US 11,718,890 B2
High-strength and high-plasticity TWIP steel and preparation method thereof
Zhigang Wang, Ganzhou (CN); Lingqiang Zhong, Ganzhou (CN); Jieyun Ye, Ganzhou (CN); Hebin Wang, Ganzhou (CN); Weizhen Liu, Ganzhou (CN); Weihao Cai, Ganzhou (CN); and Xuwei Liu, Ganzhou (CN)
Assigned to Jiangxi University of Science and Technology, Ganzhou (CN); and Guorui Scientific Innovation Rare Earth Functional, Ganzhou (CN)
Filed by Jiangxi University of Science and Technology, Ganzhou (CN); and Guorui Scientific Innovation Rare Earth Functional Materials (Ganzhou) Co., Ltd, Ganzhou (CN)
Filed on Jan. 25, 2022, as Appl. No. 17/584,059.
Claims priority of application No. 202111202022.2 (CN), filed on Oct. 15, 2021.
Prior Publication US 2023/0120906 A1, Apr. 20, 2023
Int. Cl. C21D 9/46 (2006.01); C21D 8/02 (2006.01); C21D 6/00 (2006.01); C22C 38/04 (2006.01); C22C 38/00 (2006.01)
CPC C21D 9/46 (2013.01) [C21D 6/005 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preparing a TWIP steel, comprising
sequentially performing a cold rolling, a annealing treatment and a tempering treatment on a hot-rolled TWIP steel plate to obtain a TWIP steel,
wherein the TWIP steel comprises, in percentages by mass, 0.45%-0.75% of C, 16.20%-18.80% of Mn, 0.01%-0.05% of Ce, 0.02%-0.05% of Ba, not more than 0.0015% of O, not more than 0.003% of S, not more than 0.012% of P, and a balance of Fe.