Aluminum alloy hub manufacturing heat treatment method
By optimizing the heat treatment process of aluminum alloy wheel hubs, including heating, annealing, normalization, quenching and tempering, the problem of insufficient mechanical performance of aluminum alloy wheel hubs is solved, the wear resistance and corrosion resistance are improved, energy costs are reduced, and the needs of new energy vehicles are met.
Patent Information
- Application Number
- CN202510692036.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-07-18
AI Technical Summary
The mechanical properties of existing aluminum alloy wheels are insufficient, especially in terms of strength, wear resistance and corrosion resistance, and the heat treatment process efficiency is low, which cannot meet the development needs of new energy vehicles.
Specific heat treatment steps are adopted, including heating, annealing, normalizing, quenching and tempering, combined with vacuum heat treatment furnace and water medium quenching, to optimize treatment parameters such as temperature and time to ensure a clean hub surface.
It improves the hardness and toughness of aluminum alloy wheels, improves wear and corrosion resistance, reduces energy usage costs, and improves heat treatment efficiency.
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of wheel hub manufacturing, and particularly relates to a heat treatment method for manufacturing aluminum alloy wheel hubs. Background Technique
[0002] Common automobile wheel hubs include steel wheel hubs and aluminum alloy wheel hubs. Steel wheel hubs have high strength and are commonly used in large trucks. However, steel wheel hubs are heavy in mass and have a single appearance, which does not conform to the current low-carbon and fashionable concept, and have gradually been replaced by aluminum alloy wheel hubs. In the manufacturing process of aluminum alloy wheel hubs, heat treatment is an extremely important link, which directly affects the strength and wear resistance of aluminum alloy wheel hubs. With the development of the automobile industry, automobile manufacturers need wheel hubs with better mechanical properties, higher strength, and stronger wear and corrosion resistance for the vehicle running system. In addition, with the rapid development of new energy vehicles today, the production efficiency of wheel hubs is also one of the important factors affecting the development of new energy vehicle manufacturers. Summary of the Invention
[0003] In order to make up for the deficiencies of the prior art, the present invention provides a heat treatment method for manufacturing aluminum alloy wheel hubs.
[0004] The present invention is realized through the following technical solutions: A heat treatment method for manufacturing aluminum alloy wheel hubs, characterized in that it includes the following steps: (1), heating the wheel hub to 530 - 550 °C and holding for 3.5 - 4.5 h; (2), annealing the heated wheel hub, the annealing temperature is 330 - 340 °C, and the annealing time is 1.9 - 2.1 h; (3), normalizing the annealed wheel hub, the time is 0.6 - 0.8 h; (4), quenching the normalized wheel hub, the quenching temperature is 60 - 80 °C, and the time is 2.8 - 3.2 h; (5), tempering the quenched wheel hub, the tempering temperature is 590 - 600 °C, and the time is 6 - 8 h.
[0005] Preferably, in step (1), before heating the wheel hub, first remove the oil stains and debris on the surface of the wheel hub to ensure that the surface of the wheel hub is completely clean.
[0006] Preferably, in step (1), heat the wheel hub to 540 °C and hold for 4 h.
[0007] Preferably, in step (2), the annealing temperature is 335 °C and the annealing time is 2 h.
[0008] Preferably, in step (3), the normalizing time is 0.7 h.
[0009] Preferably, in step (4), the quenching medium is water.
[0010] Preferably, in step (4), the quenching temperature is 70 °C and the time is 3 h.
[0011] Preferably, in step (5), the tempering temperature is 595 °C and the time is 7 h.
[0012] Preferably, in steps (1) and (2), the heating and annealing treatments are carried out in a vacuum heat treatment furnace.
[0013] The beneficial effects of the present invention are as follows: the aluminum alloy particles of the blank hub are refined, the hardness of the hub is improved while the surface uniformity is better, the toughness, wear resistance and corrosion resistance of the hub are improved, and the vacuum heat treatment is adopted to improve the efficiency of the heat treatment, reduce the energy use cost, and improve the mechanical properties of the product. Detailed implementation manners
[0014] Example 1: Remove the oil stains, debris, etc. on the surface of the hub to ensure that the surface of the hub is completely clean. In a vacuum heat treatment furnace, heat the hub to 530 °C and keep it warm for 3.5 h; perform annealing treatment on the heated hub, the annealing temperature is 330 °C, and the annealing time is 1.9 h. Perform normalizing treatment on the annealed hub for 0.6 h. Quench the normalized hub in water, the quenching temperature is 60 °C, and the time is 2.8 h. Perform tempering treatment on the quenched hub, the tempering temperature is 590 °C, and the time is 6 h.
