北京科技大学学报2009，Vol.31Issue(6)：719-727,9.
合金元素对新型镍基粉末高温合金的热力学平衡相析出行为的影响
Effect of alloy elements on the precipitation behavior of thermodynamic equilibrium phases in new type nickel-based P/M superalloys
摘要
Abstract
The effects of alloy elements on the precipitation behaviors of equilibrium phases in new type nickel-based powder metallurgy (P/M) superalloys at aging temperature were studied systematically by a thermodynamic calculation method. The calculation results show that the equilibrium precipitation phases of René104 are γ', MC, M_(23)C_6, M_3B_2 and TCP phases. Cr and Co contents mainly influence the precipitation behaviors of TCP phases and the precipitation temperature of γ' phase. Cr content also plays a role in the precipitation behaviors of M_(23)C_6 and M_3B_2. The suggested content of Cr is 13 % . Mo and W contents influence the precipitation behaviors of TCP phases and M_3B_2. The mass ratios of A1/Ti and Nb/Ta affect the precipitation behaviors of γ' phase. It suggests controlling the values of Al/Ti and Nb/Ta to be unity in order to make γ' phase having desire strengthen effect. C and B contents significantly influence the precipitation volumes of carbides and borides; they can restrain the precipitation of TCP phases indirectly. Zr content influences the precipitation behaviors of MC and M_(23)C_6. Besides, it is revealed that the composition optimization and design trend of the 3rd generation P/M turbine disc superalloys is with more Co, less Cr and to obtain a smaller lattice mismatch by adjusting the contents of alloy elements.关键词
粉末冶金高温合金/热力学计算/平衡相/涡轮盘/优化设计Key words
P/M superalloy/ thermodynamic calculation/ equilibrium phase/ turbine disc/ optimization design分类
金属材料引用本文复制引用
吴凯,刘国权,胡本芙,吴昊,张义文,陶宇,刘建涛..合金元素对新型镍基粉末高温合金的热力学平衡相析出行为的影响[J].北京科技大学学报,2009,31(6):719-727,9.基金项目
国家武器装备预研基金资助项目(No.9140A12070507QT0202) （No.9140A12070507QT0202）
国家高技术研究发展计划资助项目(No.2007AA03A223) （No.2007AA03A223）
