Research on The Application of Magnesium Alloy on High -speed Guide Rails of Railway Transportation

At present, in high -speed rail transit railways, light aluminum alloys are usually used for vehicle structures. However, in recent years, with the increase of railway speed and the importance of energy conservation, the demand for reducing weight has been further increased. The proportion of magnesium is more than 30%smaller than aluminum. As a material that reduces weight, it has attracted much attention. It is expected that not only the railway, but also the large structure of magnesium alloy in the automotive and aerospace fields will be put into actual application as soon as possible. However, due to the relatively low flame retardant, corrosion resistance and plasticity, it is usually used for small components, such as electronic shells and mechanical components, rarely applied to large structures.

At present, in high -speed rail transit railways, light aluminum alloys are usually used for vehicle structures. However, in recent years, with the increase of railway speed and the importance of energy conservation, the demand for reducing weight has been further increased. The proportion of magnesium is more than 30%smaller than aluminum. As a material that reduces weight, it has attracted much attention. It is expected that not only the railway, but also the large structure of magnesium alloy in the automotive and aerospace fields will be put into actual application as soon as possible. However, due to the relatively low flame retardant, corrosion resistance and plasticity, it is usually used for small components, such as electronic shells and mechanical components, rarely applied to large structures.

Magnesium alloy is the lightest of practical metals because it has excellent specific strength and has attracted much attention with CFRP (carbon fiber enhanced plastic) as the next generation of structural materials. Compared with defects. In order to improve these, it is effective to add rare earth to the alloy, but adding rare earth will increase the cost of material, so it is limited to a small number of applications. Therefore, in order to develop magnesium alloys with excellent flame retardability and processed (especially ductility), in order to be applied to railway vehicle components, it is necessary to achieve through low/no rare soil.

Future plan

The expert team of the National Engineering Research Center of Shanghai Jiaotong University light alloy precision molding National Engineering Research Center through material development (raw materials and alloys), processing and bonding, anti -corrosion, and some structure manufacturing methods and evaluations, the evaluation of fatigue intensity in the design of safety life has been proven Light alloy design technology has reached the scope of actual application.

On the other hand, the structure of the use of flame retardant magnesium alloy is important for practical applications and requires major capital investment, because the total length of 20 meters to 25 meters is essential. This is essential for pioneering flame -retardant magnesium alloy market and mature to the investment environment. Therefore, the application example of increasing vehicle interior materials and equipment covers is being promoted to dig the needs of unused flame -retardant magnesium alloys from the high -speed rail field manufacturing.