A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method

Abstract

This invention relates to a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method. The alloy's chemical composition by mass percentage is: Si 4.77–6.70%, Mg 8.23–11.40%, Cu 0.1–0.5%, Ti ≤0.1%, and the total content of P, Sr, and Nd is between 0.01% and 0.20%, with the remainder being Al and unavoidable impurities. The alloy of this invention is prepared through fine-grain strengthening treatment, casting, solution treatment, and large-deformation rolling. The combination of asynchronous and synchronous rolling significantly improves the alloy's mechanical properties. The prepared aluminum alloy exhibits superior performance in terms of yield strength, tensile strength, and elongation, with a yield strength reaching 180 MPa, a tensile strength reaching 220 MPa, and a total elongation of not less than 4.0%. Furthermore, the alloy has a uniform grain structure, with well-distributed Mg2Si particles, further enhancing its wear resistance. This alloy is suitable for engineering materials applications requiring high strength, high toughness, and excellent wear resistance.

Description

Technical Field

[0001] This invention relates to the field of metallic materials technology, specifically to a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method. Background Technology

[0002] With the acceleration of industrialization, the requirements for material properties are constantly increasing, especially in terms of high strength, toughness, and wear resistance. Traditional aluminum alloys are no longer sufficient to meet the demands under high load and high wear environments. Therefore, developing aluminum alloys with excellent mechanical properties and wear resistance has become an important research direction. Aluminum alloys are widely used in mechanical and engineering fields. Due to their lightweight and easy processing characteristics, they are ideal materials for environments requiring high strength and good toughness. However, existing aluminum alloys have shortcomings in balancing high strength and high toughness and wear resistance, failing to meet the performance requirements under extreme working conditions. To address this, researchers have optimized the wear resistance and mechanical properties of aluminum alloys by adding different alloying elements. Among them, the Mg2Si phase, as a strengthening phase, significantly improves the strength and hardness of aluminum alloys. By optimizing the alloy composition and heat treatment process, its comprehensive performance, especially wear resistance and mechanical strength, can be significantly improved. However, existing Al-Mg2Si alloys still face technical challenges in composition design, processing technology, and microstructure control, especially in balancing the strength, toughness, and wear resistance of the alloy, where there is still room for improvement. Therefore, developing new high-strength, high-toughness, and wear-resistant Al-Mg2Si alloys and further improving their performance through rational preparation processes has become a current research focus.

[0003] Patent CN 116065045 B discloses a method for producing high-performance hypereutectic aluminum-silicon alloy ingots. This method involves smelting an aluminum source and industrial silicon, adding an Al-Sr master alloy (Sr content 3-5 wt%) for refining, and then producing Al-Si-Sr rod-shaped modifiers through continuous casting and rolling. Next, an Al-P master alloy (P content 0.05-0.10 wt%) is added, and the mixture is cast into ingots, ensuring uniform alloy composition and a fine microstructure. The alloy ingots prepared by this method exhibit excellent mechanical properties, with silicon phase particle size ≤20 μm, low slag content, and liquid hydrogen value meeting requirements. Although Sr and P alloying agents effectively improve the performance of aluminum-silicon alloy ingots, their cost is high, and excessive use may lead to porosity formation.

[0004] Patent CN 115401414 B discloses a method for preparing high-strength aluminum alloy guide rails for servers. This method involves processes such as aluminum alloy melt preparation, casting, hot rolling, homogenization heat treatment, extrusion, drawing, and solution aging to ultimately obtain an aluminum alloy guide rail with high strength and good plasticity. The aluminum alloy composition is Zn 0.8-1.5wt%, Mg 0.6-1.1wt%, Cu 1.2-1.9wt%, Zr 0.5-0.8wt%, Ti 0.01-0.03wt%, Si <0.1wt%, and Fe <0.15wt%, with grain size controlled by electromagnetic stirring. After solution heat treatment, the guide rail exhibits a tensile strength exceeding 650 MPa, a shear strength reaching 300 MPa, an elongation of 7-9%, a grain diameter controlled at 40-60 μm, and a grain structure difference of less than 10% between the edge and center. Although this method can provide high-performance guide rails, its production process involves many steps, which may lead to certain production costs.

