A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-ductility and alpine-cold railway steel rail and production method thereof
The invention belongs to the technical field of anti-fatigue steel rails, and particularly relates to a high-ductility and alpine-cold railway steel rail and a production method thereof. Aiming at theneeds of steel rails in severe geographical environments such as plateaus, the invention provides a high-ductility and alpine-cold railway steel rail with higher ductility and higher contact fatiguedamage resistance. The high-ductility and alpine-cold railway steel rail comprises the following chemical components in percentage by weight: 0.40%-0.65% of C, 0.10%-0.60% of Si, 0.5%-1.10% of Mn, 0.1%-0.3% of Cr, not greater than 0.020% of P, not greater than 0.020% of S, 0.004%-0.006% of V and the balance Fe and inevitable impurities. The invention further provides a production method for the steel rail; a foaming agent is used in the ladle furnace (LF) heating process, and pouring is performed under protection in the whole process; the steel rail according to the invention has good rollingcontact fatigue performance and abrasion resistance, and the shock load that the steel rail needs to bear and the capacity of resisting low-temperature shock crack propagation under the low-temperature environment of an alpine-cold and high-altitude region; and the steel rail is especially suitable for being laid on a Sichuan-Tibet highway freezing and thawing cycle lines.
本发明属于耐疲劳钢轨技术领域，具体涉及一种高韧高寒铁路钢轨及其生产方法。针对类似高原等恶劣的地理环境钢轨的需求，本发明提供了一种韧性更高、同时抗接触疲劳伤损能力更强的高韧高寒铁路钢轨，化学成分包括：按重量百分比计，C：0.40～0.65％，Si：0.10～0.60，Mn：0.5～1.10％，Cr：0.1～0.3％，P≤0.020％，S≤0.020％，V：0.004～0.006％，余量为铁和不可避免的杂质。本发明还提供了一种上述钢轨的生产方法，LF加热过程中使用发泡剂，全程保护浇注，本发明的钢轨滚动接触疲劳性能和耐磨损性能良好，提高了高寒高海拔区域低温环境下，钢轨需要承受的冲击载荷和抵抗低温冲击裂纹扩展的能力，特别适宜铺设在川藏线冻融循环线。
High-ductility and alpine-cold railway steel rail and production method thereof
The invention belongs to the technical field of anti-fatigue steel rails, and particularly relates to a high-ductility and alpine-cold railway steel rail and a production method thereof. Aiming at theneeds of steel rails in severe geographical environments such as plateaus, the invention provides a high-ductility and alpine-cold railway steel rail with higher ductility and higher contact fatiguedamage resistance. The high-ductility and alpine-cold railway steel rail comprises the following chemical components in percentage by weight: 0.40%-0.65% of C, 0.10%-0.60% of Si, 0.5%-1.10% of Mn, 0.1%-0.3% of Cr, not greater than 0.020% of P, not greater than 0.020% of S, 0.004%-0.006% of V and the balance Fe and inevitable impurities. The invention further provides a production method for the steel rail; a foaming agent is used in the ladle furnace (LF) heating process, and pouring is performed under protection in the whole process; the steel rail according to the invention has good rollingcontact fatigue performance and abrasion resistance, and the shock load that the steel rail needs to bear and the capacity of resisting low-temperature shock crack propagation under the low-temperature environment of an alpine-cold and high-altitude region; and the steel rail is especially suitable for being laid on a Sichuan-Tibet highway freezing and thawing cycle lines.
本发明属于耐疲劳钢轨技术领域，具体涉及一种高韧高寒铁路钢轨及其生产方法。针对类似高原等恶劣的地理环境钢轨的需求，本发明提供了一种韧性更高、同时抗接触疲劳伤损能力更强的高韧高寒铁路钢轨，化学成分包括：按重量百分比计，C：0.40～0.65％，Si：0.10～0.60，Mn：0.5～1.10％，Cr：0.1～0.3％，P≤0.020％，S≤0.020％，V：0.004～0.006％，余量为铁和不可避免的杂质。本发明还提供了一种上述钢轨的生产方法，LF加热过程中使用发泡剂，全程保护浇注，本发明的钢轨滚动接触疲劳性能和耐磨损性能良好，提高了高寒高海拔区域低温环境下，钢轨需要承受的冲击载荷和抵抗低温冲击裂纹扩展的能力，特别适宜铺设在川藏线冻融循环线。
High-ductility and alpine-cold railway steel rail and production method thereof
高韧高寒铁路钢轨及其生产方法
YUAN JUN (author) / ZOU MING (author) / DENG YONG (author) / YANG DAWEI (author)
2021-01-19
Patent
Electronic Resource
Chinese
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