EFFECT OF NIOBIUM ON THE STATIC RECRYSTALLIZATION OF 5Ni CRYOGENIC STEEL

摘要：

　　The double-pass hot compressions test of 5Ni steel containing different niobium was simulated by using the Gleeble-3500 thermal simulator and the effects of niobium on the static recrystallization behavior of the testing steels were analyzed.The critical rolling technological parameters during industrial production were proposed.The results showed that the effects of deformation temperature and interpass time on the softening in multi-stage hot deformation were significant.The volume fraction of static recrystallization(XSRX)increased with the increase of the deformation temperature and the interval time.The niobium addition could impede the static recrystallization of the experimental steel.The solute drag effect of niobium in solid solution was the main reason that retarded recrystallization at high temperature,and the pinning effect of fine Nb(C,N)precipitates was the main reasonat low temperature.The finish rolling should start at a temperature lower than 925℃ to avoid mixed crystal for Nb-microalloyed 5Ni steel.

关键词： 5Ni steel Static Recrystallization Niobium Solute Drag Effect Pinning Effect

作者: Xiao-rong Lei Jue-fei Chu Lie-yun He Qing-feng Wang

作者单位: Department of Technology and Quality,Nanjing Iron and Steel Company Limited,Nanjing 210035,China;Col Department of Technology and Quality,Nanjing Iron and Steel Company Limited,Nanjing 210035,China College of Materials Science and Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 895-901

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）