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- W3150681908 abstract "The hot deformation behavior of a new heat resistant steel G115 designed for 650℃ ultra-supercritical(USC)power plants was experimentally studied.Hot compression test was carried out in the temperature range of 900-1200℃ and the strain rate range of 0.1-20s-1 by using Gleeble-3800 thermal-mechanical simulator,and the corresponding flow curves were obtained.Experimental results show that the flow stress increases with the decrease of deformation temperature and the increase of strain rate.The hot deformation activation energy of G115 steel was determined to be 494kJ/mol and the constitutive equation was also obtained.For convenience of the practical application,agood approximate equation was obtained for calculating the peak stress values of G115 steel under different deformation conditions.At the strain value of 0.9,natural logarithm of the critical Zener-Hollomon parameter Zc of G115 steel was determined to be in the scope of 49.67 and 50.65,above which there will be no dynamic recrystallization(DRX).And natural logarithm of the critical Zener-Hollomon parameter Zs of G115 steel was determined to be in the scopes of 45.58and 46.27,below which full DRX may occur.Then,the status diagram of dynamic microstructures of G115 steel was established.In addition,the strain rate sensitivity of G115steel is not constant during the test temperature range and it increases linearly from 900 to 1 200℃.Therefore,hot deformation at higher temperatures would obtain better workability." @default.
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- W3150681908 date "2013-01-01" @default.
- W3150681908 modified "2023-09-23" @default.
- W3150681908 title "Hot Deformation Behavior of a New 9% Cr Heat Resistant Steel G115" @default.
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