| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface-coated tool with a stable high wear resistance, achieved by suppressing the separation of a coated layer and by improving wear resistance of the base body surface itself. SOLUTION: In the surface-coated tool, the coated layer 6 is formed on the surface of the base body 1 made of a cemented carbide of a WC phase 2, a binding phase 3 made of one or more ferrous metals, and a B1-type solid solution phase 4, other than WC, made of a carbide, nitride, or carbonitride of one or more metals of group 4, 5, and 6, including Zr, in the periodic table. The surface area 7 of the base body 1 with a depth of 5-100μm from the surface is dotted with a ZrO<SB>2</SB>phase 5, but has noηphase. The inside of the base body 1 with a depth deeper than 100μm from the surface has no ZrO<SB>2</SB>phase 5, or is dotted with a ZrO<SB>2</SB>phase 5 with an average particle diameter of 1/5 or less of the average particle diameter of the ZrO<SB>2</SB>phase 5 in the surface area 7. COPYRIGHT: (C)2011,JPO&INPIT
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