비조질 중탄소강의 정적 및 준동적 재결정에 관한 연구

초록

The static and metadynamic recrystallization of non-heat treated medium carbon steel(Fe - 0.45wt.%C - 0.6wt.%Si - 1.2wt.%Mn - 0.12wt.%Cr - 0.1wt.%V - 0.017wt%.Ti) were studied by the torsion test in the strain rate range of 0.05 - 5 sec-1, and in the temperature range of 900 - 1100 ℃. Interrupted deformation was performed with 2 pass deformation in the pass strain range of 0.25εp(peak strain) and 2εp, and in the interpass time range of 0.5 - 100 sec. The dependence of pass strain(εi), strain rate( ), temperature(T), and interpass time(ti) on static recrystallization (SRX) and metadynamic recrystallization (MDRX) were predicted from the modified Avrami's equations respectively. Comparison of the softening kinetics between SRX and MDRX was indicated that the rate of MDRX was more rapid than that of SRX under the same deformation variables.