TOOL COMPONENT

• US 20100167044A1
• Filed: 02/28/2008
• Published: 07/01/2010
• Est. Priority Date: 02/28/2007
• Status: Abandoned Application

• Current Assignee: Cornelius Johannes Pretorius, Peter Michael Harden
• Original Assignee: Cornelius Johannes Pretorius, Peter Michael Harden
• Inventors: Pretorius, Cornelius Johannes, Harden, Peter Michael
• Application Number:
  US12/528,026
• Publication Number:
  US 20100167044A1
• Time in Patent Office: Days
• US Class Current: 428/335
• CPC Class Codes: B22F 2005/001 Cutting tools, earth boring or grinding tool other than table ware
• CPC Class Codes: B22F 2005/002 Tools other than cutting tools
• CPC Class Codes: B22F 7/06 of composite workpieces or articles from parts, e.g. to form tipped tools B22F7/002 takes precedence
• CPC Class Codes: B23B 2226/315 polycrystalline [PCD]
• CPC Class Codes: B23B 2228/10 Coatings
• CPC Class Codes: B23B 27/141 Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness with specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove, B23B27/1603; with removable plate-like milling cutting inserts of special shape B23C5/202
• CPC Class Codes: B23B 27/20 with diamond bits or cutting inserts
• CPC Class Codes: C22C 2204/00 End product comprising different layers, coatings or parts of cermet
• CPC Class Codes: C22C 26/00 Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
• CPC Class Codes: E21B 10/567 with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
• CPC Class Codes: Y10T 428/263 Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/264 Up to 3 mils

Abstract

The invention provides for a tool component comprising a layer of polycrystalline diamond (12) having a thickness of up to 100 microns and a working surface (16). A softer layer (20) containing a metal selected from molybdenum, tantalum and niobium is bonded to the working surface (16) of the polycrystalline diamond layer (12) along an interface. The metal of the softer layer (20) is in the form of the metal carbide, the metal or a combination thereof and is present in the region (22) of the layer of polycrystalline diamond (12) adjacent the interface.

Claims

1. A tool component comprising a layer of polycrystalline diamond having a working surface, a softer layer having a thickness of up to 100 microns and containing a metal selected from molybdenum, tantalum and niobium bonded to the working surface of the polycrystalline diamond layer along an interface, the metal of the softer layer being in the form of the metal carbide, the metal or a combination thereof and metal from the softer layer being present in the region of the layer of polycrystalline diamond adjacent the interface.

2. A tool component according to claim 1 wherein the softer layer covers a portion of the working surface only.

3. A tool component according to claim 1 wherein the softer layer covers the entire working surface.

4. A tool component according to any one of the preceding claims claim 1 wherein the working surface is a top surface of the layer of polycrystalline diamond which intersects a side surface defining a cutting edge for the tool component at the intersection.

5. A tool component according to claim 4 wherein the softer layer extends from the cutting edge across at least a portion of the working surface.

6. A tool component according to any one of the preceding claims claim 1 wherein the softer layer has a thickness of at least 50 microns.

7. A tool component according to any one of the preceding claims claim 1 wherein the softer layer consists predominantly of the metal in the form of the carbide and a minor amount of the metal, in metal form, and metal from the polycrystalline diamond.

8. A tool component according to claim 1 wherein the layer of polycrystalline diamond is bonded to a substrate.

9. A tool component according to claim 1 wherein the substrate is a cemented carbide substrate.

10-11. -11. (canceled)