Replacing an aluminum alloy piece means cutting and joining it. When cutting aluminum alloy plates, only cold cutting can be performed with a special cutting machine, just like cutting paper with scissors. When joining aluminum alloy sheets, welding is not possible and must be bonded or riveted. The reason is that the melting point of the aluminum alloy is too low, and the heat treatment causes deformation. The so-called bonding here is actually literally, using a special adhesive to glue the aluminum alloy.
Moreover, if an aluminum material is made of aluminum-magnesium alloy, that is, there is magnesium inside, it will melt once it is exposed to high temperature, and the fire will splash.
However, when the aluminum alloy body is repaired, welding may still be used. As a chemically active metal, aluminum alloy is easily oxidized, and cracks are easily generated during welding, which affects the strength of solder joints.
After the repair is completed, due to the vibration of the body during daily driving, the solder joints will gradually loosen and bring certain safety hazards. Therefore, the welding of aluminum alloys has high standards for cleanliness requirements, as well as voltage and wire requirements.
If the proportion of your car's aluminum alloy is high, be sure to drive carefully. Now there are still a few aluminum alloy parts, which poses challenges for maintenance difficulty and cost. The general 4S shop does not have such maintenance conditions, so it is the most efficient way to directly replace the original parts.
Brands such as Jaguar and Land Rover have always tended to build aluminum alloy bodies; now Cadillac has also begun to popularize aluminum alloy materials. Therefore, we often hear models of brands such as Mercedes-Benz. After domestic production, some body panels are simply matched with steel from aluminum alloy, which is not a bad thing.
If you drive a million-class luxury car, there is no doubt that the doors, fenders and other covers, as well as the frame are aluminum. If the structural parts of the car are damaged, the residual value of the car as a used car will be greatly reduced after maintenance. Because of the welding, bonding or riveting, the aluminum alloy parts are not as strong as the original forging.
