Metallurgy, Vol. 54 No. 3, 2015.
Original scientific paper
Effect of deformation on the continuous cooling transformation (CCT) diagram of steel 32CRB4
R. Kawulok
; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
I. Schindler
; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
P. Kawulok
; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
S. Rusz
; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
P. Opěla
; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
Z. Solowski
; Třinecké železárny a.s., Czech Republic
K. M. Čmiel
; Třinecké železárny a.s., Czech Republic
Abstract
CCT and DCCT steel diagrams of the steel 32CrB4 were determined by the universal plastometer GLEEBLE 3 800 on the basis of dilatometric tests. Dilatometric analysis showed that compared to the diagram provided by the software QTSteel th e noses of individual curves are in fact shifted towards shorter times. Preceding deformation significantly affected the decay diagram of the investigated steel. Shorter times, which were available for recovery of the deformed structure during more rapid cooling, resulted in a significant shift of the curves in the DCCT diagram towards shorter times. At low cooling rates the effect of deformation was practically negligible, since recrystallization took place between the deformation and beginning of the phase transformation.
Keywords
steel 32CrB4; deformation; cooling; dilatometric tests; CCT and DCCT diagrams
Hrčak ID:
131600
URI
Publication date:
1.7.2015.
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