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A platform for research: civil engineering, architecture and urbanism
Steel rail for subways and preparation method of steel rail
The invention relates to the field of steel rail materials, in particular to a steel rail for subways and a preparation method of the steel rail. According to the steel rail for the subways, on the basis of the total weight of a steel billet of the steel rail for the subways, the steel billet is prepared from 0.65%-0.75% of C, 0.20%-0.50% of Si, 0.80%-1.00% of Mn, 0.04%-0.10% of V and the balanceFe and inevitable impurities. The preparation method includes the following steps that the steel billet after heat insulation treatment is rolled, a waste-heat steel rail is obtained, quick cooling heat treatment is performed at the rail head part, heat treatment is divided into two sections, in the first section, the open cooling temperature is higher than 800 DEG C, the cooling rate is controlled to range from 4 DEG C/s to 5 DEG C/s for cooling, and in the second section, when the steel rail is cooled to the temperature ranging from 550 DEG C to 600 DEG C, the cooling rate is controlled to range from 1.5 DEG C/s to 2.5 DEG C/s for continuous cooling; and accelerated cooling is stopped when the temperature is reduced to be in the range of 440-460 DEG C, and then the steel rail is air-cooled to the room temperature. The steel rail has the excellent contact fatigue damage resistance.
本发明涉及钢轨材料领域，具体涉及一种地铁用钢轨及其制备方法。本发明地铁用钢轨，以所述地铁用钢轨的钢坯的总重量为基准，钢坯含有0.65～0.75％C，0.20～0.50％Si，0.80～1.00％Mn，0.04～0.10％V，余量为Fe及不可避免的杂质；制备方法包括以下步骤：将保温处理后的钢坯进行轧制得到余热钢轨，对轨头部位开展加速冷却热处理，热处理分为两段：第一段，开冷温度大于800℃，控制冷速为4～5℃/s进行冷却；第二段，钢轨冷却到550～600℃时，控制冷速为1.5～2.5℃/s继续冷却；当温度降至440～460℃时停止加速冷却，然后空冷至室温。本发明钢轨具有优良的抗接触疲劳伤损性能。
Steel rail for subways and preparation method of steel rail
The invention relates to the field of steel rail materials, in particular to a steel rail for subways and a preparation method of the steel rail. According to the steel rail for the subways, on the basis of the total weight of a steel billet of the steel rail for the subways, the steel billet is prepared from 0.65%-0.75% of C, 0.20%-0.50% of Si, 0.80%-1.00% of Mn, 0.04%-0.10% of V and the balanceFe and inevitable impurities. The preparation method includes the following steps that the steel billet after heat insulation treatment is rolled, a waste-heat steel rail is obtained, quick cooling heat treatment is performed at the rail head part, heat treatment is divided into two sections, in the first section, the open cooling temperature is higher than 800 DEG C, the cooling rate is controlled to range from 4 DEG C/s to 5 DEG C/s for cooling, and in the second section, when the steel rail is cooled to the temperature ranging from 550 DEG C to 600 DEG C, the cooling rate is controlled to range from 1.5 DEG C/s to 2.5 DEG C/s for continuous cooling; and accelerated cooling is stopped when the temperature is reduced to be in the range of 440-460 DEG C, and then the steel rail is air-cooled to the room temperature. The steel rail has the excellent contact fatigue damage resistance.
本发明涉及钢轨材料领域，具体涉及一种地铁用钢轨及其制备方法。本发明地铁用钢轨，以所述地铁用钢轨的钢坯的总重量为基准，钢坯含有0.65～0.75％C，0.20～0.50％Si，0.80～1.00％Mn，0.04～0.10％V，余量为Fe及不可避免的杂质；制备方法包括以下步骤：将保温处理后的钢坯进行轧制得到余热钢轨，对轨头部位开展加速冷却热处理，热处理分为两段：第一段，开冷温度大于800℃，控制冷速为4～5℃/s进行冷却；第二段，钢轨冷却到550～600℃时，控制冷速为1.5～2.5℃/s继续冷却；当温度降至440～460℃时停止加速冷却，然后空冷至室温。本发明钢轨具有优良的抗接触疲劳伤损性能。
Steel rail for subways and preparation method of steel rail
地铁用钢轨及其制备方法
WANG YUAN (author) / YUAN JUN (author) / LI RUOXI (author) / YANG DAWEI (author)
2020-08-04
Patent
Electronic Resource
Chinese
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