RAIL AND METHOD FOR MANUFACTURING SAME
    1.
    发明公开

    公开(公告)号:EP4282991A1

    公开(公告)日:2023-11-29

    申请号:EP22779522.6

    申请日:2022-02-04

    摘要: An object is to provide a method for manufacturing a high-hardness and high-quality rail through a simple cooling process even in the presence of temperature variations in the longitudinal direction of the rail before the start of cooling.
    A rail manufacturing method includes a step of accelerated cooling a rail having a temperature equal to or higher than an austenite region temperature. In the rail manufacturing method, austenite represents a portion of a region from a cooled surface of a rail head to a depth of 5 mm at the end of accelerated cooling, and the temperature of a rail head surface at the completion of heat recuperation after the end of accelerated cooling is in a pearlite transformation temperature range.

    HEAT TREATMENT RAIL MANUFACTURING METHOD AND MANUFACTURING APPARATUS
    10.
    发明公开
    HEAT TREATMENT RAIL MANUFACTURING METHOD AND MANUFACTURING APPARATUS 有权
    热处理钢轨制造方法和制造设备

    公开(公告)号:EP3184654A1

    公开(公告)日:2017-06-28

    申请号:EP15833397.1

    申请日:2015-08-19

    摘要: There is provided a manufacturing method and a manufacturing apparatus for a head hardened rail to which various alloy elements are added and which is excellent in hardness and toughness of a head portion surface layer. The method includes, when forcibly cooling at least a head portion of a hot-rolled rail (1) or a heated rail (1), starting the forcible cooling from a state where a surface temperature of the head portion (1a) of the rail (1) is not less than an austenite range temperature, and performing the forcible cooling at a cooling rate of 10°C/sec or more until the surface temperature reaches 500°C or more and 700°C or less after the forcible cooling is started.

    摘要翻译: 本发明提供一种头部硬化轨道的制造方法及制造装置,该头部硬化轨道添加有各种合金元素,头部表层的硬度及韧性优异。 该方法包括:在强制冷却热轧钢轨(1)或加热轨道(1)的至少一个头部时,开始强制冷却,从钢轨头部(1a)的表面温度 (1)为奥氏体范围温度以上,强制冷却后,以10℃/秒以上的冷却速度进行强制冷却至表面温度达到500℃以上且700℃以下为止 开始。