Wing rails are critical components that guide wheel flanges through crossings and switches, providing continuous support and guidance.
Basic Specifications
| Parameter | Standard Value | High-Speed | Heavy Haul |
|---|---|---|---|
| Length | 4.2-5.5m | 6.0-7.5m | 5.0-6.0m |
| Rail Profile | 54E1/60E1 | 60E1 | 68E1 |
| Hardness | 320-350 HB | 350-380 HB | 380-420 HB |
| Flangeway | 44-48mm | 46-50mm | 45-52mm |
| Gauge Face Angle | 1:20 | 1:40 | 1:20 |
Material Properties
| Property | Standard Rail | Heat Treated | Premium Grade |
|---|---|---|---|
| Tensile Strength | 880 N/mm² | 1200 N/mm² | 1300 N/mm² |
| Yield Strength | 500 N/mm² | 800 N/mm² | 900 N/mm² |
| Elongation | 10% | 9% | 8% |
| Impact Value | 20J | 25J | 30J |
| Hardness Range | 260-300 HB | 350-380 HB | 380-420 HB |
Wear Limits
| Measurement | New | Warning | Condemning |
|---|---|---|---|
| Vertical Wear | 0mm | 8mm | 12mm |
| Side Wear | 0mm | 6mm | 9mm |
| Head Loss | 0mm | 5mm | 8mm |
| Profile Deviation | 0mm | 2mm | 4mm |
| Gauge Face Angle | 1:20 | 1:15 | 1:12 |
Installation Tolerances
| Parameter | Nominal | Tolerance |
|---|---|---|
| Alignment | 0mm | ±1mm |
| Level | 0mm | ±1mm |
| Gauge | 1435mm | +2/-1mm |
| Flangeway Width | 45mm | +2/-1mm |
| Rail Cant | 1:20 | ±1:40 |
Machining Specifications
| Feature | Dimension | Tolerance |
|---|---|---|
| End Milling | 45° | ±1° |
| Surface Finish | Ra 3.2 | ±0.8 |
| Straightness | 0.2mm/m | +0.1/-0 |
| Web Thickness | Standard -0mm | +0/-1mm |
| Foot Width | Standard -0mm | +1/-0mm |
Regional Standards
Europe (UIC)
| Parameter | Value | Tolerance |
|---|---|---|
| Rail Profile | 60E1 | EN13674-1 |
| Steel Grade | R350HT | EN13674 |
| Hardness | 350 HB | ±30 HB |
| Surface Finish | Ra 3.2 | ±0.8 |
North America (AREMA)
| Parameter | Value | Tolerance |
|---|---|---|
| Rail Profile | 136RE | AREMA Ch.4 |
| Steel Grade | HH | ASTM A1 |
| Hardness | 340 HB | ±30 HB |
| Surface Finish | 125 μin | ±25 μin |
Maintenance Requirements
| Task | Frequency | Method |
|---|---|---|
| Visual Inspection | Weekly | Direct observation |
| Wear Measurement | Monthly | Digital gauge |
| Profile Check | Quarterly | Profile gauge |
| Geometry Check | Semi-annual | Track geometry car |
| NDT Testing | Annual | Ultrasonic |
Heat Treatment Specifications
| Process | Temperature | Duration |
|---|---|---|
| Preheating | 200-300°C | 1-2 hours |
| Hardening | 850-900°C | 20-30 min |
| Quenching | 200-250°C | As required |
| Tempering | 400-450°C | 2-3 hours |
| Cooling | Ambient | Natural |
Surface Treatment
| Treatment | Specification | Purpose |
|---|---|---|
| Grinding | Ra 3.2 | Smooth running |
| Shot Peening | 0.4-0.6mmA | Stress relief |
| Edge Profiling | R5mm | Stress reduction |
| Coating | Anti-corrosion | Protection |
| Lubrication | Gauge face | Wear reduction |
Quality Control
| Test | Method | Frequency |
|---|---|---|
| Hardness | Brinell | Each piece |
| Ultrasonic | Pulse-echo | 100% |
| Profile | Laser scan | 100% |
| Chemistry | Spectrometer | Per heat |
| Straightness | Optical | Each piece |
Common Defects
| Defect | Cause | Action |
|---|---|---|
| Spalling | Impact | Replace |
| Crushing | Overload | Replace |
| Cracking | Fatigue | NDT/Replace |
| Corrugation | Wheel slip | Grind |
| Gauge wear | Normal use | Monitor |
Performance Monitoring
| Parameter | Method | Limit |
|---|---|---|
| Wear Rate | Digital gauge | 2mm/year |
| Impact Load | Strain gauge | 250kN |
| Temperature | IR sensor | 50°C |
| Vibration | Accelerometer | 10g |
| Noise | Sound meter | 85dB |
