Why is it not recommended to use secondary recycled aluminum for wheel hub production?
The following are the main reasons why secondary recycled aluminum cannot be used directly for wheel hub production:
Technical challenge
1. Composition and quality control:
The composition of recycled aluminum is complex, containing a variety of impurity elements, such as Fe(iron), etc., the content of these impurities will increase after multiple cycles, affecting the performance of aluminum alloys. For automotive wheels, the composition and metallurgical quality of aluminum alloy are extremely high to ensure its high strength, high corrosion resistance and good mechanical properties. The existing recycled aluminum technology is difficult to accurately control the alloy composition, especially in the separation and purification process, which is easy to lead to the instability of aluminum alloy properties.
2. Lack of purification process:
The recycled aluminum is easily oxidized in the smelting process, resulting in secondary pollution, which affects the purity of the aluminum alloy. The existing purification process is not yet perfect, and it is difficult to completely remove impurities, especially harmful impurities such as Fe, which reduce the strength and corrosion resistance of aluminum alloys.
3. Low temperature melting technology is insufficient:
The melting temperature of recycled aluminum is low, but the melted aluminum material is easy to solidify at low temperatures, resulting in lower melting efficiency. Low temperature melting may also lead to insufficient discharge of gases and inclusions in liquid aluminum, affecting the quality of aluminum alloys.
Quality problem
1. Unstable performance: Because the composition and metallurgical quality of recycled aluminum are difficult to control, the performance of the produced wheel is unstable, and there may be safety risks. As an important part of the car, the wheel hub carries all the weight of the car, and its performance is directly related to the safety and stability of the car. 2. Prone to defects:
Recycled aluminum is prone to defects such as pores and inclusions during smelting and casting, which will reduce the strength and corrosion resistance of the wheel hub. Defects may also lead to serious problems such as cracks and fractures in the wheel hub during use, threatening the safety of the car.
Environmental protection property
1. Environmental pressure:
The production process of recycled aluminum will produce a lot of waste gas and waste residue and other pollutants, causing a certain pressure on the environment. If the emission and treatment of pollutants can not be effectively controlled, the environmental protection image and sustainable development ability of enterprises will be seriously affected.