High-elongation high-zirconium aluminum-magnesium-silicon alloy, preparation method and application thereof

Abstract

The application discloses a high-elongation high-zirconium aluminum-magnesium-silicon alloy and a preparation method and application thereof, and belongs to the technical field of non-ferrous metallurgy. The high-zirconium aluminum-magnesium-silicon alloy comprises the following components in percentage by mass: 0.8-1.2 wt.% of Mg, 0.4-0.8 wt.% of Si, 0.15-0.4 wt.% of Cu, 0.8-1.6 wt.% of Zr, <0.15 wt.% of Mn, 0.1-0.2 wt.% of Y, and the balance of Al and inevitable impurities. The preparation method comprises the steps of alloying, refining and degassing, ingot casting, hot deformation and solid solution aging. The target alloy has a tensile strength of greater than or equal to 315 MPa, a yield strength of greater than or equal to 285 MPa, and an elongation of greater than or equal to 13%. The prepared high-elongation high-zirconium aluminum-magnesium-silicon alloy can be used for automobile structural parts, and meets the demand of automobile lightweight development.

Description

Technical Field

[0001] This invention belongs to the field of non-ferrous metal metallurgy technology, specifically relating to a high-elongation high-zirconium-aluminum-magnesium-silicon alloy, its preparation method, and its application. Background Technology

[0002] Aluminum-magnesium-silicon alloys are heat-treatable wrought aluminum alloys with aluminum as the base material and magnesium and silicon as the main alloying elements. Due to their high specific strength, good corrosion resistance, excellent processing performance, and good weldability, aluminum-magnesium-silicon alloys are widely used in the construction, automotive, electronics, and aerospace industries. For example, with their excellent extrusion properties, good strength-to-weight ratio, formability, and corrosion resistance, aluminum-magnesium-silicon alloys are one of the main materials for lightweighting automobiles, especially in extruded structural parts, body frames, and chassis suspension components, where they have irreplaceable advantages.

[0003] Currently, the traditional aluminum-magnesium-silicon alloy 6061, after deformation and solution aging treatment, has a tensile strength ≥290 MPa and an elongation of 10-12%. However, with the parallel development of lightweight and high-strength automobiles, the application of traditional aluminum-magnesium-silicon alloys such as 6061 in components requiring high impact resistance (such as A-pillars and bumper beams) is limited. This limitation needs to be overcome through material selection optimization (such as mixing with steel, other aluminum alloys, or composite materials), innovative structural design (such as adding reinforcing ribs), advanced connection processes, and effective anti-corrosion measures, thus restricting the expansion of its application.

[0004] To address the challenge of insufficient tensile strength and elongation in traditional aluminum-magnesium-silicon alloys, this invention employs adjustments to the zirconium content and the microstructure control through deformation and solution aging processes. By utilizing the synergistic effect of plastic deformation and solution aging, a high-density texture is formed within the aluminum matrix, ultimately achieving a synergistic improvement in strength and toughness, with a tensile strength >300 MPa and an elongation >12%. Therefore, developing a high-zirconium-content aluminum-magnesium-silicon alloy with a short production cycle, high tensile strength and elongation, low cost, and low equipment requirements is of great significance in meeting the demands of automotive lightweighting. Summary of the Invention

[0005] The first objective of this invention is to provide a high-elongation high-zirconium-aluminum-magnesium-silicon alloy; the second objective is to provide a method for preparing the high-elongation high-zirconium-aluminum-magnesium-silicon alloy; and the third objective is to provide applications of the high-elongation high-zirconium-aluminum-magnesium-silicon alloy.

[0006] The first objective of this invention is achieved as follows: the high zirconium aluminum magnesium silicon alloy comprises, by mass percentage, the following components: 0.8–1.2 wt.% Mg, 0.4–0.8 wt.% Si, 0.15–0.4 wt.% Cu, 0.8–1.6 wt.% Zr, <0.15 wt.% Mn, 0.1–0.2 wt.% Y, with the balance being Al and unavoidable impurities.

[0007] The second objective of this invention is achieved as follows: the method for preparing the high-elongation high-zirconium-aluminum-magnesium-silicon alloy includes alloying, refining and degassing, casting into ingots, hot deformation, and solution aging steps, specifically including: A. Alloying: Melt aluminum ingots, add Cu according to the formula ratio at 680~720℃, then raise the temperature to 710~730℃ at 2~4℃ / min, and add Al-20Si, Mn and Mg in sequence according to the formula ratio. After Al-20Si, Mn and Mg melt, hold the temperature for 8~12min, continue to raise the temperature to 850~870℃ at 2~4℃ / min, add Al-10Zr and hold for 20~25min, then raise the temperature to 910~930℃ at 2~4℃ / min, add Al-3Y or Al-5Y and hold for 25~30min, and cool down to 720~760℃ to obtain melt a; B. Refining and Degassing: Control the temperature of melt a at 730-740℃ for slag removal, then add refining agent at a rate of 1-2 kg / ton, and at a rate of 0.5-1 m³ / min per ton of molten aluminum. 3 Inert gas was introduced for refining and degassing for 10-15 minutes, and the mixture was stirred twice with an inert, non-wetting stirrer for 3-5 minutes each time to obtain alloy melt b. C. Casting into ingots: Cool the alloy melt b to 720-730℃, hold it at that temperature for 8-12 minutes, and then pour it into a mold preheated to 150-200℃ for solidification to obtain ingot c; D. Hot deformation: Heat the ingot c and hold it at 400-410℃ for 1 hour for every 25-30mm of thickness. Forge 4-5 times and control the total deformation at 40-50% to obtain the deformed aluminum alloy d. E. Solution treatment and aging: Heat the deformed aluminum alloy d at 520-525℃ for 60-180 min, remove it and quench it to complete the solution treatment; after solution treatment, heat the specimen at 155-160℃ for 460-480 min, remove it and air cool it.

[0008] The third objective of this invention is achieved by the application of the high-elongation high-zirconium-aluminum-magnesium-silicon alloy in automotive structural components.

[0009] The technical solution described in this invention has the following advantages compared with the prior art: The proposed technical solution increases the Zr content in the alloy composition. Zr and Y can form a high-volume-fraction L12 structure nanophase, which exhibits high thermal stability and can significantly inhibit recrystallization and grain growth, thereby improving the high-temperature strength of the alloy. Simultaneously, Zr and Y can synergistically form a core-shell precipitate with Al3Zr as the core and Al3Y as the outer shell, further enhancing phase boundary stability and delaying high-temperature coarsening.

[0010] The proposed technical solution employs a three-stage heating method, allowing elements with different solubility properties to dissolve within their respective optimal temperature ranges. This avoids excessively long heating times, which can lead to grain coarsening and oxidation. Prolonged holding at high temperatures, with the addition of Al-3Y / Al-5Y, promotes the diffusion and dissolution of Y, preventing localized segregation and the formation of brittle, bulky phases, thereby protecting the continuity of the matrix.

[0011] Furthermore, since Zr diffuses slowly in aluminum, Y should be added after Zr has dissolved preferentially. Zr acts as nucleation sites for Y precipitation, promoting the formation of the composite phase. In subsequent hot deformation and heat treatment, the high-temperature stable Al3(Zr,Y) nanophase can pin grain boundaries and subgrain boundaries, inhibiting recrystallization and grain growth. The fine-grained structure not only improves strength but also provides more grain boundary slip space, coordinating plastic deformation, delaying necking, and thus improving uniform elongation.

[0012] The proposed technical solution employs a lower forging temperature. Low-temperature deformation can suppress dynamic recrystallization, preserve the deformed texture, and increase dislocation density. Multi-pass forging results in a more uniform distribution of the Al3(Zr,Y) composite phase, forming a slender deformed grain structure, providing more nucleation sites for subsequent aging, while avoiding coarsening of the Zr / Y precipitates caused by high temperatures.

[0013] The proposed technical solution employs low-temperature long-term aging. Low temperature allows for the formation of finer precipitates, improving strength. Long-term aging ensures sufficient precipitation and, in conjunction with the L12 structure Al3(Zr,Y) phase, hinders dislocation movement. The coherent interface exhibits strong bonding, making it less likely to become a path for crack propagation, further enhancing the alloy's heat resistance and elongation. Detailed Implementation

[0014] The present invention will be further described below, but this is not intended to limit the invention in any way. Any modifications or substitutions made based on the teachings of the present invention shall fall within the scope of protection of the present invention.

[0015] The high zirconium aluminum magnesium silicon alloy of the present invention comprises, by mass percentage, the following components: 0.8–1.2 wt.% Mg, 0.4–0.8 wt.% Si, 0.15–0.4 wt.% Cu, 0.8–1.6 wt.% Zr, <0.15 wt.% Mn, 0.1–0.2 wt.% Y, with the balance being Al and unavoidable impurities.

[0016] The high zirconium aluminum magnesium silicon alloy preferably comprises the following components by mass percentage: 1.0–1.2 wt.% Mg, 0.6–0.8 wt.% Si, 0.15–0.25 wt.% Cu, 1.2–1.6 wt.% Zr, <0.12 wt.% Mn, 0.1–0.2 wt.% Y, with the balance being Al and unavoidable impurities.

[0017] The method for preparing the high-elongation high-zirconium-aluminum-magnesium-silicon alloy of the present invention includes alloying, refining and degassing, casting into ingots, hot deformation, and solution aging steps, specifically including: A. Alloying: Melt aluminum ingots, add Cu according to the formula ratio at 680~720℃, then raise the temperature to 710~730℃ at 2~4℃ / min, and add Al-20Si, Mn and Mg in sequence according to the formula ratio. After Al-20Si, Mn and Mg melt, hold the temperature for 8~12min, continue to raise the temperature to 850~870℃ at 2~4℃ / min, add Al-10Zr and hold for 20~25min, then raise the temperature to 910~930℃ at 2~4℃ / min, add Al-3Y or Al-5Y and hold for 25~30min, and cool down to 720~760℃ to obtain melt a; B. Refining and Degassing: Control the temperature of melt a at 730-740℃ for slag removal, then add refining agent at a rate of 1-2 kg / ton, and at a rate of 0.5-1 m³ / min per ton of molten aluminum. 3 Inert gas was introduced for refining and degassing for 10-15 minutes, and the mixture was stirred twice with an inert, non-wetting stirrer for 3-5 minutes each time to obtain alloy melt b. C. Casting into ingots: Cool the alloy melt b to 720-730℃, hold it at that temperature for 8-12 minutes, and then pour it into a mold preheated to 150-200℃ for solidification to obtain ingot c; D. Hot deformation: Heat the ingot c and hold it at 400-410℃ for 1 hour for every 25-30mm of thickness. Forge 4-5 times and control the total deformation at 40-50% to obtain the deformed aluminum alloy d. E. Solution treatment and aging: Heat the deformed aluminum alloy d at 520-525℃ for 60-180 min, remove it and quench it to complete the solution treatment; after solution treatment, heat the specimen at 155-160℃ for 460-480 min, remove it and air cool it.

[0018] In the alloying step, the preferred process values ​​include: melting aluminum ingots, adding Cu at 700℃ according to the formula ratio, then raising the temperature to 720℃ at 2℃ / min, and then adding Al-20Si, Mn, and Mg sequentially according to the formula ratio. After Al-20Si, Mn, and Mg melt, hold the temperature for 8-12 minutes, continue to raise the temperature to 850℃ at 2℃ / min, add Al-10Zr and hold for 20-25 minutes, then raise the temperature to 910℃ at 2℃ / min, add Al-5Y and hold for 25 minutes, and then cool down to 740℃ to obtain melt a.

[0019] In the refining and degassing step, the refining agent is one or any combination of KCl, BaCl2, CaF2, CaCl2, MgCl2, and MgF2. The introduction of the inert gas is preferably done by rotary jetting. The inert gas is preferably nitrogen. The inert and non-wetting stirrer is either a dry carbon rod or a graphite paddle, preferably a dry carbon rod.

[0020] In the casting process, the preferred holding time is 10 minutes.

[0021] In the hot deformation step, the holding time is 100-150 minutes, preferably 120 minutes. The forging is any one of unidirectional forging, multidirectional forging, and cross forging, preferably unidirectional forging.

[0022] In the solution aging step, the holding time is preferably 90 minutes. The quenching is either water quenching or liquid quenching, with water quenching being preferred, and the water temperature being 20~80℃.

[0023] In all the above steps, heating is carried out in a box-type resistance furnace.

[0024] The application of this invention is the use of the high-elongation high-zirconium-aluminum-magnesium-silicon alloy in automotive structural components.

