FIELD: metallurgy.
SUBSTANCE: steel has chemical composition comprising, in wt %: C 0.71-0.82, Si 0.25-0.45, Mn 0.75-1.05, V 0.03-0.15, P≤0.030, S≤0.035, Al≤0.040, Fe and unavoidable impurities - the rest. The interlattice distance of perlite is 0.05-0.09 mcm, and the fracture work at normal temperature is 30-35 J.
EFFECT: rails have high strength and toughness, as well as high fatigue strength during rolling and wear resistance during use.
11 cl, 1 dwg, 4 tbl, 5 ex
