Railway frog milestone: my country's first set of pure steel frogs officially rolled off the production line, with lifespan increased by 1.7 times

According to news from this site on August 2, China's pure steel frog production line invested and built by China Railway Shanqiao, a subsidiary of China Railway Industry, officially produced China's first set of pure steel frogs on July 31, marking that China's railway frogs have entered a new era. milestone.

1. Frogs are the most critical components of railway switches, and their condition and life span directly affect the normal operation of the line.
For a long time, the production equipment and technical processes of domestic enterprises in smelting, casting, heat treatment and other processes have been relatively backward, resulting in unstable performance and status of frogs.

▲ Refining pure molten steel. Compared with ordinary high manganese steel frogs, pure steel frogs have a more stable and finer organizational structure and excellent physical and chemical properties. The material’s tensile strength, hardness and impact Performance indicators such as toughness are significantly improved, while defects in steel can also be reduced and service life extended. Experiments show that the wear and impact resistance of pure steel frogs is greatly enhanced, and the transportation capacity and service life are increased by 1.7 times compared with ordinary high manganese steel frogs.

▲ Casting pure steel frogs. This site noticed that China Railway Shanqiao also invested in the construction of the largest automatic molding production line for railway frogs in China, realizing centralized control, intelligent scheduling and remote monitoring of the entire casting and heat treatment process. . The overall production efficiency is increased by 15%, energy consumption is reduced by 7%, and the annual production capacity reaches 15,000 sets, an increase of 20% compared with before production.

▲ Pure steel frog heat treatment

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