A method for manufacturing ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes

Abstract

This invention relates to a method for manufacturing ultra-high strength and corrosion-resistant aluminum alloy for bicycle spokes. The purpose of this invention is to address the problem that existing aluminum alloy wires do not meet the requirements for bicycle wheel spokes. Through a unique chemical composition ratio, innovative process flow, and solution quenching method, this invention produces aluminum alloy wires for bicycle wheel spokes with a diameter range of 3.0mm-4.0mm. These wires exhibit high surface quality, high room temperature strength, tensile strength of not less than 600MPa, yield strength of not less than 550MPa, and elongation of not less than 8.0%. Simultaneously, their corrosion resistance is at least PA level. This invention fills the gap in the production methods of ultra-high strength and corrosion-resistant aluminum alloy wires for high-end forest and mountain bike wheel spokes both domestically and internationally. This invention is applied in the field of bicycle spoke manufacturing.

Description

Technical Field

[0001] This invention relates to a method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes. Background Technology

[0002] The most typical application of spokes is in bicycle wheels. To achieve high strength, lightweight, and corrosion resistance, high-end bicycle wheel spokes are currently made primarily of titanium alloy, which has a very high manufacturing cost, resulting in expensive bicycles that are unaffordable for ordinary consumers and limited market sales. From the perspective of raw material sourcing, firstly, aluminum alloys are used in various industries such as aerospace, rail transportation, air chemicals, and weaponry, and their processing and application are very mature, with low manufacturing costs; secondly, the price of pure aluminum, the basic raw material, is generally about one-third that of titanium. From the perspective of the physical and chemical properties of aluminum alloys, it is well known that they have low density (approximately 62% of titanium alloys), high specific strength, and corrosion resistance. Considering these two aspects, provided that the performance indicators meet the bicycle safety design standards, using aluminum alloys can significantly reduce manufacturing costs, lighten the bicycle frame, and boost market sales, making it a viable alternative to titanium alloy spokes.

[0003] Forest areas have high humidity levels, placing high demands on the corrosion resistance of bicycle wheel spoke materials, requiring a corrosion resistance level no lower than PA. Furthermore, the rugged terrain of mountainous areas necessitates materials with a tensile strength of at least 600 MPa, a yield strength of at least 550 MPa, and an elongation of at least 8.0% to meet safety requirements. Existing wire materials on the domestic and international markets used for manufacturing aluminum alloy spokes either fail to meet the strength or corrosion resistance requirements. This is primarily because the strength and corrosion resistance of aluminum alloy materials are inversely correlated; higher strength often leads to decreased corrosion resistance. Therefore, there is an urgent need for a suitable aluminum alloy material for forest mountain bike wheel spokes. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing aluminum alloy wires do not meet the requirements for use in bicycle wheel spokes, and to provide a method for manufacturing ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes.

[0005] The present invention discloses a method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes, which is carried out according to the following steps:

[0006] I. Based on the mass percentage of alloying elements as follows: Si: <0.20%, Fe: <0.30%, Cu: 1.8%–2.6%, Mn: <0.05%, Mg: 1.4%–2.3%, Zn: 9.0%–9.6%, Ti: 0.04%–0.06%, Cr: 0.15%–0.25%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710℃–740℃, an aluminum alloy melt is obtained.

[0007] 2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

[0008] 3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 450℃~465℃. Hold it at this temperature for 10h~14h for homogenization annealing.

[0009] 4. After removing the oxide scale from the surface of the aluminum alloy ingot obtained in step 3, the aluminum alloy ingot with a diameter of 405mm is placed in a heating furnace and heated to a temperature of 350℃~420℃.

[0010] 5. The ingots processed in step 4 at a temperature of 350℃~420℃ are extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s~0.6mm / s to obtain bars with a diameter of 145mm.

[0011] 6. Heat the bar material prepared in step 5 to 350℃-380℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill;

[0012] 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing;

[0013] 8. Cold roll the wire processed in step 7 to a diameter of 3.5mm-5.0mm;

[0014] 9. Heat the wires with a diameter of 3.5mm-5.0mm obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing.

[0015] 10. After processing in step nine, control the cold working rate at 35%-40% and cold roll it to a diameter of 3.0mm-4.0mm;

[0016] 11. The cold-rolled strip from step 10 is heated to 460℃-466℃ in 10-20 seconds using induction heating, held at that temperature for 4-5 minutes for solution treatment, and then cooled by air mist to quench to 25℃-35℃ in 3-5 seconds.

