The difference between magnesium alloy wheels and aluminum alloy wheels
1. Material characteristics
Density and weight: The density of magnesium alloy is low, about 1.8g/cm³, and the density of aluminum alloy is high, about 2.7g/cm³. Therefore, magnesium alloy wheels of the same volume are relatively light, usually about 20%-30% lighter than aluminum alloy wheels. This lightweight feature makes magnesium alloy wheels more advantageous in racing vehicles and high-performance models.
Strength and elasticity: The strength of aluminum alloy wheels is relatively high, but magnesium alloy wheels have better seismic performance and elasticity. This feature makes the magnesium alloy wheel can produce a better buffer effect during the driving process, reduce the body bumps and vibrations.
Heat conductivity: Magnesium alloy wheels have a high heat conductivity which helps to reduce the temperature of the brake system and improve brake performance. The thermal conductivity of aluminum alloy wheels is also better, but it may be slightly inferior compared with magnesium alloy.
2. Manufacturing process
Magnesium alloy wheels: Generally made by casting process, this process can produce complex shapes of wheels, but compared to forging and die casting process, its density and durability may be slightly inferior.
Aluminum alloy wheels: forging and die casting processes are often used. Forging and die casting processes can produce denser, more durable wheels with greater manufacturing accuracy and deformation control.
3. Performance
Lightweight and Fuel economy: The lightweight nature of magnesium alloy wheels helps reduce the overall weight of the car, which improves fuel economy and handling performance. Aluminum alloy wheels also have the characteristics of lightweight, but in some application scenarios may not be as significant as magnesium alloy wheels.
Handling: Due to the lightweight nature of magnesium alloy wheels, it can significantly reduce the center of gravity of the vehicle, thus improving handling performance. Aluminum wheels, while also helping to improve handling, may be slightly inadequate in comparison.
4. Cost and application scenarios
Cost: The cost of magnesium alloy wheels is relatively high, which is mainly due to the combined effect of factors such as material cost, manufacturing process complexity and market demand. Although the cost of aluminum alloy wheels is also higher, it may be more popular and economical than magnesium alloy wheels.
Application scenario: Magnesium alloy wheels are often used in racing vehicles and high-performance models because of their lightweight, high shock resistance and high elasticity. The aluminum alloy wheels occupy a dominant position in the market because of their wide applicability and economy, and are suitable for various types of cars.
In general, magnesium alloy wheels have advantages in lightweight and strength, but the cost is high and the corrosion resistance is poor. The aluminum alloy wheels have advantages in cost, beauty and corrosion resistance, but the weight is heavier. According to different application needs and budgets, consumers can choose the right wheel materials.