[0005] Existing aluminum alloys still face technical challenges in achieving high strength, toughness, balance, and wear resistance, especially under high load and high wear environments, where traditional aluminum alloys can no longer meet performance requirements. Although the performance of aluminum alloys can be optimized by adding different alloying elements such as Mg2Si, existing Al-Mg2Si alloys still have shortcomings in composition design, processing technology, and microstructure control, failing to simultaneously achieve strength, toughness, and wear resistance. Therefore, developing aluminum alloys with excellent strength, toughness, and wear resistance has become an urgent problem to be solved. This invention provides a high-strength, toughness, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method. By optimizing the alloy composition and employing advanced processes such as fine-grained strengthening and asynchronous and synchronous rolling, the mechanical properties and wear resistance of the alloy are significantly improved, meeting the high-performance requirements of materials under extreme working conditions, and thus possessing significant technical necessity. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies in terms of high strength, toughness, balance, and wear resistance, and to provide a high-strength, toughness, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method. By optimizing the alloy composition and employing an advanced process combining fine-grained strengthening and asynchronous and synchronous rolling, the mechanical properties and wear resistance of the alloy are effectively improved, solving the problem of insufficient performance of traditional aluminum alloys under extreme working conditions. This method is simple, can be implemented on existing industrial equipment, and has high production efficiency and good prospects for industrial application.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy has the following chemical composition by mass percentage: Si 4.77~6.70, Mg 8.23~11.40%, Cu 0.1~0.5%, Ti≤0.1%, and the total content of P, Sr and Nd is between 0.01~0.20%, with the remainder being Al and unavoidable impurities.

[0009] Si (Silicon): Silicon is one of the key strengthening phases in Al-Mg2Si alloys, significantly improving the alloy's strength, hardness, and wear resistance. The inventors discovered that a silicon content between 4.77% and 6.70% ensures sufficient strengthening. Excessive silicon content may increase the alloy's brittleness; therefore, a suitable silicon content helps maintain good toughness and machinability while preserving strength.

[0010] Mg (magnesium): Magnesium forms the Mg₂Si phase with silicon, which has a significant strengthening effect. The inventors discovered that a magnesium content between 8.23% and 11.40% helps to strengthen the alloy's wear resistance and tensile strength. Excessive magnesium content may lead to a decrease in the alloy's toughness; therefore, a magnesium content within this range ensures both high strength and high toughness of the alloy.

[0011] Cu (copper): Copper can improve the strength, hardness, and corrosion resistance of alloys. The inventors discovered that a relatively low copper content of 0.1% to 0.5% ensures its strengthening effect without causing undesirable brittleness or reducing the alloy's ductility. The addition of copper helps to form a stable solid solution, thereby improving the alloy's strength and wear resistance.

[0012] Ti (Titanium): Titanium can improve the grain structure of aluminum alloys, enhancing their wear resistance and corrosion resistance. Low titanium content here primarily serves to improve the overall alloy structure and refine the grains, while avoiding the brittleness problems caused by over-strengthening.

[0013] Preferably, the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy has the following chemical composition by mass percentage: Si 5.20~5.85%, Mg 8.88~10.14%, Cu 0.1~0.5%, Ti≤0.1%, and the total content of P, Sr, and Nd is between 0.05~0.20%, with the remainder being Al and unavoidable impurities, each impurity element having a content not exceeding 0.05%, and the total amount of impurities not exceeding 0.15%.

[0014] Furthermore, in the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, the chemical composition mass percentage of Mg and Si is: wt.%(Mg) / wt.%(Si) ≤1.73.

