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    • 4. 发明专利
    • Method of manufacturing rail
    • 制造铁路的方法
    • JP2014101583A
    • 2014-06-05
    • JP2014029930
    • 2014-02-19
    • Nippon Steel & Sumitomo Metal新日鐵住金株式会社
    • UEDA MASAHARUMIYAZAKI TERUHISA
    • C21D8/00C21D9/04C22C38/00C22C38/58
    • C22C38/24C21D9/04C21D2211/009C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/08C22C38/10C22C38/12C22C38/14C22C38/16C22C38/18C22C38/26E01B5/02
    • PROBLEM TO BE SOLVED: To provide a rail having improved internal fatigue damage resistance which is required for a rail of a freight railway.SOLUTION: The method of manufacturing a rail is characterized by setting a final rolling temperature at an outline surface of the rail head part at over 1000°C and 1100°C or less, and a ratio of a final rolling reduction area defined in a percentage of the reduction area to a steel cross area before initiation of hot rolling at 1.0 to 3.9% in a hot rolling when manufactured by re-heating a bloom having a prescribed chemical composition and acceleratively cooling immediately after preparing the rail by conducting hot rolling. The method of manufacturing a rail is characterized by setting the re-heating temperature at over 1000°C and 1150°C or less and a retention time at 5 to 10 minutes in re-heating of the rail when manufactured by re-heating the bloom and acceleratively cooling immediately after preparing the rail by conducting hot rolling.
    • 要解决的问题:提供一种具有改善的货运铁路轨道所需的内部疲劳损伤抗力的轨道。解决方案:制造轨道的方法的特征在于在轨头的轮廓表面设定最终轧制温度 超过1000℃和1100℃以下的部分,以及在热轧中以1.0〜3.9%的热轧开始时的还原面积与钢交叉面积的比例定义的最终轧制面积的比例, 通过重新加热具有规定化学成分的花纹并通过热轧制备轨道后立即加速冷却而制造。 轨道的制造方法的特征在于,当通过重新加热花纹制造时,将再加热温度设定在1000℃以上1150℃以下,并且在轨道再加热时的停留时间为5〜10分钟 并且通过进行热轧在制备轨道之后立即加速冷却。