| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool formed of cemented carbide which exerts excellent chipping resistance and abrasion resistance in high-speed intermittent cutting work for steel and cast iron. <P>SOLUTION: In the surface-coated cutting tool formed of the cemented carbide, a tough layer composed of a β-free layer is formed along a ridge line of a cutting edge in an area with a depth of 5-50 μm in a normal direction of a cutting face and an area with a depth of 30-200 μm in a normal direction of a flank in a cemented-carbide tool base; and the cemented carbide has a substantially uniform composition in an area except for the tough layer. <P>COPYRIGHT: (C)2012,JPO&INPIT |
