| 摘要 |
The disclosed steel rail contains, by mass percent, 0.85-1.20 % carbon, 0.05-2.00 % silicon, 0.05-0.50 % manganese, 0.05-0.60 % chromium and = 0.0150 % phosphorus, with the remainder consisting of iron and inevitable impurities. At least 97% of the head surface, which has a depth of 10 mm using the surface of the head recess or the top of the head as a starting point, has a pearlite structure. The pearlite structure has a Vickers hardness of 320-500 Hv. Within the pearlite structure, the density of manganiferous cementite (CMn [at.%]) divided by the density of manganiferous ferrite (FMn [at.%]) gives a CMn/FMn value of 1.0-5.0. |
