In the context of the global automotive industry's pursuit of energy conservation, emission reduction, and intelligent upgrading, chassis parts, as the core load-bearing and safety components of vehicles, are facing increasingly stringent requirements for comprehensive performance. Magnesium-aluminum alloy, with its inherent advantages of low density and high specific strength, has become a key material for lightweight chassis manufacturing. However, the application of magnesium-aluminum alloy in chassis parts has long been restricted by the contradiction between lightweight and high strength—simple material substitution often leads to insufficient structural strength and poor fatigue resistance. Precision forging technology, relying on its advanced forming principle and precise process control, has successfully broken through this bottleneck, endowing magnesium-aluminum alloy chassis parts with dual advantages of ultra-lightweight and high reliability.    

The core advantage of precision forging in optimizing magnesium-aluminum alloy chassis parts lies in its precise regulation of the material's microstructure. Magnesium-aluminum alloy has a hexagonal close-packed (HCP) lattice structure, which has limited slip systems and makes plastic deformation at low temperatures challenging. During the precision forging process, under the action of controlled high pressure and appropriate temperature, the coarse-grained structure of the as-cast magnesium-aluminum alloy is thoroughly refined into an ultrafine-grained structure. This grain refinement not only increases the number of grain boundaries to hinder dislocation movement, thereby significantly improving the yield strength and hardness of the material, but also enhances the uniformity of the material structure, optimizing its ductility and toughness simultaneously. For key chassis components such as subframes and front lower control arms, precision forging can make the tensile strength of magnesium-aluminum alloy reach more than 350MPa, with an elongation rate greater than 10%, fully meeting the strict performance requirements of safety components.    

In terms of lightweight implementation, precision forging technology achieves efficient weight reduction through both material advantages and structural optimization. The density of magnesium-aluminum alloy is only two-thirds that of aluminum and one-fourth that of steel. On this basis, precision forging realizes near-net shaping of chassis parts, minimizing material waste while enabling the design of more reasonable hollow or thin-walled structures. Compared with traditional steel stamping and welding chassis parts, precision-forged magnesium-aluminum alloy subframes can achieve a weight reduction effect of about 40%, and front lower control arms can reduce weight by more than 30%. For new energy vehicles, this lightweight effect is particularly critical—it can reduce the load of the power battery system, increase the cruising range by 5%-10% when the vehicle weight is reduced by 20%, and simultaneously improve the dynamic performance and handling stability of the vehicle.    

The reliable performance of precision-forged magnesium-aluminum alloy chassis parts has been fully verified in practical applications. In the manufacturing process, advanced process monitoring and quality control systems ensure the stability of each forging link, making the mechanical properties of the parts highly consistent. In high-speed driving, emergency braking, and other complex working conditions, these chassis parts can effectively absorb vibration and impact energy, relying on their excellent shock absorption and energy absorption capabilities, reducing the noise, vibration, and harshness (NVH) of the whole vehicle. At the same time, through targeted surface treatment and anti-corrosion processes, the problem of poor corrosion resistance of magnesium-aluminum alloy is solved, ensuring the service life of the parts in harsh environments such as humidity and salt spray.    

Looking forward to the future, with the continuous advancement of precision forging technology, the application of magnesium-aluminum alloy chassis parts will be more extensive. The combination of multi-directional forging, high-strain-rate forging and other advanced processes will further improve the comprehensive performance of the parts, making them meet the higher requirements of the automotive industry for safety and lightweighting. Meanwhile, as the cost of magnesium-aluminum alloy materials gradually decreases and the recycling technology becomes more mature, precision-forged magnesium-aluminum alloy chassis parts will become an important support for the sustainable development of the automotive industry, contributing more to the realization of global energy conservation and emission reduction goals.