钒氮微合金化HRB500E热轧带肋钢筋开发  

Development of Hot Rolled Ribbed Bars for V-N Micro-alloyed HRB500E

作　　者：郭跃华 Guo Yuehua(Pangang Group Panzhihua Iron and Steel Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀钢集团攀枝花钢铁研究院有限公司,钒钛资源综合利用国家重点实验室

出　　处：《钢铁钒钛》2019年第6期113-117,共5页Iron Steel Vanadium Titanium

摘　　要：HRB500E热轧带肋钢筋开发难点在于既要满足高强度,又要满足强屈比Ml.25抗震要求。国内部分钢厂采用VN16合金化工艺生产HRB500E,钢筋强屈比难以达到1.25,针对上述问题采用“VN16+FeV80”锐氮合金化工艺,将饥控制在0.07%-0.11%,氮控制在0.011%-0.015%,通过既发挥锐的析出强化作用又不至于飢过量析出导致强屈比显著下降技术手段,开发并批量稳定生产出强屈比富余量充足的012-032 mm规格HRB500E热轧带肋钢筋,解决了单独采用VN16合金化生产HRB500E钢筋强屈比不合格难题。The difficulty in developing the HRB500 E hot-rolled ribbed steel bars is not only to satisfy the high strength,but also ensure that the ratio of tensile/yield strength required for seismic resistance is greater than or equal to 1.25.Some domestic steel mills utilize the VN16 alloying process to produce HRB500 E,but the ratio of tensile/yield strength(Rm/ReL) is hard to reach 1.25.In view of the above problems,the "VN16+FeV80" V-N alloying process is added to control vanadium and nitrogen contents between 0.07%~0.11% and 0.011%~0.015%,respectively.Precipitation strengthening effect of vanadium had played its role,but on the other hand,excessive precipitation of vanadium had been avoided in order to control reasonable the Rm/ReL.Through controlling the vanadium precipitation,HRB500 E hot rolled rebars of ?12~?32 mm specifications had been successfully developed.

关 键 词：钢筋 HRB500E 帆微合金化 飢氮合金 饥铁合金 强屈比 强度 

分 类 号：TF704.2[冶金工程—钢铁冶金] TG141[一般工业技术—材料科学与工程]