Magnesium alloy forgings have the following advantages and development potential in metro traffic: Lightweight advantage: Magnesium alloy is one of the lightest structural metal materials at present, and has been widely used in aerospace and automotive industries. In subway traffic, the use of magnesium alloy forgings can reduce the overall weight of vehicles, improve energy efficiency, reduce energy consumption and environmental pollution. Strength advantages: Although magnesium alloys are lighter than aluminum alloys, their strength can still be comparable to that of some steels. Therefore, the use of magnesium alloy forgings can provide sufficient strength and stiffness to ensure the structural safety of subway vehicles. Corrosion resistance: Subway vehicles often operate in humid, dusty, high humidity and other harsh environments, so the material needs to have good corrosion resistance. Magnesium alloy has good corrosion resistance and can effectively resist corrosion and oxidation in humid environment. High thermal conductivity: The electrical equipment, braking system and transmission system of subway vehicles will generate a lot of heat during the working process, which needs to be cooled. Magnesium alloy has good thermal conductivity, which can effectively transfer and disperse heat and improve the thermal management effect of subway vehicles. Plasticity and processability: Magnesium alloy is easy to process, and complex shapes can be obtained by forging and other processes. This plasticity and processability allow magnesium alloy forgings to meet the various structural requirements of metro vehicles and can be precisely controlled to improve the quality of parts. Although magnesium alloy forgings have the above advantages in the field of metro transportation, they also face some challenges and limitations, such as the high cost of magnesium alloys, poor weldability and stability in high temperature environments. Therefore, these factors need to be considered comprehensively in practical applications, and reasonable selection and optimization design should be carried out in combination with specific needs. With the progress of science and technology and the improvement of material technology, the application prospect of magnesium alloy forgings in the field of subway traffic is still very broad, and will continue to receive attention and promote the development.
