| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diamond coated cutting tool which has excellent impact resistance, lubricity and chip discharge property at a cutting edge and exhibits excellent wearing resistance in long-time use. <P>SOLUTION: In a diamond coated cutting tool with a tool substrate surface coated with a crystalline diamond layer, a nano diamond layer having an average particle size from 1-50 nm is formed for coating a surface of the crystalline diamond layer of a cutting blade. A shortest distance from a top end of the cutting blade to the crystalline diamond layer is set to 3-15 μm. Further, an amorphous carbon film having a surface roughness of 0.1 μm or less and having a film thickness of 10-200 nm, is formed on a cutting face side top layer of the nano diamond layer of the cutting blade (further on a flank side top layer of the nano diamond layer). <P>COPYRIGHT: (C)2012,JPO&INPIT |
