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As the global energy structure accelerates its transformation towards cleaner and lower-carbon energy, wind power and photovoltaic power generation have become the core growth poles in the field of new energy. However, with the rapid expansion of installed capacity, the industry has put forward higher requirements on the performance, cost and environmental adaptability of key materials. The limitations of traditional support materials (such as ordinary steel, aluminum alloy, etc.) in terms of corrosion resistance, lightweight or economy are gradually emerGIng.
1. Process advantages and performance characteristics of hot-rolled wire rod
High strength and high toughness: Through controlled rolling and controlled cooling technology, the yield strength of hot-rolled Wire rods can reach more than 500MPa, and the tensile strength exceeds 600MPa, which can effectively cope with the high wind load of wind turbine towers and the long-term static load requirements of photovoltaic brackets.
Weather resistance and corrosion resistance: Hot-rolled wire rods (such as weathering steel materials) with the addition of alloy elements such as copper, chromium, and nickel can form a dense oxide film on the surface, significantly reducing the corrosion rate in salt spray and hot and humid environments, and extending the life of the bracket to more than 30 years.
Economic efficiency and machinability: The Hot Rolling process has low cost and high production efficiency, and the curling form of the wire rod is easy to transport and process on site. With the cold bending forming technology, complex cross-section profiles can be quickly customized to reduce welding processes.
2. Wind power field: Lightweight breakthroughs in towers and foundation structures
The height of wind power towers generally exceeds 100 meters. Traditional towers mostly use thick steel plate welded structures, which have pain points such as heavy weight, difficult transportation, and high welding costs. Hot-rolled wire rods promote innovation in the following ways:
High-strength tower connectors: Prestressed anchor bolts and high-strength bolts made of hot-rolled wire rods can replace traditional welded nodes, improve the overall fatigue resistance of the tower, and reduce the weight of the tower by 10%-15%.
Modular foundation structure: Lattice pile foundations formed by cold bending of hot-rolled wire rods can reduce the amount of concrete by 30% in offshore wind power, while adapting to complex geological conditions and shortening the construction period.
Economic comparison: After optimizing the structure with hot-rolled wire rods, the material cost of a single tower is reduced by about 8%, and the maintenance cost of the entire life cycle is reduced by 20%.
3. Photovoltaic bracket: full-scenario adaptation from fixed to tracking system
Photovoltaic brackets need to be lightweight and low-cost while ensuring structural stability. The application of hot-rolled wire rods covers all scenario requirements:
Fixed bracket system: C-shaped steel and Z-shaped steel brackets made of Q355B and above hot-rolled wire rods have a yield strength that is 50% higher than that of traditional Q235 steel, and the material consumption is reduced by 25% under the same load, significantly reducing the cost of land foundation.
Dual-axis tracking bracket: High-precision slewing support components processed by hot-rolled wire rods can withstand mechanical wear caused by hundreds of angle adjustments per day. With surface galvanizing, they can achieve 20 years of maintenance-free operation in harsh environments such as deserts and coastal areas.
Flexible bracket innovation: The prestressed cable net structure woven with hot-rolled wire rods is suitable for mountain photovoltaic projects with large terrain undulations, reducing the number of pile foundations by 30%-40% and improving land utilization.
In the future, through cross-innovation in materials science, structural design and digital manufacturing, hot-rolled wire rod is expected to become the "invisible backbone" of new energy infrastructure, supporting the efficient construction and long-term operation of green energy systems.
