Coated tool

Patent metadata

Field	Value
Publication number	US-12000034-B2
Application number	US-202117793674-A
Country	US
Kind code	B2
Filing date	Jan 18, 2021
Priority date	Jan 20, 2020
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A coated tool in a non-limiting embodiment of the present disclosure includes a base and a coating film located on the base. The coated tool includes a first surface, a second surface adjacent to the first surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface. The coating film includes an AlTiN film. The coating film has a first compressive stress σ11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ22 in a second direction which intersects with the first direction at an angle of 90°. The first compressive stress σ11 is different from the second compressive stress σ22.

First claim

What is claimed is:

1. A coated tool, comprising a base and a coating film located on the base,
the coated tool comprising:
a first surface,
a second surface adjacent to the first surface, and
a cutting edge located on at least a part of a ridge part of the first surface and the second surface,

wherein
the coating film comprises an AlTiN film;
the coating film has a first compressive stress σ 11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ 22 in a second direction which intersects with the first direction at an angle of 90°, and
the first compressive stress σ 11 is different from the second compressive stress σ 22 .

2. The coated tool according to claim 1 , wherein
the first compressive stress σ 11 is 1.05 times or more than the second compressive stress σ 22 .

3. The coated tool according to claim 1 , wherein
the first compressive stress σ 11 is 200-2000 MPa, and the second compressive stress σ 22 is 100-1500 MPa.

4. The coated tool according to claim 1 , wherein
the AlTiN film is represented by Al x Ti 1-x N, and x is 0.7 to 0.9.

5. The coated tool according to claim 1 , wherein
the first surface is a rake surface, and the second surface is a flank surface.

6. A method for making a coated tool, the method comprising:
providing a base of the coated tool, the base comprising: a first surface, a second surface adjacent to the first surface, and a cutting edge located on at least a part of a ridge part of the first surface and the second surface; and
forming a coating film using chemical vapor deposition on at least part of the base, the coating film comprising an AlTiN film with a first compressive stress σ 11 in a first direction which is parallel to a surface of the base and intersects with the cutting edge at an angle of 90°, and a second compressive stress σ 22 in a second direction which intersects with the first direction at an angle of 90°, wherein the first compressive stress σ 11 is larger than the second compressive stress σ 22 .

7. The method according to claim 6 , wherein the first compressive stress σ 11 is 1.05 times or more than the second compressive stress σ 22 .

8. The method according to claim 6 , wherein
the first compressive stress σ 11 is 200-2000 MPa, and the second compressive stress σ 22 is 100-1500 MPa.

9. The method according to claim 6 , wherein
the AlTiN film is represented by Al x Ti 1-x N, and x is 0.7 to 0.9.

10. The method according to claim 6 , wherein
the first surface is a rake surface, and the second surface is a flank surface.

11. The method according to claim 6 , wherein
when forming the coating layer using chemical vapor deposition, the coating layer is deposited by supplying a composition of a mixed gas in a direction intersecting with the cutting edge at approximately right angles.

12. The method according to claim 11 , wherein
the mixed gas is supplied at a velocity in a range of 5 m/s to 50 m/s.

13. The method according to claim 6 , wherein
when forming the coating layer using chemical vapor deposition, the coating layer is deposited by supplying a composition of a mixed gas in a direction approximately parallel to the cutting edge.

14. The method according to claim 13 , wherein
the mixed gas is supplied at a velocity in a range of 5 m/s to 50 m/s and a flow rate in a range of 10 L/min. to 100 L/min.

Assignees

• Kyocera Corp
• Univ Tokyo

Inventors

• Kubo Hayato
• Tanibuchi Takahito
• Shimogaki Yukihiro
• Momose Takeshi
• Deura Momoko

Classifications

• C23C14/0641 Primary

  Nitrides (C23C14/0617 takes precedence) · CPC title

• B23B27/14 Primary

  Cutting tools of which the bits or tips {or cutting inserts} are of special material · CPC title

• B23B2228/10

  Coatings · CPC title

• B23B2224/24

  Titanium aluminium nitride · CPC title

• B23C5/16

  characterised by physical features other than shape · CPC title