Preparation for WC-Ni<sub>3</sub>Al Hard Metal by Vacuum Sintering
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- KATOU Kiyotaka
- Magnetic Powder Metallurgy Research Center, National Institute of Advanced Science and Technology
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- SHIMOJIMA Koji
- Magnetic Powder Metallurgy Research Center, National Institute of Advanced Science and Technology
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- HOSOKAWA Hiroyuki
- Magnetic Powder Metallurgy Research Center, National Institute of Advanced Science and Technology
Bibliographic Information
- Other Title
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- 真空焼結によるWC-Ni<sub>3</sub>Al超硬合金の作製
- 真空焼結によるWC-Ni₃Al超硬合金の作製
- シンクウ ショウケツ ニ ヨル WC-Ni ₃ Al チョウコウゴウキン ノ サクセイ
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Description
<p>WC-Ni3Al hard metal of the composition for WC-25 vol% (Ni-24 at%Al-0.5 at%B) was prepared by vacuum sintering. The powder mixtures of WC, Ni, NiAl (Ni-50 at%Al) and B were treated by wet milling with tumbling ball mill machine for 24 hr and 48 hr. The average particle size of the powder mixtures after wet-milling for 24 hr and 48 hr were 1.69 μm and 1.23 μm, respectively. These powder mixtures were press-molded into the test-piece and sintered in vacuum of (7~9) × 10−3 Pa at various temperature for 1 hr. The densities, microstructures and mechanical properties of the obtained sintered compacts were investigated. When 48 hr wet-milled powder was used and the green compact was sintered at 1425°C for 1 hr, the compact had a relative density more than 99%, transverse rapture strength of 2.2 GPa and vickers hardness of 1330 HV. On the other hand, using 24 hr wet-milled powder, the sintered compact had lower mechanical properties than the compact of 48 hr wet-milled powder due to low density and inhomogeneous microstructure.</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 64 (11), 615-620, 2017
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
- 1390282681287211904
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- NII Article ID
- 130006224973
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 028702262
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed