DIAMOND COATED TOOL

• US 20140341664A1
• Filed: 11/27/2012
• Published: 11/20/2014
• Est. Priority Date: 01/10/2012
• Status: Abandoned Application

• Current Assignee: Sumitomo Electric Hardmetal Corp (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Hardmetal Corp (Sumitomo Corporation)
• Inventors: Meguro, Kiichi
• Application Number:
  US14/364,660
• Publication Number:
  US 20140341664A1
• Time in Patent Office: Days
• US Class Current: 407/119
• CPC Class Codes: B23B 2226/315 polycrystalline [PCD]
• CPC Class Codes: B23B 2228/10 Coatings
• CPC Class Codes: B23B 27/20 with diamond bits or cutting inserts
• CPC Class Codes: B23B 51/00 Tools for drilling machines
• CPC Class Codes: B23C 2226/315 polycrystalline [PCD]
• CPC Class Codes: B23C 2228/10 Coating
• CPC Class Codes: B23C 5/16 characterised by physical features other than shape
• CPC Class Codes: C23C 16/0254 Physical treatment to alter the texture of the surface, e.g. scratching or polishing
• CPC Class Codes: C23C 16/271 using hot filaments
• CPC Class Codes: C23C 16/277 using other elements in the gas phase besides carbon and hydrogen; using other elements besides carbon, hydrogen and oxygen in case of use of combustion torches; using other elements besides carbon, hydrogen and inert gas in case of use of plasma jets
• CPC Class Codes: Y10T 407/27 comprising tool of specific chemical composition

Abstract

A diamond coated tool according to the present invention includes a base material, and a diamond layer coating a surface of the base material, the diamond layer containing a diamond, 1.0×10¹⁸ to 1.0×10²² atoms/cm³ of boron, and 1.0×10¹⁷ to 1.0×10²¹ atoms/cm³ of nitrogen.

Claims

1. A diamond coated tool comprising:

a base material; and

a diamond layer coating a surface of said base material,

said diamond layer containing a diamond, 1.0×

10¹⁸ to 1.0×

10²² atoms/cm³ of boron, and 1.0×

10¹⁷ to 1.0×

10²¹ atoms/cm³ of nitrogen.

2. The diamond coated tool according to claim 1, wherein

said diamond layer has a residual compressive stress of 500 to 2500 MPa on a surface thereof according to X-ray stress measurement.

3. The diamond coated tool according to claim 1, wherein

said diamond layer has a maximum particle size of 0.05 to 3 μ

m of diamond particles on said surface thereof.

4. The diamond coated tool according to claim 1, wherein

said diamond layer contains 3.0×

10¹⁹ to 3.0×

10²¹ atoms/cm³ of boron.

5. The diamond coated tool according to claim 1, wherein

said diamond layer contains 1.0×

10¹⁸ to 1.0×

10²⁰ atoms/cm³ of nitrogen.

6. The diamond coated tool according to claim 1, wherein

said diamond layer has a residual compressive stress of 800 to 2000 MPa on said surface thereof according to X-ray stress measurement.

7. The diamond coated tool according to claim 1, wherein

said base material is made of a cemented carbide.

8. The diamond coated tool according to claim 1, wherein

said surface of said base material has an arithmetic mean roughness Ra of 0.1 to 10 μ

m and a mean length RSm of roughness profile elements of 1 to 100 μ

m.

9. The diamond coated tool according to claim 1, wherein

said diamond layer has a thickness of 0.1 to 30 μ

m.