[0015] The purpose of this design is to ensure that the excess silicon allows all magnesium to be completely converted into the Mg2Si phase, thereby maximizing the strengthening effect of the alloy. Mg2Si, as a strengthening phase, can significantly improve the strength and wear resistance of the alloy, while the excess silicon ensures the complete conversion of magnesium into Mg2Si, avoiding incomplete magnesium reaction and further enhancing the overall performance of the alloy. The rationale behind this design lies in its ability to optimize the mechanical properties of aluminum alloys, improving their tensile strength, wear resistance, and corrosion resistance, while maintaining good machinability and formability to meet the needs of various engineering applications.

[0016] Preferably, the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claims 1 to 3 has the following chemical composition by mass percentage: Si 5.55%, Mg 9.51%, Cu 0.2%, Ti 0.05%, and the total content of P, Sr and Nd is between 0.01% and 0.20%, with the remainder being Al and unavoidable impurities.

[0017] A method for preparing a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy includes the following steps:

[0018] (1) Alloy smelting: The alloy components described in claim 1 are smelted at a smelting temperature of 700~780℃;

[0019] (2) Fine grain strengthening treatment: After the alloy is completely melted and homogenized, a portion of the melt is taken for composition analysis. Based on the analysis results, the alloy composition is adjusted to the target composition, and a fine grain strengthening agent is added to the melt for fine grain strengthening treatment.

[0020] (3) Casting: The fine-grained strengthened aluminum liquid is cast into the prepared mold. The furnace temperature of the aluminum liquid is 680~720℃.

[0021] (4) Solution treatment: The ingot obtained in step three is subjected to homogenization treatment at a temperature of 460~580℃ and a holding time of 4.0~10.0 h;

[0022] (5) Large deformation rolling: The material after solution treatment in step (4) is subjected to large deformation rolling. The large deformation rolling process is high temperature hot rolling + large deformation temperature rolling + cold rolling.

[0023] Preferably, the method for preparing a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy is characterized by comprising the following steps:

[0024] (1) Alloy smelting: The alloy components described in claim 1 are smelted at a smelting temperature of 700~750℃;

[0025] (2) Fine grain strengthening treatment: After the alloy is completely melted and homogenized, a portion of the melt is taken for composition analysis. Based on the analysis results, the alloy composition is adjusted to the target composition, and a fine grain strengthening agent is added to the melt for fine grain strengthening treatment.

[0026] (3) Casting: The fine-grained strengthened aluminum liquid is cast into the prepared mold. The furnace temperature of the aluminum liquid is 680~700℃.

[0027] (4) Solution treatment: The ingot obtained in step three is subjected to homogenization treatment at a temperature of 480~520℃ and a holding time of 6.0~8.0 h;

[0028] (5) Large deformation rolling: The material after solution treatment in step (4) is subjected to large deformation rolling. The large deformation rolling is high temperature hot rolling + large deformation warm rolling + cold rolling. The hot rolling temperature range is 450~530℃, the warm rolling temperature range is 200~300℃, and the cold rolling temperature range is T room temperature~80℃.

[0029] Furthermore, in the preparation method of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, the fine-grained strengthening agent in step (2) is a crystal-controlling mixture mainly composed of P, Sr, and Nd elements that can significantly improve the microstructure and grain size of the cast alloy, with the total content of the three elements between 0.05% and 0.20%.

[0030] P (phosphorus): As a grain refiner, phosphorus can generate fine precipitates in aluminum alloys, thereby improving the strength and hardness of the alloy.

[0031] Sr (Strontium): Strontium is a known effective grain refiner that can improve the microstructure of aluminum alloys and enable them to maintain good mechanical properties at high temperatures.

[0032] Nd (neodymium): Neodymium is a rare earth element that is commonly used to improve the overall mechanical properties and wear resistance of aluminum alloys.

[0033] The inventors discovered that, under normal circumstances, phosphorus (P) refines primary Mg₂Si, while strontium (Sr) and neodymium (Nd) primarily refine eutectic Mg₂Si. Because these three elements have different operating temperatures, when used simultaneously in traditional methods, strontium and neodymium are prone to severe burn-off, failing to achieve the desired effect. However, the inventors found through experiments that when the total content of phosphorus, strontium, and neodymium is controlled between 0.01% and 0.2% and combined in a certain proportion, burn-off can be effectively avoided, thus achieving a good composite modification effect and significantly improving the mechanical properties and wear resistance of the alloy.

[0034] Furthermore, in the preparation method of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, in the large deformation rolling in step (5), asynchronous rolling + synchronous rolling is adopted, the deformation amount of asynchronous rolling is not less than 85%, the deformation amount of synchronous rolling is not less than 10%, and the total deformation amount is not less than 95%.

[0035] Furthermore, in the preparation method of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, the large deformation asynchronous rolling used in step (5) can be any one of three methods: the same roll diameter but different rotation speed, different roll diameter but the same rotation speed, or both roll diameter and rotation speed are different.

[0036] The inventors discovered that a combination of asynchronous and synchronous rolling was employed. Asynchronous rolling involves a deformation amount of no less than 85%, ensuring the alloy receives sufficient plastic deformation during rolling, effectively refining the grains and improving the alloy's strength, toughness, and wear resistance. Synchronous rolling involves a deformation amount of no less than 10%, which helps improve the alloy's surface quality and dimensional accuracy, ensuring the finished product's appearance and consistency.

[0037] The total deformation reaches over 95%, ensuring that the alloy undergoes sufficient plastic deformation to optimize its grain structure and mechanical properties. The inventors flexibly adjusted the rolling process by choosing methods such as rolling mills with the same diameter but different rotation speeds, rolling mills with different diameters but the same rotation speed, or both, to ensure that the material achieves the best balance between strength and toughness.

[0038] Furthermore, in the preparation method of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, the high-temperature hot rolling in step (5) of the large deformation rolling is heated at 530~550℃ for 20~30 min and 3~6 passes of reversing hot rolling; the large deformation warm rolling is carried out at 200~300℃ for 2~3 passes of continuous warm rolling; and the cold rolling is carried out at room temperature T~80℃ for 2 passes of continuous rolling.

[0039] Furthermore, in the method for preparing a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, the rolled material can be used directly or after tempering treatment. The tempering temperature is 120~180℃ and the holding time is 2.0~6.0 h.

[0040] Furthermore, in the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method, the Mg2Si morphology in the obtained aluminum alloy is granular, with no dendritic Mg2Si present. The size of the eutectic Mg2Si is 1.0~2.0 μm, the size of the primary Mg2Si is 5.0~10.0 μm, and the rolled Mg2Si exhibits a distinct banded distribution.

[0041] The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method are described above. The alloy has a yield strength of 140~200 MPa, a tensile strength of 160~240 MPa, and a total elongation of 4.0~12.0%.

[0042] Preferably, a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method are disclosed, wherein the alloy has a yield strength of not less than 180 MPa, a tensile strength of not less than 220 MPa, and a total elongation of not less than 4.0%.

[0043] This invention provides a high-strength, high-toughness, and wear-resistant hypereutectic Al-Mg2Si alloy and its preparation method. The method employs fine-grain strengthening treatment, casting, solution treatment, and large-deformation rolling processes, significantly improving the alloy's mechanical properties and wear resistance. Compared with existing technologies, this invention has the following advantages:

[0044] 1. Significantly Improved Mechanical Properties of the Alloy: By optimizing the alloy composition and employing fine-grain strengthening treatment, the alloy prepared by this invention exhibits excellent mechanical properties. The yield strength can reach 180 MPa, the tensile strength can reach 220 MPa, and the total elongation is not less than 4.0%. This alloy maintains good ductility while achieving high strength, making it suitable for high-load and high-strength engineering applications.

