Study of the Kinetics of the Recrystallization of Cold-Rolled Low Carbon Steel

C. RODRÍGUEZ TORRES; F.H.SÁNCHEZ; A.C. GONZÁLEZ; F. ACTIS; R. HERRERA

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE

Año: 2002 vol. 33A p. 25 - 31

1073-5623

The suitability of the differential scanning calorimetry (DSC) technique for the quantitative study ofthe recrystallization process in cold-rolled steels is demonstrated, the recrystallization kinetics wasdescribed with a semiempirical model, and the transformation of a cold-rolled steel submitted to anindustrial-batch thermal cycle was appropriately simulated. It was found that the activation energyfor the recrystallization process depends on the heating-rate range, having values of 522 6 13 and259 6 12 kJ/mole for low and high heating rates, respectively. It was concluded that the smallestvalue corresponds to the recrystallization process alone, while the largest one contains an additionalcontribution from the aluminium nitride precipitation. It is also shown that the X-ray diffraction(XRD) line-width measurement is a useful complementary method to determine the temperatureregions where recovery and recrystallization occur.