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Polycrystalline diamond compact and preparation method thereof

A polycrystalline diamond and composite sheet technology, applied in chemical instruments and methods, earthwork drilling, drilling equipment and other directions, can solve problems such as cracking, affecting the service life of polycrystalline diamond composite sheets, and avoid failure, prevent continued expansion, The effect of high wear resistance

Active Publication Date: 2013-05-01
SHENZHEN HAIMINGRUN SUPERHARD MATERIALS
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  • Abstract
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Problems solved by technology

However, connecting the interface with geometric forms such as steps, grooves or convex-concaves does not change the difference in the properties of the two materials, the polycrystalline diamond layer and the cemented carbide layer.
After high temperature and high pressure synthesis, it is easy to have a high degree of localized stress concentration at the interface, which will lead to sudden failure and rupture, affecting the service life of the polycrystalline diamond compact

Method used

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  • Polycrystalline diamond compact and preparation method thereof
  • Polycrystalline diamond compact and preparation method thereof

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Please refer to the attached figure 1 As shown, the embodiment of the present invention provides a polycrystalline diamond compact, comprising a cemented carbide matrix layer 1 and a polycrystalline diamond layer 2; The wear-resistant area and the impact-resistant area 4 composed of cobalt-rich polycrystalline diamond, and the cobal...

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Abstract

The invention provides a polycrystalline diamond compact and a preparation method thereof, and aims to improve abrasive resistance and impact resistant endurance of the polycrystalline diamond compact, and then the service life of the polycrystalline diamond compact and the continuous work efficiency are improved. In order to achieve the purpose, the technical scheme adopted by the invention is that the polycrystalline diamond compact comprises a hard alloy matrix layer and a polycrystalline diamond layer, wherein the polycrystalline diamond layer comprises an abrasive resistant region and an impact resistant region, the abrasive resistant region comprises cobalt-less polycrystalline diamond particles, the impact resistant region comprises cobalt-enriched polycrystalline diamond particles, and the cobalt-less polycrystalline diamond particles are distributed in the impact resistant region. According to the polycrystalline diamond compact provided by the invention, the abrasive resistant region which comprises the cobalt-less polycrystalline diamond particles is formed by fully sintering fine-grained diamond particles, so that the extremely high abrasive resistance of the polycrystalline diamond compact is guaranteed; and moreover, the cobalt-enriched polycrystalline diamond region has extremely good impact toughness due to the high cobalt metal content.

Description

technical field [0001] The invention relates to the technical field of superhard materials, more specifically, to a polycrystalline diamond composite sheet, and also relates to a preparation method of the polycrystalline diamond composite sheet. Background technique [0002] The diamond composite sheet is made by adding a certain binder to the diamond powder and assembling it with the cemented carbide matrix, and then sintering it on a special diamond hydraulic press under ultra-high pressure and high temperature conditions. It consists of a polycrystalline diamond layer and a cemented carbide substrate. Due to the high hardness and good wear resistance of the polycrystalline diamond layer, coupled with the good toughness and weldability of the cemented carbide substrate, it is widely used in oil drilling, geological drilling and coal mining applications. A high-performance polycrystalline diamond must have high wear resistance and good impact toughness. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): B32B15/04B32B9/00E21B10/46B22F7/06
Inventor 孔利军王堃刘春华
Owner SHENZHEN HAIMINGRUN SUPERHARD MATERIALS
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