Development of Taijin Rail Steel

Rail Steel Development

In recent decades, rail steel has developed rapidly for the railway industry. Compared with traditional rail steels such as ordinary steels and alloy steels, rail steels have the characteristics of higher strength, higher fatigue resistance and better resistance to wear and oxidation. Due to the rapid development of rail steel technology, the performance of rail steel has improved, and the fatigue life and running performance of rail have been significantly improved.

At present, the development of rail steel mainly mainly focuses on the improvement of chemical composition, heat treatment process, hot extrusion and steel plate. In chemical composition, the carbon content is controlled at low level and alloying element is appropriately added. Low carbon content can improve the fatigue performance while appropriate addition of alloying elements, such as chromium, vanadium, nickel and so on, can improve the hardenability of rail steel, so that reasonable and uniform hardness can be achieved. In addition, the addition of appropriate alloying elements can also reduce the carbide segregation significantly and improve the corrosion resistance of rail. In heat treatment process, all kinds of high-temperature surface quenching technologies have been developed, such as neutral step cooling, two-step cooling, combined cooling, surface quenching + cryogenic treatment, etc., so that the rail can obtain higher strength, higher resistance, strength and service life. Hot extrusion technology is a kind of plastic processing technology for fabricated railway parts, which are subjected to radial pressure on the part surface to produce part with different profiles, so that the rail has the advantages of uniform cross section, improved fatigue performance, better creep performance and longer service life. Steel plate is a kind of high-strength steel plate which is used in the production of inner and outer surface of the railway track, and after quenching and tempering, the steel plate can obtain higher strength, higher fatigue limit and longer life.

At present, the development of rail steel has progressed, and many new technologies have been applied in the manufacturing of railway. With the improvement of steel rolling technology and the expansion of steel production technology, the development of rail steel is becoming more and more mature. In addition, with the development of the railway industry, higher requirements will be put forward for the performance of rail steel in the future, and the development of rail steel will be further promoted.

In summary, the development of rail steel has played an important role in promoting the development of the railway industry. With the continuous development of technology and the application of new technologies, the performance of rail steel will be further improved, which will bring more benefits to the railway industry.

Steel rail is the most important part of the railway track. It plays a decisive role in the safe operation of the train. In recent years, Chinas railway industry has developed rapidly, and the development of steel rail has also made great progress.

Steel rail is a kind of material used in the track of railway. It is wear-resistant and has strong hardness. It is mainly used in the railway and subway engineering. The development of Chinas railway industry has kept up with the development of the world advanced railway industry, and its production and performance have reached the world advanced level.

At present, my countrys steel rails mainly use low-alloy high-strength steel and high-strength low-alloy steel. High-speed railway adopts high-strength low-alloy steel. The performance of high-strength low-alloy steel is superior to that of ordinary carbon steel in terms of yield ratio, tensile strength, fatigue strength and plasticity.

At the same time, the production of Chinas steel rail also continues to increase, and the size of the product continues to increase. The size of large-scale steel rail has increased from the initial 48 kg/m to todays 60 kg/m and 70 kg/m. The development of steel rail technology has not only improved the durability, hardness and wear resistance of steel rails, but also improved their sizes, weights, materials and production processes.

In addition, China is also speeding up the transformation from manual to automated production. Advanced automatic ultrasonic flaw detection, automatic track measuring device and powerful force measurement system have been put into production. It will further enhance the accuracy of steel rail production and reduce product cost.

In conclusion, with the continuous development of Chinas railway industry, the production and performance of steel rail have reached the world advanced level. With the help of advanced automated production and testing technology, the product quality will be further improved, and the cost of steel rail will also be reduced.