| 摘要 |
PURPOSE:To obtain a wear-resistant high-efficiency rail having instable fracture propagation stopping capacity by specifying steel components and by forming the web out of high-toughness tempered bainite structure and also forming the head out of high-strength fine pearlite structure. CONSTITUTION:The rail has a composition consisting of, by weight, 0.5-0.85% C, 0.1-1% Si, 0.5-1.5% Mn, <0.035% P, <0.035% S, <0.05% Al, and the balance Fe with inevitable impurities, in which the web is composed of high- toughness tempered bainite structure and the head is composed of high-strength fine pearlite structure. Or further, 1 or >=2 kinds among 0.05-1.5% Cr, 0.05-0.2% Mo, 0.03-0.1% V, 0.1-1% Ni and 0.005-0.05% Nb are added to the above composition and the balance consists of Fe with inevitable impurities.
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