[0045] 2. Improved wear resistance and microstructure uniformity: This invention, through large deformation rolling, fine grain strengthening, and a reasonable element combination, achieves uniform distribution of Mg2Si particles and refined grains in the alloy, significantly improving its wear resistance. The rolled alloy exhibits a uniform grain structure, ensuring excellent performance in high-wear environments and extending its service life.

[0046] 3. Simple process and strong applicability: The preparation method of this invention includes steps such as smelting, fine grain strengthening treatment, casting, solution treatment, and large deformation rolling. The process is simple and can be implemented on existing industrial equipment. By adjusting the parameters in different process steps, such as temperature, time, and deformation amount, the properties of the alloy can be precisely controlled to meet different engineering needs, resulting in high production efficiency and good prospects for industrial application. Attached Figure Description

[0047] Figure 1 A process flow diagram of the preparation method of the present invention is shown;

[0048] Figure 2 The heat treatment process diagram of Example 1 is shown;

[0049] Figure 3 The tissue morphology photographs of Example 1 are shown;

[0050] Figure 4 The heat treatment process diagram of Example 2 is shown;

[0051] Figure 5 A photograph of the tissue morphology of Example 2 is shown. Detailed Implementation

[0052] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can make various changes and modifications without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0053] Example 1

[0054] A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy has the following chemical composition by mass percentage: Si 4.77%, Mg 8.23%, Cu 0.5%, Ti 0.01%, with the remainder being Al.

[0055] A method for preparing a high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy includes the following steps:

[0056] The alloy components according to claim 1 are smelted at a smelting temperature of 700°C.

[0057] After the alloy is completely and uniformly melted, a portion of the melt is taken for composition analysis. Based on the analysis results, the alloy composition is adjusted to the target composition, and a grain refiner is added to the melt for grain refinement strengthening treatment.

[0058] The fine-grained strengthened aluminum liquid is poured into the prepared mold, and the furnace temperature of the aluminum liquid is 720℃.

[0059] The obtained ingots were subjected to homogenization treatment at a temperature of 460℃ for 10.0 h.

[0060] The solution-treated material is subjected to large deformation rolling. The large deformation rolling process is high-temperature hot rolling + large deformation warm rolling + cold rolling. The hot rolling heating temperature is 530℃, the holding time is 30min, the hot rolling temperature is 530℃, the warm rolling temperature is 300℃, and the cold rolling temperature is 80℃.

[0061] After cold rolling, the material is tempered at 120°C for 6.0 h.

[0062] The average size of eutectic Mg2Si is 1.3 μm, the average size of primary Mg2Si is 6.0 μm, and the rolled Mg2Si exhibits a distinct banded distribution.

[0063] The alloy has a yield strength of 140 MPa, a tensile strength of 160 MPa, and a total elongation of 12.0%.

[0064] The chemical composition and mass percentage of the super-large excavator bucket teeth used for heat treatment in Examples 1-9 are shown in Table 1, the heat treatment process parameters are shown in Table 2, and the tested performance parameters are shown in Table 3.

[0065] Table 1 shows the chemical composition and mass percentage of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloys in Examples 1-9:

[0066]

[0067] Table 2 shows the manufacturing process parameters for the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloys in Examples 1-9:

[0068]

[0069] Table 3 shows the performance parameters of the high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy products in Examples 1-9:

[0070]

[0071] This invention provides a detailed description of the production of super high-strength and high-toughness steel and its preparation method, aiming to facilitate rapid understanding and mastery of the invention by those skilled in the art. Furthermore, researchers familiar with the art can make modifications based on the examples of this invention for their own use. Therefore, the examples of this invention are not limited to those mentioned above, and modifications made by those skilled in the art based on the basic ideas and framework of this invention should be within the scope of protection of this invention.

