Premium
Austenite grain in the process of thermomechanical treatment
Author(s) -
Kaspar Radko,
Pawelski Oskar
Publication year - 1986
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198600754
Subject(s) - recrystallization (geology) , metallurgy , austenite , dynamic recrystallization , materials science , microstructure , grain growth , hot working , geology , paleontology
The main object of thermomechanical processing is refining the final transformed microstructure. This requires an aimed evolution of the size and shape of the austenitic grain structure during the whole process. The control of three microstructural features is necessary: a) grain coarsening during reheating and – in some cases – after recrystallization, b) grain refinement by repeated dynamic and/or static recrystallization, and c) grain refinement due to grain flattening by deformation without recrystallization. There are significant effects of microalloying additions on all these processes in the austenite. In this paper the results of study of the essentials of austenite structure development are presented, putting the main emphasis on the variation of processing variables rather than on changes of chemical composition.