Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rolling contact fatigue resistant steel rail for passenger and freight mixed transportation railway and production method of rolling contact fatigue resistant steel rail
The invention discloses a rolling contact fatigue resistant steel rail for a passenger and freight mixed transportation railway. The rolling contact fatigue resistant steel rail is characterized by comprising the following chemical components in percentage by weight: 0.75 to 0.88 percent of C, 0.10 to 0.60 percent of Si, 0.75 to 1.30 percent of Mn, 0.20 to 0.55 percent of Ni, 0.10 to 0.20 percent of V, 0.03 to 0.06 percent of Nb, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S and the balance of Fe and inevitable impurities. The production process comprises the following procedures of molten iron desulphurization, converter smelting, LF refining, vacuum treatment, continuous casting, casting blank heating, rolling, accelerated cooling and straightening. By reasonably setting chemical components and smelting and rolling processes, the rail head, the rail web and the rail bottom of the rolled steel rail are subjected to accelerated cooling at different cooling speeds, so that the yield ratio of the rail head of the steel rail is well matched with the impact toughness of the rail web, the comprehensive use performance of the steel rail is improved, the service life of the steel rail is prolonged, and the development requirements of railways are met; the method is simple, high in operability and easy to popularize and apply.
本发明公开了一种客货混运铁路用耐滚动接触疲劳钢轨，其特征在于化学成分按重量百分数计0.75‑0.88％的C、0.10‑0.60％的Si、0.75‑1.30％的Mn、0.20‑0.55％的Ni、0.10‑0.20％的V、0.03‑0.06％的Nb、≤0.025％的P、≤0.025％的S，其余为Fe和不可避免的杂质；生产过程包括以下工序：铁水脱硫、转炉冶炼、LF精炼、真空处理、连铸、铸坯加热、轧制、加速冷却、矫直；本发明通过合理设置化学成分以及冶炼、轧制工艺，同时对轧后钢轨轨头、轨腰和轨底进行不同冷速的加速冷却，实现钢轨轨头屈强比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；方法简单，可操作性强，易于推广应用。
Rolling contact fatigue resistant steel rail for passenger and freight mixed transportation railway and production method of rolling contact fatigue resistant steel rail
The invention discloses a rolling contact fatigue resistant steel rail for a passenger and freight mixed transportation railway. The rolling contact fatigue resistant steel rail is characterized by comprising the following chemical components in percentage by weight: 0.75 to 0.88 percent of C, 0.10 to 0.60 percent of Si, 0.75 to 1.30 percent of Mn, 0.20 to 0.55 percent of Ni, 0.10 to 0.20 percent of V, 0.03 to 0.06 percent of Nb, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S and the balance of Fe and inevitable impurities. The production process comprises the following procedures of molten iron desulphurization, converter smelting, LF refining, vacuum treatment, continuous casting, casting blank heating, rolling, accelerated cooling and straightening. By reasonably setting chemical components and smelting and rolling processes, the rail head, the rail web and the rail bottom of the rolled steel rail are subjected to accelerated cooling at different cooling speeds, so that the yield ratio of the rail head of the steel rail is well matched with the impact toughness of the rail web, the comprehensive use performance of the steel rail is improved, the service life of the steel rail is prolonged, and the development requirements of railways are met; the method is simple, high in operability and easy to popularize and apply.
本发明公开了一种客货混运铁路用耐滚动接触疲劳钢轨，其特征在于化学成分按重量百分数计0.75‑0.88％的C、0.10‑0.60％的Si、0.75‑1.30％的Mn、0.20‑0.55％的Ni、0.10‑0.20％的V、0.03‑0.06％的Nb、≤0.025％的P、≤0.025％的S，其余为Fe和不可避免的杂质；生产过程包括以下工序：铁水脱硫、转炉冶炼、LF精炼、真空处理、连铸、铸坯加热、轧制、加速冷却、矫直；本发明通过合理设置化学成分以及冶炼、轧制工艺，同时对轧后钢轨轨头、轨腰和轨底进行不同冷速的加速冷却，实现钢轨轨头屈强比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；方法简单，可操作性强，易于推广应用。
Rolling contact fatigue resistant steel rail for passenger and freight mixed transportation railway and production method of rolling contact fatigue resistant steel rail
一种客货混运铁路用耐滚动接触疲劳钢轨及其生产方法
FEI JUNJIE (Autor:in) / ZHOU JIANHUA (Autor:in) / LIU FANGMING (Autor:in) / ZHU MIN (Autor:in) / HE WENJI (Autor:in) / OUYANG MINLU (Autor:in)
28.06.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C22C
Legierungen
,
ALLOYS
/
B21B
Walzen von Metall
,
ROLLING OF METAL
/
B22D
CASTING OF METALS
,
Gießen von Metallen
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
/
C21D
Veränderung der physikalischen Struktur von Eisenmetallen
,
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
/
E01B
PERMANENT WAY
,
Gleisoberbau
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