合金元素对KT5331叶片钢析出相及高温持久性能的影响

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Influence of Alloying Elements on the Precipitation Phase and High-temperature Endurance Property of Blade Steel KT5331

1. Special Steel Research Department of Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China;
2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, Liaoning, China

摘要: 热力学软件及试验研究合金元素对KT5331钢析出相的影响。结果表明：M₂₃C₆析出温度、析出量由C元素决定，钢中Cr、Mo元素含量对M₂₃C₆析出温度影响较大。Laves相析出量由W含量决定。根据合金元素对析出相的影响规律，分析了合金元素对KT5331钢高温持久性能的影响。结果表明：降低C含量，Cr、W元素含量在下限，Mo元素含量在中上限，对KT5331钢高温持久性能有利。
- KT5331叶片钢 /
- M₂₃C₆ /
- Laves相 /
- 高温持久性能
Abstract: The influence of alloying elements on equilibrium precipitation phases of KT5331 were studied by Factsage software and experiment.The results show that the amount of M₂₃C₆ carbide is determined by C content in steel.The fluctuation of Cr,Mo content in steel has effect on precipitation temperature of M₂₃C₆.The amount of Laves phase is determined by the W content.Based on the influence of alloying elements on the precipitated phase,the influence of alloying elements on the high-temperature endurance property of KT5331 steel was analyzed.The results showed that in order to achieve high temperature durability of KT5331 steel,the C content should be reduced and the Cr and W elements are at the lower level,and the Mo element content is at the middle or upper limit.
- KT5331 /
- M₂₃C₆ /
- Laves phase /
- high-temperature endurance property