王洪涛1[1]，李振亮2，王英宇2
(1.包头钢铁(集团)公司，包头 014010； 2.内蒙古科技大学材料与冶金学院，包头 014010)
关键词：HRB400E抗震钢筋；钒氮微合金化；高速线材；控冷温度；硬度
中图分类号：TG335.12文献标识码：A
摘 要：对预精轧后钒氮微合金化HRB400E抗震钢筋进行淬水试验，研究淬水时间对钢筋表面温度、金相组织、硬度的影响。结果表明，HRB400E抗震钢筋Ø20mm试样在水中的冷却时间应控制在1~3秒之间才能保证其良好的入精轧温度范围，在1010℃保温20分钟水冷到室温，在钢筋中会形成少量马氏体、魏氏组织，维氏硬度453Hv。
Effects of controlled cooling temperature before finishing mill on microstructure and properties of v-n microalloyed anti-seismic rebars
Wang Hong-tao1, Li Zhen-liang2 , WangYing-yu2
(1.Baotou Iron and Steel (Group) Corporation, Baotou 014010, China; 2.School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China)
Key words:HRB400E anti-seismic rebars; vanadium nitride microalloy;high speed wire rod; controlled cooling
temperature; hardness
Abstract:The effect of water-quenching time on the surface temperature, microstructure and hardness was researched by means of water-quenching treatment of vanadium nitride microalloy HRB400E anti-seismic rebars produced after pre-finishing mill. The results show that Ø20mm rebar has a suitable finishing-temperature range under 1~3 seconds water-quenching treatment, with small amount of martensite and widmanstatten structures formed in steel matrix while keeping it at 1010 ℃ for 20 minutes ，then water-quenching to room temperature, and the hardness is 453Hv.