[0017] 12. The lines processed in step 11 are subjected to artificial aging treatment to obtain ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles. The aging treatment is carried out in two stages. In the first stage, the aging temperature is controlled at 100℃-107℃ and the holding time is 6.5h-7.0h. In the second stage, the aging temperature is controlled at 160℃-167℃ and the holding time is 17.5-18h.

[0018] To meet market demand for high-end bicycle wheel spoke materials, this invention systematically studied the effects of chemical composition, casting, deformation processing, solution treatment temperature, solution holding time, aging temperature, and aging holding time on the performance of aluminum alloy spokes. Furthermore, it innovated deformation processing and solution quenching production methods, establishing a manufacturing method for ultra-high strength and corrosion-resistant aluminum alloy spokes for bicycles, producing aluminum alloy spokes that meet user requirements.

[0019] This invention utilizes a unique chemical composition ratio and an innovative deformation processing flow (the wire rod of this invention has a high alloying content, resulting in severe work hardening and a rapid decrease in plasticity during cold working). The deformation process is changed from stretching to rolling, and the processing is shifted from being primarily under tensile stress to being under triaxial compressive stress. Firstly, rolling deformation allows for a higher deformation rate per pass. While the deformation amount per pass in stretching deformation is generally no more than 35%, the deformation amount in a single pass in rolling deformation can reach 60-80%, reducing the number of annealing softening cycles during cold working, thereby effectively reducing the grain size of the wire rod and improving its various properties. Secondly, rolling deformation avoids the problems caused by reduced material plasticity, poor local lubrication, and minor surface defects during the stretching process. The process of cutting off the wire effectively reduces the difficulty of the processing, ensures production continuity, improves production efficiency, and reduces production costs. The innovative solution quenching production method (with a solution heating time far shorter than the conventional 15-30 minutes of industrial solution quenching furnaces, effectively controlling the coarsening of strengthening phases and grain growth, promoting performance improvement; and a cooling time far shorter than the 15-30 seconds of conventional industrial solution quenching furnaces, effectively controlling the precipitation of supersaturated solid solution phases, ensuring improved performance indicators, and significantly inhibiting the precipitation of copper-containing phases at grain boundaries that cause potential increases and lead to electrochemical corrosion) produces aluminum alloy wires for bicycle wheel spokes with a diameter range of 3.0mm-4.0mm. These wires have high surface quality, high room temperature strength, and excellent corrosion resistance. Aluminum alloy spokes manufactured using this method have a tensile strength of not less than 600MPa, a yield strength of not less than 550MPa, an elongation of not less than 8.0%, and corrosion resistance of not less than PA level. Detailed Implementation

[0020] The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

[0021] Specific Implementation Method 1: This implementation method discloses a manufacturing method for ultra-high strength and corrosion-resistant aluminum alloy spokes for bicycles, which is carried out according to the following steps:

[0022] I. Based on the mass percentage of alloying elements as follows: Si: <0.20%, Fe: <0.30%, Cu: 1.8%–2.6%, Mn: <0.05%, Mg: 1.4%–2.3%, Zn: 9.0%–9.6%, Ti: 0.04%–0.06%, Cr: 0.15%–0.25%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710℃–740℃, an aluminum alloy melt is obtained.

[0023] 2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

[0024] 3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 450℃~465℃. Hold it at this temperature for 10h~14h for homogenization annealing.

[0025] 4. After removing the oxide scale from the surface of the aluminum alloy ingot obtained in step 3, the aluminum alloy ingot with a diameter of 405mm is placed in a heating furnace and heated to a temperature of 350℃~420℃.

[0026] 5. The ingots processed in step 4 at a temperature of 350℃~420℃ are extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s~0.6mm / s to obtain bars with a diameter of 145mm.

[0027] 6. Heat the bar material prepared in step 5 to 350℃-380℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill;

[0028] 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing;

[0029] 8. Cold roll the wire processed in step 7 to a diameter of 3.5mm-5.0mm;

[0030] 9. Heat the wires with a diameter of 3.5mm-5.0mm obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing.

[0031] 10. After processing in step nine, control the cold working rate at 35%-40% and cold roll it to a diameter of 3.0mm-4.0mm;

[0032] 11. The cold-rolled strip from step 10 is heated to 460℃-466℃ in 10-20 seconds using induction heating, held at that temperature for 4-5 minutes for solution treatment, and then cooled by air mist to quench to 25℃-35℃ in 3-5 seconds.

[0033] 12. The lines processed in step 11 are subjected to artificial aging treatment to obtain ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles. The aging treatment is carried out in two stages. In the first stage, the aging temperature is controlled at 100℃-107℃ and the holding time is 6.5h-7.0h. In the second stage, the aging temperature is controlled at 160℃-167℃ and the holding time is 17.5-18h.

[0034] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that: in step one, the raw materials are weighed according to the following mass percentages of alloying elements: Si: <0.10%, Fe: <0.15%, Cu: 2.2%, Mn: <0.05%, Mg: 1.8%, Zn: 9.3%, Ti: 0.05%, Cr: 0.20%, individual impurities: <0.05%, total impurities: ≤0.15%, with the balance being Al. Everything else is the same as in Specific Implementation Method One.

[0035] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that: in step three, the aluminum alloy ingot is placed in a heat treatment furnace and heated to a metal temperature of 460°C, and held at that temperature for 12 hours for homogenization annealing. Everything else is the same as in Specific Implementation Method One or Two.

[0036] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that: after the oxide scale on the surface of the aluminum alloy ingot is milled off in step four, it is placed in a heating furnace and heated to an ingot temperature of 385°C. Everything else is the same as in Specific Implementation Methods One to Three.

[0037] Specific Implementation Method Five: This implementation method differs from Specific Implementation Methods One to Four in that: in step six, the bar stock is heated to 365°C and rolled into a wire with a diameter of 8.0 mm using a hot rolling mill. Everything else is the same as in Specific Implementation Methods One to Four.

[0038] Specific Implementation Method Six: This implementation method differs from Specific Implementation Methods One to Five in that: in step eight, the line processed in step seven is cold-rolled to a diameter of 4.4 mm. Everything else is the same as in Specific Implementation Methods One to Five.

[0039] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Methods One to Six in that: in step ten, the cold working rate is controlled at 36.73%, and it is cold-rolled to a direct diameter of 3.5mm. Everything else is the same as in Specific Implementation Methods One to Six.

[0040] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Methods One to Seven in that: in step eight, the wire processed in step seven is cold-rolled to a diameter of 3.8 mm. Everything else is the same as in Specific Implementation Methods One to Seven.

[0041] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Methods One to Eight in that: in step ten, the cold working rate is controlled at 37.67%, and the material is cold-rolled to a diameter of 3.0 mm. Everything else is the same as in Specific Implementation Methods One to Eight.

[0042] Specific Implementation Method Ten: This implementation method differs from Specific Implementation Methods One to Nine in that the water content in the air-mist cooling is 25%, and the water temperature is 17.5℃. Everything else is the same as in Specific Implementation Methods One to Nine.

[0043] The beneficial effects of the present invention are verified using the following embodiments:

[0044] Example 1: A method for manufacturing ultra-high strength and corrosion-resistant aluminum alloy spokes for bicycles, comprising the following steps:

[0045] I. Based on the mass percentage of alloying elements as follows: Si: <0.10%, Fe: <0.15%, Cu: 2.2%, Mn: <0.05%, Mg: 1.8%, Zn: 9.3%, Ti: 0.05%, Cr: 0.20%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710℃~740℃, an aluminum alloy melt is obtained.

[0046] 2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

[0047] 3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 460℃. Hold it at that temperature for 12 hours for homogenization annealing.

[0048] Fourth, after removing the oxide scale from the surface of the aluminum alloy ingot obtained in step three after homogenization and annealing, an aluminum alloy ingot with a diameter of 405mm is obtained and placed in a heating furnace and heated to a temperature of 385℃.

[0049] 5. The ingot with a measured temperature of 385℃ after step 4 is extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s to 0.6mm / s to obtain a bar with a diameter of 145mm.

[0050] 6. Heat the bar material prepared in step 5 to 365℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill;

[0051] 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing;

[0052] 8. Cold roll the wire processed in step 7 to a diameter of 4.4 mm;

[0053] 9. Heat the 4.4mm diameter line obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing.

[0054] 10. After processing in step nine, control the cold working rate at 36.73% and cold roll it to a direct diameter of 3.5mm;

[0055] 11. The wire obtained in step 10 is heated to 463°C within 15 seconds by induction heating, and then held at that temperature for 4-5 minutes for solution treatment. After that, it is cooled by air mist (25% water content, water temperature 17.5°C) and quenched to 30°C within 4 seconds.

[0056] 12. The lines processed in step 11 are subjected to artificial aging treatment. The aging process is divided into two stages. In the first stage, the aging temperature is controlled at 100℃ and the holding time is 7.0h. In the second stage, the aging temperature is controlled at 160℃ and the holding time is 18h, resulting in ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles.

