期刊
COMPUTATIONAL MATERIALS SCIENCE
卷 44, 期 2, 页码 316-321出版社
ELSEVIER
DOI: 10.1016/j.commatsci.2008.03.027
关键词
42CrMo steel; Double hit hot deformation; Static recrystallization; Softening fraction
资金
- 973 Program [2006CB705401]
- China Postdoctoral Science Foundation [20070410302]
- Postdoctoral Science Foundation of Central South University
- Key Laboratory of Modern Complex Equipment Design and Extreme Manufacturing (Central South University)
- Ministry of Education, China
In order to study the workability and optimize hot formation processing parameters for 42CrMo steel, the static recrystallization behaviors in 42CrMo steel were investigated by isothermal interrupted hot compression tests on Gleeble-1500 thermo-simulation machine. Compression tests were performed using double hit schedules at the temperatures from 850 degrees C to 1150 degrees C, strain rates from 0.01 s(-1) to 1 s(-1) and inter-stage delay time varying between 1 s and 100 s after the first stage. The kinetic equations have been proposed to predict the static recrystallization behaviors of hot deformed 42CrMo steel. Comparisons between the experimental and predicted results were carried out. Results show that the effects of deformation parameters, such as strain rate, deformation temperature and deformation degree, on the softening in multi-stage hot deformation are significant. The predicted results are in good agreement with the experimental ones, which indicates that the proposed kinetic equations can give an accurate estimate of the softening behaviors and microstructural evolutions for 42CrMo steel. (C) 2008 Elsevier B.V. All rights reserved.
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