How much do you know about famous cars burned into aluminum ingots and aluminum bodies?

Safety and environmental protection are the advantages of aluminum body. For cars, ensuring the safety of the people in the car is always the first priority. No matter how powerful the vehicle is and how beautiful the appearance is, it is meaningless if the safety of the people in the car cannot be guaranteed to a large extent.

A piece of news was spread on Weibo-a Land Rover Range Rover had an accident and its body was burned directly. The reason why this Weibo was quickly spread is because this Range Rover uses an all-aluminum body, so it will be burned. We have seen that some netizens think that aluminum body has no advantages because it will be burned, so is this idea right? Let's have a brief chat today.

First of all, we want to emphasize that the emergence of aluminum body is a progress in the development of automobile manufacturing industry. Why do you say that? Let's take a look at its main advantages:

1. Lightweight

For reference, a piece of hood outer panel made of steel plate with a thickness of 0.75mm weighs 8.5kg. If 1mm aluminum plate is used to make the same hood outer panel, its weight is only 3.9kg, and the light weight rate reaches 54%. Also give you a data, if the body every 100kg, then every hundred kilometers can save fuel 0.4-1.0L (in different engines and different conditions will be different).

Through the above two data, we can see that the lightweight characteristics of the aluminum body will play a significant role in environmental protection, because reducing fuel consumption means reducing emissions.

2. High recovery rate

For car owners, this factor may not have a very obvious feeling, the main advantage of this feature is still reflected in environmental protection. The parts of aluminum cars can basically be recycled, and the energy consumption required for recycling is very low. In addition, aluminum is a material that can be recycled many times (the performance of aluminum itself will not change much after repeated recycling), so it is more environmentally friendly than iron and steel.

3, high security

Aluminum's energy absorption performance is quite good, and it has obvious advantages over steel bodies in collisions. After a collision at the front of the vehicle, the deformation zone at the front of the collision position will produce wrinkles and absorb a large amount of impact, thereby protecting the seating area. At the same time, due to the reduction of the body mass, the kinetic energy generated during a collision will be relatively weakened, which also reduces the impact force to a certain extent.

In summary, safety and environmental protection are the advantages of aluminum bodies. For cars, ensuring the safety of the people in the car is always the first priority. No matter how powerful the vehicle is and how beautiful the appearance is, it is meaningless if the safety of the people in the car cannot be guaranteed to a large extent. The aluminum body has a natural advantage in terms of safety, and its excellent performance in environmental protection also reduces the damage of the car to the environment, so the aluminum body is worthy of our recognition. Of course, the all-aluminum body is not completely without weaknesses, such as the following two points:

1. High manufacturing cost

Because the local ductility of aluminum alloy plate is not good, it is easy to produce cracks. At the same time, the resilience of aluminum is difficult to control. It is necessary to adopt a shape with less springback when designing the shape. These characteristics will cause the production cost of aluminum body to be high, which is not enough for large-scale promotion. At present, it will only be applied to vehicle models.

2. High repair cost

After the impact deformation, because the aluminum repair technology threshold is relatively high, so the aluminum body sheet metal repair is significantly more difficult than the steel body, resulting in high maintenance costs.

On the whole, the problem with aluminum car bodies lies in two words-cost. Not only is the manufacturing cost high, but the later maintenance cost is not low, and these costs will eventually be passed on to consumers.

As for the Land Rover Range Rover in this incident, the cause of its combustion has not yet been known, so it is not possible to throw all the causes of the problem to the aluminum body. This is a very one-sided view. Besides, for car owners, whether it is burned into a pile of steel ingots or burned into a pile of aluminum ingots, what is the difference?

As for why the aluminum body will burn like this while the iron and steel body will not burn like this? The reason lies in the melting point. The melting point of aluminum alloy is generally 600 ℃. When the vehicle spontaneously ignites and burns in the oil circuit, fuel tank, etc., it can reach about 700-800 ℃, which can completely melt the aluminum body, so there will be a burning scene. In contrast, the melting points of iron and steel are much higher. The melting point of iron is about 1200°C, and steel has reached the range of 1300-1400°C. This is why the body of this material is often burned. It will be seen that a frame is retained, and the aluminum body will melt away.

At this point, let's give you another suggestion, that is, under any circumstances, life is more precious than a car. Once a vehicle is found to start spontaneous combustion, it is necessary to immediately judge whether it can extinguish the fire by itself. For example, the fire in the car caused by cigarette butts, lighters, etc. is relatively easy to control in the initial stage, it is possible to consider using a fire extinguisher to extinguish the fire by itself (so the fire extinguisher is placed in a location that is easily accessible in the car). But if the engine compartment is burning, then we must give up the idea of fire fighting and evacuate as soon as possible!