Premium
Structure forming processes during hot deformation of a C‐Mn‐V‐N steel
Author(s) -
Adamczyk Jan,
Carsi Manuel,
Kozik Roman,
Wusatowski Roman
Publication year - 1995
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199501129
Subject(s) - softening , dynamic recrystallization , materials science , recrystallization (geology) , metallurgy , carbon steel , activation energy , flow stress , atmospheric temperature range , strain rate , hot working , thermodynamics , composite material , microstructure , chemistry , paleontology , corrosion , organic chemistry , biology , physics
Medium carbon V‐N treated steel grade applied for long products and small drop forged parts investigated in a state of incomplete solution of V(C,N) precipitates. Activation energy changes investigated in the 850–1200°C temperature range and 0.6–30 s −1 strain rate range is revealed to be temperature dependent. Calculated for σ p flow stress value this energy in some cases expresses a combination of various processes. It is found that DRX starts well below ∊ p . Softening during a short interpass time is caused by dynamic recrystallization DRX during forming and is followed by metadynamic recrystallization MDRX and static recrystallization SRX. At longer interpass times softening progress is hindered by precipitation.