Strength of forged road or rail wheels —typically used in railway applications—can be characterized by several key mechanical properties. These wheels are usually made from high-strength steel and are manufactured through forging to ensure durability and performance under heavy loads.
The strength of forged road-rail wheels with coating remains fundamentally governed by the base material properties, but coating can enhance surface characteristics like wear resistance, corrosion resistance, and sometimes fatigue life. Here's a breakdown:
Effect of Coatings
Coatings do not increase the tensile or yield strength of the base wheel material, but they improve surface performance:
Summary for Coated Forged Road-Rail Wheels
| Aspect | Typical Value |
|---|---|
| Base Material Strength | 850–1150 MPa (tensile), 450–900 MPa (yield) |
| Hardness (base) | 250–320 HBW |
| Coating Thickness | 50–300 microns |
| Coating Effect | Improved wear, fatigue life, corrosion |
| Strength Gain (direct) | None (mechanically), only indirect benefits |