Abstract：The Gleeble-3800 hydraulic wedge unitis used for unidirectional hot compression of niobium HRB400. The stress-strain curves are obtained by experiments to study the effect of the change of hot deformation parameters on HRB400Nb. And the effect of different hot deformation parameters on microalloyed HRB400 with Nb is studied，which provided experimental basis for the formulation of the hot working process of microalloyed rebar. The results show that the studied HRB400 Nb steel is sensitive to both temperature and strain rate，and exhibits intermittent dynamicre crystallization behavior at high strain rate.
2019, Vol. 37 
