Abstract
The change rules of deformation parameters such as temperature, strain and strain rate at different zones of forgings are very complex in the forging process of high alloy chromium-cobalt gear steel, and the deformation parameters have great influence on grain sizes. In this paper, recrystallization model for the steel was established with the material characteristic parameters obtained from the Gleeble isothermal compression test, influencing factors were analyzed based on the model. The results indicate that recrystallization grain size increases with increasing temperature and decreasing strain and strain rate, and the effect of temperature is more obvious than the other two. The average grain sizes are between 27.7μm∼40μm at 1040°C of forging temperature, grain size degree 6∼6.5, meeting the product requirements.
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References
Niels Hansen, “Hall–Petch Relation and Boundary Strengthening,” Scripta Materialia, 10 (51) (2004), 801–806.
P. Sharifi et al., “Predicting the Flow Stress of High Pressure Die Cast Magnesium Alloys” Journal of Alloys and Compounds, 3(605) (2014), 237–243.
S.Q. Huang, “Microstructure Evolution and Digital Characterization of Ultra High-strength Steel in the Whole Forging Process” (PH.D. thesis, Central South University, 2013).
F. Montheillet, O. Lurdos, and G. Damamme, “A grain scale approach for modeling steady-state discontinuous dynamic recrystallization,” Acta Materials, (57) (2009), 1602–1612.
T. E. Howson, and H. E. Delgado, “Computer Modeling Metal Flow in Forging,” JOM, 41(2) (1989), 32–34.
K.S. Park, C.J. VanTyne, and Y.H. Moon, “Process Analysis of Multistage Forging by Using Finite Element Method,” Journal of Materials Processing Tech, 187 (2006), 586–590.
C.X. Yueet al., “Finite Element Simulation of Austenite Grain Growth for GCrl5 Steel,” Materials for Mechanical Engineering, 12(32) (2008), 88–90.
Z.D. Quet al., “The Model of Microstructure Evolution in Hot Forming Based on Second-Development of DEFORM3D,” Journal of Plasticity Engineering, 7(12) (2005), 40–43.
F. Chen, “Cellular Automata Simulation of Microstructure Evolution in Thermal Forging Discontinuous Deformation Process” (PH.D. thesis, Shanghai Jiaotong University, 2013).
B.X. Wang et al., “Research on Dynamic Recrystallization Behavior of New Mn-Cr Gear Steel”, Iron and Steel, 39(9) (2004), 54–57.
J. Caoet al., “Analysis on Dynamic Recrystallization Behavior of Bainitic Non-Quenched and Tempered Steel for Fasteners,” Journal of Iron and Steel Research, 24(10) (2012), 39–42.
G. Liuet al., “Hot Compression Recrystallization Behaviors of Low Carbon CrNiMo Carburized Bearing Steel,” Journal of Iron and Steel Research, 25(9) (2013), 30–37.
S.B. Yin et al., “Effect of Hot Deformation Parameters on Phase Transformation in Austenite Non-Recrystallization Region of Niobium Steel,” Iron and Steel, 43(2) (2008), 81–85.
E.J. Palmiere, C.I. Garcia, and A.J. Deardo, “Compositional and Microstructural Changes Which Attend Reheating and Grain Coarsening in Steels Containing Niobium,” Metallurgical and materials transactions A, 25(A) (1994), 277–286.
P.A. Manoharet al., “Grain Growth Prediction in Microalloyed Steel,” ISIJ International, 36(2) (1996), 194–200.
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© 2016 TMS (The Minerals, Metals & Materials Society)
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Hai-yan, T., Mao-sheng, Y., Wen-jia, M., Jing-she, L. (2016). Evolution Law of Grain Size of High Alloy Gear Steel in Hot Deformation. In: TMS 2016 145th Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48254-5_67
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DOI: https://doi.org/10.1007/978-3-319-48254-5_67
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48624-6
Online ISBN: 978-3-319-48254-5
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