Powder forming process from machined titanium chips via heat treatment in hydrogen atmosphere
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- UMEDA Junko
- Joining and Welding Research Institute, Osaka University
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- MIMOTO Takanori
- Dept. Mechanical Engineering, Osaka University
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- IMAI Hisashi
- Joining and Welding Research Institute, Osaka University
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- KONDOH Katsuyoshi
- Joining and Welding Research Institute, Osaka University
Bibliographic Information
- Other Title
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- 水素熱処理を利用したチタン切削屑の粉体化プロセス
- スイソ ネツ ショリ オ リヨウ シタ チタン セッサククズ ノ フンタイカ プロセス
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Description
<p>The recycling process of the machined chips from the commercial Ti-6%Al-4%V (Ti-64) alloys to raw powders was established through the combination of brittle TiH2 compounds formation via heat treatment in hydrogen gas atmosphere and fragmentation by ball milling technique. TG-TDA and XRD analysis obviously suggested the hydride and dehydride behavior of pure Ti and TiH2 powders. The suitable heat treatment temperature at 873 K or more in H2-Ar mixed gas successfully caused the formation of TiH2 compounds, and resulted in the fragmentation of Ti-64 machined chips to powders with a median particle size of 120 μm, which were completely consolidated by pressing. In addition, the original machined chips never remained in the ball-milled machined chips after heat treated over 873 K. The green compact after vacuum sintering at 1273 K showed a relative density of about 93%, larger than that of the sintered material in using the commercial Ti-64 powders.</p>
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 63 (12), 1002-1008, 2016
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390282681288716544
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- NII Article ID
- 130005250940
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 027743324
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed