scholarly journals Tailoring the Austenite Fraction of a Cu and Ni Containing Medium-Mn Steel via Warm Rolling

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1888
Author(s):  
Zigan Xu ◽  
Jiyao Li ◽  
Xiao Shen ◽  
Tarek Allam ◽  
Silvia Richter ◽  
...  

Developing medium-Mn steels (MMnS) demands a better understanding of the microstructure evolution during thermo-mechanical treatments (TMTs). This study demonstrates the relationship among processing, microstructure, and mechanical properties of a warm-rolled medium-Mn steel (MMnS) containing 1.5 wt. % Cu and 1.5 wt. % Ni. After short-time warm rolling (WR) in an intercritical temperature range, a significant quantity (40.6 vol.%) of austenite was reverted and retained after air cooling. The microstructure and tensile properties of the WR specimens were compared with two typical process routes, namely hot rolling+ cold rolling+ annealing+ tempering (CRAT) and warm rolling+ annealing+ tempering (WRAT). The WR specimen exhibited comparable tensile properties with the CRAT specimens (967 MPa yield strength, 1155 MPa tensile strength, 23% total elongation), with a remarkably shortened process route, which was derived from the dislocation accumulation and austenite reversion during rolling. The WR route stands out among the traditional CRAT and the extended WRAT routes for its excellent tensile properties and compact processing route.

2014 ◽  
Vol 1063 ◽  
pp. 3-6 ◽  
Author(s):  
Si Lian Chen ◽  
Yao Zong Bao ◽  
Han Dong ◽  
Wen Quan Cao

The austenisation and quenching behaviors of a medium-Mn steel with a chemical composition of C 0.14% and Mn 5.0% were presented in this paper. The heating and holding temperature varied from 500OC to 950OC was applied to find the austenization temperature. The holding time varied from 1-5minutes was used to choose the suitable austenisation time. Air cooling were applied to check the hardening capacity of the studied steel. It was found that the tensile strength is lower than 900Mpa and total elongation varied from 20-30% when the austenisation temperature is lower than 700OC. However, the tensile strength could be high up to 1600MPa and the total elongation about 12% when the austenisation temperature is higher than 700OC with air cooling. Based on the low austenisation temperature and the air hardening capacity, it was proposed that the studied medium-Mn steel could be used as the hot stamping steel in the car industry.


2019 ◽  
Author(s):  
Rajib Kalsar ◽  
Soheil Sanamar ◽  
Norbert Schell ◽  
H-G. Brokmeier ◽  
R. Saha ◽  
...  

2019 ◽  
Vol 165 ◽  
pp. 15-19 ◽  
Author(s):  
Yongjian Zhang ◽  
Weijun Hui ◽  
Jiaojiao Wang ◽  
Ming Lei ◽  
Xiaoli Zhao

2021 ◽  
Vol 174 ◽  
pp. 110992
Author(s):  
Aniruddha Dutta ◽  
Tak Min Park ◽  
Jae-Hoon Nam ◽  
Sang-In Lee ◽  
Byoungchul Hwang ◽  
...  

2017 ◽  
Vol 707 ◽  
pp. 501-510 ◽  
Author(s):  
Weijun Hui ◽  
Chengwei Shao ◽  
Yongjian Zhang ◽  
Xiaoli Zhao ◽  
Yuqing Weng

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