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| Effect of two-step cooling process on mechanical properties of TRIP steel with high performance |
| M.L. Li1,2 ? H. Jiang1,2 ? Y.L. He1,2 ? L.B. Chen1,2 ? G.T. Zhang3 ? H. Wang1 ? X.G. Lu1,2 ? L. Li1,2 |
1 School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China
2 State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China
3 Pangang Group Research Institute, Panzhihua 617000, Sichuan, China |
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Abstract A novel two-step cooling experiment was established to simulate the slow cooling process of continuous annealing production line for transformation-induced plasticity (TRIP) steel. The microstructures and mechanical properties of TRIP steel soaked at 700 ��C for different time were investigated by tensile test, scanning electron microscopy, X-ray diffraction, and thermodynamic and kinetic calculation. It is shown that the steel soaked for 15 s exhibits the optimal product of strength and elongation (PSE > 30,000 MPa%) due to the transformation of austenite to proeutectoid ferrite, which delays the bainite transformation and improves the stability of retained austenite. In addition, the mechanical properties of TRIP steel soaked over 30 s are much lower, resulting from the precipitation of cementite, which decreases the stability of retained austenite and weakens the TRIP effect.
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Received: 21 March 2017
Published: 15 October 2018
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| [1] |
Zackay V F, Parker E R, Fahr D, et al.The enhancement of ductility in high-strength steels[J].ASM Trans Quart, 1967, 60(2):252-259
|
| [2] |
Yin H, Zhao Z, Zhao A, et al.Effect of Annealing Process on Microstructure and Mechanical Property of 1100 MPa Grade TRIP Steel[J].Journal of Iron and Steel Research, International, 2015, 22(7):622-629
|
| [3] |
Xu Y, Hou X, Wang Y, et al.Effects of rapid heating continuous annealing on microstructure and mechanical properties of ultra high-strength trip-aided steel[J].Acta Metallurgica Sinica(China), 2012, 48(2):176-182
|
| [4] |
���ٸ�, ������.�������������˻���ȴ����������������˻����[J].��������, 2007, 5:13-17
|
| [5] |
������,��˪,���ʶ�,����. ����������˫��ֵ��������ռ���֯��������[J]. ���ּ���,2008,(04):1-8+34.Dyson D J, Holmes B. Effect of alloying additions on the lattice parameter of austenite[J]. J Iron Steel Inst, 1970, 208(5): 469-474.Kirkaldy J S. Prediction of alloy hardenability from thermodynamic and kinetic data[J]. Metallurgical Transactions, 1973, 4(10): 2327-2333.Saunders N, Guo Z, Li X, et al. The calculation of TTT and CCT diagrams for general steels[J]. JMatPro Software Literature, 2004.
|
| [9] |
Standard A. E112: Standard Test Methods for Determining Average Grain Size, West Conshocken, 1996.
|
| [1] |
Emna Ben Fredj Hadi Ghasemi Nanesa Mohammad Jahazi Jean-Benoit Morin. Influence of initial microstructure and grain size on transformation of bainite to austenite in large size forgings[J]. , 2018, (5): 554-562. |
| [2] |
Guo-chao Li ? Xu Cheng ? Xiang-jun Tian. Effects of annealing temperature and cooling rate on microstructures of a novel titanium alloy Ti�C6Al�C2V�C1.5Mo�C0.5Zr�C0.3Si manufactured by laser additive manufacturing[J]. , 2018, 25(4): 442-452. |
| [3] |
Hao-ran Cui ? Jian-ping Lai ? Qing-lin Pan ? Xiang-dong Wang. Effect of N and Zr on as-cast microstructure and properties after annealing of a high-speed steel[J]. , 2018, 25(4): 460-468. |
| [4] |
Jin-ru Luo Xiao Song Mao-yin Wang. Effects of different types of twinning on microstructure and mechanical properties of a strongly textured TA2 commercially pure titanium alloy subjected to rolling at ambient and cryogenic temperatures[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2018, 25(3): 275-281. |
| [5] |
Chen Dong, �� Ai-min Zhao, �� Xi-tao Wang �� Qi-hang Pang �� Hui-bin Wu,. Microstructure and properties of 1100 MPa grade low-carbon hot-rolled steel by laser welding[J]. , 2018, 25(2): 228-234. |
| [6] |
Jian Gou. Zheng-jun Liu . Hua Jia. Effects of Nb on microstructure and wear resistance of Fe�CCr�CC�CB surfacing alloy[J]. , 2018, 25(2): 243-251. |
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2018, Vol. 25 
