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Polycrystalline diamond

A technology of diamond and diamond particles, which can be used in metal processing equipment, accessories of tool holders, earth drilling and mining, etc., and can solve problems such as wear resistance decline

Active Publication Date: 2013-04-10
ELEMENT SIX ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of PCD containing specific diamond catalyst materials as filler material may be its reduced wear resistance at elevated temperatures

Method used

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  • Polycrystalline diamond
  • Polycrystalline diamond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A bimodal mixed diamond powder was prepared by mixing together diamond particles from two different sources, the diamond particles in the first source having an average size of about 2 microns and the diamond particles in the second source about 5 microns in size, with An aggregated mixture of diamond particles is formed. The mixed diamond particles are treated in acid to remove surface impurities that may be present. Vanadium carbide and titanium carbide were then introduced into the diamond powder mixture by mixing the VC particles and TiC particles with the diamond powder using a planetary ball mill. The average size of the TiC particles was about 3 microns and the average size of the VC particles was about 4 microns. The content of TiC particles in the powder is about 0.5 wt % of the diamond powder, and the content of VC particles is about 0.5 wt % of the diamond powder.

[0047] Aggregates of coated diamond powder were placed on a sintered cobalt WC substrate and...

Embodiment 2

[0050] A test PCD tool insert and a control PCD tool were prepared and tested as described in Example 2, except that the content of TiC particles in the powder before sintering was about 1.5 wt% of the diamond powder, and the content of VC particles was 1.5 wt% of the diamond powder. About 1.5 wt%. The cutting distance obtained with the test insert was about 40% longer than that obtained with the control insert, and the wear scar on the test insert was about half the apparent wear scar on the control insert.

Embodiment 3

[0052] Trimodal hybrid diamond powder was prepared by mixing together three different sources of diamond particles, the diamond particles from the first source having an average size of about 0.8 microns and the diamond particles from the second source having an average size of about 2 microns , the diamond particles in the third source had an average size of about 10 microns to form an aggregated mixture of diamond particles. The mixed diamond particles are treated in acid to remove surface impurities that may be present. Vanadium carbide and titanium carbide were then introduced into the diamond powder mixture by mixing the VC particles and TiC particles with the diamond powder using a planetary ball mill. The average size of the TiC particles was about 3 microns, and the average size of the VC particles was about 4 microns. The content of TiC particles in the powder is about 1.5 wt % of the diamond powder, and the content of VC particles is about 1.5 wt % of the diamond po...

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Abstract

A PCD body comprises a skeletal mass of inter-bonded diamond grains defining interstices between them. At least some of the interstices contain a filler material comprising a metal catalyst material for diamond, the filler material containing Ti, W and an additional element M selected from the group consisting of V, Y, Nb, Hf, Mo, Ta, Zr Cr, Zr and the rare earth elements. The content of Ti within the filler material is at least 0.1 weight% and at most 20 weight%. The content of M within the filler material is at least 0.1 weight% and at most 20 weight%, and the content of W within the filler material is at least 5 weight% and at most 50 weight% of the filler material.

Description

technical field [0001] The present invention relates to a polycrystalline diamond (PCD) body and a tool or tool element comprising a PCD body, particularly but not exclusively for drilling into the earth or fracturing rock. Background technique [0002] Tool elements containing polycrystalline diamond (PCD) are widely used in various tools for cutting, machining, drilling or fracturing hard or abrasive materials such as rocks, metals, ceramics, composites and wood containing materials. The PCD contains a large number of substantially intergrown diamond particles and forms a framework that defines the interstices between the diamond particles. The PCD material contains at least about 80 vol % diamond and can be obtained by subjecting aggregates of diamond particles to ultra-high pressures above about 5 GPa and at least about 1200 in the presence of a sintering aid, also known as diamond catalyst material °C temperature is prepared. The diamond catalyst material can be under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C26/00B22F3/15C04B35/00E21B10/00
CPCB22F7/06B22F2005/001C04B35/52C04B35/5607C04B35/5626C04B35/6265C04B35/62818C04B35/62826C04B35/62831C04B35/62842C04B35/62886C04B35/62892C04B35/62894C04B35/645C04B2235/3839C04B2235/3843C04B2235/3847C04B2235/427C04B2235/441C04B2235/5436C04B2235/5445C04B2235/5472C04B2235/656C04B2235/6567C22C1/05C22C26/00E21B10/567B23B27/22C09K3/14E21B10/46E21B10/48E21B10/50E21B10/52
Inventor 卡维施尼·耐度汉弗莱·萨姆克罗·路基萨尼·希特赫比
Owner ELEMENT SIX ABRASIVES