Influence of recrystallization annealing conditions on the structure of high-strength low-alloy sheet steel

Babich, V. K.; Nesterenko, A. M.; Storozheva, L. M.; Kulichkov, V. I.

doi:10.1007/bf00717491

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“…As reported in [9,10], the phenomenon of pearlitecolony dissolution during the annealing of a low carbon titanium microalloyed steel after cold rolling [9] and low carbon vanadium microalloyed steel after severe plastic deformation [10] was observed. In these cases the microalloying elements cause an increase in the recrystallization temperature.…”

Section: Distribution Of Cementitesupporting

confidence: 60%

“…The main condition for the redistribution of cementite, as shown in [10], seems to be a high dislocation density in the heavily deformed former pearlite colonies that was estimated to be of the order of 10 16 m À2 . In case of plain low carbon steel [9,10] with low recrystallization temperature, these treatments did not lead to the disappearance of pearlite colonies. In this steel a recrystallization would slow down or even stop this process by significantly reducing the dislocation density.…”

Section: Distribution Of Cementitementioning

confidence: 93%

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Development of microstructure and texture of medium carbon steel during heavy warm deformation

et al. 2004

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The microstructure and texture development of a medium-carbon steel (0.36% C) during heavy warm deformation (HWD) was studied using scanning electron microscopy and electron back scattering diffraction. The spheroidization of pearlite is accelerated due to the HWD, which leads to the formation of completely spheroidized cementite already after the deformation and coiling at 873 K (600°C). The homogeneity of the cementite distribution depends on the cooling rate and the coiling temperature. The cooling rate of about 10 K/s (ferrite-pearlite prior to HWD) and deformation/coiling at 943-973 K (670-700°C) lead to a homogeneous cementite distribution with a cementite particle size of less than 1 lm. The ferrite softening can be attributed to continuous recrystallization. Even up to fairly high deformation/coiling temperatures of 983 K (710°C) the texture consists of typical deformation components. During the continuous recrystallization the amount of high angle grain boundaries can increase up to 70% with a ferrite grain size of 1-3 lm. An increase of the cooling rate up to 20 K/s (ferrite-pearlite-bainite prior to HWD) deteriorates the homogeneity of the cementite distribution and the softening of ferrite in the final microstructure.

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