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| Formation and Evolution of Microstructures in Fe–9%Cr Heat-Resistant Steel | |
| 基金项目： | Acknowledgments This work was financially supported by the National Magnetic Confinement Fusion Program （No. 2011GB108002） and the National Natural Science Foundation of China （No. 51071021）. |
| 摘 要： | Microstructures of casting samples of Fe–9%Cr steel and samples subjected to different heat treatments were investigated to determine their formation and evolution mechanism. The results show that there is no macroscopic segregation in the casting Fe–9%Cr steel. During cooling from solidification temperature to room temperature, d-ferrite→austenite transformation is obviously influenced by cooling rate, while subsequent transformation of austenite does not obviously depend on the cooling rate. In the casting samples, a great number of precipitates distribute inside martensitic laths while there are almost no precipitates inside d-ferrite. When the casting samples were reheated to and isothermally held at 800 °C, the original precipitates and the lath boundaries disappeared gradually. Meanwhile, new precipitates nucleate and grow at the prior lath boundaries. |
| 关 键 词： | 微观结构演变 铁素体 耐热钢 马氏体板条 奥氏体转变 冷却速率 演化机制 宏观偏析 |
Formation and Evolution of Microstructures in Fe-9%Cr Heat-Resistant Steel |
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| Boling Zhu Shanwu Yang Guangshan Yang Guoliang Liu. Formation and Evolution of Microstructures in Fe-9%Cr Heat-Resistant Steel[J]. Acta Metallurgica Sinica(English Letters), 2014, 0(3): 534-538 | |
| Authors: | Boling Zhu Shanwu Yang Guangshan Yang Guoliang Liu |
| Affiliation: | School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| Abstract: | Heat-resistant steel Microstructure Precipitates δ-Ferrite Casting |
| Keywords: | Heat-resistant steel Microstructure Precipitates δ-Ferrite Casting |
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