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Pearlite steel rail with rail head hardening layer having a uniform hardness gradient, and preparation method thereof
The invention relates to the field of steel rail production, and discloses a pearlite steel rail with a rail head hardening layer having a uniform hardness gradient, and a preparation method thereof.The method comprises the steps of converter or electric furnace smelting, LF refining, RH or VD vacuum treatment and continuous casting which are conducted in sequence to obtain a steel billet, and rolling, heat treatment and machining of the steel billet; the heat treatment is a multi-stage cooling process, and the chemical components of the steel rail are controlled; and the steel rail containsat least one of 0.65%-0.85% of C, 0.1%-1% of Si, 0.1%-1.5% of Mn, no more than 0.03% of P, no more than 0.03% of S, 0.01%-0.2% of Cr, 0.005%-0.15% of Ni, 0.001%-0.3% of Mo and 0.002%-0.2% of V, and the balance Fe and inevitable impurities. The rail head part of the steel rail manufactured by the method is provided with a deep hardening layer which is more than 25mm, and has a uniform hardness gradient.
本发明涉及钢轨生产领域，公开了一种轨头硬化层具有均匀硬度梯度的珠光体钢轨及其制备方法。该方法包括依次进行的转炉或电炉冶炼、LF炉精炼、RH或VD真空处理、连铸获得钢坯、对钢坯进行轧制、热处理和加工，所述热处理为多阶段冷却工艺，并且控制钢轨化学成分，所述钢轨含有:0.65～0.85％的C，0.1～1％的Si，0.1～1.5％的Mn，≤0.03％的P，≤0.03％的S，0.01～0.2％的Cr，0.005～0.15％的Ni、0.001～0.3％的Mo和0.002～0.2％的V中的至少一种，余量为Fe和不可避免的杂质。该方法制得的钢轨其轨头部位具有超过25mm的深硬化层，且具有均匀的硬度梯度。
Pearlite steel rail with rail head hardening layer having a uniform hardness gradient, and preparation method thereof
The invention relates to the field of steel rail production, and discloses a pearlite steel rail with a rail head hardening layer having a uniform hardness gradient, and a preparation method thereof.The method comprises the steps of converter or electric furnace smelting, LF refining, RH or VD vacuum treatment and continuous casting which are conducted in sequence to obtain a steel billet, and rolling, heat treatment and machining of the steel billet; the heat treatment is a multi-stage cooling process, and the chemical components of the steel rail are controlled; and the steel rail containsat least one of 0.65%-0.85% of C, 0.1%-1% of Si, 0.1%-1.5% of Mn, no more than 0.03% of P, no more than 0.03% of S, 0.01%-0.2% of Cr, 0.005%-0.15% of Ni, 0.001%-0.3% of Mo and 0.002%-0.2% of V, and the balance Fe and inevitable impurities. The rail head part of the steel rail manufactured by the method is provided with a deep hardening layer which is more than 25mm, and has a uniform hardness gradient.
本发明涉及钢轨生产领域，公开了一种轨头硬化层具有均匀硬度梯度的珠光体钢轨及其制备方法。该方法包括依次进行的转炉或电炉冶炼、LF炉精炼、RH或VD真空处理、连铸获得钢坯、对钢坯进行轧制、热处理和加工，所述热处理为多阶段冷却工艺，并且控制钢轨化学成分，所述钢轨含有:0.65～0.85％的C，0.1～1％的Si，0.1～1.5％的Mn，≤0.03％的P，≤0.03％的S，0.01～0.2％的Cr，0.005～0.15％的Ni、0.001～0.3％的Mo和0.002～0.2％的V中的至少一种，余量为Fe和不可避免的杂质。该方法制得的钢轨其轨头部位具有超过25mm的深硬化层，且具有均匀的硬度梯度。
Pearlite steel rail with rail head hardening layer having a uniform hardness gradient, and preparation method thereof
轨头硬化层具有均匀硬度梯度的珠光体钢轨及其制备方法
LI RUOXI (author) / DENG YONG (author) / YUAN JUN (author) / YANG DAWEI (author)
2021-02-26
Patent
Electronic Resource
Chinese
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