Coated cutting tool and a method of producing a coated cutting tool

Patent metadata

Field	Value
Publication number	US-9758859-B2
Application number	US-201514810113-A
Country	US
Kind code	B2
Filing date	Jul 27, 2015
Priority date	Jul 29, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The present disclosure relates to a coated cutting tool including a substrate and a coating disposed on the substrate, wherein the coating includes a layer of Ti x Zr y Al (1-x-y) N, where 0<x≦0.3, 0.2≦y≦0.8 and 0.1≦(1-x-y)≦0.7. The disclosure further relates to a method of producing such a coated cutting tool, and to a cutting insert forming a coated cutting tool.

First claim

What is claimed is:

1. A coated cutting tool comprising a substrate and a coating disposed on the substrate, wherein the coating includes one layer of TixZryAl(1-x-y)N where 0<x≦0.3, 0.4<y≦0.8 and 0.1≦(1-x-y)≦0.7.

2. The coated cutting tool according to claim 1 , wherein x≧0.05.

3. The coated cutting tool according to claim 1 , wherein x≦0.25.

4. The coated cutting tool according to claim 1 , wherein y≦0.6.

5. The coated cutting tool according to claim 1 , wherein the layer of TixZryAl(1-x-y)N has a cubic crystal structure.

6. The coated cutting tool according to claim 1 , wherein the layer of TixZryAl(1-x-y)N has a columnar microstructure.

7. The coated cutting tool according to claim 1 , wherein an X ray diffractogram of the layer of TixZryAl(1-x-y)N has a dominant peak of a (200) plane.

8. The coated cutting tool according to claim 1 , wherein the layer of TixZryAl(1-x-y)N is deposited by PVD, such as arc evaporation or sputtering.

9. The coated cutting tool according to claim 1 , wherein the coating includes an adhesion layer and the layer of TixZryAl(1-x-y)N is disposed on top of the adhesion layer.

10. The coated cutting tool according to claim 1 , wherein the coating has an adhesion of at least 50 kg, at least 100 kg, or at least 150 kg, as evaluated from a Rockwell indentation test.

11. The coated cutting tool according to claim 1 , wherein the coating has a thickness of more than 0.5 μm.

12. The coated cutting tool according to claim 1 , wherein the layer of TixZryAl(1-x-y)N has a thickness of more than 5 nm.

13. The coated cutting tool according to claim 1 , wherein the substrate comprises cemented carbide or polycrystalline cubic boron nitride.

14. The coated cutting tool according to claim 1 , wherein 0.1≦x≦0.3.

15. The coated cutting tool according to claim 1 , wherein 0.2≦x≦0.3.

16. The coated cutting tool according to claim 1 , wherein 0.6≦y≦0.8.

17. The coated cutting tool according to claim 1 , wherein the layer of TixZryAl(1-x-y)N has a thickness of less than 20 μm.

18. A coated cutting tool comprising a substrate and a coating deposited on the substrate, wherein the coating comprises layers of TixZryAl(1-x-y)N where 0<x≦0.3, 0.2≦y≦0.8 and 0.1≦(1-x-y)≦0.7, and wherein the coating is a multilayer coating and the TixZryAl(1-x-y)N layers alternate with one or more layers selected from the group of TiN, TiAlN, TiSiN, TiSiCN, TiCrAlN, and CrAlN, or combinations thereof.

19. The coated cutting tool according to claim 18 , wherein 0.2≦y≦0.4.

20. The coated cutting tool according to claim 18 , wherein 0.3≦y≦0.8 or 0.4≦y≦0.8.

21. The coated cutting tool according to claim 18 , wherein 0.6≦y≦0.8.

22. The coated cutting tool according to claim 18 , wherein the coating has a thickness of less thans 20 μm.

Assignees

• Sandvik Intellectual Property
• Sandvik Intellectual Property

Inventors

• Johnson Lars
• Pilemalm Robert
• Rogstrom Lina

Classifications

• B23B27/148

  Composition of the cutting inserts · CPC title

• B23B2222/28

  Details of hard metal, i.e. cemented carbide · CPC title

• C23C28/042

  including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides · CPC title

• C23C28/347

  with layers adapted for cutting tools or wear applications · CPC title

• B23B2228/08

  applied by physical vapour deposition [PVD] · CPC title