| Issue |
MATEC Web Conf.
Volume 67, 2016
International Symposium on Materials Application and Engineering (SMAE 2016)
|
|
|---|---|---|
| Article Number | 05005 | |
| Number of page(s) | 5 | |
| Section | Chapter 5 Metallurgical Engineering | |
| DOI | https://doi.org/10.1051/matecconf/20166705005 | |
| Published online | 29 July 2016 | |
Quantitative Analysis on Carbide Precipitation in V-Ti Microalloyed TRIP Steel Containing Aluminum
School of Materials Science and Engineering, Shanghai University, 149 Yanchang Road Shanghai, China
a fushiyu2012@163.com
b ylhe@staff.shu.edu.cn
* Corresponding author: ylhe@staff.shu.edu.cn
Introducing fine precipitates is an important way to enhance the properties of transformation-induced plasticity (TRIP) steels. In present work, two V-Ti microalloyed TRIP steels containing aluminum with different content were compared. The average size, size distribution and numbers of vanadium-titanium carbides in samples cold rolled, quenched after being held at 800°C and quenched after intercritical annealing at 800°C and being held at bainitic isothermal transformation temperature of 400°C were investigated by using the technique of carbon extraction replica, twin jet chemical polishing thinning and transmission electron microscopy. The carbides were identified to be (Ti,V)C precipitates in steel A and VC in steel B respectively, precipitated mainly from ferrites grains. The average equivalent radius was 3~6nm. Comparison of the experimental results in A and B steel revealed low carbon diffusion rate caused by aluminum inhibited the coarsening of vanadium-titanium carbides. The experimental results also showed that VC carbides dissolution occurred during the intercritical annealing at 800°C.
© The Authors, published by EDP Sciences, 2016
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