SURFACE-COATED CUTTING TOOL - MITSUBISHI MATERIALS CORP

Title:

SURFACE-COATED CUTTING TOOL

Document Type and Number:

WIPO Patent Application WO/2013/031952

Kind Code:

A1

Abstract:

Provided is a surface-coated cutting tool whereby a hard coated layer exhibits excellent peeling resistance and chipping resistance during high-speed heavy-duty cutting and high-speed intermittent cutting. A surface-coated cutting tool formed by vapor deposition of a hard coated layer having a Ti compound layer as a lower layer and an α-Al2O3 layer as an upper layer; and wherein 30%-70% of the Al2O3 crystal particles immediately above the lower layer comprise (11-20)-orientated Al2O3 crystal particles, at least 45% of all the Al2O3 crystal particles in the upper layer comprise (0001)-oriented Al2O3 crystal particles, and, ideally, the uppermost surface layer of the lower layer comprises an oxygen-containing TiCN layer containing oxygen at 0.5-3 at.% across only a region of a depth of up to 500 nm, and the ratio between the number of oxygen-containing TiCN crystal particles in the uppermost surface layer of the lower layer and the number of Al2O3 crystal particles in the interface between the lower and upper layers is 0.01-0.5.

Inventors:

TOMITA KOHEI (JP)
OSADA AKIRA (JP)

Application Number:

PCT/JP2012/072168

Publication Date:

March 07, 2013

Filing Date:

August 31, 2012

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP (JP)
TOMITA KOHEI (JP)
OSADA AKIRA (JP)

International Classes:

B23C5/16; B23B27/14; C23C16/30; C23C16/32; C23C16/34; C23C16/36; C23C16/40

Foreign References:

JP2010089201A	2010-04-22
JP2010207953A	2010-09-24
JP2007260851A	2007-10-11
JP3808648B2	2006-08-16
JP3291775B2	2002-06-10
JP2007152491A	2007-06-21
JPH068010A	1994-01-18

Other References: