| 摘要 |
PROBLEM TO BE SOLVED: To prolong the lifetime of a cBN cutting tool used for cutting a heat resistant alloy.SOLUTION: The cBN cutting tool comprises: a cutting-edge chip made of a cBN sintered body using cBN particles of which the average particle diameter is 0.5 μm or more and 2 μm or less and having heat conductivity of 20 to 70 W/m K; and a base metal holding the cutting-edge chip in a corner. A positive rake angle is given to a cutting edge that is provided in the cutting edge chip of the tool.SELECTED DRAWING: Figure 4 |
