Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Production method of heavy haul railway large-radius curve heat treatment steel rail
The invention discloses a production method of a heavy haul railway large-radius curve heat treatment steel rail. The production method comprises the steps of raw material condition selection, converter smelting, LF ladle refining, VD vacuum degassing, continuous casting, steel billet heating, steel rail rolling, hot printing, steel rail heat treatment, straightening, ultrasonic flaw detection and component performance inspection. When the U75VH heat treatment steel rail is produced, the inlet temperature is 770-820 DEG C, the outlet temperature is 430-460 DEG C, the air pressure value is 14-18 KPa, and the roller way speed is 1.0-1.3 m/s. According to the steel rail delivered in the heat treatment state, the tensile strength Rm is larger than or equal to 1250 MPa, the percentage elongation after fracture A is larger than or equal to 10%, the tread hardness (HB) is 365-400, and the rail head cross section hardness (HRC) Al, B1, Cl, D1 and El ranges from 37 to 42; rail head cross section hardness (HRC) A4, B5, C5, D3 and E3 is larger than or equal to 35, and abrasion resistance is improved by 50% compared with that of a U75V heat treatment steel rail.
本发明公开了重载铁路大半径曲线热处理钢轨生产方法，包括：原料条件—转炉冶炼—LF钢包精炼—VD真空脱气—连铸—钢坯加热—钢轨轧制—热打印—钢轨热处理—矫直—超声波探伤—成分性能检验；生产U75VH热处理钢轨入口温度：770～820℃，出口温度：430～460℃，风压值：14～18KPa，辊道速度：1.0～1.3m/s。本发明以热处理状态交货的钢轨抗拉强度Rm≥1250MPa，断后伸长率A≥10％，踏面硬度(HB)365～400，轨头横断面硬度(HRC)Al、Bl、Cl、Dl、El：37～42；轨头横断面硬度(HRC)A4、B5、C5、D3、E3：≥35，耐磨性相比U75V热处理钢轨提高50％。
Production method of heavy haul railway large-radius curve heat treatment steel rail
The invention discloses a production method of a heavy haul railway large-radius curve heat treatment steel rail. The production method comprises the steps of raw material condition selection, converter smelting, LF ladle refining, VD vacuum degassing, continuous casting, steel billet heating, steel rail rolling, hot printing, steel rail heat treatment, straightening, ultrasonic flaw detection and component performance inspection. When the U75VH heat treatment steel rail is produced, the inlet temperature is 770-820 DEG C, the outlet temperature is 430-460 DEG C, the air pressure value is 14-18 KPa, and the roller way speed is 1.0-1.3 m/s. According to the steel rail delivered in the heat treatment state, the tensile strength Rm is larger than or equal to 1250 MPa, the percentage elongation after fracture A is larger than or equal to 10%, the tread hardness (HB) is 365-400, and the rail head cross section hardness (HRC) Al, B1, Cl, D1 and El ranges from 37 to 42; rail head cross section hardness (HRC) A4, B5, C5, D3 and E3 is larger than or equal to 35, and abrasion resistance is improved by 50% compared with that of a U75V heat treatment steel rail.
本发明公开了重载铁路大半径曲线热处理钢轨生产方法，包括：原料条件—转炉冶炼—LF钢包精炼—VD真空脱气—连铸—钢坯加热—钢轨轧制—热打印—钢轨热处理—矫直—超声波探伤—成分性能检验；生产U75VH热处理钢轨入口温度：770～820℃，出口温度：430～460℃，风压值：14～18KPa，辊道速度：1.0～1.3m/s。本发明以热处理状态交货的钢轨抗拉强度Rm≥1250MPa，断后伸长率A≥10％，踏面硬度(HB)365～400，轨头横断面硬度(HRC)Al、Bl、Cl、Dl、El：37～42；轨头横断面硬度(HRC)A4、B5、C5、D3、E3：≥35，耐磨性相比U75V热处理钢轨提高50％。
Production method of heavy haul railway large-radius curve heat treatment steel rail
一种重载铁路大半径曲线热处理钢轨生产方法
ZHENG RUI (Autor:in) / LIANG ZHENGWEI (Autor:in)
18.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
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
/
C22C
Legierungen
,
ALLOYS
/
E01B
PERMANENT WAY
,
Gleisoberbau
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