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High-speed polycrystalline diamond compact sheet

A technology of polycrystalline diamond and composite sheet, which is applied in drilling equipment, earthwork drilling, drill bits, etc. It can solve the problems of performance degradation and achieve the effects of increased cutting force and impact force performance, long life, and enhanced impact resistance

Active Publication Date: 2013-08-21
桂林星钻超硬材料有限公司
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AI Technical Summary

Problems solved by technology

It can be seen that the traditional polycrystalline diamond composite sheet will not only not increase the cutting force and impact force performance with the increase of its use time, but will gradually decrease with the wear of the polycrystalline diamond composite sheet.

Method used

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  • High-speed polycrystalline diamond compact sheet

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Experimental program
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Effect test

Embodiment Construction

[0017] see figure 1 , a high-speed polycrystalline diamond composite sheet of the present invention includes a disc-shaped composite sheet body, and the composite sheet body is mainly composed of a plurality of hard sector blocks 2-1 and a plurality of soft sector blocks 2-2 . The hard sector 2-1 and the soft sector 2-2 are sector-shaped, and have different wear ratios between them. A plurality of hard sector blocks 2-1 and soft sector blocks 2-2 with the same center and radius are arranged at intervals to form a complete disc. The above polycrystalline diamond composite sheet is produced by sintering two kinds of diamond powders with different wear ratios, wherein two adjacent sector blocks have different wear ratios, and two spaced sector blocks have the same wear ratio . The polycrystalline material at the junction of the hard sector 2-1 and the soft sector 2-2 with different wear ratios penetrates into each other during the sintering process to form a smooth transition....

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Abstract

The invention discloses a high-speed polycrystalline diamond compact sheet, which comprises a compact sheet body of a circular sheet shape, wherein the compact sheet body is mainly formed by the composition of a plurality of hard fan-shaped blocks and a plurality of soft fan-shaped blocks, and both the hard fan-shaped blocks and the soft fan-shaped blocks are of a fan shape with different abrasion ratios; the hard fan-shaped blocks and the soft fan-shaped blocks with the same circle center and the same radius are arranged in an interleaving way so as to form a complete circular sheet jointly; and the two adjacent fan-shaped blocks have the different abrasion ratios, and every other fan-shaped blocks have the same abrasion ratio. The invention makes the polycrystalline diamond compact sheet better embedded into a rock layer under the precondition that an exposure height is ensured.

Description

technical field [0001] The invention relates to the field of superhard materials, in particular to a high-speed polycrystalline diamond composite sheet. Background technique [0002] Conventional diamond composite teeth are generally composed of a polycrystalline diamond composite sheet on the surface and a cemented carbide matrix on the bottom layer through high temperature and high pressure. The polycrystalline diamond composite sheet has the characteristics of high hardness and good wear resistance, and the cemented carbide matrix improves the flexibility and weldability of the composite material as a whole. Since the polycrystalline diamond composite sheet is the most important cutting surface on the diamond composite tooth, during the working process, the cutting stress is mainly concentrated at the intersection line between the upper end surface and the side surface of the polycrystalline diamond composite sheet, that is, the contour line of the cutting edge. It can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46
Inventor 周付坤
Owner 桂林星钻超硬材料有限公司
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