# US 10,370,758 B2 · Coated tool

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- Number: US 10,370,758 B2
- Document ID: US10370758B2
- Status: Granted
- Kind: B2
- Application number: 15/511,723
- Filed: 2015-09-24
- Published: 2017-09-28
- Granted: 2019-08-06
- Earliest claimed: 2014-09-24
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Yoshikazu Kodama; Kensaku Watanabe; Takahito Tanibuchi
- Web page: https://patentgrep.com/patent/US10370758B2

## CPC

- C23C 16/06: characterised by the deposition of metallic material
- C23C 16/0272: {Deposition of sub-layers, e.g. to promote the adhesion of the main coating}
- C23C 16/36: Carbonitrides
- C23C 16/403: {of aluminium, magnesium or beryllium}
- C23C 16/405: {of refractory metals or yttrium}
- C23C 16/44: characterised by the method of coating (C23C16/04 takes precedence)
- C23C 16/56: After-treatment
- C23C 28/042: {including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides}
- C23C 28/044: {coatings specially adapted for cutting tools or wear applications}
- C23C 28/42: {characterized by the composition of the alternating layers}
- C23C 30/005: {on hard metal substrates}
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)

## Abstract

A coated tool is, for example, a cutting tool which is provided with a base material and a coating layer located on the base material, wherein a cutting edge and a flank surface are located on the coating layer, the coating layer has a portion in which at least a titanium carbonitride layer and an aluminum oxide layer having an α-type crystal structure are laminated in this order, and, with regard to a texture coefficient (Tc) (hkl) which is calculated on a basis of a peak of the aluminum oxide layer analyzed by an X-ray diffraction analysis, a texture coefficient (Tc1) (4_0_10) as measured from a surface side of the aluminum oxide layer in the flank surface is 0.6 or more.

## Claims

### Claim 1

A coated tool comprising,
a base material comprising a first surface and a second surface; and
coating layers located over the base material and comprising,
a first layer including titanium carbonitride and located over the base material, and
a second layer including aluminum oxide having an alpha-type crystal structure and located over the first layer; wherein
the second layer comprises a first portion located over the first surface and a second portion located over the second surface, and
a texture coefficient Tc1 (4_0_10) as measured on an outermost surface of the first portion is 0.6 or more, wherein the texture coefficient Tc (hkl) is a value expressed by the formula shown below on the basis of a peak of the second layer analyzed by an X-ray diffraction analysis:
a texture coefficient Tc(hkl)={I(hkl)/I0(hkl)}/[(1/8)×τ{I(HKL)/I0(HKL)}]
wherein (HKL) represents a crystal face (012), (104), (110), (113), (024), (116), (214), (146) or (4_0_10);
each of I(HKL) and I(hkl) represents a peak intensity of a peak which is attributed to each crystal face and is detected by an X-ray diffraction analysis of the second layer; and
each of I0(HKL) and I0(hkl) represents a reference diffraction intensity of each crystal face contained in a JCPDS card No. 00-010-0173.

### Claim 2 (depends on 1)

The coated tool according to claim 1, wherein a texture coefficient Tc2 (4_0_10) is smaller than the Tc1 (4_0_10), wherein the texture coefficient Tc2 (4_0_10) is measured on a surface of the first portion in which 10-40 percent of a thickness of the first portion is removed by polishing.

### Claim 3 (depends on 1)

The coated tool according to claim 1, wherein one of I(116) and I(104) is the first most-intense peak and another one of I(104) and I(116) is the second most-intense peak among surface side peaks detected in measurement from above the top surface of the first portion.

### Claim 4 (depends on 1)

The coated tool according to claim 1, wherein a texture coefficient Tc3 (4_0_10) which is measured on an outermost surface of the second portion is larger than a texture coefficient Tc1 (4_0_10) which is measured from above the top surface of the first portion.

### Claim 5 (depends on 1)

The coated tool according to claim 1, wherein a texture coefficient Tc3 (104) which is measured on the outermost surface of the second portion is smaller than a texture coefficient Tc1 (104) which is measured from above the top surface of the first portion.

### Claim 6 (depends on 1)

The coated tool according to claim 1, wherein the top surface of the first portion comprises a flank surface.

### Claim 7 (depends on 1)

The coated tool according to claim 1, wherein a top surface of the second portion comprises a rake surface.