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| Thermodynamic Calculation and Experimental Measurement of δ-Ferrite Amount in P92 Heat-Resistant Steel |
| SHI Ru-xing,LIU Zheng-dong,ZHANG Cai-ming |
| Institute for Structural Materials, Central Iron and Steel Research Institute, Beijing 100081， China |
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Abstract The effect of processing temperature on δ-ferrite amount in P92 steel was experimentally investigated. Results show that the amount of δ-ferrite decreases firstly and then increases after approaching its lower peak around 1050℃, within the temperature scope from 900℃ to 1200℃. With the help of the Thermo-Calc software, the pseudo-equilibrium phase diagrams of P92 steel were calculated. Its prediction on δ-ferrite evolution agrees well with aforementioned measurement. These pseudo-equilibrium phase diagrams can reasonably explain the experimental results.
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Received: 25 August 2010
Published: 17 November 2011
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2011, Vol. 46 
