高速重载铁路对路轨提出更加严格的要求，而我国现使用的钢轨抗拉强度最高为１１００ＭＰａ，已不能完全满足实际需要，开发研制新一代钢轨迫在眉睫。我国使用的钢轨一般为珠光体钢轨，其机械性能开发将近极限，尽快开发贝氏体钢轨将填补这方面的空白。１国内外贝氏体钢研... High-speed heavy haul railways put forward more stringent requirements on the rail. However, the maximum tensile strength of rail currently used in our country is 1100MPa, which can not fully meet the actual needs. It is imminent to develop a new generation of rails. The rails used in our country are generally pearlite rails, the development of mechanical properties near the limit, the development of bainitic rails as soon as possible to fill this gap. 1 bainite steel at home and abroad