In order to increase the strength and yield strength-to-tensile strength ratio of the aseismatic rebar, high-strength aseismatic rebar HRBS00E was produced by employing different microalloying way and cooling process after rolling according to practical production conditions of bar and wire rod units in Pan- gang Group Chengdu Steel ＆ Vanadium Co. Ltd. When 0 6 - 12 mm HRB500E was produced by high speed wire mill, the steel was micro-alloyed by VN and Stelmor wind cooling process was adopted. After 0.08%-0. II% of Vwas added to the steel, V to N ratio was close to 4：1. When 0 14-40 mm HRBS00E was produced by bar mill, the steel was micro-alloyed by VN ＋ Mo, and natural cooling was a- dopted. 0.06% -0.12% V and 0.03% -0.05% Mo were added to the steel, and V to N ratio was close to 4：1 after the addtion. The results show that the rebar HRB500E so produced is of high strength and good anti-seismic properties, and satisfies the national standards and client requirements.
Iron Steel Vanadium Titanium
aseismatic rebar, HRB500E, multi-microalloying, VN, VN ＋ Mo, strength, yield strength-to- tensile strength ratio