粉体および粉末冶金
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
研究論文
合金粉末を原料とする高強度チタン合金板材の製造
深田 伸男叶野 治早川 昌志
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2016 年 63 巻 8 号 p. 739-746

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Low-cost, high-strength titanium alloy plates were prepared using a prealloyed titanium powder (Ti-6Al-4V) as a starting material. Ti-6Al-4V was prepared via a hydrogenation/dehydrogenation process from Ti-6Al-4V alloy machine turnings. Prealloyed Ti-6Al-4V and iron (3 %–3.5 %) powders were mixed and subsequently consolidated by a vacuum hot pressing (VHP) process. Densification of the prealloyed powder to the theoretical density level was confirmed by VHP process. The combination of VHP, hot rolling, and mill annealing processes led to the production of titanium alloy plates with a 1200 MPa tensile strength and a 5 % elongation. Remarkably, the Ti-6Al-4V alloy exhibited enhanced tensile strength and lower elongation values upon iron addition.

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© 2016一般社団法人粉体粉末冶金協会
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