Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (1): 22-28.

• Research paper • Previous Articles     Next Articles

THERMODYNAMIC STUDY OF BAINITIC TRANSFORMATION IN Fe-C ALLOYS

WANG Shidao Lanzhou Rialway Institute,Lanzhou,ChinaYU Degang Shanghai Jiaotong University,Shanghai,China Correspondent:WANG Shidao Department of Mechanics,Lanzhou Railway Institute,Lanzhou,China   

  • Received:1990-02-25 Revised:1990-02-25 Online:1990-02-25 Published:2009-10-10

Abstract: The growth of bainitic ferrite is a couple process of the shear transformation of Fe atoms with the diffusion of C atoms.The diffusion growth of the ferrite is impossible when the tempera- ture is below 400℃,and the paraequilibrium shear growth may occur at the temperature be- low 550℃.This paraequilibrium shear growth model explains the overlap of the bainites created from two growth mechanisms at 400—550℃.

Key words: Fe-C alloys, bainite, thermodynamics