Moldino Tool Engineering, Ltd.

Masakazu Isaka

Ryoutarou Fuwa

Ryotaro Fuwa

A coated cutting tool which has, on a surface of a substrate, a layer A of a face-centered cubic lattice structure which is a nitride or carbonitride containing 50 atom % or more of Al, 20 atom % or more of Cr, 85 atom % or more of Al and Cr, and 4 atom % or more and 15 atom % or less of Si, and a layer B provided on the layer A. The layer B is a nitride or carbon nitride which contains 70 atom % or more and 90 atom % or less of Ti, 5 atom % or more and 20 atom % or less of Si, and 1 atom % or more and 10 atom % or less of Nb or Cr in terms of a total amount of metal (including metalloid) elements, and has the face-centered cubic lattice structure.

Coated cutting tool

Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage, and at least Si and a nitride or carbonitride layer (c2) that contains 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content, and a layer (d) that is a nitride or carbonitride that contains, with respect to a total amount of metal elements (including metalloid elements), 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content percentage, the content percentage of Ti being 20 atom % or more.

Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more of Al, Cr having a second highest content percentage, and at least B and a nitride or carbonitride layer (c2) that contains 55 atom % or more of Al and Ti having a second highest content percentage, each layer having a film thickness of 50 nm or less. A peak intensity Ih ascribable to a hcp (010) plane of AlN in the layer (c) and the total peak intensity Is ascribable to a plurality of predetermined crystal phases satisfy a relationship of Ih×100/Is≤15.

Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage, and at least Si and a nitride or carbonitride layer (c2) that contains 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content percentage, each layer having a film thickness of 50 nm or less, and a layer (d) that is a nitride or carbonitride that contains, with respect to a total amount of metal elements (including metalloid elements), 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage.

Provided is a coated cutting tool, which includes a hard coating film containing a layer (c) which is a layered coating film made by alternately layering a nitride or carbonitride layer (c1) that contains, with respect to the total amount of metal elements (including metalloid elements), at least 55 atom % aluminum (Al), chromium (Cr) having the second highest content percentage, and at least silicon (Si), and a nitride or carbonitride layer (c2) that contains, with respect to the total amount of metal elements (including metalloid elements), at least 55 atom % aluminum (Al) and titanium (Ti) having the second highest content, each layer having a thickness of 50 nm or less. A peak intensity Ih ascribable to an hcp (010) plane of AlN in the layer (c) and the total peak intensity Is ascribable to other predetermined crystal phases satisfy a relationship of Ih&#xd7;100/Is&#x2264;15.

Growing community of inventors

Yasu, Japan

Masakazu Isaka