Claims

1. A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy, characterized in that: Its chemical composition by mass percentage is: Si 4.77~6.70, Mg 8.23~11.40%, Cu 0.1~0.5%, Ti≤0.1%, and the total content of P, Sr and Nd is between 0.01~0.20%, with the remainder being Al and unavoidable impurities; The high-strength, high-toughness, and wear-resistant hypereutectic Al-Mg2Si alloy is obtained by a preparation method including the following steps: (1) Alloy smelting: Smelting is carried out according to the chemical composition of the alloy at a smelting temperature of 700~750℃; (2) Fine grain strengthening treatment: After the alloy is completely melted and homogenized, a portion of the melt is taken for composition analysis. Based on the analysis results, the alloy composition is adjusted to the target composition, and a fine grain strengthening agent is added to the melt for fine grain strengthening treatment. The fine grain strengthening agent is a crystal-controlling mixture mainly composed of P, Sr and Nd elements that can significantly improve the microstructure and grain size of the cast alloy. The total content of the three elements is between 0.05% and 0.20%. (3) Casting: The fine-grained strengthened aluminum liquid is cast into the prepared mold. The furnace temperature of the aluminum liquid is 680~700℃. (4) Solution treatment: The ingot obtained in step three is subjected to homogenization treatment at a temperature of 480~520℃ and a holding time of 6.0~8.0 h; (5) Large deformation rolling: The material after solution treatment in step (4) is subjected to large deformation rolling. The large deformation rolling process is high-temperature hot rolling + large deformation warm rolling + cold rolling. The hot rolling temperature range is 450~530℃, the warm rolling temperature range is 200~300℃, and the cold rolling temperature range is T 室温 ~80℃.

2. The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that: Its chemical composition by mass percentage is as follows: Si 5.20~5.85%, Mg 8.88~10.14%, Cu 0.1~0.5%, Ti≤0.1%, the total content of P, Sr and Nd is between 0.05~0.20%, the remainder is Al and unavoidable impurities, the content of each impurity element does not exceed 0.05%, and the total amount of impurities does not exceed 0.15%.

3. The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, The chemical composition of Mg and Si by mass percentage: wt.%(Mg) / wt.%(Si) ≤1.

73.

4. A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1 or 2, characterized in that: Its chemical composition by mass percentage is: Si 5.55%, Mg 9.51%, Cu 0.2%, Ti 0.05%, and the total content of P, Sr and Nd is between 0.01% and 0.20%, with the remainder being Al and unavoidable impurities.

5. The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, In the large deformation rolling described in step (5), an asynchronous rolling + synchronous rolling method is adopted, with the asynchronous rolling deformation amount not less than 85%, the synchronous rolling deformation amount not less than 10%, and the total deformation amount not less than 95%.

6. The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, Step (5) Large deformation asynchronous rolling is any one of three methods: roll diameter is the same but speed is different, roll diameter is different but speed is the same, or roll diameter and speed are different.

7. The high-strength, high-toughness, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, Step (5) The high-temperature hot rolling used in the large deformation rolling is heating at 530~550℃ for 20~30 min, and performing 3~6 passes of reversing hot rolling; the large deformation warm rolling is performing 2~3 passes of continuous warm rolling at 200~300℃; the cold rolling is performed at T 室温 Two-pass continuous rolling processes are performed at ~80℃.

8. The high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, The rolled material can be used directly or after tempering. The tempering temperature is 120~180℃ and the holding time is 2.0~6.0 h.

9. A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, The obtained aluminum alloy has a granular Mg2Si morphology with no dendritic Mg2Si present. The eutectic Mg2Si has a size of 1.0~2.0 μm, the primary Mg2Si has a size of 5.0~10.0 μm, and the rolled Mg2Si exhibits a distinct banded distribution.

10. A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, The alloy has a yield strength of 140-200 MPa, a tensile strength of 160-240 MPa, and a total elongation of 4.0-12.0%.

11. A high-strength, tough, and wear-resistant hypereutectic Al-Mg2Si alloy according to claim 1, characterized in that, The alloy has a yield strength of not less than 180 MPa, a tensile strength of not less than 220 MPa, and a total elongation of not less than 4.0%.

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