GB 24kg light rail is widely used in industrial transportation, small rail transit and other fields, and its service life directly affects the overall performance and cost-effectiveness of the rail system. Generally speaking, under ideal working conditions and good maintenance conditions, the design service life of GB 24kg light rail can reach 20-30 years, but the actual service life is affected by a combination of multiple complex factors.
Material is the basic factor that determines the service life of light rail. The common materials of GB 24kg light rail are 55Q or Q235B. 55Q material has good high temperature resistance and wear resistance. In high temperature environment or severe wear conditions, it can maintain relatively stable structural strength, which is conducive to extending the service life;
| 55Q | Mechanical property | Chemical composition(%) | |||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HBW | ≤ | ≤ | ||||
| ≥ | ≥ | ≥ | ≥ | ≥ | |||||||
| 685 | 69 | 197 | 0.50-0.60 | 0.15-0.35 | 0.60-0.90 | 0.04 | 0.04 | ||||
Q235B material has certain strength and toughness, and performs well in conventional use scenarios. However, if there are defects in the material itself, such as impurities, segregation and other problems inside, it will significantly reduce the mechanical properties of the light rail, making it more prone to wear, cracks and other damage during use, greatly shortening the service life.
| Q235B | Mechanical property | Chemical composition(%) | |||||||||
| Yield strength | Tensile strength | Elongation | Hardness | C | Si | Mn | S | P | |||
| MPa | kg/mm² | MPa | kg/mm² | min | HB | ≤ | ≤ | ≤ | |||
| ≥ | ≥ | ||||||||||
| 235 | 24 | 375-460 | 38-47 | 26% | 0.12-0.22 | 0.35 | 0.30-0.70 | 0.045 | 0.045 | ||
The use environment has a significant impact on the life of GB 24kg light rail. In an environment with high humidity and corrosive gases, such as coastal areas or chemical parks, the light rail is prone to electrochemical corrosion, and the surface metal is gradually oxidized, resulting in a reduction in the effective load-bearing cross-section and reduced strength.
The use intensity and maintenance conditions also affect the life of the GB 24kg light rail. If the light rail frequently carries heavy equipment, such as in industrial plants, where vehicles frequently run at full load, the light rail will be subjected to excessive pressure and fatigue loads, accelerating the deformation and wear of the track. On the contrary, if a scientific maintenance plan can be formulated, the light rail is regularly inspected, cleaned, lubricated, and minor damage is repaired in a timely manner, safety hazards can be eliminated in a timely manner, and the aging and wear process of the track can be slowed down. For example, by regularly grinding the rail surface, unevenness caused by wear can be eliminated, and the impact between the wheel and the track can be reduced, thereby extending the service life of the light rail.