20CrMnTi Forged Gear Wear Resistant For Railway Heavy Metal Forge Traction Gearbox Units
20CrMnTi Wear-Resistant Forged Gear for Railway Traction Gearbox Units
Engineered for the demanding conditions of rail transportation, the 20CrMnTi Wear-Resistant Forged Gear for Railway Traction Gearbox Units offers high surface hardness, superior fatigue resistance, and excellent dimensional stability under heavy-load and high-speed conditions. Using premium alloy steel 20CrMnTi, this gear is precision forged and heat-treated to deliver exceptional wear resistance—ideal for long-term operation in traction systems of locomotives, EMUs, and metro vehicles.
Each gear undergoes a controlled forging process followed by case carburizing and quenching to achieve a hard, wear-resistant outer layer with a tough, ductile core. This ensures durability, low noise transmission, and extended service life even under fluctuating torque and braking loads.
| Item | Details |
|---|---|
| Product Name | 20CrMnTi Wear-Resistant Forged Gear for Railway Traction Gearbox Units |
| Material Grades | - 20CrMnTi alloy steel optimized for surface hardness and core ductility - Custom compositions available for high-speed, heavy-load traction applications |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Supports open die forging of medium to large railway gear blanks |
| Manufacturing Process | Forging → Heat Treatment → Rough Machining → Gear Hobbing/Shaping → Gear Grinding (if needed) → Final Machining → Dimensional & Non-Destructive Inspection |
| Forging Ratio | ≥ 3.0 — Ensures directional grain flow, structural integrity, and resistance to dynamic fatigue stresses |
| Heat Treatment Options | - Carburizing + Quenching + Tempering for hardened tooth surface and tough gear core - Induction hardening available for selective reinforcement |
| Applications | - Drive gears in railway traction gearboxes - Power transmission gears for locomotives, EMUs, metros, and urban rail - Ideal for traction systems requiring frequent acceleration, high torque, and low noise |
| Process Compliance | Produced in accordance with customer engineering specifications and performance requirements |
| Delivery Conditions | - Heat treated and delivered as rough-machined or fully finished gears - Optional surface hardening tailored to traction load profiles |
| Testing & Inspection | - Chemical Analysis - Mechanical Properties: Tensile Strength, Impact, Hardness - Non-Destructive Testing: UT, MT |
Product Features
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High Surface Hardness
Through precision carburizing and quenching, the gear achieves a surface hardness of HRC58–62, ensuring excellent wear resistance under continuous high-load operation. -
Superior Core Toughness
20CrMnTi alloy steel provides a strong, ductile core, enhancing shock absorption and crack resistance during frequent acceleration and braking cycles. -
Optimized Tooth Geometry
Advanced hobbing and finishing techniques ensure low noise, high contact precision, and smooth torque transmission. -
Long Service Life
Engineered to resist surface pitting, scuffing, and tooth root fatigue, significantly extending maintenance intervals and lowering life-cycle costs. -
Consistent Dimensional Stability
Thermal and mechanical treatment ensures tight tolerances are maintained, critical for gearbox reliability at high speeds.
Application Scenarios
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Railway Traction Gearboxes
Used in drive systems of electric and diesel locomotives, high-speed trains, metro cars, and light rail vehicles. -
High-Load Transmission Units
Suitable for main traction gears, intermediate transmission stages, and reduction gears in railway powertrains. -
Urban Mass Transit & Intercity Rail
Reliable under frequent start-stop conditions and high cycling demand typical in city and regional transport systems. -
Heavy-Duty Mobility Systems
Ideal for axle-mounted gearboxes and gear-coupled wheel drives requiring durability, precision, and low maintenance.
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