Invention Grant
- Patent Title: Surface-coated cutting tool
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Application No.: US14770304Application Date: 2014-02-26
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Publication No.: US09782830B2Publication Date: 2017-10-10
- Inventor: Masaki Okude , Kenji Yamaguchi , Akira Osada
- Applicant: MITSUBISHI MATERIALS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI MATERIALS CORPORATION
- Current Assignee: MITSUBISHI MATERIALS CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Leason Ellis LLP
- Priority: JP2013-035566 20130226; JP2014-032483 20140224
- International Application: PCT/JP2014/054663 WO 20140226
- International Announcement: WO2013/132995 WO 20140904
- Main IPC: B23B27/14
- IPC: B23B27/14 ; C23C16/36 ; C23C16/40 ; C23C16/56 ; C23C28/04 ; C23C30/00

Abstract:
A surface-coated cutting tool includes a lower layer including a Ti compound layer, an intermediate layer including an α-Al2O3 layer, and an upper layer including a Zr-containing α-Al2O3 layer. The outermost layer of the lower layer contains 0.5 to 3 at % of oxygen. The frequencies of inclination angles between a normal line to a (0001) plane of Al2O3 grains of the intermediate layer and a normal line to a surface of a tool body have a highest peak in an inclination angle division of 0 to 10°. The ratio of the frequencies is 50 to 70%. The frequencies between the normal line to the (0001) plane of Al2O3 grains of the entirety of the intermediate and the upper layers and the normal line to the tool body surface have a highest peak in an inclination angle division of 0 to 10°. The ratio of the frequencies is 75% or more.
Public/Granted literature
- US20160001375A1 SURFACE-COATED CUTTING TOOL Public/Granted day:2016-01-07
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