Patent ID: 8361382
Filing Date: 2013-01-29
Classification: C21D,C22C

Abstract:
1. A high-strength pearlitic steel rail having a composition consisting of, in mass percent, 0.6% to 1.0% of C, 0.1% to 1.5% of Si, 0.4% to 2.0% of Mn, 0.035% or less of P, 0.0100% or less of S, 0.0010% to 0.010% of Ca, 0.004% or less of O, and the remainder being Fe and inevitable impurities, wherein the tensile strength is 1200 MPa or more, and the size of a long side of a C type inclusion is 50 μm or less in at least a cross-section in a longitudinal direction of a rail head, and the number of C type inclusions, each having a size of a long side of 1 μm to 50 μm, is 0.2 to 10 per observed area of 1 mm