Precipitation behavior of ultra-pure ferritic stainless steel during hot deformation

被引：2
|
作者：
Gao F. [1 ]
Liu Z.-Y. [2 ]
Yu F.-X. [1 ]
机构：
[1] School of Materials & Metallurgy, Northeastern University, Shenyang
[2] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang
来源：
Gao, Fei (gaofei181@aliyun.com) | 2016年 / Northeast University卷 / 37期
关键词：
Ferritic stainless steel; Hot deformation; Precipitation behavior; Thermodynamic calculation; Transmission electron microscopy;
D O I：
10.3969/j.issn.1005-3026.2016.01.010
中图分类号：
学科分类号：
摘要：
The precipitation behavior of an ultra-pure medium-chromium ferritic stainless steel with addition of Ti and V during hot deformation was studied using a thermomechanical simulator and pilot rolling mill. The characteristic of precipitates was investigated using thermodynamic calculation and transmission electron microscopy. The results showed that TiC is primary precipitate formed during hot deformation, in agreement with the thermodynamic calculation. The characteristic of these precipitates is closely dependent on deformation temperature. The TiC formed during hot deformation at relatively low temperature is finer in size and denser in dispersion than that at high temperature. This can be explained by a combination of the slower diffusion rate associated with the lower deformation temperature which is unfavorable to precipitate growth, and increasing lattice defects due to lower deformation temperature which can generate more nucleation sites for the strain-induced precipitates. This precipitation behavior during hot deformation is confirmed by the pilot rolling experiments. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：44 / 48
页数：4
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