| 摘要 |
PROBLEM TO BE SOLVED: To provide a throw away tip made of cermet, which has fine hard phase structure, high cutting performance, and small dispersion of the cutting performance among the tips. SOLUTION: The throw away tip is made of the cermet composed of 1-30mass% bonding phase having Co and/or Ni as main components, and 70-99mass% hard phase composed of compound metal carbonitride of Ti and one or more kinds of metals among 4a, 5a, and 6a group metals in the periodic table other than Ti, and has an almost flat plate shape. The average grain size of the hard phase is at most 1.5μm. The Weibull coefficient of the transverse rupture strength of the transverse rupture test pieces, which are taken so as to include the side surface of the tip from ten pieces of the throw away tips, is at least 5. COPYRIGHT: (C)2004,JPO&NCIPI
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