RAIL STEEL Russian patent published in 2005 - IPC

FIELD: ferrous metallurgy; production of rail steel.

SUBSTANCE: the invention is pertaining to the field of ferrous metallurgy, in particular, to production of steel for manufacture of railway rails. The offered rail steel contains its components in the following ratio (in mass %): carbon - 0.32-0.45; silicon - 0.95-1.20; manganese - 1.25-1.5; chromium - 0.8-1.0; vanadium - 0.09-0.15; aluminum - no more than 0.005; nitrogen - 0.012-0.02; calcium - 0.0005-0.049; molybdenum - 0.2-0.5; niobium - 0.003-0.02; nickel - 0.05-0.3; iron - the rest. At that in capacity of the impurities the steel may contain (in mass %): sulfur - no more than 0,015; phosphorus no more than 0,02; copper no more than 0.2. The technical result of the invention is an increased complex of the rail steel mechanical properties and firmness of the rails, and also increased their operational durability.

EFFECT: the invention ensures an increased complex of the rail steel mechanical properties and firmness of the rails as well as an increase of their operational durability.

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