Wear resistance, rolling contact fatigue resistance and weldability of excellent combination rail steel having

摘要

A steel having a hardness of at least 330 HV30, a tensile strength of at least 1000 MPa and a yield strength of at least 600 MPa, in particular steel steel for the production of groove rails, (by weight percent) 0.70% to 0.85% carbon, 0.65% to 1.00% silicon, 1.1% to 1.4% manganese, 0.07% to 0.15% vanadium, up to 0.008% nitrogen, 0 Up to 0.025% phosphorus, 0.008% to 0.030% sulfur, up to 2.5 ppm hydrogen, up to 0.10% chromium, up to 0.010% aluminum, up to 20 ppm Steel steel comprising the remainder consisting of oxygen, iron and inevitable impurities.