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| KINETICS OF AUSTENITIZATION DURING INTERCRITICAL ANNEALING OF LOW CARBON LOW ALLOY STEELS |
| LEI Tingquan;PAN Jie Harbin Institute of Technology |
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Cite this article:
LEI Tingquan;PAN Jie Harbin Institute of Technology. KINETICS OF AUSTENITIZATION DURING INTERCRITICAL ANNEALING OF LOW CARBON LOW ALLOY STEELS. Acta Metall Sin, 1985, 21(5): 20-30.
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Abstract The kinetics of austenitization during intercritical annealing at temperaturesbetween 740 and 820℃ has been studied on the low carbon low alloy steels witha prior microstructure of ferrite-pearlite.In austenitization process,two stages,namely,nucleation and rapid growth of austenite,and slow growth of austeniteinto ferrite are presented.The austenite nucleates mainly along the ferrite-pearliteinterfaces at 740℃,but part of the austenite nuclei forms along the ferrite-ce-mentite boundaries in pearlite colony at 780 and 820℃.The kinetics of the formerstage examined obeys the Cahn's theory of grain boundary nucleation transforma-tion.An attempt is made to discuss the kinetics of the later stage by the theoryof grain growth on recrystallization.
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Received: 18 May 1985
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