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Volume 26 Issue 11
Nov.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(11): 1385-1395
Yang Li, Peng-fei Du, Zhou-hua Jiang, Cong-lin Yao, Lu Bai, Qi Wang, Guang Xu, Chang-yong Chen, Lei Zhang,  and Hua-bing Li, Effects of TiC on the microstructure and formation of acicular ferrite in ferritic stainless steel, Int. J. Miner. Metall. Mater., 26(2019), No. 11, pp. 1385-1395. https://doi.org/10.1007/s12613-019-1845-2
Cite this article as:
Yang Li, Peng-fei Du, Zhou-hua Jiang, Cong-lin Yao, Lu Bai, Qi Wang, Guang Xu, Chang-yong Chen, Lei Zhang,  and Hua-bing Li, Effects of TiC on the microstructure and formation of acicular ferrite in ferritic stainless steel, Int. J. Miner. Metall. Mater., 26(2019), No. 11, pp. 1385-1395. https://doi.org/10.1007/s12613-019-1845-2
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研究论文

Effects of TiC on the microstructure and formation of acicular ferrite in ferritic stainless steel

  • School of Metallurgy, Northeasten University, Shenyang 110819, China

  • 通讯作者:

    Hua-bing Li    E-mail: lihb@smm.neu.edu.cn

  • The formation mechanism of acicular ferrite and its microstructural characteristics in 430 ferrite stainless steel with TiC additions were studied by theory and experiment. Using an "edge-to-edge matching" model, a 5.25 mismatch between TiC (FCC structure) and ferritic stainless steel (BCC structure) was identified, which met the mismatch requirement for the heterogeneous nucleation of 430 ferritic stainless steel. TiC was found to be an effective nucleation site for the formation of acicular ferrite in a smelting experiment, as analyzed by metallographic examination, Image-Pro Plus 6.0 analysis software, and SEM-EDS. Furthermore, small inclusions in the size of 2-4 μm increased the probability of acicular ferrite nucleation, and the secondary acicular ferrite would grow sympathetically from the initial acicular ferrite to produce multi-dimensional acicular ferrites. Moreover, the addition of TiC can increase the average microstrain and dislocation density of 430 ferrite stainless steel, as calculated by Williamson-Hall (WH) method, which could play some role in strengthening the dislocation.
    • Research Article

    Effects of TiC on the microstructure and formation of acicular ferrite in ferritic stainless steel

    + Author Affiliations
      Abstract
    • The formation mechanism of acicular ferrite and its microstructural characteristics in 430 ferrite stainless steel with TiC additions were studied by theory and experiment. Using an "edge-to-edge matching" model, a 5.25 mismatch between TiC (FCC structure) and ferritic stainless steel (BCC structure) was identified, which met the mismatch requirement for the heterogeneous nucleation of 430 ferritic stainless steel. TiC was found to be an effective nucleation site for the formation of acicular ferrite in a smelting experiment, as analyzed by metallographic examination, Image-Pro Plus 6.0 analysis software, and SEM-EDS. Furthermore, small inclusions in the size of 2-4 μm increased the probability of acicular ferrite nucleation, and the secondary acicular ferrite would grow sympathetically from the initial acicular ferrite to produce multi-dimensional acicular ferrites. Moreover, the addition of TiC can increase the average microstrain and dislocation density of 430 ferrite stainless steel, as calculated by Williamson-Hall (WH) method, which could play some role in strengthening the dislocation.
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