CUTTING TOOL - SUMITOMO ELECTRIC HARDMETAL CORP

Title:

CUTTING TOOL

Document Type and Number:

WIPO Patent Application WO/2020/170571

Kind Code:

A1

Abstract:

A cutting tool comprising a substrate and a coating that coats the substrate, wherein: the coating comprises an α-alumina layer provided on the substrate; the α-alumina layer comprises α-alumina crystal grains; the α-alumina layer comprises a lower part and an upper part; when a color map is created on the basis of the crystal orientations of α-alumina crystal grains identified by using a field emission scanning microscope to perform electron backscatter diffraction analysis on a cross section obtained by cutting the α-alumina layer in a plane including the second interface normal, in the color map, the area ratio occupied by α-alumina crystal grains of which the normal of the (006) plane is within ±15° with respect to the direction of the aforementioned second interface normal is at least 50% in the upper part, and the area ratio occupied by α-alumina crystal grains of which the normal of the (110) plane is within ±15° with respect to the direction of the aforementioned second interface normal is at least 50% in the lower part; and the thickness of the α-alumina layer is 3-20μm.

Inventors:

OKUNO SUSUMU (JP)
IMAMURA SHINYA (JP)
RIKISO YUKI (JP)
KIDO YASUKI (JP)
KOBAYASHI FUMIYOSHI (JP)

Application Number:

PCT/JP2019/048723

Publication Date:

August 27, 2020

Filing Date:

December 12, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP (JP)

International Classes:

B23B27/14; B23B51/00; B23C5/16; C23C14/06; C23C14/08; C23C16/36; C23C16/40

Domestic Patent References:

WO2013031952A1

2013-03-07

Foreign References:

JP2013129030A	2013-07-04
JP2017071044A	2017-04-13
JP2013188833A	2013-09-26
JP2019027257A	2019-02-21
JP2004284003A	2004-10-14
JPH06316758A	1994-11-15

Other References: