The first batch of carbon fiber composite heavy-haul railway wagons rolled off the assembly line!

Rail Transit Exhibition News On September 10, China's first batch of carbon fiber composite lightweight heavy-haul railway wagons officially rolled off the assembly line. This marks a major breakthrough in the R&D and application of heavy-haul railway mobile equipment in China, and has important demonstration significance for promoting the green and low-carbon transformation of heavy-haul railway transportation in China.

In the field of rail transit technology, the lightweight of vehicles, that is, reducing the weight of the vehicle as much as possible and reducing the energy consumption of operation on the premise of ensuring the performance of the vehicle, is the key technology to realize the green and low-carbon of rail vehicles. Traditional heavy-haul railway wagons mainly use metal materials such as steel and aluminum alloy, which are subject to material characteristics, and the vehicles face the bottleneck of weight reduction. Carbon fiber is known as the "king of new materials" because of its advantages of light weight, high strength, fatigue resistance and corrosion resistance, and is an excellent material for lightweight heavy-duty railway wagons.

This time, the successful research and development of advanced carbon fiber reinforced resin matrix composites suitable for the field of heavy-duty railway wagons has overcome key technical problems such as the integrated preparation of large parts of composite plates, and applied such new materials to the main bearing structure of heavy-haul railway wagons for the first time.

"The specific strength and specific modulus of the carbon fiber reinforced resin matrix composites we developed are 3-5 times and 1.5-1.8 times that of aluminum alloy, respectively, which can better meet the requirements of lightweight and large parts production and use of heavy-duty railway wagons, and have technical advantages such as lighter, more energy-saving, higher strength and stronger environmental adaptability." Wu Fumei, manager of the composite materials department of the advanced materials R&D center of the Beijing Institute of Low Carbon and Clean Energy of the National Energy Group, said that the weight of the new vehicle body is more than 20% lower than that of the same aluminum alloy material.

At the same time, this type of heavy-duty railway wagon also integrates new components such as high-strength heavy-duty coupler, integrated air brake device, dump bottom door opening and closing device, and realizes the integrated application of modern information technology such as Internet of Things, big data, and cloud computing in railway wagons.

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