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| Hot Deformation Characteristics of 34CrMo4 SteelS |
| V Sajadi Far, M Ketabchi, M R Nourani |
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Abstract The 34CrMo4 (American grade: AISI 4130) steel is extensively utilized in the compressed natural gas cylinders. Due to the importance of thermo-mechanical processing in the production of these cylinders, the dynamic recrystallization (DRX) characteristics of 34CrMo4 steel were investigated in the present study. In the present work, the effect of hot deformation parameters such as temperature and strain rate on the dynamic restoration processes of a 34CrMo4 alloy was studied. Hot compression tests were performed in the temperature range of 900-1100?C and the strain rate range of 0.001-0.1 s??. Hot workability of this alloy has been analyzed by employing flow localization parameter. The flow curves observed are typical of occurrence of dynamic recrystallization and have exhibited single or multiple peak in flow stress before reaching steady state, depending on the temperature and strain rates. The flow stress decreases with the increase of deformation temperature and the decrease of strain rate. Finally the activation energy obtained in this research is 490.749kj/mol.
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Received: 10 September 2009
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2010, Vol. 17 
