| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated cutting tool and a manufacturing method for the coated cutting tool, which provides excellent abrasion resistance, thermal crack proofing, and toughness. SOLUTION: The film cutting tool includes: a base material 1 laminated with a fine grain layer 1p made of WC group cemented carbide using WC particles 10p of fine grain as a hard layer and a coarse grain layer 1g made of WC group cemented carbide using WC particles 10g of coarse grain as a hard layer; and a coated film 2 formed on the base material 1 surface. The mean particle diameter of WC particles 10p of the fine grain layer 1p is more than 1μm and 3μm or less, and the mean particle diameter of WC particles 10g of the coarse grain layer 1g is more than 3μm. The fine grain layer 1p is disposed on the surface side of the base material, and the coated film 2 is formed on this layer 1p by means of physical vapor deposition. Crystal grain 20 which is developed by direct contact with the WC particles 10p of the fine grain layer 1p exists among the crystal grain 20 which constitutes the coated film 2, and the grain diameter of the crystal grain 20 is the size approximately same as the WC particles 10p of the fine grain layer 1p. The coating cutting tool is manufactured by forming the coated film 2 after performing bombardment process on the base material 1 surface using dilute gas ion. COPYRIGHT: (C)2009,JPO&INPIT
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