管丽, 刘雅政, 周乐育, et al. Effect of Cooling Rate on Structure Evolution of Hot Deformed Ferrite-Bainite Micro Alloying Steel[J]. Special Steel, 2007, 28(3): 35-37.
管丽, 刘雅政, 周乐育, et al. Effect of Cooling Rate on Structure Evolution of Hot Deformed Ferrite-Bainite Micro Alloying Steel[J]. Special Steel, 2007, 28(3): 35-37.DOI:
Ferrite-bainite(F+B)microalloying steel0.06C-1.08Si- 1.64Mn-0.30Mo-0.039Nb-0.01Ti has been developed; continuous cooling transformation(CCT)diagram of 50% deformed test steel at 900 ℃ and with cooling rate 0.5~40 ℃/s was obtained by Cleeble-1500 thermal simulator
and phase transformation structure of deformed austenite was analyzed. Results showed that the CCT diagram was composed of polygonal ferrite transformation region and bainite transformation region which were divided by metastable austenite region; as cooling rate was≤2 ℃/s
polygonal ferrite occurred in steel and as the cooling rate was ≥5 ℃/s
main structure in steel consisted of granular bainite and lath bainite.