Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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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 |
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.
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.
Process flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.
Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.
2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.
3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.
4. What is your production lead time?
With stock: Around 30 days
Without stock: 40–45 days
5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.
Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.