[0057] Example 2: A method for manufacturing ultra-high strength and corrosion-resistant aluminum alloy spokes for bicycles, comprising the following steps:

[0058] I. Based on the mass percentage of alloying elements as follows: Si: <0.10%, Fe: <0.15%, Cu: 2.2%, Mn: <0.05%, Mg: 1.8%, Zn: 9.3%, Ti: 0.05%, Cr: 0.20%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710-740℃, an aluminum alloy melt is obtained.

[0059] 2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

[0060] 3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 460℃. Hold it at that temperature for 12 hours for homogenization annealing.

[0061] 4. After removing the oxide scale from the surface of the aluminum alloy ingot obtained in step 3, the aluminum alloy ingot with a diameter of 405mm is placed in a heating furnace and heated to a temperature of 385℃.

[0062] 5. The ingot with a measured temperature of 385℃ after step 4 is extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s to 0.6mm / s to obtain a bar with a diameter of 145mm.

[0063] 6. Heat the bar material prepared in step 5 to 365℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill;

[0064] 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing;

[0065] 8. Cold roll the wire processed in step 7 to a diameter of 3.8mm;

[0066] 9. Heat the 3.8mm diameter line obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing;

[0067] 10. After processing in step nine, control the cold working rate at 37.67% and cold roll it to a diameter of 3.0 mm;

[0068] 11. The wire obtained in step 10 is heated to 463°C within 15 seconds by induction heating, and then held at that temperature for 4-5 minutes for solution treatment. After that, it is cooled by air mist (25% water content, water temperature 17.5°C) and quenched to 30°C within 4 seconds.

[0069] 12. The lines processed in step 11 are subjected to artificial aging treatment. The aging process is divided into two stages. In the first stage, the aging temperature is controlled at 103.5℃ and the holding time is 6.75h. In the second stage, the aging temperature is controlled at 163.5℃ and the holding time is 17.75h, resulting in ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles.

[0070] Example 3: A method for manufacturing ultra-high strength and corrosion-resistant aluminum alloy spokes for bicycles, comprising the following steps:

[0071] I. Based on the mass percentage of alloying elements as follows: Si: <0.10%, Fe: <0.15%, Cu: 2.2%, Mn: <0.05%, Mg: 1.8%, Zn: 9.3%, Ti: 0.05%, Cr: 0.20%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710-740℃, an aluminum alloy melt is obtained.

[0072] 2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

[0073] 3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 460℃. Hold it at that temperature for 12 hours for homogenization annealing.

[0074] 4. After removing the oxide scale from the surface of the aluminum alloy ingot obtained in step 3, the aluminum alloy ingot with a diameter of 405mm is placed in a heating furnace and heated to a temperature of 385℃.

[0075] 5. The ingot with a measured temperature of 385℃ after step 4 is extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s to 0.6mm / s to obtain a bar with a diameter of 145mm.

[0076] 6. Heat the bar material prepared in step 5 to 365℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill;

[0077] 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing;

[0078] 8. Cold roll the lines processed in step 7 to a diameter of 5.0 mm;

[0079] 9. Heat the 5.0mm diameter line obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing;

[0080] 10. After processing in step nine, control the cold working rate at 36.00% and cold roll it to a diameter of 4.0mm;

[0081] 11. The wire obtained in step 10 is heated to 463°C within 15 seconds by induction heating, and then held at that temperature for 4-5 minutes for solution treatment. After that, it is cooled by air mist (25% water content, water temperature 17.5°C) and quenched to 30°C within 4 seconds.

[0082] 12. The lines processed in step 11 are subjected to artificial aging treatment. The aging process is divided into two stages. In the first stage, the aging temperature is controlled at 107℃ and the holding time is 7 hours. In the second stage, the aging temperature is controlled at 167℃ and the holding time is 18 hours, resulting in ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles.

[0083] Table 1. Laboratory test data (tested according to GB / T 16865-2013 standard)

[0084] Production batch number Product diameter / mm Tensile strength / MPa Yield strength / MPa elongation % Example 1 3.5 605-611 561-564 8.8-9.3 Example 2 3.0 608-612 559-565 8.6-9.5 Example 3 4.0 607-614 562-568 8.5-9.8

[0085] The aluminum alloy spokes prepared in Examples 1 to 3 have a tensile strength of not less than 600 MPa, a yield strength of not less than 550 MPa, and an elongation of not less than 8.0%. At the same time, their corrosion resistance is not lower than PA level (in accordance with the testing standard GB / T 22639-2008), which meets the requirements for use as bicycle wheel spokes.

