摘要
预应力混凝土用螺纹钢筋简称精轧螺纹钢筋,因具有高强度、高精度、施工便捷而著称,结合广阔的市场前景,石横特钢决定在二炼钢开发屈服强度不低于830 MPa的PSB830级精轧螺纹钢筋。由于该钢种属于高Si低Mn钢种,且Mn/Si低(0.44~0.80),不利于脱氧合金化操作及连铸浇铸,通过对LF炉精炼工艺的实践,不仅实现了化学成分的精准控制,钢材批次之间性能差异控制在30 MPa以内,而且钢水纯净度达到了目标要求,有效保证了连铸浇铸质量。
Reinforced bar used for pre-stressed concrete is simply called as finish-rolling reinforced bar.It has broad market prospect with high strength,high precision and convenient to use.We decided to develop finish-rolling reinforced bar of PSB830 class with yield strength not lower than 830 MPa in the No.2 Steelworks.This steel grade belongs to high-Si and low-Mn grade and its Mn/Si is low(0.44 to 0.80),difficulty for deoxidation alloying operation and continuous casting.During the practice of refining process in LF furnace,it is but realized the precision control of chemical composition: performance difference between various patches being controlled within 30 MPa,also reached the target of purity degree and effectively guaranteed the quality of continuous casting.
出处
《河北冶金》
2012年第4期47-48,70,共3页
Hebei Metallurgy