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Effect of micro‐alloying titanium on the dynamic recrystallization behaviour of steels
Author(s) -
Weiyong He,
Guozhong Gao,
Jizhi Chen
Publication year - 1988
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198801627
Subject(s) - recrystallization (geology) , dynamic recrystallization , titanium , metallurgy , austenite , materials science , chemistry , analytical chemistry (journal) , hot working , microstructure , geology , paleontology , chromatography
The effect of titanium addition on the dynamic recrystallization behaviour of steels has been investigated. Constant strain rate tension tests were conducted in vacuum in the temperature range from 925 to 1225°C. Dynamic recrystallization‐time‐temperature (RTT) curves were developed from the flow curves at ε̇ = 1 × 10 −2 s −1 . The results of the different steels with and without Ti indicate that the onsets of dynamic recrystallization in all the steels are earlier at higher temperatures than at lower temperatures and the addition of titanium may shift the RTT curve of the C–Mn–Si steel towards the right, i.e. retard dynamic recrystallization. The retarding effect of Ti becomes more intensive at temperatures below about 1075°C where a transition of the RTT relationship occurs. Microstructural examinations show that titanium dissolved in austenite can retard the dynamic recrystallization and the precipitation of TiC produces a more intensive retarding effect.