Wheel hubs can be divided into steel wheels and alloy wheels according to the material, and each has its own advantages and disadvantages.
The main advantage of steel wheels is that the manufacturing process is simple (generally using casting process, for example, aluminum alloy wheels are generally produced by low-pressure casting process), the cost is relatively low, and the ability to resist metal fatigue is very strong, which is what we commonly call cheap and cheap. solid. However, the disadvantages of steel wheels are relatively prominent: ugly appearance (it can be said that there is no appearance at all), heavy weight (the same wheel hub steel material is much heavier than aluminum alloy material), large inertial resistance, and poor heat dissipation. And very easy to rust. 
Alloy wheel hubs can just make up for this problem, light weight, small inertial resistance, high manufacturing precision, small deformation during high-speed rotation, small inertial resistance, which is conducive to improving the straight-line driving performance of the car and reducing the rolling resistance of tires, thereby Reduced fuel consumption. The thermal conductivity of the alloy material is about three times that of steel, and the heat dissipation is good, which can play a certain role in the thermal attenuation of the vehicle's braking system, tires and braking system. The alloy wheels of the original cars on the market are mainly made of aluminum alloy. Of course, many modified wheels will choose chromium, titanium and other elements as the basic materials in order to meet certain special requirements and improve the vision. However, compared with steel wheels, the price of alloy wheels is much more expensive, so often in many low-end and mid-level original cars, steel wheels will appear on low-end models, while alloy wheels are high-end models. Standard on the model.

 

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Wheel  Hub Assembly