A high-performance aluminum alloy material, its preparation process, and its application in the production of thermostat housings.

Abstract

The present invention discloses a high-performance aluminum alloy material, a preparation process thereof and an application thereof in the production of a thermostat housing. The aluminum alloy material comprises the following raw materials in percentage by mass: Mg 0.4 - 0.7%, Mn 0.3 - 0.4%, Cu 0.15 - 0.38%, Zn 0.1 - 0.2%, Ti 0.2 - 0.3%, Si 0.9 - 1.2%, Fe 0.02 - 0.06%, Ni 0.08 - 0.2%, Y < 0.07%, Sn < 0.2%, Sr 0.01 - 0.04%, V 0.03 - 0.09%, Ce 0.01 - 0.06%, Re 0.01 - 0.1%, 0.05% < Y + Sn + Sr < 0.25%, and the balance is Al. In the raw materials of the present invention, the added V, Sr and Re play a synergistic promoting role, synergistically improving the mechanical properties and corrosion resistance of the aluminum alloy material.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy materials, specifically relating to a high-performance aluminum alloy material, its preparation process, and its application in the production of thermostat seats. Background Technology

[0002] Aluminum alloys are increasingly widely used in the automotive industry. Compared to traditional steel, aluminum alloys have lower density, better machinability, and higher strength, making them one of the preferred materials in the automotive manufacturing industry. The characteristics of aluminum alloys include: 1. Lower density: The density of aluminum alloys is only about one-third that of steel, thus effectively reducing the overall weight of automobiles and improving fuel economy and driving performance. 2. Good machinability: Aluminum alloys have excellent plasticity and forgeability, allowing for the manufacture of complex-shaped automotive parts through various processing techniques such as die casting, extrusion, and forging. 3. Higher strength: Despite their lower density, aluminum alloys possess strength that meets or exceeds that of some traditional materials, such as cast iron and copper alloys. This enables aluminum alloys to meet the strength requirements of automotive parts. 4. Good corrosion resistance: Aluminum alloys have good corrosion resistance, allowing for long-term use in harsh environments and extending the service life of automobiles.

[0003] Aluminum alloys are primarily used in automotive body structures, engine components, suspension systems, braking systems, battery casings, and interior trim. With technological advancements, the manufacturing processes for aluminum alloys will continue to improve, making them better suited to the demands of automotive manufacturing. For example, employing advanced welding techniques can enhance the connection strength of aluminum alloys, increasing their application in automotive structures. Researchers are constantly developing new aluminum alloy materials to improve their strength, corrosion resistance, and heat resistance. The research and development of new aluminum alloys will further promote the application of aluminum alloys in automobiles.

[0004] An automotive thermostat is a valve that controls the flow path of engine coolant. This product automatically adjusts the amount of coolant entering the radiator based on the coolant temperature to ensure the engine operates within a suitable temperature range, thus saving energy. Currently, the materials used for thermostat seats are required to possess strong high-temperature resistance, corrosion resistance, and good pressure resistance.

[0005] Patent CN202110570435.X discloses a method for preparing aluminum alloy materials for automobiles. The ingot uses Zn, Mg, and Cu as the main alloying elements, with Zr, Cr, Yb, Ag, Li, Sn, and Ti added in combination. This results in an aluminum alloy material with high strength and good toughness, but it does not meet the performance requirements of aluminum alloy materials for thermostat seats. Therefore, there is a need to provide an aluminum alloy material that can be used to produce thermostat seats. Summary of the Invention

[0006] The present invention provides a high-performance aluminum alloy material, a preparation process thereof, and an application thereof in the production of a thermostat housing, so as to improve the strength, corrosion resistance, and heat resistance of the thermostat housing.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A high-performance aluminum alloy material, the aluminum alloy material comprises the following raw materials in mass percentage: Mg 0.4 - 0.7%, Mn 0.3 - 0.4%, Cu 0.15 - 0.38%, Zn 0.1 - 0.2%, Ti 0.2 - 0.3%, Si 0.9 - 1.2%, Fe 0.02 - 0.06%, Ni 0.08 - 0.2%, Y < 0.07, Sn < 0.2%, Sr 0.01 - 0.04%, V 0.03 - 0.09%, Ce 0.01 - 0.06%, Re 0.01 - 0.1%, 0.05% < Y + Sn + Sr < 0.25%, 0.06% < V + Sr + Re < 0.2%, and the balance is Al and impurity elements that cannot be removed.

