Patent ID: 9694426
Date: 2017-07-04
CPC Classifications: B22F,B23B,C04B,C22C,C23C

Claim:
1. A cutting tool comprising: a cemented carbide that is composed mainly of a WC phase and contains 11.5-12.5% by mass of Co and 0.2-0.6% by mass of Cr in terms of Cr the WC phase has a mean particle size of 0.85-1.05 μm, the cemented carbide has an antimagnetic force (Hc) of 13.0-16.0 kA/m, and a Rockwell hardness (HRA) of 89.5-90.5, the Co exists in a bonding phase that establishes a bond between the WC phases, tungsten (W) is contained in the bonding phase, and a content ratio of the tungsten reaches a maximum value at a location which lies at depths in a range of 50-200 μm from a surface of the cemented carbide.