THERMODYNAMIC STUDY OF BAINITIC TRANSFORMATION IN Fe-C ALLOYS

Acta Metall Sin

1989, Vol. 25

Issue (4): 23-29 DOI:

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THERMODYNAMIC STUDY OF BAINITIC TRANSFORMATION IN Fe-C ALLOYS

WANG Shidao;YU Degang Lanzhou Railway Institute Shanghai Jiaotong University

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WANG Shidao;YU Degang Lanzhou Railway Institute Shanghai Jiaotong University. THERMODYNAMIC STUDY OF BAINITIC TRANSFORMATION IN Fe-C ALLOYS. Acta Metall Sin, 1989, 25(4): 23-29.

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Abstract The growth of bainitic ferrite is a couple process of the shear trans-formation of Fe atoms and the diffusion of C atoms. The diffusion growth of fer-rite is impossible when the temperature is below 400℃, and the paraequilibriumshear growth may occur at the temperature below 550℃. This paraequilibrium sheargrowth model explains the overlap of the bainites created from two growth mecha-nisms at 400--550℃.

Key words: Fe-C alloys bainite thermodynamics

Received: 18 April 1989

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