Influence of Second Phase Particles on Recrystallisation of Cold-Rolled Low Carbon Microalloyed Steels during Isothermal Annealing

Abstract

The recrystallisation behaviour of two cold-rolled low carbon microalloyed steels with different Ti content was investigated by thermoelectric power (TEP) measurements and metallography. It was shown that recrystallisation was more sluggish in the higher Ti grade steel as compare with traditional ELC and LC steels. The existence of Ti in solid solution together with the pinning effect of Nb-, V- and Ti-rich particles are likely to be responsible for such behaviour. Metallographic etching with picral revealed that cementite act as preferential nucleation site for recrystallisation.

Global recrystallisation model of low carbon sheet steels with different cementite contents

“…This behaviour is closely related with the cementite precipitation process previously reported by the authors [18] and can be seen in Fig. 2.…”

Neural network analysis of the influence of processing on strength and ductility of automotive low carbon sheet steels

“…It is clear that this temperature affects enormously the evolution of such mechanical properties. This is a consequence of static recrystallisation process [10], which leads to an increase of ductility in detriment of strength ( Fig. 8).…”

Influence of Microalloying Elements on Recrystallization Texture of Warm-Rolled Interstitial Free Steels

“…It is also well established that the presence of microalloying elements in solid solution may retard the recrystallization by solute drag phenomena. 27) In this sense, because of the largest concentrations, IF-HS steel is more prone to present the most sluggish recrystallization kinetics. The delay in recrystallization kinetics shown by IFTiNb steel might be due to the combined effect of the precipitates MC-type (such as C0.88Nb) and Fe(Ti+Nb)P precipitates, and to a lesser extent, by solute drag phenomena.…”