FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy, specifically to a rail made of low-alloy steel. Rail made from low-alloy steel, wherein steel structure in head contains 5–15 % by volume of ferrite and multiphase bainite, consisting of upper and lower bainite. In method of making a rail from low-alloy steel from a hot-rolled profile rail head in hot-rolled profile directly after coming out of rolling mill stand is subjected to controlled cooling. First step comprises accelerated cooling from temperature 740–850 °C until achieving a first temperature providing ferrite conversion. Second step comprises holding at first temperature. Third step comprises further cooling to a second temperature to allow formation of multiphase bainite. Fourth step comprises holding at second temperature.
EFFECT: rail is characterised by high wear resistance, weldability; constant properties are provided throughout length of rail.
28 cl, 3 dwg, 2 ex
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