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| Microstructure and Precipitate Phases of a New Low--activation 9--12%Cr F/M Steel for SCWR Fuel Cladding Material |
| HU Jiaxue 1, LIU Guoquan 1,2, HU Benfu1, XIAO Xiang1 |
1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083
2.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 |
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Cite this article:
HU Jiaxue LIU Guoquan HU Benfu XIAO Xiang. Microstructure and Precipitate Phases of a New Low--activation 9--12%Cr F/M Steel for SCWR Fuel Cladding Material. Chin J Mater Res, 2010, 24(3): 259-265.
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Abstract Thermo–Calc software was used to predict the microstructure of a new 9–12%Cr low–activation F/M steel designed for SCWR fuel cladding tube material. The microstructure of the experimental steel after quenching–and–tempering heat treatment was observed, and the chemistry and other characteristics of the precipitates were studied. The results showed that the experimental steel had a typical tempered martensitic structure. The precipitates located in various boundaries were Cr–rich carbides M23C6. After quenching and tempering, the specimens were cold deformed to a reduction of 60% and then annealed at 820 for 10–300 min. M23C6 wouldn't disappear during the process of recrystallization and transformation from ferrite to austenite at high temperature. The proportion of Cr to Fe was increasing during the process and finally reached to 2. The chemistry composition was (Cr15Fe6W2)C6.
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Received: 26 October 2009
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| Fund: Supported by National Key Basic Research and Development Program of China No.2007CB209801. |
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