What types of welding are used for rails?

18-07-2019

Principally two types of welding are used for rails. One is Flash Butt Welding, and the other is Alumino-Thermic Welding, also known as Thermit(e) welding. A third kind of welding, known as Gas Pressure welding, is used much less often, and a fourth kind, Metal Arc Welding, is very rarely used. In Flash Butt Welding, a strong electric current is passed through the metal body of the rail in the vicinity of the spot which is to be welded, and the resistance of the rail to the current results in localized heating which melts the metal. No additional material is added, and the parent metal of the rails itself forms the material of the weld. About 25mm to 35mm of the rail length is consumed in

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