EFFECT OF Nb, Ti AND V ON THE HOT DEFORMATION BEHAVIOR OF LOW CARBON Nb MICROALLOYED STEELS
EFFECT OF Nb, Ti AND V ON THE HOT DEFORMATION BEHAVIOR OF LOW CARBON Nb MICROALLOYED STEELS
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DOI：
10.3724/sp.j.1037.2009.00858
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发表时间：
2010-07
影响因子：
2.3
通讯作者：
Wu Jin-Ban;Yu Gao;Liu Guoquan
中科院分区：
文献类型：
--
作者：
Wu Jin-Ban;Yu Gao;Liu Guoquan
The characteristic values such as critical straine_c,peak straine_p,critical stressσ_c,peak stressσ_p and steady-state stressσ_(ss)were obtained from work-hardening rate-flow stress (θ-σ)curves based on the thermal/mechanical simulation data of 6 microalloyed steels with different contents of Nb,Ti and V.The results show that the peak stressσ_p was raised with the increasing contents of Nb,Ti and V,while thee_c/e_p value for all the experimental steels are in the range of 0.50—0.65.Then the Avrami kinetic curves of dynamic recrystallization were calculated fromσ-ecurves for the 6 steels,which are very similar to those curves obtained by metallographic methods. With the increase of content of Nb and Ti,the corresponding Avrami curve shifted to the right and the dynamic recrystallization kinetics were hindered;while simultaneously adding Ti and V into Nb microalloyed steel would lead to the dynamic recrystallization to be initiated at much lower strain rate.