[0009] Preferably, the aluminum alloy material comprises the following raw materials in mass percentage: Mg 0.6%, Mn 0.35%, Cu 0.22%, Zn 0.15%, Ti 0.25%, Si 1.1%, Fe 0.04%, Ni 0.15%, Y 0.05%, Sn 0.1%, Sr 0.03%, V 0.06%, Ce 0.04%, Re 0.07%, and the balance is Al and impurity elements that cannot be removed.

[0010] Preferably, the content of a single element in the impurity elements that cannot be removed is not more than 0.01%, and the total content of the impurity elements that cannot be removed is not more than 0.08%.

[0011] The present invention also provides a preparation process of the high-performance aluminum alloy material, comprising the following steps:

[0012] Step 1: Weigh pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0013] Step 2: Vacuum melt the pure metal ingots and alloy ingots to obtain a pre-alloy ingot;

[0014] Step 3: Subject the pre-alloy ingot to refining, casting, homogenization treatment, hot extrusion, plastic deformation, solution treatment, and aging treatment to obtain the aluminum alloy material.

[0015] Preferably, Step 2 further comprises putting the weighed aluminum ingot into the crucible of a vacuum medium-frequency induction furnace, evacuating, heating to 730 - 750 °C and filling with argon to make the furnace in a positive pressure environment; then adding other pure metal ingots and / or alloy ingots, and after all the metals are completely melted, degassing, stirring, and pouring to obtain the pre-alloy ingot.

[0016] Preferably, the stirring speed is 220-260 r / min.

[0017] Preferably, the homogenization treatment temperature in step 3 is 420-460℃, and the heat preservation time is 24-36h.

[0018] Preferably, in step 3, the temperature during hot extrusion is 500-550℃, the extrusion ratio is 10-20, and the extrusion rate is 10-20 m / min.

[0019] Preferably, in step 3, the solution treatment involves holding the solution at 550°C for 60 minutes, followed by water quenching in a 10% NaCl melt at room temperature until the solution reaches room temperature.

[0020] The present invention also provides an application of a high-performance aluminum alloy material in the production of thermostat housings.

[0021] The present invention has the following beneficial effects:

[0022] (1) The aluminum alloys of the present invention have a tensile strength of ≥555.6MPa, an elongation of ≥15.8%, and a salt spray corrosion rate of ≥0.0139g / m. 2 Below .d, it is evident that both mechanical properties and corrosion resistance are excellent. From Example 1 and Comparative Examples 1-4, it is clear that when V, Sr, and Re are lacking in Comparative Example 1, and when one of V, Sr, or Re is lacking in Comparative Examples 2-4 respectively, their corrosion resistance and mechanical properties are lower than those of Example 1 containing V, Sr, and Re. The data from Example 1 and Comparative Examples 1-4 show that V, Sr, and Re play a synergistic role in the preparation of high-performance aluminum alloy materials, synergistically improving the mechanical properties and corrosion resistance of these materials. This may be due to:

[0023] Adding vitamin V to aluminum alloys allows V to react with Al to form insoluble compounds such as VAl7, which refines the grain size during casting. V also refines the recrystallization structure and increases the casting temperature, thus improving the alloy's mechanical properties. In Al-Cu alloys, adding an appropriate amount of V significantly increases the tensile strength and elongation. Sr is commonly used in the modification treatment of aluminum alloys, usually added in the form of Al-Sr master alloys, which can significantly improve the performance of casting alloys. Adding Sr to aluminum alloys can significantly refine the microstructure of the as-cast alloy. In Al-Si alloys, adding Sr refines the Al-Fe-Si intermetallic compounds, increasing tensile strength. In Al-Si-Mg alloys, the modification effect intensifies with increasing Sr content, and the alloy's tensile strength continuously increases. Because Sr modifiers promote uniform distribution of elements in the alloy, the compositional differences between grain boundaries, internal grain boundaries, and the interior are smaller, improving the alloy's corrosion resistance. Re (re) can effectively refine grains and reduce dendrite spacing, thus achieving a modification effect. Due to its high chemical reactivity, Re can react with various impurities to form compounds, thereby improving inclusion morphology and removing gases and harmful alloying elements from aluminum alloys. Simultaneously, Re can undergo micro-alloying with Al and other alloying elements, thus modifying the aluminum alloy. Adding Re to Al-Si alloys results in a more significant reduction in eutectic silicon size and a deeper degree of spheroidization. Regarding the corrosion resistance of aluminum alloys, Re can alter the eutectic silicon morphology in Al-Si alloys and promote a more uniform distribution of intermetallic compounds, thereby improving corrosion resistance. Therefore, adding an appropriate amount of Re to aluminum alloys can significantly improve their mechanical strength, wear resistance, and corrosion resistance.

[0024] (2) The patent CN202110570435.X cited in the background art discloses a method for preparing aluminum alloy materials for automobiles. In its ingot, Zn, Mg, and Cu are the main alloying elements, and Zr, Cr, Yb, Ag, Li, Sn, and Ti are added in combination to make the aluminum alloy material have high strength and good toughness, but it does not meet the performance requirements of the thermostat seat for aluminum alloy materials. Based on the above technical problems, the present invention further optimizes and improves the raw materials of the invention. After multiple experimental studies, it was found that V, Sr, and Re added to the raw materials have a synergistic promoting effect. V can react with Al to form insoluble compounds such as VAl7, which can play a role in refining the grains during the casting process; the addition of Sr to Al-Si alloy refines the Al-Fe-Si intermetallic compounds and improves the tensile strength; the Re element can change the eutectic silicon morphology of Al-Si alloy and make the intermetallic compounds uniformly distributed, thereby improving the corrosion resistance. This solves the technical problems mentioned in the background art document and produces unexpected effects. Attached Figure Description

[0025] Figure 1The thermostat housing diagram produced from the high-performance aluminum alloy material prepared in Application Example 1. Detailed implementation method

[0026] To better understand the present invention, it is illustrated by the following examples. These examples fall within the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0027] In the example, for the high-performance aluminum alloy material, the aluminum alloy material includes the following raw materials in mass percentage: Mg 0.4 - 0.7%, Mn 0.3 - 0.4%, Cu 0.15 - 0.38%, Zn 0.1 - 0.2%, Ti 0.2 - 0.3%, Si 0.9 - 1.2%, Fe 0.02 - 0.06%, Ni 0.08 - 0.2%, Y < 0.07%, Sn < 0.2%, Sr 0.01 - 0.04%, V 0.03 - 0.09%, Ce 0.01 - 0.06%, Re 0.01 - 0.1%, 0.05% < Y + Sn + Sr < 0.25%, 0.06% < V + Sr + Re < 0.2%, and the balance is Al and impurity elements that cannot be removed. The content of each single element in the impurity elements that cannot be removed is not more than 0.01%, and the total content of the impurity elements that cannot be removed is not more than 0.08%.

[0028] A preparation process for a high-performance aluminum alloy material, comprising the following steps:

[0029] Step 1: Weigh pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0030] Step 2: Vacuum melt the pure metal ingots and alloy ingots. Put the weighed aluminum ingot into the crucible of a vacuum medium-frequency induction furnace, evacuate, heat to 730 - 750 °C and fill with argon to make the furnace in a positive pressure environment; then add other pure metal ingots and / or alloy ingots. After all the metals are completely melted, degas and stir, with the stirring speed being 220 - 260 r / min, and pour to obtain a pre-alloy ingot;

[0031] Step 3: Subject the pre-alloy ingot to refining, casting, homogenization treatment, hot extrusion, plastic deformation, solution treatment and aging treatment. The temperature of the homogenization treatment is 420 - 460 °C, and the holding time is 24 - 36 h; the temperature during hot extrusion is 500 - 550 °C, the extrusion ratio is 10 - 20, and the extrusion rate is 10 - 20 m / min; the solution treatment is to hold at 550 °C for 60 min, and then place it in a 10% NaCl melt at room temperature for water quenching to room temperature to obtain the aluminum alloy material.