[0025] The invention will be further illustrated below with specific implementation examples: Example 1

[0026] The high zirconium aluminum magnesium silicon alloy comprises the following components by mass percentage: 1.0 wt.% Mg, 0.8 wt.% Si, 0.2 wt.% Cu, 1.0 wt.% Zr, 0.11 wt.% Mn, and 0.2 wt.% Y. 22.59 g of Mg, 80 g of Al-20Si alloy, 4.15 g of Cu, 324.7 g of Al-10Zr alloy, and 80.9 g of Al-5Y are weighed out, with the balance being pure aluminum ingots.

[0027] A. Alloying: Pure aluminum ingots are completely melted, and Cu is added at 700℃ according to the formula ratio. Then, the temperature is increased to 720℃ at 2℃ / min, and Al-20Si, Mn, and Mg are added sequentially according to the formula ratio. After Al-20Si, Mn, and Mg melt, the temperature is held for 8 minutes. The temperature is then increased to 850℃ at 2℃ / min, and Al-10Zr is added and held for 20 minutes. Subsequently, the temperature is increased to 910℃ at 2℃ / min, and Al-3Y is added and held for 25 minutes. The temperature is then reduced to 740℃ to obtain melt a.

[0028] B. Refining and Degassing: The temperature of melt a is controlled at 730℃ for slag removal. Then, MgCl2 is added at a rate of 2 kg / ton, and the flow rate is increased at 0.5 m³ / min per ton of molten aluminum. 3 Nitrogen gas was introduced for refining and degassing for 10 minutes, and the mixture was stirred twice with a dry carbon rod for 5 minutes each time to obtain alloy melt b.

[0029] C. Casting into ingots: Cool the alloy melt b to 720℃, keep it at that temperature for 10 minutes, and then pour it into a mold preheated to 150℃ for solidification to obtain ingot c.

[0030] D. Hot deformation: The ingot c is heated and held at 400℃ for 120 minutes, and then forged unidirectionally 4 times. The total deformation is 50%, resulting in deformed aluminum alloy d.

[0031] E. Solution treatment and aging: The deformed aluminum alloy d was heated and held at 520℃ for 90 min. After being removed, it was quenched in water to complete the solution treatment. After the solution treatment, the specimen was heated and held at 160℃ for 480 min. After being removed and air-cooled, the target high zirconium aluminum magnesium silicon alloy was obtained.

[0032] The resulting alloy was tested for mechanical properties, and its tensile strength was 315 MPa, yield strength was 285 MPa, and elongation was 13%.

[0033] Example 2

[0034] The high zirconium aluminum magnesium silicon alloy comprises the following components by mass percentage: 1.0 wt.% Mg, 0.8 wt.% Si, 0.2 wt.% Cu, 1.0 wt.% Zr, 0.11 wt.% Mn, and 0.2 wt.% Y. 22.26 g of Mg, 80 g of Al-20Si alloy, 4.1 g of Cu, 320 g of Al-10Zr alloy, and 80 g of Al-5Y are weighed out, with the balance being pure aluminum ingots.

[0035] A. Alloying: Pure aluminum ingots are completely melted, and Cu is added at 700℃ according to the formula ratio. Then, the temperature is increased to 720℃ at 2℃ / min, and Al-20Si, Mn, and Mg are added sequentially according to the formula ratio. After Al-20Si, Mn, and Mg melt, the temperature is held for 8 minutes. The temperature is then increased to 850℃ at 2℃ / min, and Al-10Zr is added and held for 20 minutes. Subsequently, the temperature is increased to 910℃ at 2℃ / min, and Al-3Y is added and held for 25 minutes. The temperature is then reduced to 740℃ to obtain melt a.

[0036] B. Refining and Degassing: The temperature of melt a is controlled at 730℃ for slag removal. Then, MgCl2 is added at a rate of 2 kg / ton, and the flow rate is increased at 0.5 m³ / min per ton of molten aluminum. 3 Nitrogen gas was introduced for refining and degassing for 10 minutes, and the mixture was stirred twice with a dry carbon rod for 5 minutes each time to obtain alloy melt b.

[0037] C. Casting into ingots: Cool the alloy melt b to 720℃, keep it at that temperature for 10 minutes, and then pour it into a mold preheated to 150℃ for solidification to obtain ingot c.

