Coated cutting tool

Patent metadata

Field	Value
Publication number	US-12467126-B2
Application number	US-202017622376-A
Country	US
Kind code	B2
Filing date	Jun 24, 2020
Priority date	Jun 28, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

The present coated cutting tool includes a substrate with a coating including a layer of Ti x Al y Cr z Si v N, where x is 0.30-0.50, y is 0.25-0.45, z is 0.05-0.15, and v is 0.10-0.20, x+y+z+v=1. The layer has a cubic phase with a distribution of unit cell lengths within the range 3.96 to 4.22 Å for the cubic cell. The unit cell length range 3.96 to 4.22 Å includes more than one intensity maximum in an averaged radial intensity profile of an electron diffraction pattern.

First claim

The invention claimed is:

1 . A coated cutting tool comprising a substrate with a coating, the coating having a layer of Ti x Al y Cr z Si v N, wherein x is 0.30-0.50, y is 0.25-0.45, z is 0.05-0.15, and v is 0.10-0.20, and wherein x+y+z+v=1, the layer of Ti x Al y Cr z Si v N including a cubic phase, wherein the cubic phase has a distribution of unit cell lengths within the range 3.96 to 4.22 Å per cubic cell and, which within a unit cell length range 3.96 to 4.22 Å includes more than one intensity maximum in an averaged radial intensity profile of an electron diffraction pattern.

2 . The coated cutting tool according to claim 1 , wherein the cubic phase within the unit cell length range 3.96 to 4.22 Å includes from two to four intensity maxima in the averaged radial intensity profile of the electron diffraction pattern.

3 . The coated cutting tool according to claim 1 , wherein the cubic phase within the unit cell length range 3.96 to 4.22 Å includes three intensity maxima in the averaged radial intensity profile of the electron diffraction pattern, the maxima being situated within the ranges 4.00-4.04 Å, 4.06-4.10 Å and 4.12-4.16 Å, respectively.

4 . The coated cutting tool according to claim 1 , wherein the layer of Ti x Al y Cr z Si v N has a hardness of from 3300 to 3700 HV.

5 . The coated cutting tool according to claim 1 , wherein the layer of Ti x Al y Cr z Si v N has a reduced Young's modulus of ≥320 GPa.

6 . The coated cutting tool according to claim 1 , wherein the layer of Ti x Al y Cr z Si v N has a residual stress of from −3 to −6 GPa.

7 . The coated cutting tool according to claim 1 , wherein the layer of Ti x Al y Cr z Si v N has a thermal conductivity of less than 3 W/mK.

8 . The coated cutting tool according to claim 1 , wherein a thickness of the layer of Ti x Al y Cr z Si v N is from 0.5 to 6 μm.

9 . The coated cutting tool according to claim 1 , wherein there is at least one metal nitride layer between the substrate and the layer of Ti x Al y Cr z Si v N.

10 . The coated cutting tool according to claim 9 , wherein there is a layer of (Ti,Al)N between the substrate and the layer of Ti x Al y Cr z Si v N.

11 . The coated cutting tool according to claim 1 , wherein the substrate is selected from cemented carbide, cermet, cBN, ceramics, PCD and HSS.

12 . The coated cutting tool according to claim 1 , wherein the layer of Ti x Al y Cr z Si v N is a HIPIMS (High Power Impulse Magnetron Sputtering)-deposited layer.

Assignees

• Walter Ag

Inventors

• Engelhart Wolfgang
• Schier Veit

Classifications

• C23C30/005 Primary

  on hard metal substrates · CPC title

• C23C14/35

  by application of a magnetic field, e.g. magnetron sputtering {(C23C14/3457 takes precedence)} · CPC title

• B22F2005/001

  Cutting tools, earth boring or grinding tool other than table ware · CPC title

• B22F7/06

  of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} · CPC title

• C23C14/3485

  using pulsed power to the target · CPC title