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Polycrystalline diamond composite sheet and treatment method thereof

A technology of polycrystalline diamond and composite sheet, which is applied in earth drilling, metal processing equipment, turning equipment, etc. It can solve problems such as difficult leaching, low efficiency, and unsuitability for large-scale operations, and achieves improved stability and removal Large depth and long service life

Inactive Publication Date: 2015-05-06
HENAN JINGRUI SUPERHARD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional methods for removing residual metals, such as electrolysis and acid leaching, are difficult to leaching after the removal depth reaches 15 μm or more due to the limitation of process conditions; while the removal depth reaches 25 μm or more, it takes 240 hours Above, the efficiency is extremely low, not suitable for large-scale operation
Therefore, the problem of obtaining a polycrystalline diamond compact that removes residual metals has not yet been resolved

Method used

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  • Polycrystalline diamond composite sheet and treatment method thereof
  • Polycrystalline diamond composite sheet and treatment method thereof
  • Polycrystalline diamond composite sheet and treatment method thereof

Examples

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Effect test

Embodiment 1

[0058] (1) Take the 1913 polycrystalline diamond composite sheet produced by Henan Jingrui Superhard Material Co., Ltd., first use acetone to clean it for 40 minutes, remove the oil on the surface of the polycrystalline diamond composite sheet, and then sandblast the cleaned polycrystalline diamond composite sheet Treat for 35s, and then conduct electrospray plating under the condition of 6m / s for 90s to obtain a polycrystalline diamond composite sheet with a polytetrafluoroethylene layer; The bottom surface and all side surfaces of the substrate and some side surfaces of the polycrystalline diamond layer, the thickness of the polytetrafluoroethylene layer is 0.5mm.

[0059] (2) Get 50 above-mentioned polycrystalline diamond composite sheets with polytetrafluoroethylene layers, place them in a high-pressure reactor, and then add 500 mL of industrial hydrochloric acid with a concentration of 36%. The structural representation of the high pressure reactor is as figure 2 As sho...

Embodiment 2

[0063] (1) Take the 1913 type polycrystalline diamond composite sheet produced by Henan Jingrui Superhard Material Co., Ltd., first wash it with acetone for 45 minutes, remove the oil stain on the surface of the polycrystalline diamond composite sheet, and then sandblast the cleaned polycrystalline diamond composite sheet Treat for 40s, and then conduct electrospray plating under the condition of 5m / s for 100s to obtain a polycrystalline diamond composite sheet with a polytetrafluoroethylene layer; The bottom surface and all side surfaces of the substrate and some side surfaces of the polycrystalline diamond layer, the thickness of the polytetrafluoroethylene layer is 1.0mm.

[0064] (2) Get 50 above-mentioned polycrystalline diamond composite sheets with polytetrafluoroethylene layers, place them in a high-pressure reactor, and then add 500 mL of industrial hydrochloric acid with a concentration of 36%. The structural representation of the high pressure reactor is as figure...

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Abstract

The invention provides a polycrystalline diamond composite sheet and a treatment method thereof. The polycrystalline diamond composite sheet comprises a hard alloy substrate, a polycrystalline diamond layer and protection layers, wherein the polycrystalline diamond layer is compounded on the hard alloy substrate and comprises a layer without residual metal and a layer with the residual metal; the layer with the residual metal is located between the layer without the residual metal and the hard alloy substrate; the thickness of the polycrystalline diamond layer is 1.9mm-2.2mm; the thickness of the layer without the residual metal is 30-50 microns; the protection layers cover the bottom surface and all side faces of the hard alloy substrate, and part of the side face of the polycrystalline diamond layer. Compared with the prior art, the removing depth of the residual metal of the polycrystalline diamond layer of the polycrystalline diamond composite sheet provided by the invention is large and the hard alloy substrate is not corroded, so that the stability of the polycrystalline diamond composite sheet in a utilization process is improved and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of superhard materials, and more specifically relates to a polycrystalline diamond composite sheet and a processing method. Background technique [0002] Polycrystalline diamond composite sheet is a new type of composite material sintered with diamond micropowder and cemented carbide substrate under ultra-high pressure and high temperature conditions. Its structure includes a polycrystalline diamond layer and a cemented carbide layer as a support. Among them, the polycrystalline diamond layer has the characteristics of high hardness and good wear resistance, while the cemented carbide layer improves the toughness and weldability of the polycrystalline diamond composite sheet as a whole. , Drilling bits and other ideal materials for wear-resistant tools. [0003] However, during the high temperature and high pressure synthesis process of the polycrystalline diamond compact, some metal will remain in the poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46B23B27/20
Inventor 李治海王晓
Owner HENAN JINGRUI SUPERHARD MATERIAL
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