| 摘要 |
PROBLEM TO BE SOLVED: To provide an HfN coating tool having excellent wear resistance at high temperature and long life, used for high speed machining, dry machining and cutting for difficult-to-cut material by heightening the adhesiveness of a tool base metal and an HfN film. SOLUTION: A TiN film 14 and (Ti, Hf) N film 16 are provided on the surface of the base metal 12 of the tool, and the HfN film 18 is provided on the (Ti, Hf) N film 16, whereby the adhesiveness to the cemented carbide tool base metal 12 is improved due to the existence of the TiN film 14. Further the (Ti, Hf) N film 16 has high bonding strength of the film itself, and the adhesiveness of the TiN film 14 and the HfN film 18 is high to improve the bond strength to the tool base metal 12 as the whole coating film. Further, the HfN film 18 attaining excellent wear resistance at high temperature is provided on the uppermost part, whereby excellent durability (wear resistance) is obtained for high speed machining, dry machining and cutting for material difficult to cutting, so that the life of the tool can be substantially improved in combination with the improvement in bond strength. COPYRIGHT: (C)2006,JPO&NCIPI
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