[0015] Example 2: Remove the oil stains, debris, etc. on the surface of the hub to ensure that the surface of the hub is completely clean. In a vacuum heat treatment furnace, heat the hub to 550 °C and keep it warm for 4.5 h; perform annealing treatment on the heated hub, the annealing temperature is 340 °C, and the annealing time is 2.1 h. Perform normalizing treatment on the annealed hub for 0.8 h. Quench the normalized hub in water, the quenching temperature is 80 °C, and the time is 3.2 h. Perform tempering treatment on the quenched hub, the tempering temperature is 600 °C, and the time is 8 h.
[0016] Example 3: Remove the oil stains, debris, etc. on the surface of the hub to ensure that the surface of the hub is completely clean. In a vacuum heat treatment furnace, heat the hub to 540 °C and keep it warm for 4 h; perform annealing treatment on the heated hub, the annealing temperature is 335 °C, and the annealing time is 2 h. Perform normalizing treatment on the annealed hub for 0.7 h. Quench the normalized hub in water, the quenching temperature is 70 °C, and the time is 3 h. Perform tempering treatment on the quenched hub, the tempering temperature is 595 °C, and the time is 7 h.
[0017] Example 4: Remove oil stains, debris, etc. on the surface of the hub to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 530 °C and hold for 4.5 h; anneal the heated hub, the annealing temperature is 330 °C, and the annealing time is 2.1 h. Normalize the annealed hub for 0.6 h. Quench the normalized hub in water, the quenching temperature is 60 °C, and the time is 3.2 h. Temper the quenched hub, the tempering temperature is 590 °C, and the time is 8 h.
[0018] Example 5: Remove oil stains, debris, etc. on the surface of the hub to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 550 °C and hold for 3.5 h; anneal the heated hub, the annealing temperature is 340 °C, and the annealing time is 1.9 h. Normalize the annealed hub for 0.6 h. Quench the normalized hub in water, the quenching temperature is 80 °C, and the time is 2.8 h. Temper the quenched hub, the tempering temperature is 600 °C, and the time is 6 h.
[0019] Example 6: Remove oil stains, debris, etc. on the surface of the hub to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 530 °C and hold for 4.5 h; anneal the heated hub, the annealing temperature is 330 °C, and the annealing time is 2.1 h. Normalize the annealed hub for 0.7 h. Quench the normalized hub in water, the quenching temperature is 60 °C, and the time is 3.2 h. Temper the quenched hub, the tempering temperature is 590 °C, and the time is 8 h.
[0020] Example 7: Remove oil stains, debris, etc. on the surface of the hub to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 530 °C and hold for 4.5 h; anneal the heated hub, the annealing temperature is 330 °C, and the annealing time is 2.1 h. Normalize the annealed hub for 0.8 h. Quench the normalized hub in water, the quenching temperature is 60 °C, and the time is 3.2 h. Temper the quenched hub, the tempering temperature is 590 °C, and the time is 8 h.
[0021] Example 8: Remove the oil stains, debris, etc. on the hub surface to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 550 °C and hold for 3.5 h; anneal the heated hub at an annealing temperature of 340 °C for 1.9 h. Normalize the annealed hub for 0.7 h. Quench the normalized hub in water at a quenching temperature of 80 °C for 2.8 h. Temper the quenched hub at a tempering temperature of 600 °C for 6 h.
[0022] Example 9: Remove the oil stains, debris, etc. on the hub surface to ensure that the hub surface is completely clean. In a vacuum heat treatment furnace, heat the hub to 550 °C and hold for 3.5 h; anneal the heated hub at an annealing temperature of 340 °C for 1.9 h. Normalize the annealed hub for 0.8 h. Quench the normalized hub in water at a quenching temperature of 80 °C for 2.8 h. Temper the quenched hub at a tempering temperature of 600 °C for 6 h.
Claims
1. A heat treatment method for manufacturing aluminum alloy wheels, characterized in that: It includes the following steps: (1) Heat the hub to 530 - 550 °C and hold for 3.5 - 4.5 h; (2) Anneal the heated hub, with the annealing temperature at 330 - 340 °C and the annealing time at 1.9 - 2.1 h; (3) Normalize the annealed hub for 0.6 - 0.8 h; (4) Quench the normalized hub, with the quenching temperature at 60 - 80 °C and the time at 2.8 - 3.2 h; (5) Temper the quenched hub, with the tempering temperature at 590 - 600 °C and the time at 6 - 8 h.
2. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (1), before heating the hub, first remove the oil stains and debris on the hub surface to ensure the hub surface is completely clean.
3. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, wherein: In step (1), heat the hub to 540 °C and hold for 4 h.
4. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (2), the annealing temperature is 335 °C and the annealing time is 2 h.
5. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (3), the normalizing time is 0.7 h.
6. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (4), the quenching medium is water.
7. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (4), the quenching temperature is 70 °C and the time is 3 h.
8. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1, characterized in that: In step (5), the tempering temperature is 595 °C and the time is 7 h.
9. The heat treatment method for manufacturing aluminum alloy wheels according to claim 1 is characterized in that: In steps (1) and (2), the heating and annealing treatments are carried out in a vacuum heat treatment furnace.