A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a production method of nano-structure bainite steel for a frog, the steel for the frog comprises the following components in percentage by mass: 0.24-0.40% of C, 1.40-1.80% of Si, 1.60-2.10% of Mn and 1.00-1.60% of Cr, and the method comprises the following steps: S1, heating a steel billet obtained after smelting and casting to 1150-1200 DEG C; s2, the heated steel billet is rolled or forged; s3, the steel for the frog obtained after rolling or forging is subjected to heat treatment through waste heat, the cooling rate of heat treatment ranges from 20 DEG C/s to 25 DEG C/s, the final cooling temperature ranges from 200 DEG C to 250 DEG C, and the heat preservation time ranges from 120 min to 360 min; and S4, the cooled steel for the frog is tempered. According to the method, the obdurability of the bainite frog can be further improved, meanwhile, the depth of a hardened layer is increased, and the running safety of the frog is improved.
本发明公开了一种纳米结构贝氏体辙叉用钢的生产方法，所述辙叉用钢按质量百分比计包含0.24～0.40％的C、1.40～1.80％的Si、1.60～2.10％的Mn和1.00～1.60％的Cr，所述方法包括以下步骤：S1，对冶炼、浇铸后获得的钢坯加热至1150～1200℃；S2，对加热后的钢坯进行轧制或锻造；S3，利用余热对轧制或锻造后获得的辙叉用钢进行热处理，所述热处理的冷却速率为20～25℃/s、终冷温度为200～250℃、保温时间为120～360min；S4，对冷却后的辙叉用钢进行回火。本发明的方法能够进一步改善贝氏体辙叉的强韧性，同时增大硬化层的深度，提高辙叉运行安全性。
The invention discloses a production method of nano-structure bainite steel for a frog, the steel for the frog comprises the following components in percentage by mass: 0.24-0.40% of C, 1.40-1.80% of Si, 1.60-2.10% of Mn and 1.00-1.60% of Cr, and the method comprises the following steps: S1, heating a steel billet obtained after smelting and casting to 1150-1200 DEG C; s2, the heated steel billet is rolled or forged; s3, the steel for the frog obtained after rolling or forging is subjected to heat treatment through waste heat, the cooling rate of heat treatment ranges from 20 DEG C/s to 25 DEG C/s, the final cooling temperature ranges from 200 DEG C to 250 DEG C, and the heat preservation time ranges from 120 min to 360 min; and S4, the cooled steel for the frog is tempered. According to the method, the obdurability of the bainite frog can be further improved, meanwhile, the depth of a hardened layer is increased, and the running safety of the frog is improved.
本发明公开了一种纳米结构贝氏体辙叉用钢的生产方法，所述辙叉用钢按质量百分比计包含0.24～0.40％的C、1.40～1.80％的Si、1.60～2.10％的Mn和1.00～1.60％的Cr，所述方法包括以下步骤：S1，对冶炼、浇铸后获得的钢坯加热至1150～1200℃；S2，对加热后的钢坯进行轧制或锻造；S3，利用余热对轧制或锻造后获得的辙叉用钢进行热处理，所述热处理的冷却速率为20～25℃/s、终冷温度为200～250℃、保温时间为120～360min；S4，对冷却后的辙叉用钢进行回火。本发明的方法能够进一步改善贝氏体辙叉的强韧性，同时增大硬化层的深度，提高辙叉运行安全性。
Production method of nano-structure bainite frog steel
纳米结构贝氏体辙叉用钢的生产方法
2023-03-28
Patent
Electronic Resource
Chinese
IPC:
C21D
Veränderung der physikalischen Struktur von Eisenmetallen
,
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
/
B21H
MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
,
Herstellen besonderer Gegenstände aus Metall durch Walzen, z.B. Schrauben, Räder, Ringe, Büchsen, Kugeln
/
B21J
FORGING
,
Schmieden
/
B21K
MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
,
Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C22C
Legierungen
,
ALLOYS
/
E01B
PERMANENT WAY
,
Gleisoberbau
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