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Changes in the austenite grain structure of microalloyed plate steels due to multiple hot deformation
Author(s) -
Kaspar Radko,
Distl Josef Siegfried,
Braag Klaus,
Klaar HansJoachim,
Zeislmair Ulrike
Publication year - 1987
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198700878
Subject(s) - recrystallization (geology) , austenite , metallurgy , materials science , microalloyed steel , deformation (meteorology) , dynamic recrystallization , grain size , hot working , composite material , microstructure , geology , paleontology
Simulating processes during roughing passes with the plane strain compression test, the influence of soaking temperature, initial grain size, deformation temperature and strain on the grain size of austenite after static recrystallization in the course of multiple deformation schedules is investigated for three microalloyed steels. The temperature region of a completely recrystallizing austenite was found to depend on the soaking temperature as a result of the change in the initial solute concentration. Temperature and strain of the last deformation/recrystallization steps in a roughing schedule control the intermediate austenite structure before the finishing passes without any significant effect of the initial grain size.