Microstructural Development and Properties of New WC-CO Base Hardmetal Prepard From CoxWyCz+C Instead of WC (特集 硬質材料)
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概要
- 論文の詳細を見る
We had already reported that WC-Co base hardmetal (W+Graphite+Co alloy) prepared from W+Graphite mixed powder instead of conventional WC powder has a large amount of highly oriented plate-like triangular prismatic WC crystal grains, and that both fracture toughness and transverse-rupture strength are higher than those of the conventional hardmetals at an identical hardness. In this study, we prepared another new WC-Co base hardmetal by using Co, W, C, complex carbide such as CO<SUB>3</SUB>W<SUB>9</SUB>C<SUB>4</SUB> (K) and Co<SUB>2</SUB>W<SUB>4</SUB>C (θ) as the main starting material. It was clarified that WC crystal grains in the new hardmetal are also plate-like triangular prismatic, but are not oriented, differing from W+Graphite+Co alloy. The fracture toughness, however, was higher by 10-15% than that of the conventional alloy at an identical hardness, while the transverse-rupture strength was comparable with that of the conventional alloy.
- 社団法人 粉体粉末冶金協会の論文
- 2001-07-15
著者
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Kitamura Kozo
Toshiba Tungaloy Co. Ltd.
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Kobayashi Masaki
Toshiba Tungaloy Co. Ltd.
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Hayashi Koji
Institute Of Industrial Science The University Of Tokyo
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Hayashi Koji
Institute Of Industrial Science
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