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Thermally stable polycrystalline diamond with polycrystalline cubic boron nitride transition layer

A polycrystalline diamond and cube technology, which can be used in manufacturing tools, earth-moving drilling, metal processing equipment, etc., and can solve problems such as easy thermal degradation.

Inactive Publication Date: 2017-12-05
SMITH INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A known problem with conventional PCD bodies is that they are prone to thermal degradation when exposed to elevated temperatures
However, it is difficult to form a bond between the thermally stable PCD material and the substrate for attachment to cutting tools

Method used

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  • Thermally stable polycrystalline diamond with polycrystalline cubic boron nitride transition layer
  • Thermally stable polycrystalline diamond with polycrystalline cubic boron nitride transition layer
  • Thermally stable polycrystalline diamond with polycrystalline cubic boron nitride transition layer

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Embodiment Construction

[0017] The present disclosure relates to cutting tools comprising polycrystalline diamond material for subterranean drilling applications, and more particularly, to a thermally stable polycrystalline diamond (PCD) body bonded to a substrate to form a cutting element. In one embodiment, the thermally stable PCD material may be non-metal catalyst PCD, or binder-free PCD. The PCD body is bonded to the carbide substrate through a polycrystalline cubic boron nitride (PCBN) transition layer. The PCBN transition layer provides bonding with both the thermally stable PCD body and the carbide matrix.

[0018] The following disclosure refers to various embodiments. The disclosed embodiments have broad applicability, and the discussion of any embodiment is illustrative of that embodiment only, and is not meant to imply that the scope of the disclosure, including the claims, is to be limited to that embodiment or features of that embodiment.

[0019] Throughout the following specificatio...

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Abstract

The present disclosure relates to cutting tools comprising polycrystalline diamond bodies for subterranean drilling applications, and more particularly, to a thermally stable polycrystalline diamond body bonded to a substrate to form a cutting element. The thermally stable polycrystalline diamond body may be binder-free polycrystalline diamond or non-metallic catalyst polycrystalline diamond. Also provided is a polycrystalline cubic boron nitride layer bonded to the polycrystalline diamond body on one side and to the substrate on the other side.

Description

Background technique [0001] Superhard materials are commonly used in cutting tools and rock drilling tools. Polycrystalline diamond material is one such superhard material and is known for its good wear resistance and hardness, making it ideal for cutting tools such as those used in machining and in underground mining and drilling. The material of choice for industrial applications of components. [0002] To form polycrystalline diamond, diamond particles are sintered at high pressure and high temperature (HPHT sintering) to produce a superhard polycrystalline structure. The catalyst material is added to the diamond particle mixture prior to sintering and / or infiltrated during sintering to enhance the intergrowth of diamond crystals during HPHT sintering to form a polycrystalline diamond (PCD) structure. The metals typically used as catalysts are selected from the group of solvent metal catalysts selected from Group VIII of the Periodic Table of the Elements, including cobal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46B24D3/10
CPCB22F7/06C22C26/00E21B10/56B22F2005/001Y10T156/10Y10T83/929E21B10/46
Inventor Y·鲍
Owner SMITH INT INC