RAIL STEEL WITH AN EXCELLENT COMBINATION OF WEAR PROPERTIES AND ROLLING CONTACT FATIGUE RESISTANCE

摘要

THE INVENTION RELATES TO A HIGH-STRENGTH PEARLITIC STEEL RAIL WITH AN EXCELLENT COMBINATION OF WEAR PROPERTIES AND ROLLING CONTACT FATIGUE RESISTANCE WHEREIN THE STEEL CONSISTS OF 0.88% TO 0.95% CARBON, 0.75% TO 0.92% SILICON, 0.80% TO 0.95% MANGANESE, 0.05% TO 0.14% VANADIUM, UP TO 0.008% NITROGEN, UP TO 0.030% PHOSPHORUS, 0.008 TO 0.030% SULPHUR, AT MOST 2.5 PPM HYDROGEN, AT MOST 0.10% CHROMIUM, AT MOST 0.010% ALUMINIUM, AT MOST 20 PPM OXYGEN, THE REMAINDER BEING IRON AND UNAVOIDABLE IMPURITIES. THE MOST SUITABLE DRAWING IS FIGURE 1.