摘要
采用无坩埚感应熔炼超声气体雾化法制备了洁净Ti-5Al-2.5Sn ELI预合金粉末,并利用包套热等静压工艺制备了全致密的Ti-5Al-2.5Sn ELI合金叶轮。测试了6个不同批次Ti-5Al-2.5Sn ELI合金的化学成分和力学性能,统计了不同批次粉末合金的性能及成分变化规律。研究结果表明,采用包套热等静压工艺可获得全致密的Ti-5Al-2.5Sn ELI合金,合金成分稳定均匀,力学性能接近锻造合金的水平且稳定性好。采用该工艺制备的Ti-5Al-2.5Sn ELI合金叶轮与包套界面反应小,且组织中晶粒细小均匀,无孔隙缺陷。
Pre-alloyed powder of Ti-5Al-2.5Sn ELI(wt.%) was prepared by electrode induction melting gas atomizat ion(EIGA) and powder metallurgy(PM) impellers were made through a canning hot isostatic pressing route.Composition fluctuations and mechanical properties changes of six batches of PM alloys were studied and the reasons were analyzed.The results show that the fully dense Ti-5Al-2.5Sn ELI alloy can be obtained by hot isostatic pressing,chemical composition of the alloy is homogeneous and fluctuation is small;the mechanical properties are close to the level of wrought alloy and the stability is good.The interface thickness between PM Ti-5Al-2.5Sn ELI impellers and containers is small.PM Ti-5Al-2.5Sn ELI alloy has small grain size and no macro pore is observed in alloy.
作者
李一平
龚燚
崔潇潇
郭瑞鹏
徐磊
Li Yiping;Gong Yi;Cui Xiaoxiao;Guo Ruipeng;Xu Lei(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;University of Science and Technology of China,Shenyang 110016,China;Beijing Aerospace Propulsion Institute,Beijing 100076,China)
出处
《钛工业进展》
CAS
北大核心
2019年第3期22-25,共4页
Titanium Industry Progress
