Hot Deformation Behavior of P92 Steel Used for Ultra-Super-Critical Power Plants
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- 作者：Ru-xing ; SHI ; ; shiruxing@126.com ; Zheng-dong ; LIU[Author vitae]
- 关键词：P92 steel ; dynamic recovery ; recrystallization ; flow stress ; Zener-Hollomon parameter
- 刊名：Journal of Iron and Steel Research, International
- 出版年：2011
- 出版时间：July 2011
- 年：2011
- 卷：18
- 期：7
- 页码：53-58
- 全文大小：912 K
文摘
Hot compression tests of P92 steel at temperatures in the range of 1173 to 1523 K and at strain rates in the range of 0.1 to 10 s? 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 recrystallization may occur, was determined to have 4.61 ¡Á 1018. 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 ¦ÒP = 17.17ln? + .