Abstract
Hot compression tests of P92 steel at temperatures in the range of 1173 to 1 523 K and at strain rates in the range of 0. 1 to 10 s−1 were carried out on a Gleeble-3500 thermal-mechanical simulator, and the corresponding flow curves were measured. The results showed that the flow stress and the peak strain increase with decreasing deformation temperature and increasing strain rate. The critical Z value, below which the complete dynamic recrystalliza-tion may occur, was determined to have 4. 61 × 10ls. The hot deformation activation energy of the steel was about 437 kj/mol. The hot deformation equation and the microstructure diagram of P92 steel were obtained. For the convenience of the practical application, the empirical equation for the peak stress can be described as. \({\sigma _P}\, = \,17.\,17\,\ln \,\mathop \varepsilon \limits^. \, + \,\frac{{902\,499}}{T}\, - \,524.\,1.\)
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Foundation Item: Item Sponsored by National Science and Technology Support Plan of China (2007BAE51B02)
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Shi, Rx., Liu, Zd. Hot Deformation Behavior of P92 Steel Used for Ultra-Super-Critical Power Plants. J. Iron Steel Res. Int. 18, 53–58 (2011). https://doi.org/10.1016/S1006-706X(11)60090-3
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DOI: https://doi.org/10.1016/S1006-706X(11)60090-3