Jia Yihan, Wang Qingchen, Cao Changshan, Weng Yujuan. Experimental study on HRB500E seismic reinforcement bar produced by microalloying of high nitrogen ferrovanadium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 149-152. doi: 10.7513/j.issn.1004-7638.2022.06.022
Citation:
Jia Yihan, Wang Qingchen, Cao Changshan, Weng Yujuan. Experimental study on HRB500E seismic reinforcement bar produced by microalloying of high nitrogen ferrovanadium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 149-152. doi: 10.7513/j.issn.1004-7638.2022.06.022
Jia Yihan, Wang Qingchen, Cao Changshan, Weng Yujuan. Experimental study on HRB500E seismic reinforcement bar produced by microalloying of high nitrogen ferrovanadium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 149-152. doi: 10.7513/j.issn.1004-7638.2022.06.022
Citation:
Jia Yihan, Wang Qingchen, Cao Changshan, Weng Yujuan. Experimental study on HRB500E seismic reinforcement bar produced by microalloying of high nitrogen ferrovanadium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 149-152. doi: 10.7513/j.issn.1004-7638.2022.06.022
Based on the process and equipment of converter, continuous casting and rolling, the experimental study on the production of HRB500E high strength anti-seismic steel rebar by microalloying with high nitrogen ferrovanadium alloy was carried out. The results show that compared with vanadium-nitrogen alloy, the production of HRB500E anti-seismic steel rebar by microalloying with high nitrogen ferrovanadium alloy can save 22.2% vanadium and reduce the cost of vanadium alloying by RMB 17.98/ ton steel. The mechanical properties of steel rebars are stable and have low strain aging. The yield strength of Ø28 mm and Ø32 mm specifications are both reduced by 15 MPa, and tensile strength decreased by 2 MPa and 3 MPa respectively after aging for 15 days. The uniform elongations are increased by 0.7% and 0.8%, respectively. The strength yield ratio and yield standard ratio of steel rebars after aging are more reasonable and the seismic performance gets better. The metallographic structure of the steel rebar consists of pearlite + ferrite, and the grain size is ASTM 10, 1.0 grade higher than that of vanadium-nitrogen alloy. The tensile fracture contains equiaxed dimple. For welding test the fracture located in base metal, showing good weldability. There was no fracture after 2 million times of fatigue test, which met the fatigue life requirements of the new national standard GB/T 1499.2—2018.
Yang Fucai, Zhang Yongquan, Wang Ruizhen. Principles and applications of iron and steel metallurgy[M]. Beijing : Metallurgical Industry Press, 2012: 82-88.
[2]
Sun Qiaomei. Application and process optimization of micro nitrogen alloy in high strength rebar steel[J]. Hebei Metallurgy, 2018,(5):6−9. (孙巧梅. 微氮合金在高强度螺纹钢的应用与工艺优化[J]. 河北冶金, 2018,(5):6−9. doi: 10.13630/j.cnki.13-1172.2018.0502
[3]
Chen Wei, Zhao Yu, Zhang Weiqiang, et al. Using nitrogen-rich vanadium microalloying to produce large HRB500 steel[J]. Steel Research, 2011,39(1):23−27. (陈伟, 赵宇, 张卫强, 等. 采用富氮钒微合金化生产大规格HRB500钢筋[J]. 钢铁研究, 2011,39(1):23−27.
[4]
Deng Jianxin. Comparison of vanadium microalloying effect of ASEISMIC rebars in Xuangang[J]. Hebei Metallurgy, 2017,(7):41−44. (邓建新. 宣钢抗震钢筋钒微合金化效果对比[J]. 河北冶金, 2017,(7):41−44. doi: 10.13630/j.cnki.13-1172.2017.0709
DownLoad:
