Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-yield-ratio high-strength bainite steel rail and production method thereof
The invention discloses a low-yield-ratio high-strength bainite steel rail and a production method thereof. The method is characterized in that a steel billet is smelted by adopting a steel smelting process containing 0.1-0.15 wt% of carbon; the steel billet is heated at a high temperature of 1250-1300 DEG C, wherein the heating time is controlled to be 200-500 min; in the rolling process of the steel billet, a large reduction rolling technology is adopted, the rolling reduction is controlled to be 120-150 mm, the final cooling temperature is controlled to be 950-1050 DEG C, and the steel rail is obtained; the steel rail passes from a finish rolling unit to a heat treatment unit and stays for the relaxation time of 150-300 s; and in a heat treatment unit, the initial cooling temperature range of heat treatment is 740-820 DEG C, the cooling rate is 5-15 DEG C/s, and the final cooling temperature is 200-250 DEG C. By adopting the production method of the low-yield-ratio high-strength bainite steel rail, the low-yield-ratio high-strength bainite steel rail with wear resistance and fatigue resistance can be obtained.
本发明公开了一种低屈强比高强贝氏体钢轨及其生产方法，该方法包括：采用含有0.1‑0.15重量％的碳的钢冶炼工艺冶炼钢坯；采用1250‑1300℃高温加热，且加热时间控制在200‑500min对钢坯进行加热；钢坯在轧制过程中，采用大压下轧制技术，压下量控制在120‑150mm，终冷温度介于950‑1050℃，得到钢轨；钢轨从终轧机组到热处理机组，停留150‑300s弛豫时间；在热处理机组内，热处理开冷温度范围为740‑820℃，冷却速率为5‑15℃/s，终冷温度为200‑250℃。本发明采用低屈强比高强贝氏体钢轨生产方法能够得到具有耐磨损性能、又具有耐疲劳性能的低屈强比高强贝氏体钢轨。
Low-yield-ratio high-strength bainite steel rail and production method thereof
The invention discloses a low-yield-ratio high-strength bainite steel rail and a production method thereof. The method is characterized in that a steel billet is smelted by adopting a steel smelting process containing 0.1-0.15 wt% of carbon; the steel billet is heated at a high temperature of 1250-1300 DEG C, wherein the heating time is controlled to be 200-500 min; in the rolling process of the steel billet, a large reduction rolling technology is adopted, the rolling reduction is controlled to be 120-150 mm, the final cooling temperature is controlled to be 950-1050 DEG C, and the steel rail is obtained; the steel rail passes from a finish rolling unit to a heat treatment unit and stays for the relaxation time of 150-300 s; and in a heat treatment unit, the initial cooling temperature range of heat treatment is 740-820 DEG C, the cooling rate is 5-15 DEG C/s, and the final cooling temperature is 200-250 DEG C. By adopting the production method of the low-yield-ratio high-strength bainite steel rail, the low-yield-ratio high-strength bainite steel rail with wear resistance and fatigue resistance can be obtained.
本发明公开了一种低屈强比高强贝氏体钢轨及其生产方法，该方法包括：采用含有0.1‑0.15重量％的碳的钢冶炼工艺冶炼钢坯；采用1250‑1300℃高温加热，且加热时间控制在200‑500min对钢坯进行加热；钢坯在轧制过程中，采用大压下轧制技术，压下量控制在120‑150mm，终冷温度介于950‑1050℃，得到钢轨；钢轨从终轧机组到热处理机组，停留150‑300s弛豫时间；在热处理机组内，热处理开冷温度范围为740‑820℃，冷却速率为5‑15℃/s，终冷温度为200‑250℃。本发明采用低屈强比高强贝氏体钢轨生产方法能够得到具有耐磨损性能、又具有耐疲劳性能的低屈强比高强贝氏体钢轨。
Low-yield-ratio high-strength bainite steel rail and production method thereof
一种低屈强比高强贝氏体钢轨及其生产方法
YUAN JUN (Autor:in) / HAN ZHENYU (Autor:in) / DENG YONG (Autor:in) / LI RUOXI (Autor:in)
01.02.2022
Patent
Elektronische Ressource
Chinesisch
High-toughness bainite steel rail and production method thereof
| Europäisches Patentamt | 2022
Medium-strength steel rail with high yield strength and production method thereof
| Europäisches Patentamt | 2022
Production method of novel high-strength wear-resistant bainite steel for frog
| Europäisches Patentamt | 2023
Moderate-strength steel rail and production method thereof
| Europäisches Patentamt | 2022