Effect of Deformation and Holding Time after Deformation on Inverse Transformation of Deformation Induced Ferrite in Q235 Steel

The influence of deformation and holding time on the inverse transformation phenomenon of deformation induced ferrite in Q235 steel was investigated by observation of microstructure of the specimen which experienced a hot compression process on Gleeble1500 thermomechanical simulator.The results indicated that the speed for inverse transformation of deformation induced ferrite increased with the increase of strain at the same temperature and strain rate.The ferrite content decreased first and then increased with the increase of holding time.Two different causes resulted in the ferrite grain growth.