# US 12,215,061 B2 · Insert and cutting tool

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- Number: US 12,215,061 B2
- Document ID: US12215061B2
- Status: Granted
- Kind: B2
- Application number: 17/622,714
- Filed: 2020-06-24
- Published: 2022-08-18
- Granted: 2025-02-04
- Earliest claimed: 2019-06-27
- Assignees: KYOCERA Corporation
- Applicants: Kyocera Corporation
- Inventors: Futoshi Isobe; Azusa Hagihara
- Web page: https://patentgrep.com/patent/US12215061B2

## CPC

- C04B 35/5831: based on cubic boron nitrides {or Wurtzitic boron nitrides, including crystal structure transformation of powder}
- B23B 27/1611: {characterised by having a special shape}
- C04B 35/645: Pressure sintering
- B23B 27/148: {Composition of the cutting inserts}
- B23B 2226/12: Boron nitride
- C04B 2235/386: Boron nitrides
- C04B 2235/5436: micrometer sized, i.e. from 1 to 100 micron
- C04B 2235/5445: submicron sized, i.e. from 0,1 to 1 micron
- C04B 2235/602: Making the green bodies or pre-forms by moulding
- C04B 2235/762: Cubic symmetry, e.g. beta-SiC
- C04B 2235/767: Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites
- C04B 2235/781: Nanograined materials, i.e. having grain sizes below 100 nm
- C04B 2235/785: Submicron sized grains, i.e. from 0,1 to 1 micron
- C04B 2235/80: Phases present in the sintered or melt-cast ceramic products other than the main phase
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)

## Abstract

An insert of the present disclosure includes a boron nitride sintered body including a first surface. In a transmission X-ray diffraction of a cross section of the boron nitride sintered body vertical to the first surface, X-ray intensity at a top of a 111 diffraction peak of cubic boron nitride in a direction vertical to the first surface is IcBN(111)v. X-ray intensity at a top of a 002 diffraction peak of compressed boron nitride is IhBN(002)v. X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride in a direction parallel to the first surface is IcBN(111)h. X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is IhBN(002)h. A compressed boron nitride content value obtained from these X-ray intensities is larger than 0.005. A cubic orientation value is larger than 0.5, and a compressed boron nitride orientation value is larger than the cubic orientation value.

## Claims

### Claim 1

An insert, comprising:
a boron nitride sintered body comprising a first surface, a second surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface,
the boron nitride sintered body comprising cubic boron nitride and compressed boron nitride,
wherein
in a transmission X-ray diffraction of a cross section of the boron nitride sintered body vertical to the first surface,
in a direction vertical to the first surface
X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride is IcBN(111)v, and X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is IhBN(002)v, and
in a direction parallel to the first surface
X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride is IcBN(111)h, and X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is IhBN(002)h,
a compressed boron nitride content value indicated by
(IhBN(002)v+IhBN(002)h)/(IcBN(111)v+IcBN(111)h) is larger than 0.002 and smaller than 0.01,
a cubic orientation value indicated by IcBN(111)v/(IcBN(111)v+IcBN(111)h) is larger than 0.5, and
a compressed boron nitride orientation value indicated by
IhBN(002)v/(IhBN(002)v+IhBN(002)h) is larger than the cubic orientation value.

### Claim 2 (depends on 1)

The insert according to claim 1, wherein the cubic orientation value is 0.55 or more.

### Claim 3 (depends on 1)

The insert according to claim 1, wherein the compressed boron nitride orientation value is 0.8 or more.

### Claim 4 (depends on 1)

The insert according to claim 1, wherein the boron nitride sintered body comprises Wurtzite boron nitride.

### Claim 5 (depends on 1)

The insert according to claim 1, wherein a mean particle diameter of the cubic boron nitride in the cross section is 200 nm or less.

### Claim 6 (depends on 1)

A cutting tool, comprising:
a holder having a length from a first end to a second end and comprising a pocket on a side of the first end; and
the insert according to claim 1, the insert being located in the pocket.