Weathering resistant steel and steel plate and angle steel manufacture methods by adopting weathering resistant steel

Abstract

The invention provides a weathering resistant steel and steel plate and angle steel manufacture methods by adopting the weathering resistant steel. The weathering resistant steel comprises, by mass, 0.05-0.20% of C, 0.20-0.40% of Si, 0.80-1.60% of Mn, 0.05-0.80% of Cu, 0.05-0.85% of Cr, 0.01-0.1% of Nb, 0.15-0.70% of Ni, smaller than or equal to 0.12% of Ti, smaller than or equal to 0.30% of Mo, smaller than or equal to 0.12% of V, smaller than or equal to 0.15% of Zr, smaller than or equal to 0.03% of P, smaller than or equal to 0.006% of S, 0.01-0.05% of Al, 0.002-0.005% of N, smaller than or equal to 0.002% of O and the balance Fe and unavoidable impurities. The weathering resistant steel has excellent corrosion resistance performance and excellent mechanical properties such as stretching, impact and bending and can meet the mechanical demand of application in a power transmission and transformation iron tower after being thinned, the cost of raw materials is lowered, the power transmission iron tower adopting the weathering resistant steel does not need the processing cost of hot galvanizing, and the anticorrosion maintenance cost in the later period can also be reduced, whichhelps to reduce the construction cost. In addition, the hot-dip galvanizing process is omitted, and the pollution to the atmosphere and soil environments is reduced. The weathering resistant steel hasobvious economic benefits and an environment protection effect, the mechanical properties and the corrosion resistance performance of the weathering resistant steel are improved, and the service lifeof the weathering resistant steel is greatly prolonged.

Description

technical field [0001] The invention relates to raw materials used in power transmission and transformation projects and a forming process thereof, in particular to a weather-resistant steel and its steel plate manufacturing method and angle steel manufacturing method. Background technique [0002] With the development of scientific and technological progress, more and more materials and products have been developed unprecedentedly. In production and life, metal materials are widely used and have been irreplaceable in many fields. The demand for metals in power transmission and transformation projects continues to grow, especially non-metallic materials for the construction of power transmission towers. However, with the passage of time, the metal materials in the transmission towers have gradually exposed many problems and defects. [0003] At present, many transmission towers are easy to rust and corrode, and need to reach a certain thickness to meet the strength require...

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Problems solved by technology

However, with the passage of time, the metal materials in the transmission towers have gradually exposed many problems and defects.

[0003] At present, many transmission towers are easy to rust and corrode, and need to reach a certain thickness to meet the strength requirements, and the processing process is complex and time-consuming, requiring complicated pickling, hot-dip galvanizing and other processes, and there is a certain pollution to the atmosphere and soil environment. , the maintenance process is frequent and complicated

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