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    • 2. 发明公开
    • METHOD AND APPARATUS FOR HEAT TREATING RAILS
    • 用于热处理轨道的方法和设备
    • EP2700724A2
    • 2014-02-26
    • EP12830673.5
    • 2012-09-05
    • Scientific Manufacturing Enterprise Tomsk Electronic Company, Ltd.
    • KHLYST, Sergey VasilievichKUZMICHENKO, Vladimir MikhaylovichSERGEEV, Sergey MikhaylovichSHESTAKOV, Andrey NikolaevichKIRICHENKO, Mikhail NikolaevichPSHENICHNIKOV, Pavel AlexandrovichIVANOV, Alexey GennadievichKOZHEVNIKOV, Kontantin GennadievichGONTAR, Alexey VladimirovichKHLYST, Ilya SergeevichKIRICHKOV, Anatoly AlexandrovichKUSHNAREV, Alexey VladislavovichGALITSYN, Georgy Alexandrovich
    • C21D9/04C21D1/42C21D11/00C21D1/18
    • C21D9/04C21D1/42C21D11/00F27B9/20F27D11/06F27D2099/0015Y02P10/253
    • The invention relates to the iron and steel industry, more specifically to methods and devices for heat treating of railway rails.
      The method for heat treating of a rail includes preheating, postheating, and cooling. The technical result is achieved by means of heating that is carried out continuously and/or intermittently according to a programmed mode. Preheating is carried out to the austenitization start temperature (point Ac 1 ) without exceeding the austenitization end temperature (point Ac 3 ). Postheating is carried out by thermal cycling in the α-γ phase transformation region. In the intervals between individual heating devices, retention is carried out to equalize the temperature over each cross-section. The cooling speed is changed at different stages of the cooling mode. The claimed method is carried out on the proposed apparatus, which comprises a preheating zone, a thermal cycling zone, a homogenization zone with individual heating devices having intervals and/or devices therebetween for equalizing the temperature over a cross-section, a cooling zone containing cooling modules with a unit for controlling and adjusting the cooling parameters, and a self-tempering zone.
      The technical result of the invention consists in improved physical and mechanical properties, a rail head contact surface hardness of up to 415 HB, and increased service life of the rail. The rail is of the required straightness after heat treatment, making it possible to exclude straightening in a roller straightening machine. The range of adjustment of the heating and cooling speeds is extended, making it possible to heat treat rails made from different grades of steel.
    • 本发明涉及钢铁工业,更具体地涉及铁路轨道热处理的方法和装置。 铁轨的热处理方法包括预热,后加热和冷却。 技术结果是通过根据编程模式连续和/或间歇地进行加热来实现的。 在不超过奥氏体化最终温度(点Ac3)的情况下进行奥氏体化开始温度(点Ac1)的预热。 后加热通过在α-γ相变区中的热循环来进行。 在各个加热装置之间的间隔中,进行保持以均衡每个横截面上的温度。 冷却速度在冷却模式的不同阶段发生变化。 要求保护的方法在所提出的设备上进行,所述设备包括预热区,热循环区,具有各自的加热装置的均化区,所述加热装置之间具有用于使横截面上的温度均衡的间隔和/或装置,冷却区 具有用于控制和调整冷却参数的单元的冷却模块以及自动回火区域。 本发明的技术结果在于提高了物理和机械性能,钢轨头部接触表面硬度高达415HB,并且提高了钢轨的使用寿命。 热处理后钢轨具有所需的平直度,可以排除辊式矫直机中的矫直。 加热和冷却速度的调整范围被延长,使得可以对由不同等级的钢制成的导轨进行热处理。