Invention Grant
- Patent Title: Multilayer-coated cutting tool
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Application No.: US09903561Application Date: 2001-07-13
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Publication No.: US06586122B2Publication Date: 2003-07-01
- Inventor: Takeshi Ishikawa , Nobuhiko Shima
- Applicant: Takeshi Ishikawa , Nobuhiko Shima
- Priority: JP2000-213536 20000713
- Main IPC: B23B2714
- IPC: B23B2714

Abstract:
A multilayer-coated cutting tool comprising a cutting tool substrate, and a multilayer coating film comprising a first hard coating film formed on the substrate and a second hard coating film formed on the first hard coating film, the first hard coating film comprising one or more metallic elements selected from the group consisting of Ti, Al and Cr, and one or more non-metallic elements selected from the group consisting of N, B, C and O; and the second hard coating film comprising Si and one or more metallic elements selected from the group consisting of metallic elements of Groups 4a, 5a and 6a of the Periodic Table and Al, and one or more non-metallic elements selected from the group consisting of N, B, C and O; the second hard coating film being a composition-segregated polycrystalline film comprising a phase having a relatively high Si concentration and a phase having a relatively low Si concentration.
Public/Granted literature
- US20020039670A1 Multilayer-coated cutting tool Public/Granted day:2002-04-04
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