Effect of Ti Addition on the Precipitation Mechanism and Precipitate Size in Nb-Microalloyed Steels

Jun Xing; Guohui Zhu; Baoqiao Wu; Hanlin Ding; Hongbo Pan

doi:10.3390/met12020245

Metals (Jan 2022)

Effect of Ti Addition on the Precipitation Mechanism and Precipitate Size in Nb-Microalloyed Steels

Jun Xing,
Guohui Zhu,
Baoqiao Wu,
Hanlin Ding,
Hongbo Pan

Affiliations

Jun Xing: School of Metallurgy Engineering, Anhui University of Technology, Ma’anshan 243000, China
Guohui Zhu: School of Metallurgy Engineering, Anhui University of Technology, Ma’anshan 243000, China
Baoqiao Wu: Masteel Branch, Academia Sinica, Baowu Group, Ma’anshan 243000, China
Hanlin Ding: School of Iron and Steel, Soochow University, Suzhou 215006, China
Hongbo Pan: School of Metallurgy Engineering, Anhui University of Technology, Ma’anshan 243000, China

DOI: https://doi.org/10.3390/met12020245
Journal volume & issue: Vol. 12, no. 2
p. 245

Abstract

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The effect of Ti microalloying on the precipitation of NbC particles in Nb-microalloyed and Nb-Ti-microalloyed steels was investigated by scanning transmission electron microscopy. The experimental results illustrate that NbC precipitates tend to be formed via a conventional “nucleation and growth” mechanism in Ti-free steel, while the particles would be precipitated as a complex form of TiN cuboid core and NbC hemispherical cap in Ti-Nb-microalloyed steel with 0.009 wt.% Ti and 0.0046 wt.% N. Ti microalloying contributed to the refinement of the precipitate size, and an enhancement of the volume fraction of NbC particles was also found based on the experimental observations.

Published in Metals

ISSN: 2075-4701 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.mdpi.com/journal/metals

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