[0032] To make the disclosure of the present invention more sufficient, it is further illustrated by more specific examples below.

[0033] Example 1

[0034] A high-performance aluminum alloy material, comprising, by mass percentage, the following raw materials: Mg 0.6%, Mn 0.35%, Cu 0.22%, Zn 0.15%, Ti 0.25%, Si 1.1%, Fe 0.04%, Ni 0.15%, Y 0.05%, Sn 0.1%, Sr 0.03%, V 0.06%, Ce 0.04%, Re 0.07%, with the remainder being Al and non-removable impurity elements. The content of any single non-removable impurity element is no more than 0.01%, and the total content of all non-removable impurities is no more than 0.08%.

[0035] A process for preparing a high-performance aluminum alloy material includes the following steps:

[0036] Step 1: Weigh out pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0037] Step 2: By vacuum melting pure metal ingots and alloy ingots, the weighed aluminum ingots are placed in the crucible of a vacuum medium-frequency induction furnace, a vacuum is drawn, the furnace is heated to 740°C and filled with argon to create a positive pressure environment; then other pure metal ingots and / or alloy ingots are added, and after all the metals have completely melted, the furnace is degassed, stirred at a stirring speed of 250 r / min, and then cast to obtain a pre-alloyed ingot.

[0038] Step 3: The pre-alloyed ingot undergoes refining, casting, homogenization, hot extrusion, plastic deformation, solution treatment, and aging treatment. The homogenization treatment is performed at 440℃ for 28 hours. The hot extrusion is performed at 520℃ with an extrusion ratio of 15 and an extrusion rate of 15 m / min. The solution treatment involves holding the ingot at 550℃ for 60 minutes, followed by water quenching in a 10% NaCl melt at room temperature until room temperature is reached, yielding an aluminum alloy material. This aluminum alloy material is then used to produce a thermostat seat, such as... Figure 1 As shown.

[0039] Example 2

[0040] A high-performance aluminum alloy material, comprising, by mass percentage, the following raw materials: Mg 0.7%, Mn 0.4%, Cu 0.38%, Zn 0.1%, Ti 0.2%, Si 0.9%, Fe 0.02%, Ni 0.08%, Y 0.06%, Sn 0.18%, Sr 0.04%, V 0.06%, Ce 0.05%, Re 0.07%, with the remainder being Al and non-removable impurity elements. The content of any single non-removable impurity element is no more than 0.01%, and the total content of all non-removable impurities is no more than 0.08%.

[0041] A process for preparing a high-performance aluminum alloy material includes the following steps:

[0042] Step 1: Weigh out pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0043] Step 2: Vacuum melting of pure metal ingots and alloy ingots. Weighed aluminum ingots are placed in the crucible of a vacuum medium-frequency induction furnace, vacuum is drawn, heated to 750°C, and argon is introduced to create a positive pressure environment inside the furnace; then other pure metal ingots and / or alloy ingots are added. After all the metals have completely melted, the furnace is degassed, stirred at a stirring speed of 220 r / min, and then cast to obtain a pre-alloyed ingot.

[0044] Step 3: The pre-alloyed ingot is refined, cast, homogenized, hot extruded, plastically deformed, solution treated, and aged. The homogenization treatment is carried out at a temperature of 430℃ for 30 hours. The hot extrusion is carried out at a temperature of 550℃, an extrusion ratio of 20, and an extrusion rate of 10 m / min. The solution treatment is carried out at 550℃ for 60 minutes, and then the ingot is placed in a 10% NaCl melt at room temperature for water quenching to room temperature to obtain the aluminum alloy material.

[0045] Example 3

[0046] A high-performance aluminum alloy material, comprising, by mass percentage, the following raw materials: Mg 0.4%, Mn 0.3%, Cu 0.15%, Zn 0.16%, Ti 0.28%, Si 1.15%, Fe 0.05%, Ni 0.17%, Y 0.05%, Sn 0.16%, Sr 0.01%, V 0.09%, Ce 0.06%, Re 0.1%, with the remainder being Al and non-removable impurity elements. The content of any single non-removable impurity element is no more than 0.01%, and the total content of all non-removable impurities is no more than 0.08%.

[0047] A process for preparing a high-performance aluminum alloy material includes the following steps:

[0048] Step 1: Weigh out pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0049] Step 2: Vacuum melting of pure metal ingots and alloy ingots. Weighed aluminum ingots are placed in the crucible of a vacuum medium-frequency induction furnace, vacuum is drawn, heated to 730°C, and argon is introduced to create a positive pressure environment inside the furnace; then other pure metal ingots and / or alloy ingots are added. After all metals have completely melted, the furnace is degassed, stirred at a stirring speed of 240 r / min, and then cast to obtain a pre-alloyed ingot.

[0050] Step 3: The pre-alloyed ingot is refined, cast, homogenized, hot extruded, plastically deformed, solution treated, and aged. The homogenization treatment is carried out at a temperature of 460℃ for 36 hours. The hot extrusion is carried out at a temperature of 500℃, an extrusion ratio of 10, and an extrusion rate of 18 m / min. The solution treatment is carried out at 550℃ for 60 minutes, and then the ingot is placed in a 10% NaCl melt at room temperature for water quenching to room temperature to obtain the aluminum alloy material.

[0051] Example 4

[0052] A high-performance aluminum alloy material, comprising, by mass percentage, the following raw materials: Mg 0.5%, Mn 0.38%, Cu 0.26%, Zn 0.2%, Ti 0.3%, Si 1.2%, Fe 0.06%, Ni 0.2%, Y 0.065%, Sn 0.17%, Sr 0.02%, V 0.03%, Ce 0.01%, Re 0.01%, with the remainder being Al and non-removable impurity elements. The content of any single non-removable impurity element is no more than 0.01%, and the total content of all non-removable impurities is no more than 0.08%.

[0053] A process for preparing a high-performance aluminum alloy material includes the following steps:

[0054] Step 1: Weigh out pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio;

[0055] Step 2: Vacuum melting of pure metal ingots and alloy ingots. Weighed aluminum ingots are placed in the crucible of a vacuum medium-frequency induction furnace, vacuum is drawn, heated to 740°C, and argon is introduced to create a positive pressure environment inside the furnace; then other pure metal ingots and / or alloy ingots are added. After all metals have completely melted, the furnace is degassed, stirred at a stirring speed of 260 r / min, and then cast to obtain a pre-alloyed ingot.

[0056] Step 3: The pre-alloyed ingot is refined, cast, homogenized, hot extruded, plastically deformed, solution treated, and aged. The homogenization treatment is carried out at a temperature of 420℃ for 24 hours. The hot extrusion is carried out at a temperature of 530℃, an extrusion ratio of 18, and an extrusion rate of 20 m / min. The solution treatment is carried out at 550℃ for 60 minutes, and then the ingot is placed in a 10% NaCl melt at room temperature for water quenching to room temperature to obtain the aluminum alloy material.

[0057] Comparative Example 1

[0058] The preparation process is basically the same as that in Example 1, except that V, Sr, and Re are missing from the raw materials used to prepare the high-performance aluminum alloy material.

[0059] Comparative Example 2

[0060] The preparation process is basically the same as that in Example 1, except that the raw materials for preparing high-performance aluminum alloy materials lack V.

[0061] Comparative Example 3

[0062] The preparation process is basically the same as that in Example 1, except that Sr is missing in the raw materials for preparing high-performance aluminum alloy materials.

[0063] Comparative Example 4

[0064] The preparation process is basically the same as that in Example 1, except that Re is missing in the raw materials for preparing high-performance aluminum alloy materials.

[0065] The high-performance aluminum alloys prepared in Examples 1-4 and Comparative Examples 1-4 were subjected to room temperature tensile mechanical property tests and corrosion resistance tests. The room temperature tensile tests were conducted on a SANS-100kN micro-controlled electronic universal testing machine at a tensile speed of 1 mm / min. Salt spray corrosion resistance tests were conducted according to the GB / T10125-NSS / AASS / CAS standard method for alternating salt spray testing. The test medium was a 5% NaCl solution with a pH of 6.5-7.2, and the chamber temperature was controlled at (35±2)℃. Three alloy samples were repeatedly tested for each alloy, and the average value was taken. The results are shown in the table below.

[0066] Experimental Project Tensile strength (MPa) Elongation (%) <![CDATA[Salt spray corrosion rate (g / m 2 .d)]]> Example 1 576.2 16.5 0.0122 Example 2 565.6 16.2 0.0131 Example 3 571.8 15.8 0.0139 Example 4 555.6 16.0 0.0126 Comparative Example 1 412.2 11.5 0.0231 Comparative Example 2 521.3 15.1 0.0152 Comparative Example 3 530.1 14.8 0.0145 Comparative Example 4 536.4 15.2 0.0161

[0067] As can be seen from the table above: (1) As can be seen from the data of Examples 1-4, Example 1 is the optimal example; the lack of V, Sr and Re in the raw materials for preparing high-performance aluminum alloy materials has a significant impact on the mechanical properties and corrosion resistance of high-performance aluminum alloy materials. The tensile strength of the aluminum alloy of the present invention is above 555.6 MPa, the elongation is above 15.8%, and the salt spray corrosion rate is 0.0139 g / m. 2 Below .d, it can be seen that the mechanical properties and corrosion resistance are both superior. As can be seen from Example 1 and Comparative Examples 1-4, when V, Sr, and Re are missing in Comparative Example 1, and when one of V, Sr, and Re is missing in Comparative Examples 2-4 respectively, the corrosion resistance and mechanical properties are lower than those of Example 1 containing V, Sr, and Re.

[0068] (2) As can be seen from the data of Example 1 and Comparative Examples 1-4, V, Sr, and Re play a synergistic role in the preparation of high-performance aluminum alloy materials, synergistically improving the mechanical properties and corrosion resistance of high-performance aluminum alloy materials. This may be because:

[0069] Adding vitamin V to aluminum alloys allows V to react with Al to form insoluble compounds such as VAl7, which refines the grain size during casting. V also refines the recrystallization structure and increases the casting temperature, thus improving the alloy's mechanical properties. In Al-Cu alloys, adding an appropriate amount of V significantly increases the tensile strength and elongation. Sr is commonly used in the modification treatment of aluminum alloys, usually added in the form of Al-Sr master alloys, which can significantly improve the performance of casting alloys. Adding Sr to aluminum alloys can significantly refine the microstructure of the as-cast alloy. In Al-Si alloys, adding Sr refines the Al-Fe-Si intermetallic compounds, increasing tensile strength. In Al-Si-Mg alloys, the modification effect intensifies with increasing Sr content, and the alloy's tensile strength continuously increases. Because Sr modifiers promote uniform distribution of elements in the alloy, the compositional differences between grain boundaries, internal grain boundaries, and the interior are smaller, improving the alloy's corrosion resistance. Re (re) can effectively refine grains and reduce dendrite spacing, thus achieving a modification effect. Due to its high chemical reactivity, Re can react with various impurities to form compounds, thereby improving inclusion morphology and removing gases and harmful alloying elements from aluminum alloys. Simultaneously, Re can undergo micro-alloying with Al and other alloying elements, thus modifying the aluminum alloy. Adding Re to Al-Si alloys results in a more significant reduction in eutectic silicon size and a deeper degree of spheroidization. Regarding the corrosion resistance of aluminum alloys, Re can alter the eutectic silicon morphology in Al-Si alloys and promote a more uniform distribution of intermetallic compounds, thereby improving corrosion resistance. Therefore, adding an appropriate amount of Re to aluminum alloys can significantly improve their mechanical strength, wear resistance, and corrosion resistance.

