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

被引：5
|
作者：
Xing, Jun [1 ,2 ]
Zhu, Guohui [1 ]
Wu, Baoqiao [2 ]
Ding, Hanlin [3 ]
Pan, Hongbo [1 ]
机构：
[1] Anhui Univ Technol, Sch Met Engn, Maanshan 243000, Peoples R China
[2] Acad Sinica, Masteel Branch, Baowu Grp, Maanshan 243000, Peoples R China
[3] Soochow Univ, Sch Iron & Steel, Suzhou 215006, Peoples R China
来源：
METALS | 2022年 / 12卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Ti-microalloying; precipitation mechanism; epitaxial growth; refinement of precipitates; AUSTENITE GRAIN; TOUGHNESS;
D O I：
10.3390/met12020245
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：11
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