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粉末粒形对Ti-6Al-4V注射成形喂料显微形貌及流变性能的影响 被引量:4

Effect of powder shape on microscopic morphology and rheological properties of Ti-6Al-4V injection molding feedstock
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摘要 采用粒度分析、显微形貌分析及流变性能分析等方法,研究了不同粒形Ti-6Al-4V注射成形喂料的显微形貌和流变性能。实验结果显示,球形粉喂料与氢化脱氢粉喂料的临界装载量分别为67%和52%。在最佳装载量下,球形粉喂料的粘度值(η)和流动行为指数(n)均小于氢化脱氢粉喂料,表明球形粉喂料具有更好的流动性。粒形分析显示,降低粉末比表面积有利于提高金属粉末注射成形喂料的临界装载量;理论研究及能谱分析则指出,氢化脱氢粉喂料的低流动性与小颗粒粉末的分布密切相关,小颗粒粉末是影响喂料流动性能的关键因素。 Microscopic morphology and rheological properties of Ti-6Al-4V injection molding feedstock with different powder shapes were studied by particle size analysis, microscopic morphology analysis and rheological property analysis. Powder loading test results show that the critical powder loading of S-Ti powder feedstock and HDHTi powder feedstock are 67% and 52% respectively. Viscosity(η) and flow behavior index(n) values of S-Ti powder feedstock are lower than those of HDH-Ti powder feedstock at optimum powder loading, which indicate that the STi powder feedstock has better fluidity. Particle shape analysis result shows that reducing specific surface area of powder is helpful to the increasing of the critical loading of Ti-6Al-4V powder injection molding feedstock. In addition, theoretical research and energy spectrum analysis point out that the fluidity of HDH-Ti powder feedstock is decided by the distribution of smaller particle.
作者 崔珊 张恩耀 胡可 周鹏 周超 CUI Shan;ZHANG Enyao;HU Ke;ZHOU Peng;ZHOU Chao(Department of Aeronautical Materials Engineering,Xi’an Aeronautical Polytechnic Institute,Xi’an 710089,China;Guangdong Institute of Materials and Processing,Guangdong Academy of Sciences,Guangzhou 510650,China)
出处 《粉末冶金工业》 CAS 北大核心 2022年第4期31-37,共7页 Powder Metallurgy Industry
基金 陕西省高校青年创新团队项目(2019-73) 陕西省教育厅青年创新团队建设科研计划项目(21JP055) 西安航空职业技术学院科研计划重点项目(19XHZK005) 西安航空职业技术学院高层次人才科研启动金项目(18XHQDJ-001)。
关键词 TI-6AL-4V 粉末注射成形 喂料 显微形貌 流变性能 Ti-6Al-4V powder injection molding feedstock microscopic morphology rheological property
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