Effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel

DAI Yong-juan; LI Hui; FENG Jie; MI Zhen-li; TANG Di

doi:10.13374/j.issn2095-9389.2016.s1.039

Volume 38 Issue S1

Jul. 2021

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Article Navigation > Chinese Journal of Engineering > 2016 > 38(S1): 238-242

DAI Yong-juan, LI Hui, FENG Jie, MI Zhen-li, TANG Di. Effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel[J]. Chinese Journal of Engineering, 2016, 38(S1): 238-242. doi: 10.13374/j.issn2095-9389.2016.s1.039

Citation:

DAI Yong-juan, LI Hui, FENG Jie, MI Zhen-li, TANG Di. Effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel[J]. Chinese Journal of Engineering, 2016, 38(S1): 238-242. doi: 10.13374/j.issn2095-9389.2016.s1.039

Citation:

DAI Yong-juan, LI Hui, FENG Jie, MI Zhen-li, TANG Di. Effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel[J]. Chinese Journal of Engineering, 2016, 38(S1): 238-242. doi: 10.13374/j.issn2095-9389.2016.s1.039

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Effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel

doi: 10.13374/j.issn2095-9389.2016.s1.039

1. College of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;
2. College of Engineering, Yantai Nanshan University, Yantai 265700, China;
3. National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2016-03-09
Available Online: 2021-07-29

Abstract

Abstract

The effect of annealing time and cooling methods on the microstructure and mechanical properties of Fe-28Mn-2.8Si-2.2Al-TWIP steel was studied by optical microscopy and electron backscatter diffraction technology. It is found that when the annealing time is 5,10 and 20 min,the austenite grains grow quickly. At the same time,annealing twins in the austenite grains get long and thick,the tensile strength and yield strength decrease,but the change in elongation is little. Compared with air cooling,water cooling is more advantageous for the TWIP steel to obtain good mechanical properties,and the cooling rate has a certain effect on the grain orientation.
- automobile steel,
- cooling,
- annealing time,
- microstructure,
- mechanical properties