Invention Grant
- Patent Title: Laminated hard film and cutting tool
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Application No.: US15318612Application Date: 2015-06-23
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Publication No.: US10309017B2Publication Date: 2019-06-04
- Inventor: Maiko Abe , Kenji Yamamoto , Hiroaki Nii
- Applicant: KOBE STEEL, LTD.
- Applicant Address: JP Kobe-shi
- Assignee: Kobe Steel, Ltd.
- Current Assignee: Kobe Steel, Ltd.
- Current Assignee Address: JP Kobe-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2014-129122 20140624; JP2015-089285 20150424
- International Application: PCT/JP2015/068106 WO 20150623
- International Announcement: WO2015/199102 WO 20151230
- Main IPC: B23B27/14
- IPC: B23B27/14 ; C23C28/04 ; B23B51/00 ; B23C5/16 ; C23C14/06 ; C04B41/50 ; C04B41/52 ; C23C28/00 ; C23C30/00

Abstract:
A laminated hard coating comprising a layer A and a layer B, wherein the layer A and the layer B differ in composition and are laminated. Layer A contains (MaAlbCrcTad)(BxCyNz) and satisfies 0≤a≤0.35, 0.05≤d≤0.35, 0≤x≤0.15, 0≤y≤0.50, a+b+c+d=1, and x+y+z=1. M is at least one element selected from the group consisting of V, Nb, Mo, and W; a, b, c and d represent the atomic ratios of M, Al, Cr, and Ta, respectively; and x, y, and z represent the atomic ratios of B, C and N, respectively. The layer B comprises (TiαSiβ)(BxCyNz) and satisfies 0.05≤β≤0.35, 0≤x≤0.15, 0≤y≤0.50, α+β=1, and x+y+z=1. α and β represent the atomic ratios of Ti and Si, respectively, and x, y, and z represent the atomic ratios of B, C, and N, respectively. One or more layers of each of these layers have been alternately laminated.
Public/Granted literature
- US20170152602A1 LAMINATED HARD FILM AND CUTTING TOOL Public/Granted day:2017-06-01
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