| 摘要 |
PROBLEM TO BE SOLVED: To provide a WC-based cemented carbide having both excellent hardness and toughness. SOLUTION: The WC-based cemented carbide is characterized in that: a binder phase is composed of 3 to 15 wt.% of at least one iron-group metal element; two or more elements among Cr, Ta, V, Ti and Zr are contained; Ta content is 0.005 to 0.06 wt.%; Cr content ranges from 0.03 to 0.2 in weight ratio to the binder phase; the balance has WC and inevitable impurities; and the average grain size of WC is made to≤0.3μm. COPYRIGHT: (C)2008,JPO&INPIT
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