| 摘要 |
FIELD: metallurgy.SUBSTANCE: rail is made from steel containing the following, wt %: 0.65 - 1.20 C, 0.05 - 2.00 Si, 0.05 to 2.00 Mn, and Fe and inevitable impurities are the rest. At least some part of the head part and at least some part of bottom part of the rail have pearlite structure, and hardness of surface of the part of pearlite structure is in the range of HV 320 to HV 500, and maximum roughness of the surface of the part of pearlite structure is less than or equal to 180 mcm.EFFECT: rail has improved resistance to fatigue failure of the head and bottom parts.15 cl, 10 dwg, 3 tbl, 1 ex |
