本发明提供一种重载铁路用高强韧耐磨耐腐蚀贝氏体钢轨及其制造方法,钢轨成分按重量百分比计：C：0.15％～0.25％,Si：0.80％～1.60％,Mn：1.00％～2.20％,P：≤0.025,S：≤0.015,Cr：0.80％～1.80％,Cu：0.20％～0.50％,Mo：0.20％～0.50％,Ni：0.10％～0.40％；B：0.001％～0.003％,Nb：0.15％～0.25％,余量为Fe和不可避免杂质。本发明钢轨抗拉强度≥1450MPa,屈服强度≥1300MPa,延伸率≥13.0％,常温冲击吸收能量AKU2≥90J,断面收缩率≥52％,轨头横断面硬度不低于43HRC。

The invention provides a high strength, toughness, wear resistance and corrosion resistance bainite rail for heavy haul railway and a manufacturing method thereof. The rail composition is calculated by weight percentage: C: 0.15% ~ 0.25%, Si: 0.80% ~ 1.60%, Mn: 1.00% ~ 2.20%, P: ≤ 0.025, s: ≤ 0.015, Cr: 0.80% ~ 1.80%, Cu: 0.20% ~ 0.50%, Mo: 0.20% ~ 0.50%, Ni: 0.10% ~ 0.40%; B: 0.001% ~ 0.003%, Nb: 0.15% ~ 0.25%, the balance is Fe and inevitable impurities. The tensile strength of the rail is ≥ 1450mpa, the yield strength is ≥ 1300mpa, the elongation is ≥ 13.0%, the impact absorption energy aku2 at room temperature is ≥ 90J, the reduction of section is ≥ 52%, and the cross-sectional hardness of the rail head is not less than 43hrc.