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Simulation of austenitic microstructure in rod and wire rolling of quenched and tempered steel grades
Author(s) -
Lehnert Wolfgang,
Cuong Nguyen Duc,
Wehage Harald
Publication year - 1995
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199501157
Subject(s) - austenite , recrystallization (geology) , materials science , metallurgy , microstructure , rod , alloy , dynamic recrystallization , hot working , medicine , paleontology , alternative medicine , pathology , biology
The determination of the microstructural and forming parameters of rods and wire from low to medium‐alloy quenched and tempered as well as spring steel grades is a prerequisite for the mathematical modelling and optimization of the technology on the basis of process and material criteria. Using the boundary, heat balance and finite difference methods as well as visioplastic investigations, the most important forming parameters were determined in high‐speed rolling. The rolling of such steel grades allowed to determine the material constants for the dynamic and static equations of recrystallization. Due to the inhibitive effect of the alloying elements (Mo, V) the investigated steel grades display a comparatively pronounced recrystallization inertia. Accordingly, the austenitic post‐recrystallization grain size is very fine and relatively independent of the temperature. Temperature control during rod and wire rolling allows to influence and adjust the austenitic microstructure prior to phase transformation.