The chemical driving forces for the phase transformation from austenite in three different car-bon-depleted regions into ferrite with the identical composition have been derived respectively.The starting temperature of bainitic transformation,B_s,has also been calculated accordingto the shearing mechanism of bainitic transformation in carbon-depleted regions of austenite.The maximum driving forces for banitic transformation at B_s in both 3% Cr and the CrMosteels were obtained.It was shown that the proposed shearing mechanism of the bainitic trans-formation is thermodynamically possible.
展开▼
