Metall. Res. Technol.
Volume 118, Number 2, 2021
|Number of page(s)||11|
|Published online||15 March 2021|
Experimental investigation on static recrystallization behavior of a low carbon Nb–V–Ti microalloyed steel
School of Materials Science and Engineering, Dalian University of Technology,
116024, PR China
* e-mail: email@example.com
Accepted: 14 January 2021
The static recrystallization (SRX) behavior of a low carbon Nb–V–Ti microalloyed steel X70 was investigated by two-pass hot compression tests. The compression tests were carried out at deformation temperatures of 1000–1150 °C, strain rates of 0.01–5 s−1, pre-strains of 0.1–0.2 and interval times of 1–50 s. The effects of deformation parameters on SRX behavior were analyzed. The experimental results showed that deformation temperature, pre-strain and strain rate had significant influence on SRX fraction, while initial grain size had a smaller impact. The effects of deformation parameters on SRX microstructure were discussed, and the microstructure evolution process was analyzed. Higher deformation temperature, strain rate and pre-strain lead to larger SRX fraction. The kinetics and recrystallized grain size models for SRX of X70 pipeline steel were developed. Comparison between the predicted results and the experimental ones indicated that the established equations could give a reasonable description for SRX behavior of X70 pipeline steel.
Key words: static recrystallization / Nb–V–Ti microalloyed steel / hot compression / microstructure evolution
© EDP Sciences, 2021
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