CEMENTED CARBIDE

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PROBLEM TO BE SOLVED : To provide a cemented carbide having high strength and reduced in the variation of the strength. SOLUTION : The cemented carbide has a composition comprising, by weight, 0.0001 to 0.002% Al, 0.0001 to 0.002% Ca, 0.0002 to 0.005% rare earth elements, one or two kinds selected from Co and Ni by 3 to 20%, the group 4a, 5a, 6a elements in the Periodic Table excluding W by 0.2 to 2%, 5 to 6% C (carbon) and ≤0.2% N (nitrogen), and the balance W with inevitable impurities. COPYRIGHT : (C)2008, JPO&INPIT