Intercritical austenite stabilization of a Mn-Al TRIP steel

被引：0
|
作者：
Hu Z.-P. [1 ]
Xu Y.-B. [1 ]
Tan X.-D. [1 ]
机构：
[1] State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang
来源：
Xu, Yun-Bo (yunbo_xu@126.com) | 1600年 / Northeast University卷 / 37期
关键词：
Austenite reverse transformation; Austenite stabilization; Microstructure evolution; Mn-Al TRIP steel; Retained austenite;
D O I：
10.3969/j.issn.1005-3026.2016.02.007
中图分类号：
学科分类号：
摘要：
The intercritical austenite stabilization of Fe-0.2C-7Mn-3Al steel was investigated by MMS-200 thermo-mechanical test machine in the lab. The microstructure evolution and the partitioning process of C, Mn were characterized and analyzed by using SEM, EPMA, TEM and XRD. The results show that there are always 25%-30% bulky flattened ferrite at different intercritical annealing temperatures. As the intercritical annealing temperature increases, the retained austenite content in the microstructure increases first and then decreases, with the volume fraction being 10.2%-32.5%. The retained austenite and the intercritical ferrite are located with the lath shape, and the lath width is 200-300 nm. The optimized annealing temperature is 750 ℃. The synergistic effect of C, Mn and Al promotes the austenite stabilization during intercritical annealing, which causes the partitioning process with less time of the tested steel. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：179 / 183
页数：4
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