In the field of new energy vehicles, the material selection and manufacturing process of die castings have a crucial impact on the quality, efficiency, and safety of vehicles. For example, the material selection of die castings should meet the mechanical and electrical properties, which requires in-depth research on alloy materials. At the same time, in order to ensure the reliability and lightweight of automobiles, die-casting technology is constantly breaking through and developing, such as the application of new technologies such as multi-media die-casting, high-pressure liquid metal mold casting, and plasma arc die-casting.
Why do new energy vehicles use die-casting parts?
- Improve the strength of the body structure: Die-casting parts can significantly improve the strength and rigidity of the body structure due to their high density and uniform structure, which is very important for the safety and durability of new energy vehicles.
- Reduce weight: New energy vehicles need to reduce their own weight to improve battery life. The use of die-casting technology can reduce the weight of parts, reduce the weight of the vehicle body, and optimize vehicle performance.
- Improve the overall quality and appearance of the car body: Die-casting parts have high precision and smooth surface, which can make the quality and appearance of the whole car body more balanced and beautiful, improve user satisfaction, and increase its market competitiveness.
- Improve production efficiency: The production of new energy vehicles requires a large number of spare parts. The use of die-casting technology can achieve mass production, improve production efficiency, and minimize production costs.
- Sustainability: Die-casting technology has relatively little impact on the environment, and can realize the reusability and recycling of parts, which meets the sustainable development requirements of new energy vehicles.
Use of materials with many die-cast parts
Aluminum alloy
Aluminum alloy is light, strong, durable, and renewable, and is one of the materials often used in new energy vehicles. Aluminum alloy die-casting parts can reduce the weight of the vehicle and improve the mileage of the vehicle while ensuring product quality.
Magnesium alloy
Magnesium alloy has light density, corrosion resistance, good mechanical properties, and electrical conductivity. In new energy vehicles, magnesium alloy die-casting parts can replace some aluminum alloy parts, reduce the weight of the vehicle and improve vehicle performance.
Carbon fiber composite materials
Carbon fiber composite materials have the characteristics of high strength, lightweight, and corrosion resistance, and are widely used in body parts, wheel hubs, and other components in new energy vehicles. Due to the difficulty of manufacturing carbon fiber, the production cost of parts is also high.
Titanium alloy
Titanium alloy has high strength, corrosion resistance, and other properties, as well as good toughness and plasticity. In new energy vehicles, titanium alloy die-casting parts can improve the reliability and safety of the vehicle, but its manufacturing cost is high, so its use is relatively limited.
Application of Die Casting Parts for New Energy Vehicles
- Battery casing: The battery casing of electric vehicles usually requires aluminum alloy die-casting parts. Aluminum alloy has excellent conductivity and good strength, which can ensure the stability and safety of the battery.
- Body parts: The body parts of new energy vehicles are mostly made of aluminum alloy die-casting parts, such as wheels, frames, etc. This material not only has good performance but also has lighter weight and better environmental protection performance.
- Engine casing: Although new energy vehicles do not have engines in the traditional sense, there are still similar mechanical components in some models such as hybrid vehicles. The casings of these components usually require die-casting of aluminum alloy and other materials.
- Suspension system: The suspension system of new energy vehicles has relatively high requirements for comfort and stability. Die-casting parts such as aluminum alloy are usually used to ensure their performance.
- Braking system: The braking system of new energy vehicles also needs to use some aluminum alloy die-casting parts, such as brake parts.
In general, there are a wide variety of die-casting parts for new energy vehicles, which are widely used in various fields such as body, frame, engine casing, suspension, and brakes.
Common surface treatment methods for die castings used in new energy vehicles
- Spraying: It is often used to protect and beautify the surface of aluminum alloy parts, such as spraying anti-corrosion paint, color paint, etc.
- Electrophoretic coating: suitable for large-area aluminum alloy parts, which can achieve uniform paint film thickness, coating quality, and surface finish.
- Anti-oxidation treatment: It is suitable for materials such as aluminum alloy and magnesium alloy, which can improve the corrosion resistance and mechanical properties of the surface.
- Heat treatment: It is suitable for aluminum alloy, magnesium alloy, and other materials, which can improve its mechanical properties and fatigue life of materials.
- Polishing: It is often used to improve the surface finish and aesthetics of aluminum alloy parts and is suitable for interior and exterior parts.
- Sandblasting: It is often used to improve the surface roughness of aluminum alloy parts and reduce surface reflection, and is suitable for appearance parts and mechanical parts.
In the future, the development of new energy vehicles will also drive the development of the die-casting industry. A good supply chain, excellent corporate management, and high-precision manufacturing technology will be an important part of the industry's competitive advantage. Die-casting manufacturing enterprises need to pay more attention to product quality, efficiency, and safety, and strengthen process management and continuous innovation to meet the continuous changes and upgrades of the market. This will be the necessary way of thinking and hard work in the future development of the new energy vehicle die-casting industry.