Effect of Niobium on Dynamic Recrystallization Behavior of 5%Ni Steel
LEI Xiao-rong1,DING Qing-feng1,2,CHEN Yuan-yuan1,RUI Xiao-long2,LI Shu-rui2,WANG Qing-feng1
1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China 2. Research and Development Center, Wuhan Iron and Steel Company, Wuhan 430080, Hubei, China
Effect of Niobium on Dynamic Recrystallization Behavior of 5%Ni Steel
LEI Xiao-rong1,DING Qing-feng1,2,CHEN Yuan-yuan1,RUI Xiao-long2,LI Shu-rui2,WANG Qing-feng1
1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China 2. Research and Development Center, Wuhan Iron and Steel Company, Wuhan 430080, Hubei, China
ժҪ The single-pass hot compressions of two 5%Ni steels with and without niobium addition at different temperatures of 800-1150 �� and strain rates of 0. 01-1 s-1 were performed by using a Gleeble-3500 thermal simulator and the effect of niobium on the dynamic recrystallization (DRX) behavior was analyzed. The results showed that the niobium addition of 0. 04% can retard DRX in 5%Ni steel significantly by increasing the activation energy for DRX from 394 to 462 kJ/mol. The critical strain required for starting DRX in 5%Ni steel was increased by 0. 04-0. 10 with niobium addition when the steel was deformed at a strain rate of 0. 01 s-1 and temperatures varied from 950 to 1000 ��. The critical temperature required for starting DRX in 5%Ni steel was also increased from 1000 to 1050 �� with niobium addition when the steel was deformed at a strain rate of 0. 1 s-1. Such a retarded DRX occurring in Nb-added 5%Ni steel can be attributed to the pinning effect of precipitates containing niobium.
Abstract��The single-pass hot compressions of two 5%Ni steels with and without niobium addition at different temperatures of 800-1150 �� and strain rates of 0. 01-1 s-1 were performed by using a Gleeble-3500 thermal simulator and the effect of niobium on the dynamic recrystallization (DRX) behavior was analyzed. The results showed that the niobium addition of 0. 04% can retard DRX in 5%Ni steel significantly by increasing the activation energy for DRX from 394 to 462 kJ/mol. The critical strain required for starting DRX in 5%Ni steel was increased by 0. 04-0. 10 with niobium addition when the steel was deformed at a strain rate of 0. 01 s-1 and temperatures varied from 950 to 1000 ��. The critical temperature required for starting DRX in 5%Ni steel was also increased from 1000 to 1050 �� with niobium addition when the steel was deformed at a strain rate of 0. 1 s-1. Such a retarded DRX occurring in Nb-added 5%Ni steel can be attributed to the pinning effect of precipitates containing niobium.
LEI Xiao-rong,DING Qing-feng,,CHEN Yuan-yuan,RUI Xiao-long,LI Shu-rui,WANG Qing-feng. Effect of Niobium on Dynamic Recrystallization Behavior of 5%Ni Steel[J]. �й������ڿ���, 2013, 20(6): 38-44.
LEI Xiao-rong,DING Qing-feng,,CHEN Yuan-yuan,RUI Xiao-long,LI Shu-rui,WANG Qing-feng. Effect of Niobium on Dynamic Recrystallization Behavior of 5%Ni Steel. Chinese Journal of Iron and Steel, 2013, 20(6): 38-44.
2013, Vol. 20 
