【摘要】 分别采用等离子旋转电极雾化法（Plasma rotating electrode process,PREP）和无坩埚感应熔炼超声气体雾化法（Electrode induction melting gas atomization,EIGA）制备了Ti₂AlNb洁净预合金粉末，并对预合金粉末进行了表征。通过热等静压（Hot isostatic pressing,HIP）工艺制备了Ti₂AlNb合金，研究了制粉工艺对Ti₂AlNb合金显微组织与力学性能的影响。试验结果表明，与PREP法相比，EIGA法制备的Ti₂AlNb粉末振实密度更高；基于粉末热等静压近净成形技术，在1030℃/140 MPa/3 h的条件下开展了Ti₂AlNb叶轮的成形研究，有限元模拟结果显示，粉末振实密度越高，部件热等静压后变形程度越小，综合考虑构件成形，优选振实密度更高的EIGA制粉工艺制备Ti₂AlNb粉末合金复杂部件。更多还原

【Abstract】 Ti₂AlNb pre-alloyed powders were prepared by plasma rotating electrode process（PREP） and electrode induction melting gas atomization（EIGA） respectively, and the pre-alloyed powders were characterized. Ti₂AlNb alloy was prepared by hot isostatic pressing（HIP） process, and the effects of powder preparing process on microstructure and mechanical properties of Ti₂AlNb alloy were investigated. The experimental results show that the compaction density of Ti₂AlNb powder prepared by EIGA method is higher than that of PREP method. The forming research of Ti₂AlNb impeller was carried out under the regime of 1030 ℃/140 MPa/3 h based on the powder metallurgy HIP near net shape technology.The finite element simulation results show that the higher the powder compaction density, the smaller the deformation degree of the HIPed component. Ti₂AlNb pre-alloyed powder prepared by EIGA with higher compaction density is preferred to prepare powder metallurgy complex components.更多还原