|
|
|
| Partitioning of nitrogen atoms and its effect on retained austenite content in an ultra-low-carbon Cr–Mn–N stainless steel |
| Zhe Zhu1, Wan-tang Fu1, Rong-bin Li2, Qi-wei Chen1, Ze-an Zhou1, Zhen-hua Wang1, Jia-qing Liu1, Shu-hua Sun1,3 |
1 State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China
2 Shanghai Engineering Research Center of Hot Manufacturing, Shanghai Dianji University, Shanghai 201306, China
3 School of Science, Yanshan University, Qinhuangdao 066004, Hebei, China |
|
|
|
|
Abstract The partitioning of nitrogen atoms and its effect on the retained austenite content (RAC) during quenching and partitioning (Q&P) process were investigated by dilatometry, X-ray diffraction, and field emission transmission electron microscopy with energy-dispersive spectrometer mapping in a 00Cr13Mn8N steel. Nitrogen partitioning by diffusion of N atoms from martensite to austenite occurred at 400 °C after quenching. N atoms are enriched in austenite after partitioning, and the stability of these N-rich austenite is improved and retained at room temperature during subsequent cooling. The different quenching temperatures (QTs) result in different phase fractions after partitioning. With the increase in QT, RAC first increases and then decreases, and the maximum RAC is 28.5 vol.% after quenching at 80 °C. A mathematical model was developed to rapidly and accurately characterize the phase fraction in Q&P process based on the relative length change of the samples partitioned after quenching at different QTs.
|
|
Received: 24 April 2020
Published: 25 August 2021
|
|
|
|
| Cite this article: |
|
Zhe Zhu,Wan-tang Fu,Rong-bin Li, et al. Partitioning of nitrogen atoms and its effect on retained austenite content in an ultra-low-carbon Cr–Mn–N stainless steel[J]. Journal of Iron and Steel Research International, 2021, 28(8): 1030-1036.
|
|
|
|
| [1] |
SUN Rong-min, LI Guo-yang, WANG Hui, WANG Cun-yu, WANG Yu-hui, CAO Wen-quan. Microstructure and properties of Fe-Mn-C medium-Mn steel processed by ART-annealing[J]. Iron and Steel, 2021, 56(6): 82-88. |
| [2] |
DENG Jie, SONG Xin-li, SUN Xin-jun, JIA Juan, LIANG Xiao-kai, FAN Li-xia. Quenching and partitioning microstructure and mechanical properties of medium manganese steel bearing titanium[J]. Iron and Steel, 2021, 56(6): 103-111. |
| [3] |
LEI Zhiguo1,2，WANG Cunyu2，ZHOU Fengluan2，CAO Wenquan2，WANG Hang1. Effect of cryogenic treatment on microstructure and properties of mediummanganese steel treated by ARTannealing[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2021, 33(4): 330-335. |
| [4] |
CHEN Guang-hui, XU Guang, HU Hai-jiang, LIU Man, CHEN Xin. Controlling mechanism of retained austenite in a 1.6 GPa grade medium-carbon high-strength bainitic steel[J]. Iron and Steel, 2021, 56(2): 110-116. |
| [5] |
ZHENG Hua1,2,HU Feng1,KE Rui1,2,WU Kaiming1,3. Effect of intercritical heat treatment on microstructures and properties of medium carbon Q&P steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2021, 33(1): 46-49. |
| [6] |
TIAN Ya-qiang1,BI Wen-qiang1,PAN Hong-bo2,LI Hong-bin1,ZHENG Xiao-ping1,CHEN Lian-sheng1. Effect of carbide evolution on Lüders behavior of cold rolled ART 0.1C-7Mn steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(6): 505-511. |
|
|
|
|
2021, Vol. 28 
