(1. 中國科學(xué)院 金屬研究所，沈陽 110016；
2. 東北大學(xué) 材料與冶金學(xué)院，沈陽 110819)
摘 要: 采用熱等靜壓工藝制備Ti-6Al-4V和Ti-60兩種預(yù)合金粉末鈦合金，研究兩種不同包套形式對粉末合金拉伸性能的影響，采用SEM觀察粉末合金的拉伸斷口形貌，并利用MSC.Marc有限元分析軟件對兩種包套在熱等靜壓過程中包套各部位的尺寸收縮進(jìn)行模擬預(yù)測。結(jié)果表明：包套結(jié)構(gòu)設(shè)計(jì)不合理時(shí)，焊縫在熱等靜壓過程中存在泄漏的風(fēng)險(xiǎn)，進(jìn)而會(huì)嚴(yán)重惡化粉末合金的性能；有限元模擬仿真可以輔助包套設(shè)計(jì)，提高效率，對制備粉末冶金近凈成型構(gòu)件有較為重要的工程應(yīng)用意義。
關(guān)鍵字: Ti-6Al-4V；Ti-60；包套設(shè)計(jì)；粉末冶金；拉伸性能
（1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:Pre-alloyed powders of Ti-6Al-4V and Ti-60 were prepared through hot isostatic pressing (HIP) route. The tensile properties of two typical powder metallurgy (PM) titanium alloys HIPped from two different kinds of cans were tested, and the fracture surface morphology was studied by SEM. The simulation, using MSC.Marc software of capsule/powder shrinkage during HIPping for two different can designs was presented. The numerical simulations of Hipping experiments indicate that improper can design shows great probability of capsule failures, which is in accordance with the experimental data. Capsule failure will deteriorate the mechanical properties of the PM alloys, and finite element method is a useful tool for can design, especially for manufacturing near-net-shape components.
Key words: Ti-6Al-4V; Ti-60; can design; powder metallurgy; tensile property
