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Production method for improving impact toughness of rail web of heat-treated steel rail
The invention provides a production method for improving impact toughness of a rail web of a heat-treated steel rail, and the steel rail comprises the following chemical components in percentage by weight on the basis of the total weight of the steel rail: 0.75-0.88% of C, 0.60-0.80% of Si, 0.90-1.30% of Mn, 0.20-0.55% of Ni, 0.10-0.20% of V, 0.03-0.06% of Nb, less than or equal to 0.025% of P, less than or equal to 0.025% of S and the balance of Fe and inevitable impurities. Through reasonable arrangement of chemical components and a post-rolling heat treatment process, the rail head, the rail web and the rail bottom of the rolled steel rail are subjected to accelerated cooling at different cooling speeds, and good matching of the strength of the rail head and the impact toughness of the rail web of the steel rail is achieved, so that the comprehensive use performance of the steel rail is improved, the service life of the steel rail is prolonged, and the railway development requirement is met.
本发明提供一种提高热处理钢轨轨腰冲击韧性的生产方法，以钢轨的总重量为基准，所述钢轨的化学成分按重量百分比计包括：C 0.75‑0.88％、Si 0.60‑0.80％、Mn 0.90‑1.30％、Ni 0.20‑0.55％、V 0.10‑0.20％、Nb 0.03‑0.06％、P≤0.025％、S≤0.025％，其余为Fe和不可避免的杂质。本发明通过合理设置化学成分以及轧后热处理工艺，对轧后钢轨轨头、轨腰和轨底进行不同冷速的加速冷却，实现钢轨轨头强度和轨腰冲击韧性的良好匹配，从而提高钢轨的综合使用性能和使用寿命，满足铁路发展需求。
Production method for improving impact toughness of rail web of heat-treated steel rail
The invention provides a production method for improving impact toughness of a rail web of a heat-treated steel rail, and the steel rail comprises the following chemical components in percentage by weight on the basis of the total weight of the steel rail: 0.75-0.88% of C, 0.60-0.80% of Si, 0.90-1.30% of Mn, 0.20-0.55% of Ni, 0.10-0.20% of V, 0.03-0.06% of Nb, less than or equal to 0.025% of P, less than or equal to 0.025% of S and the balance of Fe and inevitable impurities. Through reasonable arrangement of chemical components and a post-rolling heat treatment process, the rail head, the rail web and the rail bottom of the rolled steel rail are subjected to accelerated cooling at different cooling speeds, and good matching of the strength of the rail head and the impact toughness of the rail web of the steel rail is achieved, so that the comprehensive use performance of the steel rail is improved, the service life of the steel rail is prolonged, and the railway development requirement is met.
本发明提供一种提高热处理钢轨轨腰冲击韧性的生产方法，以钢轨的总重量为基准，所述钢轨的化学成分按重量百分比计包括：C 0.75‑0.88％、Si 0.60‑0.80％、Mn 0.90‑1.30％、Ni 0.20‑0.55％、V 0.10‑0.20％、Nb 0.03‑0.06％、P≤0.025％、S≤0.025％，其余为Fe和不可避免的杂质。本发明通过合理设置化学成分以及轧后热处理工艺，对轧后钢轨轨头、轨腰和轨底进行不同冷速的加速冷却，实现钢轨轨头强度和轨腰冲击韧性的良好匹配，从而提高钢轨的综合使用性能和使用寿命，满足铁路发展需求。
Production method for improving impact toughness of rail web of heat-treated steel rail
一种提高热处理钢轨轨腰冲击韧性的生产方法
SU SHANGFEI (author) / ZHOU JIANHUA (author) / LIU FANGMING (author)
2024-09-06
Patent
Electronic Resource
Chinese
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