Five Advantages Create the Inevitable Development of Aluminum for Automobiles

The wide application of aluminum alloy sheets is inseparable from the unique chemical composition and properties. The emergence of aluminum alloys has become the king of production applications, and its predecessor, metal iron, was a very important metal in production applications before that. However, the emergence of aluminum has gradually replaced the king of iron. This article compares the advantages and disadvantages of aluminum and iron, and introduces how aluminum for automobiles has become the first metal for production and application:

1. The weight advantage of aluminum for automobiles The specific gravity of aluminum is smaller than that of cast iron, and under the premise of meeting the strength requirements, aluminum is much lighter. In the engine of the car, the engine is light, which can have a positive effect on the weight distribution of the whole vehicle, and the weight of the whole vehicle is also lighter. Therefore, the aluminum cylinder block is dominant at this point.
2. The volume advantage of aluminum for automobiles For the same reason, the specific gravity of aluminum is small, and the structural strength of aluminum per unit volume is smaller than that of cast iron, so the aluminum cylinder block is usually larger in size. But about 40 lighter
3. The advantages of corrosion resistance and strength of aluminum for automobiles Aluminum is easy to chemically react with water generated during combustion, and its corrosion resistance is not as good as that of cast iron cylinders, especially for supercharged engines with higher temperature and pressure. At this point, the cast iron cylinder is dominant.
4. Advantages of anti-knock and heat dissipation of aluminum for automobiles Aluminum conducts heat faster, so it has good cooling performance, which can help the engine reduce the probability of abnormal combustion. The same compression ratio, the aluminum block engine can be compared with the cast iron block engine. Use lower grade gasoline. At this point, the aluminum cylinder block is dominant.
5. Advantages of the friction coefficient of aluminum for automobiles In order to reduce the inertia of the reciprocating parts and improve the rotational speed and response speed, most of the pistons use aluminum alloys as materials. The cylinder wall is cast iron, the friction coefficient between aluminum and iron will be reduced accordingly, which is good for the performance of the engine. Some so-called all-aluminum engines also use cast iron cylinder liners. In this regard, the advantages of the aluminum cylinder block and the iron cylinder block are equally divided.