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角钢是输变电铁塔主要使用的材料,在中国北方,尤其是高寒地区,对角钢的耐低温冲击韧性有严苛的技术要求,可防止铁塔在低温条件下产生脆性断裂,而国内高寒地区铁塔角钢的设计使用级别偏低,而且生产高级别的低温角钢企业也不多。研究了钢中常用的主要元素和V、Al等微合金元素,以及钢中夹杂物、金相组织、晶粒度等对角钢材料低温冲击韧性的影响,掌握了角钢生产关键技术参数和操作的控制方法,对生产实践有显著的指导意义。
Angle steel is the main power transmission tower materials used in northern China, especially in the alpine region, the low temperature toughness of the diagonal steel has stringent technical requirements to prevent the tower in the low temperature conditions to produce brittle fracture, and the towering iron tower Angle design and use of low level, and the production of high-level low-temperature angle steel business is not much. The main elements commonly used in steel and V, Al and other microalloying elements, as well as inclusions in steel, microstructure, grain size and other low-temperature impact toughness of angle steel materials, mastered the angle steel production key technical parameters and operation Control methods, the production practice has a significant guiding significance.