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Superhard constructions and methods of making same

A component and superhard technology, applied in diamond, construction and other directions, can solve the problem of short working life of cutting components with superhard material layer

Inactive Publication Date: 2016-11-02
ELEMENT SIX LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems can lead to early failure of the superhard material layer and shorter working life of the cutting element

Method used

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  • Superhard constructions and methods of making same
  • Superhard constructions and methods of making same
  • Superhard constructions and methods of making same

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Embodiment Construction

[0024] In the embodiments described herein, when it is described that protrusions or depressions are formed on the surface of the substrate, it should be understood that they may instead be formed on the surface of the superhard material layer interfacing with the interface surface of the substrate, and on the surface of the substrate form the opposite characteristics. Additionally, it should be understood that the opposite or inverse of the interface surface is formed on the layer of superhard material that interfaces with the substrate such that the two interfaces form a snug fit.

[0025] As used herein, "superhard material" refers to a material having a Vickers hardness of at least about 28 GPa. Examples of superhard materials are diamond and cubic boron nitride (cBN) materials.

[0026] As used herein, "superhard component" refers to a component comprising a body of polycrystalline superhard material and a substrate to which it is attached.

[0027] Polycrystalline diam...

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PUM

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Abstract

A superhard construction comprises a substrate (10) comprising a peripheral surface, an interface surface (18) and a longitudinal axis and a super hard material layer (12) formed over the substrate and having an exposed outer surface forming a working surface (14), 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 (24, 26) arranged to project from the interface surface, the height of the one or more projections being between around 0.2mm to around 1.0mm measured from the lowest point on the interface surface from which the one or more projections extend.

Description

technical field [0001] The present invention relates to superhard constructions and methods of manufacture thereof, particularly but not exclusively to structures comprising polycrystalline diamond (PCD) bonded to a substrate for use as cutting inserts or earth-boring bit elements. Background technique [0002] Polycrystalline superhard materials such as polycrystalline diamond (PCD) and polycrystalline cubic boron nitride (PCBN) can be used in many tools for cutting, machining, drilling or breaking hard solid or abrasive materials such as rocks, metals, ceramics, composites and wood-containing materials. In particular, tool inserts in the form of cutting elements comprising PCD material are widely used in drill bits for drilling the earth to extract oil or gas. The working life of a superhard tool insert is limited by fracture of the superhard material, including by spalling and chipping, or by wear of the tool insert. [0003] Cutting elements such as those used in rock ...

Claims

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Application Information

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IPC IPC(8): E21B10/573B22F7/06C22C26/00
CPCB22F7/06C22C26/00E21B10/5735B22F2005/001C01B32/25B22F5/00B22F7/08
Inventor 罗杰·威廉·奈杰尔·尼伦尼德雷特·卡恩汉弗莱·塞斯比大卫·鲍斯德里克·尼尔姆斯
Owner ELEMENT SIX LTD