Wind energy is one of the key development of clean energy and new energy in China, and it is the direction of the adjustment of China's power structure. The manufacture of wind power tower has higher requirements for the strength and toughness of steel plate. The steel plate of wind tower is mainly used to make the structure of wind power tower, which requires high strength, low temperature toughness, strong fracture resistance, good welding performance and surface quality.Wind Turbine Tower In order to meet the special requirements of the steel performance of Wind tower, Tianjin Iron and Steel Group Co., Ltd. (hereinafter referred to as Tin Steel) has carried out the development and development of the Wind tower steel plate.Wind Turbine Tower
In chemical composition, the design of the reduction component of NB Micro-alloying element was adopted, by controlled rolling and controlled cooling technology, the mechanical properties of the steel are ensured and the production cost is reduced. Through the research and practice on the surface of the slab, the low SI content and the new high-pressure water descaling process were developed, and the national invention patent was applied, The problem of "Ma Keng" caused by the pressure of oxidized iron sheet in the industry is solved, and the surface quality of the steel plate for the wind tower is ensured.
Compared with the standard requirements of wind tower steel, the mechanical properties of q345d/e low alloy high strength steels have a larger margin, in which the yield strength has 90-110mpa allowance, the tensile strength has 80-100mpa allowance, and the low temperature impact power allowance is also around 55-97j. Therefore, the wind tower steel q345d/e in the composition design using the reduction, the addition of NB, by optimizing the rolling process, reduce the two-stage rolling temperature and ACC final cooling temperature, to ensure that the mechanical properties of the product requirements are feasible.Wind Turbine Tower In order to improve the billet quality, the converter adopts the principle of concentrate, controls the composition and temperature of molten iron in the furnace, enhances the end-point smelting rate and strictly controls the deoxidation product of the steel. The process operation of refining and reducing slag was enhanced, and deep desulfurization was carried out to reduce the content of harmful elements in steel. Continuous casting control reasonable matching of injection temperature, and two cold zone of water, reduce slab defects, improve the quality of slab.Wind Turbine Tower