Super hard constructions & methods of making same

Patent metadata

Field	Value
Publication number	US-2019017330-A1
Application number	US-201616066469-A
Country	US
Kind code	A1
Filing date	Dec 19, 2016
Priority date	Dec 31, 2015
Publication date	Jan 17, 2019
Grant date	—

Abstract

A super hard construction comprises a substrate comprising a peripheral surface, an interface surface and a longitudinal axis extending in a plane and a super hard material layer formed over the substrate and having an exposed outer surface, a peripheral surface extending therefrom and an interface surface. One of the interface surface of the substrate or the interface surface of the super hard material layer comprises one or more projections arranged to project from the interface surface, the one or more projections being spaced from the peripheral surface of the substrate and a peripheral flange extending between the peripheral side edge and the interface surface. The peripheral flange is inclined at an angle of between around 5 degrees to around 30 degrees to a plane substantially perpendicular to the plane through which the longitudinal axis extends.

First claim

1 . A super hard construction comprising:
a substrate comprising a peripheral surface, an interface surface and a longitudinal axis extending in a plane; and a super hard material layer formed over the substrate and having an exposed outer surface, a peripheral surface extending therefrom and an interface surface; wherein one of the interface surface of the substrate or the interface surface of the super hard material layer comprises: one or more projections arranged to project from the interface surface; the one or more projections being spaced from the peripheral surface of the substrate; and a peripheral flange extending between the peripheral side edge and the interface surface, the peripheral flange being inclined at an angle of between around 5 degrees to around 30 degrees to a plane substantially perpendicular to the plane through which the longitudinal axis extends.

2 . The super hard construction of claim 1 , wherein the peripheral flange is substantially concentric with the substrate.

3 . The super hard construction of claim 1 , wherein the flange extends to the peripheral side edge.

4 . The super hard construction of claim 1 , wherein the flange is spaced from the peripheral side edge.

5 . The super hard construction of claim 4 , wherein the flange is spaced from the peripheral side edge by a shoulder portion, the shoulder portion extending a radial distance of between around 0.2 to around 0.8 mm from the peripheral side edge in a plane substantially perpendicular to the plane through which the longitudinal axis of the substrate extends.

6 . The super hard construction of claim 1 , wherein the thickness of the super hard material layer about the central longitudinal axis of the substrate is substantially the same as the thickness of the super hard material layer at the peripheral surface.

7 . The super hard construction of claim 1 , wherein the super hard material layer comprises polycrystalline diamond.

8 . The super hard construction of claim 4 , wherein the flange is spaced from the peripheral side edge by a shoulder portion, the shoulder portion extending a radial distance of between around 0.3 to around 0.5 mm from the peripheral side edge in a plane substantially perpendicular to the plane through which the longitudinal axis of the substrate extends.

9 . The super hard construction of claim 1 , wherein the interface surface of the substrate is a negative or reversal of the interface surface of the super hard material layer such that the two interface surfaces form a matching fit.

10 . The super hard construction of claim 1 , wherein the super hard construction is a cutter element.

11 . The super hard construction of claim 1 , wherein the projections are arranged such that there is reflective symmetry along a plane though the central axis.

12 . The super hard construction of claim 1 , the angle at which the peripheral flange is inclined to the plane substantially perpendicular to the plane through which the longitudinal axis extends is between around 5 degrees to around 20 degrees.

13 . The super hard construction of claim 1 , the angle at which the peripheral flange is inclined to the plane substantially perpendicular to the plane through which the longitudinal axis extends is between around 5 degrees to around 15 degrees.

14 . The super hard construction of claim 1 , the angle at which the peripheral flange is inclined to the plane substantially perpendicular to the plane through which the longitudinal axis extends is between around 5 degrees to around 10 degrees.

15 . An earth boring drill bit comprising a body having the super hard construction of claim 1 mounted thereon as a cutter element.

16 . A method of forming the super hard construction of any one of claim 1 .

17 . (canceled)

Assignees

• Element Six Uk Ltd

Inventors

• Bowes David Christian

Classifications

• B22F2005/001

  Cutting tools, earth boring or grinding tool other than table ware · CPC title

• E21B10/5735

  Interface between the substrate and the cutting element · CPC title

• B22F2302/253

  Aluminum oxide (Al2O3) · CPC title

• B22F3/1103

  with particular physical characteristics · CPC title

• E21B10/08 Primary

  Roller bits (E21B10/26 takes precedence; roller core bits E21B10/06; characterised by wear resisting parts E21B10/50) · CPC title