[0070] The above content should not be construed as limiting the specific implementation of this invention to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this invention, and all such deductions or substitutions should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A high-performance aluminum alloy material, characterized in that, The aluminum alloy material comprises the following raw materials in mass percentage: Mg 0.4 - 0.7%, Mn 0.3 - 0.4%, Cu 0.15 - 0.38%, Zn 0.1 - 0.2%, Ti 0.2 - 0.3%, Si 0.9 - 1.2%, Fe 0.02 - 0.06%, Ni 0.08 - 0.2%, Y < 0.07, Sn < 0.2%, Sr 0.01 - 0.04%, V 0.03 - 0.09%, Ce 0.01 - 0.06%, Re 0.01 - 0.1%, 0.05% < Y + Sn + Sr < 0.25%, 0.06% < V + Sr + Re < 0.2%, and the balance is Al and impurity elements that cannot be removed.

2. The high-performance aluminum alloy material according to claim 1, characterized in that, The aluminum alloy material comprises the following raw materials in mass percentage: Mg 0.6%, Mn 0.35%, Cu 0.22%, Zn 0.15%, Ti 0.25%, Si 1.1%, Fe 0.04%, Ni 0.15%, Y 0.05%, Sn 0.1%, Sr 0.03%, V 0.06%, Ce 0.04%, Re 0.07%, and the balance is Al and impurity elements that cannot be removed.

3. The high-performance aluminum alloy material according to claim 1 or 2, characterized in that, The content of each single element in the impurity elements that cannot be removed is not more than 0.01%, and the total content of the impurity elements that cannot be removed is not more than 0.08%.

4. A preparation process for a high-performance aluminum alloy material according to any one of claims 1-3, characterized in that, It includes the following steps: Step 1: Weigh pure metal ingots and / or alloy ingots according to the aluminum alloy composition ratio. Step 2: Vacuum melt the pure metal ingots and alloy ingots to obtain a pre-alloy ingot. Step 3: Subject the pre-alloy ingot to refining, casting, homogenization treatment, hot extrusion, plastic deformation, solution treatment and aging treatment to obtain the aluminum alloy material.

5. The preparation process of the high-performance aluminum alloy material according to claim 4, characterized in that, Step 2 further includes putting the weighed aluminum ingot into the crucible of a vacuum medium-frequency induction furnace, evacuating the air, heating to 730 - 750 °C and filling with argon to make the furnace in a positive pressure environment; then adding other pure metal ingots and / or alloy ingots, and after all metals are completely melted, degassing, stirring and pouring to obtain the pre-alloy ingot.

6. The preparation process of the high-performance aluminum alloy material according to claim 5, characterized in that, The stirring speed is 220 - 260 r / min.

7. The preparation process of the high-performance aluminum alloy material according to claim 4, characterized in that, In Step 3, the temperature of the homogenization treatment is 420 - 460 °C, and the heat preservation time is 24 - 36 h.

8. The preparation process of the high-performance aluminum alloy material according to claim 4, characterized in that, In Step 3, the temperature during hot extrusion is 500 - 550 °C, the extrusion ratio is 10 - 20, and the extrusion rate is 10 - 20 m / min.

9. The preparation process of the high-performance aluminum alloy material according to claim 4, characterized in that, The solution treatment in Step 3 is to keep the temperature at 550 °C for 60 min, and then place it in a 10% NaCl melt at room temperature for water quenching to room temperature.

10. The application of a high-performance aluminum alloy material prepared by the preparation process according to any one of claims 4-9, characterized in that, The application of the high-performance aluminum alloy material in the production of thermostat seats.

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