公开(公告)号：US20130193223A1

公开(公告)日：2013-08-01

申请号：US13820493

申请日：2011-09-02

申请人： Dongsheng Mei ,  Ming Zou ,  Zhenyu Han ,  Quan Xu ,  Hua Guo ,  Yong Deng ,  Dadong Li ,  Li Tang ,  Yun Zhao ,  Jianhua Liu

发明人： Dongsheng Mei ,  Ming Zou ,  Zhenyu Han ,  Quan Xu ,  Hua Guo ,  Yong Deng ,  Dadong Li ,  Li Tang ,  Yun Zhao ,  Jianhua Liu

IPC分类号： E01B5/02

CPC分类号： E01B5/02 ,  C21D9/04 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/28 ,  Y10T29/49991

摘要： The present discloses a steel rail for high speed and quasi-high speed railways and a manufacturing method thereof. The steel rail having a superior rolling contact fatigue property can be obtained by reducing content of carbon in conjunction with controlled cooling after rolling. The steel rail includes 0.40-0.64% by weight of C, 0.10-1.00% by weight of Si, 0.30-1.50% by weight of Mn, less than or equal to 0.025% by weight of P, less than or equal to 0.025% by weight of S, less than or equal to 0.005% by weight of Al, more than 0 and less than or equal to 0.05% by weight of a rare earth element, more than 0 and less than or equal to 0.20% by weight of at least one of V, Cr, and Ti, and a remainder of Fe and inevitable impurities. The steel rail manufactured according to the method of the present invention maintains the strength and hardness of the existing steel rail for the high speed railways, while enhancing the toughness, plasticity and yield strength, and an energy value required for initiating and expanding microcracks formed at the surface of the steel rail due to fatigue is increased, and thus under the same conditions, the rolling contact fatigue property of the steel rail can be improved, thereby finally improving the service lifetime and the transportation safety of the steel rail.

摘要翻译： 本发明公开了一种用于高速和准高速铁路的钢轨及其制造方法。 具有优异的滚动疲劳性能的钢轨可以通过在轧制后与可控制的冷却相结合地减少碳含量来获得。 钢轨包含0.40-0.64重量％的C，0.10-1.00重量％的Si，0.30-1.50重量％的Mn，小于或等于0.025重量％的P，小于或等于0.025重量％ 的S，小于或等于0.005重量％的Al，大于0和小于或等于0.05重量％的稀土元素，大于0重量％且小于等于0.20重量％ V，Cr和Ti中的至少一种，剩余的Fe和不可避免的杂质。 根据本发明的方法制造的钢轨在提高韧性，塑性和屈服强度的同时保持现有的高速铁路钢轨的强度和硬度，以及形成的微裂纹所需的能量值 钢轨的疲劳表面增加，因此在相同条件下，能够提高钢轨的滚动疲劳特性，从而最终提高钢轨的使用寿命和运输安全性。