946196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010748437.9A Pending CN111850359A (en) | 2020-07-30 | 2020-07-30 | Aluminum alloy applied to electric vehicle charging and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111850359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113430426A (en) * | 2021-06-07 | 2021-09-24 | 江苏大学 | High-strength low-magnesium Al-Mg aluminum alloy material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02159339A (en) * | 1988-12-12 | 1990-06-19 | Furukawa Alum Co Ltd | Aluminum alloy for magnetic disk base having excellent specular finishing properties |
| CA2370160C (en) * | 1999-05-04 | 2004-12-07 | Corus Aluminium Walzprodukte Gmbh | Exfoliation resistant aluminium-magnesium alloy |
| CN102816957A (en) * | 2012-08-18 | 2012-12-12 | 佛山金兰铝厂有限公司 | Aluminum alloy decorative lighting material and method for producing aluminum alloy circular tube by using the same |
| CN105543587A (en) * | 2015-11-20 | 2016-05-04 | 江苏大学 | Ultrahigh-strength nano-crystalline Al-Mg aluminum alloy material and preparation method thereof |
| CN105734363A (en) * | 2016-04-27 | 2016-07-06 | 贵州航天风华精密设备有限公司 | Forming method of aluminum magnesium alloy component |
-
2020
- 2020-07-30 CN CN202010748437.9A patent/CN111850359A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02159339A (en) * | 1988-12-12 | 1990-06-19 | Furukawa Alum Co Ltd | Aluminum alloy for magnetic disk base having excellent specular finishing properties |
| CA2370160C (en) * | 1999-05-04 | 2004-12-07 | Corus Aluminium Walzprodukte Gmbh | Exfoliation resistant aluminium-magnesium alloy |
| CN102816957A (en) * | 2012-08-18 | 2012-12-12 | 佛山金兰铝厂有限公司 | Aluminum alloy decorative lighting material and method for producing aluminum alloy circular tube by using the same |
| CN105543587A (en) * | 2015-11-20 | 2016-05-04 | 江苏大学 | Ultrahigh-strength nano-crystalline Al-Mg aluminum alloy material and preparation method thereof |
| CN105734363A (en) * | 2016-04-27 | 2016-07-06 | 贵州航天风华精密设备有限公司 | Forming method of aluminum magnesium alloy component |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113430426A (en) * | 2021-06-07 | 2021-09-24 | 江苏大学 | High-strength low-magnesium Al-Mg aluminum alloy material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108330354B (en) | high-strength aluminum alloy for electronic equipment and preparation and extrusion methods thereof | |
| CN110714148A (en) | High-performance semi-solid die-casting aluminum alloy and preparation method thereof | |
| CN109487134B (en) | High-strength aluminum alloy for electronic product appearance part and preparation method thereof | |
| CN112522645B (en) | Preparation method of high-strength high-toughness homogeneous fine-grain CrCoNi intermediate-entropy alloy thin plate | |
| CN112831697A (en) | High-strength coarse-grain-free aluminum alloy and preparation method and application thereof | |
| CN111057912B (en) | Process for reducing recrystallization temperature of 3003 aluminum alloy | |
| CN109778027A (en) | A kind of high intensity A356 alloy and preparation method thereof | |
| CN108118225A (en) | A kind of low cost high-voltage contracting strength and deformation magnesium alloy and preparation method thereof | |
| CN115852214A (en) | Heat-treatable reinforced high-strength and high-toughness aluminum alloy and preparation method thereof | |
| CN113857250B (en) | Method for preparing metal semi-solid slurry by multistage rolling-annealing SIMA method | |
| CN112853172B (en) | Ultralow-density aluminum-lithium alloy and preparation method thereof | |
| CN111850359A (en) | Aluminum alloy applied to electric vehicle charging and preparation method thereof | |
| CN113046646A (en) | High-strength low-density dual-phase steel and preparation method thereof | |
| CN112921208A (en) | Preparation method of Al-Mg-Si series aluminum alloy plate with high forming performance | |
| WO2019023818A1 (en) | Readily cold-formable deformable zinc alloy material, preparation method therefor, and application thereof | |
| CN108130466A (en) | A kind of multielement complex intensifying high-strength and low-cost magnesium alloy and preparation method thereof | |
| CN115261668B (en) | Brass alloy strip and preparation method thereof | |
| CN114807694B (en) | High fracture toughness aluminum alloy for doors and windows and manufacturing method thereof | |
| WO2023015608A1 (en) | High strength, high conductivity, intergranular corrosion-resistant aluminum alloy and preparation method therefor | |
| CN114908265A (en) | Preparation method of TiNiAlV quaternary alloy filament | |
| CN114686735A (en) | Wrought aluminum alloy with gradient structure and preparation method thereof | |
| CN114525421A (en) | Magnesium alloy and preparation method and application thereof | |
| JPH04235262A (en) | Manufacture of ti-al intermetallic compound-series ti alloy excellent in strength and ductility | |
| CN111910109A (en) | Aluminum alloy section for corrosion-resistant high-strength automobile and motorcycle accessory and preparation method thereof | |
| CN115433860B (en) | High-performance heat-resistant extrusion rare earth aluminum alloy and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |
|
| RJ01 | Rejection of invention patent application after publication |