Claims

1. A method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes, characterized in that... This method is performed in the following steps: I. Based on the mass percentage of alloying elements as follows: Si: <0.20%, Fe: <0.30%, Cu: 1.8%–2.6%, Mn: <0.05%, Mg: 1.4%–2.3%, Zn: 9.0%–9.6%, Ti: 0.04%–0.06%, Cr: 0.15%–0.25%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al, pure aluminum ingots, aluminum-titanium master alloys, aluminum-chromium master alloys, cathode electrolytic copper, magnesium ingots, zinc ingots, and aluminum ingots for remelting are weighed and added to a dry melting furnace. Under conditions of 710℃–740℃, an aluminum alloy melt is obtained.

2. The aluminum alloy molten metal from step 1 is used to produce aluminum alloy round ingots with a diameter of 430 mm by semi-continuous casting under the conditions of casting temperature of 720℃~730℃, casting speed of 60mm / min~65mm / min, cooling water strength of 0.11MPa~0.13MPa, and cooling water temperature of 15℃~25℃.

3. Place the aluminum alloy ingot obtained in step 2 into a heat treatment furnace and heat it to a metal temperature of 450℃~465℃. Hold it at this temperature for 10h~14h for homogenization annealing.

4. After removing the oxide scale from the surface of the aluminum alloy ingot obtained in step 3, the aluminum alloy ingot with a diameter of 405mm is placed in a heating furnace and heated to a temperature of 350℃~420℃.

5. The ingots processed in step 4 at a temperature of 350℃~420℃ are extruded on a 4500-ton hydraulic press at an extrusion speed of 0.2mm / s~0.6mm / s to obtain bars with a diameter of 145mm.

6. Heat the bar material prepared in step 5 to 350℃-380℃ and roll it into a wire with a diameter of 8.0mm using a hot rolling mill; 7. Heat the 8.0mm diameter line obtained in step 6 to 400-420℃ and hold for 10 hours for softening annealing; 8. Cold roll the wire processed in step 7 to a diameter of 3.5mm-5.0mm; 9. Heat the wires with a diameter of 3.5mm-5.0mm obtained in step 8 to 400-420℃ and hold for 10 hours for softening annealing.

10. After processing in step nine, control the cold working rate at 35%-40% and cold roll it to a diameter of 3.0mm-4.0mm; 11. The cold-rolled strip from step 10 is heated to 460℃-466℃ in 10-20 seconds using induction heating, held at that temperature for 4-5 minutes for solution treatment, and then cooled by air mist to quench to 25℃-35℃ in 3-5 seconds.

12. The lines processed in step 11 are subjected to artificial aging treatment to obtain ultra-high strength corrosion-resistant aluminum alloy spokes for bicycles. The aging treatment is carried out in two stages. In the first stage, the aging temperature is controlled at 100℃-107℃ and the holding time is 6.5h-7.0h. In the second stage, the aging temperature is controlled at 160℃-167℃ and the holding time is 17.5-18h.

2. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step one, the raw materials are weighed according to the following mass percentages of alloying elements: Si: <0.10%, Fe: <0.15%, Cu: 2.2%, Mn: <0.05%, Mg: 1.8%, Zn: 9.3%, Ti: 0.05%, Cr: 0.20%, individual impurities: <0.05%, total impurities: ≤0.15%, and the balance being Al.

3. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step three, the aluminum alloy ingot is placed in a heat treatment furnace and heated to a metal temperature of 460°C. It is then held at that temperature for 12 hours for homogenization annealing.

4. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step four, after the aluminum alloy ingot has its surface oxide scale removed by milling, it is placed in a heating furnace and heated to a temperature of 385°C.

5. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step six, the bar stock is heated to 365°C and then rolled into a wire with a diameter of 8.0 mm using a hot rolling mill.

6. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step eight, the lines processed in step seven are cold rolled to a diameter of 4.4 mm.

7. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step ten, the cold working rate is controlled at 36.73%, and the material is cold rolled to a direct diameter of 3.5 mm.

8. The method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step eight, the lines processed in step seven are cold rolled to a diameter of 3.8 mm.

9. A method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, In step ten, the cold working rate is controlled at 37.67%, and the material is cold rolled to a diameter of 3.0 mm.

10. A method for manufacturing an ultra-high strength corrosion-resistant aluminum alloy for bicycle spokes according to claim 1, characterized in that, The water content in the air-cooled mist is 25%, and the water temperature is 17.5℃.