低成本铌钒复合微合金化抗震钢筋HRB400E生产实践

Production practice of low-cost Ni-V composite microalloying anti-seismic steel bar HRB400E

结合棒材生产线的工艺装备实际,进行了抗震钢筋HRB400E铌钒复合微合金化工艺研究与生产实践。通过控制加热温度及开轧温度提高铌的固溶度,轧后采用微穿水工艺加速铁素体相变并减少贝氏体产生,解决了含铌钢筋拉伸试验应力-应变曲线屈服平台不明显、市场接受度差的问题,同时避免了单纯采用铌微合金化钢筋大规格屈服强度不足的问题。铌钒复合微合金化抗震钢筋HRB400E符合国家标准质量要求,降低了合金成本,有利于抗震钢筋HRB400E的推广应用。

The research and production practice of anti-seismic steel bar HRB400 E niobium vanadium composite microalloying technology were carried out according to actual technology of bar production line.By controlling heating temperature and improving solid solubility of niobium open rolling temperature,rolling after adopting micro wear water process accelerated ferritic phase transformation and reduce bainite,solved the problems that the containing niobium steel tensile test stress and strain curve yield platform is not obvious,of poor market acceptance,at the same time avoid the pure big specification using niobium microalloyed steel yield strength.Niobium vanadium compound microalloyed aseismic reinforcement HRB400 E conform to the requirements of the national standards of quality,reduce cost of the alloy,it is advantageous to anti-seismic steel bar HRB400 E popularization and application.