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| Dynamic Recrystallization Behavior of Medium Carbon Cr-Ni-Mo-Nb Steel during Hot Deformation |
| Shi-li ZHU1,2,Hua-zhen CAO1,Jian-song YE2,Wen-hao HU2,Guo-qu ZHENG1 |
1. School of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou 310032, Zhejiang,China
2. Technology Center, Hangzhou Iron and Steel Group Company, Hangzhou 310022, Zhejiang, China |
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Abstract Hot compression deformation behaviors of medium carbon Cr-Ni-Mo-Nb steel were investigated at deformation temperatures ranging from 1223 to 1423 K and strain rates of 0.1, 1 and 5 s-1. Dynamic recovery (DRV) and dynamic recrystallization (DRX) were observed during the hot compression deformation. For all of the samples, DRX occurred at deformation temperatures above 1323 K at different strain rates, while below 1223 K, no DRX was observed. The activation energy of the tested steel was determined as 386.06 kJ/mol. The ratio of critical stress to peak stress and the ratio of critical strain to peak strain were 0.835 and 0.37, respectively. Kinetic equations interpreting the DRX behavior of the tested steel were proposed, and the corresponding parameters including the volume fraction and the average grain size were determined. Moreover, the microstructures induced under different deformation conditions were analyzed.
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Received: 05 November 2013
Published: 06 March 2015
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| Fund:Zhejiang Province Priority Subjects Open Foundation |
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Corresponding Authors:
Shili Zhu
E-mail: zhushili@hzsteel.com
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2015, Vol. 22 
