Correlative analysis of interaction between recrystallization and precipitation during sub-critical annealing of cold-rolled low-carbon V and Ti–V bearing microalloyed steels

Ishwar Kapoor, Yongjun Lan, Arjan Rijkenberg, G. West, Zushu Li, Vit Janik

Research output: Contribution to journalArticle

Abstract

In this paper a new insight into fundamentals of static recrystallization, precipitation and their interaction during sub-critical annealing of three cold-rolled low-carbon microalloyed steel grades is presented. The grades under investigation are a base grade containing V as a microalloying element, a Ti + grade containing Ti as microalloying element added into the base grade, and a Ti + Mn + grade containing additional Mn added into the Ti + grade. The cold-rolled steels are sub-critically annealed inside a muffle furnace to simulate industrial continuous annealing parameters in order to investigate the interaction between recrystallization and precipitation across transient stages of the annealing process as a function of temperature and time. The Zener pinning of precipitates and solute drag force of Mn on the recrystallization process are calculated and compared with measured values obtained from experimental studies on the recrystallization kinetics. Results suggest that the recrystallization kinetics is fastest in the base grade. For the Ti + grade, fine (<15 nm) (Ti,V)(C/N) particles retard the recrystallization kinetics. For the Ti+ and Ti + Mn + grades, solute drag effect of Mn solute atoms for dwell time longer than 2 min at annealing temperature of 800 °C is negligible.

Original languageEnglish
Article number139381
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume785
Early online date15 Apr 2020
DOIs
Publication statusPublished - 21 May 2020

Keywords

  • Annealing
  • Recovery
  • Recrystallization
  • Microalloyed steel
  • Precipitation
  • Solute drag

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