Journal of Shanghai Jiaotong University ›› 2015, Vol. 49 ›› Issue (01): 67-73.

• Metallography and Metallurgical Technology • Previous Articles     Next Articles

Microstructure Simulation of Q550D Ultra Low Carbon Bainite Steel

DONG Hongbo,YU Xinping,ZHANG Wei   

  1. (School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China)
  • Received:2014-04-14

Abstract:

Abstract: The experimental data obtained by hot compression experiment were used to establish a Q550D low carbon bainite steel dynamic recrystallization model and a cellular automata model. The microstructure evolution on the hot deformation process was simulated by using DEFORM3D finite element software. The simulation results show that the strain rate at a temperature of 1 150 °C for the 0.05 s-1 sample in the process of hot deformation microstructure have dynamic recrystallization and the grain size is refined. At a temperature of 1 050 °C when the strain rate is increased, the dynamic recrystallization austenitic grain size decreases. The simulation results agrees with the experimental results.

Key words:  Q550D steel, dynamic recrystallization, cellular automaton, microstructure

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