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电子束增材制造用TiAl预合金粉末表征
Characterization of TiAl Prealloyed Powders for Electron Beam Additive Manufacturing
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- DOI:
- 作者:
- 范紫钊1李金山1陈玮2杨洋2高文强1唐斌1
FAN Zizhao1 , LI Jinshan1 , CHEN Wei2 , YANG Yang2 , GAO Wenqiang1 , TANG Bin1
- 作者单位:
- 1. 西北工业大学 凝固技术国家重点实验室，陕西 西安 710072；2. 中国航空制造技术研究院，北京 100024
1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 2. AVIC Manufacturing Technology Institute, Beijing 100024, China
- 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
- 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 the γ phase, while the main phase of the Ti-47.5Al-6.8Nb-0.2W prealloyed powder is the α2 phase.