| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a surface-coated cemented carbide insert which exhibits superior chipping resistance and thermal plastic deformation resistance. <P>SOLUTION: The surface-coated cemented carbide insert is formed by vapor depositing a hard coating layer on a base which is made of a WC-based cemented carbide obtained by forming and sintering a compound material containing as a material: at least WC powder and Co powder; and further, one or two of carbide of Zr, carbonitride, and nitride powder; and one or two of carbide of Ta, carbonitride, and nitride powder; or solid solution powder of one or two of carbide of Zr and Ta, carbonitride, and nitride. A Co-enriched surface area is formed on the surface of the base. The Co content in the Co-enriched surface area satisfies 1.30-2.10 (by mass ratio) of the Co content in the cemented carbide, and the Ta content in the Co-enriched surface area is 0.026-0.086 (by mass ratio) of the Co content in the Co-enriched surface area. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