[0038] D. Hot deformation: The ingot c is heated and held at 400℃ for 120 minutes, and then forged unidirectionally 5 times. The total deformation is 50%, resulting in deformed aluminum alloy d.

[0039] E. Solution treatment and aging: The deformed aluminum alloy d was heated and held at 520℃ for 90 min. After being removed, it was quenched in water to complete the solution treatment. After the solution treatment, the specimen was heated and held at 160℃ for 480 min. After being removed and air-cooled, the target high zirconium aluminum magnesium silicon alloy was obtained.

[0040] The resulting alloy was tested for mechanical properties, and its tensile strength was 320 MPa, yield strength was 287 MPa, and elongation was 13%.

[0041] Example 3

[0042] The high-zirconium aluminum magnesium silicon alloy comprises, by mass percentage, the following components: 0.8 wt.% Mg, 0.4 wt.% Si, 0.15 wt.% Cu, 0.8 wt.% Zr, 0.10 wt.% Mn, and 0.1 wt.% Y, with the balance being Al and unavoidable impurities. 18.07 g of Mg, 45.18 g of Al-20Si alloy, 3.39 g of Cu, 271.08 g of Al-10Zr alloy, and 45.18 g of Al-5Y were weighed, with the balance being pure aluminum ingots.

[0043] A. Alloying: Pure aluminum ingots are completely melted. Cu is added at 680℃ according to the formula ratio. Then, the temperature is increased to 710℃ at 3℃ / min. Al-20Si, Mn, and Mg are added sequentially according to the formula ratio. After Al-20Si, Mn, and Mg melt, the temperature is held for 12 minutes. The temperature is then increased to 860℃ at 3℃ / min. Al-10Zr is added and held for 25 minutes. Then, the temperature is increased to 920℃ at 3℃ / min. Al-5Y is added and held for 30 minutes. The temperature is then reduced to 720℃ to obtain melt a.

[0044] B. Refining and Degassing: The temperature of melt a is controlled at 730℃ for slag removal. Then, MgF2 is added at a rate of 1 kg / ton, and a rotary jet is used to blow it at a rate of 0.5 m³ / min per ton of molten aluminum. 3 Nitrogen gas was introduced for refining and degassing for 15 minutes, and the mixture was stirred twice with a dry graphite paddle for 3 minutes each time to obtain alloy melt b.

[0045] C. Casting into ingots: Cool the alloy melt b to 725℃, keep it at that temperature for 8 minutes, and then pour it into a mold preheated to 180℃ for solidification to obtain ingot c.

[0046] D. Hot deformation: The ingot c is heated and held at 400℃ for 150 min, and then cross-forged 5 times. The total deformation is 50%, resulting in deformed aluminum alloy d.

[0047] E. Solution treatment and aging: The deformed aluminum alloy d was heated and held at 520℃ for 180 min. After being removed, it was quenched in water to complete the solution treatment. After the solution treatment, the specimen was heated and held at 155℃ for 470 min. After being removed and air-cooled, the target high zirconium aluminum magnesium silicon alloy was obtained.

[0048] Example 4

[0049] The high-zirconium aluminum magnesium silicon alloy comprises, by mass percentage, the following components: 1.2 wt.% Mg, 0.6 wt.% Si, 0.4 wt.% Cu, 0.8 wt.% Zr, 0.12 wt.% Mn, and 0.15 wt.% Y, with the balance being Al and unavoidable impurities. 27.11 g of Mg, 67.77 g of Al-20Si alloy, 9.04 g of Cu, 361.44 g of Al-10Zr alloy, and 67.77 g of Al-5Y were weighed, with the balance being pure aluminum ingots.

[0050] A. Alloying: Pure aluminum ingots are completely melted. Cu is added at 720℃ according to the formula ratio. Then, the temperature is increased to 730℃ at 3℃ / min. Al-20Si, Mn, and Mg are added sequentially according to the formula ratio. After Al-20Si, Mn, and Mg melt, the temperature is held for 10 minutes. The temperature is then increased to 870℃ at 3℃ / min. Al-10Zr is added and held for 22 minutes. Then, the temperature is increased to 930℃ at 3℃ / min. Al-5Y is added and held for 28 minutes. The temperature is then reduced to 760℃ to obtain melt a.

[0051] B. Refining and Degassing: The temperature of melt a is controlled at 740℃ for slag removal. Then, MgF2 is added at a rate of 1.5 kg / ton, and a rotary jet is used to blow it at a rate of 1 m³ / min per ton of molten aluminum. 3 Nitrogen gas was introduced for refining and degassing for 12 minutes, and the mixture was stirred twice with a dry graphite paddle for 4 minutes each time to obtain alloy melt b.

[0052] C. Casting into ingots: Cool the alloy melt b to 730℃, keep it at that temperature for 12 minutes, and then pour it into a mold preheated to 200℃ for solidification to obtain ingot c.

[0053] D. Hot deformation: The ingot c is heated and held at 410℃ for 100 min, and then cross-forged 4 times. The total deformation is 40%, resulting in deformed aluminum alloy d.

[0054] E. Solution treatment and aging: The deformed aluminum alloy d was heated and held at 525℃ for 60 min. After being removed, it was quenched in water to complete the solution treatment. After the solution treatment, the specimen was heated and held at 160℃ for 460 min. After being removed, it was air-cooled to obtain the target high zirconium aluminum magnesium silicon alloy.

Claims

1. A high-elongation high-zirconium-aluminum-magnesium-silicon alloy, characterized in that, The high zirconium aluminum magnesium silicon alloy comprises, by mass percentage, the following components: 0.8–1.2 wt.% Mg, 0.4–0.8 wt.% Si, 0.15–0.4 wt.% Cu, 0.8–1.6 wt.% Zr, <0.15 wt.% Mn, 0.1–0.2 wt.% Y, with the balance being Al and unavoidable impurities.

2. A method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy as described in claim 1, characterized in that, The process includes alloying, refining and degassing, casting into ingots, hot deformation, solution treatment and aging, specifically including: A. Alloying: Melt aluminum ingots, add Cu according to the formula ratio at 680~720℃, then raise the temperature to 710~730℃ at 2~4℃ / min, and add Al-20Si, Mn and Mg in sequence according to the formula ratio. After Al-20Si, Mn and Mg melt, hold the temperature for 8~12min, continue to raise the temperature to 850~870℃ at 2~4℃ / min, add Al-10Zr and hold for 20~25min, then raise the temperature to 910~930℃ at 2~4℃ / min, add Al-3Y or Al-5Y and hold for 25~30min, and cool down to 720~760℃ to obtain melt a; B. Refining and Degassing: Control the temperature of melt a at 730-740℃ for slag removal, then add refining agent at a rate of 1-2 kg / ton, and at a rate of 0.5-1 m³ / min per ton of molten aluminum. 3 Inert gas was introduced for refining and degassing for 10-15 minutes, and the mixture was stirred twice with an inert, non-wetting stirrer for 3-5 minutes each time to obtain alloy melt b. C. Casting into ingots: Cool the alloy melt b to 720-730℃, hold it at that temperature for 8-12 minutes, and then pour it into a mold preheated to 150-200℃ for solidification to obtain ingot c; D. Hot deformation: Heat the ingot c and hold it at 400-410℃ for 1 hour for every 25-30mm of thickness. Forge 4-5 times and control the total deformation at 40-50% to obtain the deformed aluminum alloy d. E. Solution treatment and aging: Heat the deformed aluminum alloy d at 520-525℃ for 60-180 min, remove it and quench it to complete the solution treatment; after solution treatment, heat the specimen at 155-160℃ for 460-480 min, remove it and air cool it.

3. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the alloying step, the heating rate is 2℃ / min.

4. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the refining and degassing step, the refining agent is one or any combination of KCl, BaCl2, CaF2, CaCl2, MgCl2 and MgF2.

5. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the refining and degassing step, the inert and non-wetting agitator is either a dry carbon rod or a graphite paddle.

6. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the heat deformation step, the heat preservation time is 120 minutes.

7. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the hot deformation step, the forging is unidirectional forging.

8. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the solution treatment and aging step, the heat preservation time is 90 minutes.

9. The method for preparing a high-elongation high-zirconium-aluminum-magnesium-silicon alloy according to claim 2, characterized in that, In the solution aging step, the quenching is performed by water quenching.

10. An application of the high elongation high zirconium aluminum magnesium silicon alloy of claim 1, characterized in that, Application of the high-elongation high-zirconium aluminum magnesium silicon alloy in automotive structural components.