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STEEL RAIL FOR HIGH SPEED AND QUASI-HIGH SPEED RAILWAYS AND METHOD OF MANUFACTURING THE SAME 发明申请

2023-11-02 3420 1282K 0

专利信息

申请日期 2025-07-15 申请号 US13820493
公开(公告)号 US20130193223A1 公开(公告)日 2013-08-01
公开国别 US 申请人省市代码 全国
申请人 Dongsheng Mei; Ming Zou; Zhenyu Han; Quan Xu; Hua Guo; Yong Deng; Dadong Li; Li Tang; Yun Zhao; Jianhua Liu
简介 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.


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