Thermal Deformation for Fe-1.6%Si Non-Grain Orientated Silicon Steel

Thermal simulation tests for the Fe-1.6%Si non-grain orientated silicon steel were performed on Gleeble 1500 simulator.The static and dynamic CCT graphs were obtained.The stress-strain curves were obtained under different stain rates and temperatures.Through the peak stress and the temperature variation curves,the start and finish temperature range of the phase transition was obtained.The results show that with increasing the cooling rate,the phase transition temperature decreased.The temperature of the transition from austenite to ferrite increased for the dynamic CCT curves compared with the static CCT curves.The austenite phase ,austenite-ferrite phase and ferrite phase temperature for the steel were above 1 041,1 041-955 and below 955 ℃,respectively.The mathematical model of deformation resistance was established for the above three phase regions.The flow stress increased with the deformation and strain rate increasing.