Ti_(2)AlNb合金粉末热等静压成形的组织和性能  

Microstructure and Mechanical Properties of Powder Metallurgy Ti_(2)AlNb Alloy Prepared by Hot Isostatic Pressing

作　　者：吴杰[1] 朱旭晖 尹一峰 尚学文 卢正冠 徐磊[1] WU Jie;ZHU Xuhui;YIN Yifeng;SHANG Xuewen;LU Zhengguan;XU Lei(Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;AECC Shenyang Engine Research Institute,Shenyang 110015,China;University of Science and Technology of China,Shenyang 110016,China)

机构地区：[1]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110016 [2]中国航发沈阳发动机研究所,沈阳110015 [3]中国科学技术大学,沈阳110016

出　　处：《航空制造技术》2024年第17期50-58,共9页Aeronautical Manufacturing Technology

基　　金：国家科技重大专项(J2019-Ⅶ-0005-0145);中国科学院战略性先导科技专项(XDA22010102);稳定支持基础研究领域青年团队计划(YSBR-025)。

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Ti_(2)AlNb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Ti_(2)AlNb合金,研究了制粉工艺对Ti_(2)AlNb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Ti_(2)AlNb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Ti_(2)AlNb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Ti_(2)AlNb粉末合金复杂部件。Ti_(2)AlNb 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.Ti_(2)AlNb alloy was prepared by hot isostatic pressing(HIP)process,and the effects of powder preparing process on microstructure and mechanical properties of Ti_(2)AlNb alloy were investigated.The experimental results show that the compaction density of Ti_(2)AlNb powder prepared by EIGA method is higher than that of PREP method.The forming research of Ti_(2)AlNb 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.Ti_(2)AlNb pre-alloyed powder prepared by EIGA with higher compaction density is preferred to prepare powder metallurgy complex components.

关 键 词：Ti_(2)AlNb合金 粉末冶金 热等静压 近净成形 有限元仿真 

分 类 号：TF124[冶金工程—粉末冶金]