| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cutting tool exclusive for a lead-free copper-based bearing alloy having excellent cutting property and durability of the lead-free copper-based bearing alloy. <P>SOLUTION: This cutting tool 1 is used for cutting the lead-free copper-based bearing alloy containing 75-95 mass% Cu, 1 to 15 mass% Bi and 1 to 10 mass% hard particles composed of metal phosphide, boride or carbide. The cutting tool 1 has a rake face 12, a flank 13 and a cutting edge 14 formed on a line of intersection between the rake face 12 and the flank 13. A distal end portion including the cutting edge 14 consists of a diamond tip 2. The diamond tip 2 consists of a sintered body obtained by sintering diamond particles having an average particle diameter (D50) of 0.2 to 1.6μm. The cross section of the cutting edge 14 preferably has a curved surface shape with a radius of curvature 10 to 50μm. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
