Polycrystalline cubic boron nitride material

Patent metadata

Field	Value
Publication number	US-12312277-B2
Application number	US-202117791391-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Jan 31, 2020
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

This disclosure relates to a high cBN content polycrystalline cubic boron nitride, PCBN, material. The binder matrix material comprises 19 to 50 wt. % chromium, or a compound thereof.

First claim

The invention claimed is:

1. A polycrystalline cubic boron nitride, PCBN, material comprising:
between 70 and 95 vol. % cubic boron nitride, cBN, particles;
a binder matrix material in which the cBN particles are dispersed, the content of the binder matrix material being between 5 vol. % and 30 vol. % of the PCBN material;
the binder matrix material comprising a ceramic constituent and at least 50 vol. % of a metal constituent,
the ceramic constituent comprising titanium diboride (TiB 2 ),
the metal constituent comprising chromium (Cr), or a compound thereof, in an amount of 19 to 50 wt. % of the binder matrix material,
wherein the metal constituent further comprises vanadium (V) present in an amount of 15 to 50 wt. % of the binder matrix material.

2. The PCBN material as claimed in claim 1 , wherein Cr is present in an amount of 19 to 40 wt. % of the binder matrix material.

3. The PCBN material as claimed in claim 1 , wherein Cr is present in an amount of 19 to 30 wt. % of the binder matrix material.

4. The PCBN material as claimed in claim 1 , wherein Cr is present in an amount of 20 to 30 wt. % of the binder matrix material.

5. The PCBN material as claimed in claim 1 , wherein Cr is present in an amount of 30 to 40 wt. % of the binder matrix material.

6. The PCBN material as claimed in claim 1 , wherein the TiB 2 is present in an amount of 2 to 10 wt. % of the binder matrix material.

7. The PCBN material as claimed in claim 1 , wherein the TiB 2 is present in an amount of 2 to 5 wt. % of the binder matrix material.

8. The PCBN material as claimed in claim 1 , comprising between 75 and 92 vol. % cBN particles.

9. The PCBN material as claimed in claim 1 , comprising between 80 and 93 vol. % cBN particles.

10. The PCBN material as claimed in claim 1 , wherein V is present in an amount of 15 to 20 wt. % of the binder matrix material.

11. The PCBN material as claimed in claim 1 , wherein V is present in an amount of 20 to 30 wt. % of the binder matrix material.

12. The PCBN material as claimed in claim 1 , wherein V is present in an amount of 30 to 40 wt. % of the binder matrix material.

13. The PCBN material as claimed in claim 1 , the binder matrix material further comprising aluminium or a compound thereof and/or titanium or a compound thereof.

14. The PCBN material as claimed in claim 13 , wherein aluminium, Al, or a compound thereof, is present in amount of between 2 and 15 vol. % of the binder matrix material.

15. A tool comprising PCBN material as claimed in claim 1 , for use in machining titanium, an alloy or a compound thereof.

16. A method of using a tool as claimed in claim 15 , the method comprising machining an alloy or compound comprising titanium using the tool.

17. The method as claimed in claim 16 , wherein the alloy or compound comprising titanium is Ti6Al4V.

18. The method as claimed in claim 16 , wherein a cutting speed, Vc, of the tool is 150 to 300 m/min.

Assignees

• Element Six Uk Ltd
• Seco Tools Ab

Inventors

• Lindvall Rebecka
• Can Antionette
• M'Saoubi Rachid
• Lenrick Filip Ernst
• Bushlya Volodymyr
• Staahl Jan-Eric

Classifications

• C22C1/1084

  by mechanical alloying (blending, milling) · CPC title

• C22C1/1068

  Making hard metals based on borides, carbides, nitrides, oxides or silicides · CPC title

• C22C26/00

  Alloys containing diamond {or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes} · CPC title

• B23B2226/125

  cubic [CBN] · CPC title

• B23B27/148

  Composition of the cutting inserts · CPC title