摘要
本文采用无坩埚电极感应气雾化法(EIGA)制备了Ti-48Al-2Cr-2Nb与Ti-47.5Al-6.8Nb-0.2W预合金粉末,并对粉末的特性进行了对比研究。结果表明,两种TiAl预合金粉末具有良好的球形度,且粒度分布符合正态分布;粉末的气体含量较低,其中氧元素的含量保持一致,Ti-47.5Al-6.8Nb-0.2W预合金粉末中氮元素、氢元素含量较高;粉末的显微组织形貌表现为树枝晶状,XRD分析结果表明Ti-48Al-2Cr-2Nb预合金粉末的主要相为γ相,而Ti-47.5Al-6.8Nb-0.2W预合金粉末的主要相为α2相。
Ti-48Al-2Cr-2Nb and Ti-47.5Al-6.8Nb-0.2W prealloyed powders were prepared by crucible-free electrode induction gas atomization(EIGA),and the characteristics of the powders were compared.The results show that the two kinds of TiAl prealloyed powders have good sphericity and the particle size distribution conforms to a normal distribution.The gas content of both powders is low,of which the content of oxygen is consistent,while the contents of nitrogen and hydrogen in Ti-47.5Al-6.8Nb-0.2W prealloyed powder are high.The microstructure morphology of the powders shows dendritic crystallines,and the XRD analysis shows that the main phase of the Ti-48Al-2Cr-2Nb prealloyed powder is theγphase,while the main phase of the Ti-47.5Al-6.8Nb-0.2W prealloyed powder is theα2 phase.
作者
范紫钊
李金山
陈玮
杨洋
高文强
唐斌
FAN Zizhao;LI Jinshan;CHEN Wei;YANG Yang;GAO Wenqiang;TANG Bin(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;AVIC Manufacturing Technology Institute,Beijing 100024,China)
出处
《铸造技术》
CAS
2022年第11期970-974,共5页
Foundry Technology
基金
凝固技术国家重点实验室自主研究课题(2022-TS-06)
国家重点研发计划(2021YFB3702603)
国防基础科研计划资助(JCKY2017205A002)。
关键词
TIAL
EIGA法
电子束选区熔化技术
预合金粉末
形貌
TiAl
electrode induction gas atomization method
selective electron beam melting technology
prealloyed powders
morphology
