Production of High-strength Aseismatic Rebar HRB500E Multi-microalloyed with VN or VN + Mo

In order to increase the strength and yield strength-to-tensile strength ratio of the aseismatic rebar,high-strength aseismatic rebar HRB500E was produced by employing different microalloying way and cooling process after rolling according to practical production conditions of bar and wire rod units in Pangang Group Chengdu Steel & Vanadium Co.,Ltd.When Ø 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%~0.11% of V was added to the steel,V to N ratio was close to 4:1.When Ø 14~40 mm HRB500E was produced by bar mill,the steel was micro-alloyed by VN + Mo,and natural cooling was adopted.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.