Comparison of the annealing behaviour between cold and warm rolled ELC steels by thermoelectric power measurements

The variations of thermoelectric power (TEP) measurements during annealing of warm and cold rolled extra low carbon (ELC) steels were analysed. Where a prominent influence of recovery was detected in cold rolled steels during annealing, almost no variation of TEP due to both recovery and recrystallisation was observed during annealing of warm rolled steels. On the other hand, TEP measurements were proven to be a powerful technique to monitor dissolution of cementite and precipitation of aluminium nitrides. It was found that these two phenomena significantly affect TEP measurements and recrystallisation kinetics during annealing of warm rolled steels.