Polycrystalline diamond compact with excellent electric conductivity and method for manufacturing polycrystalline diamond compact

A technology for conductive diamond and diamond polycrystalline, applied in the field of diamond polycrystalline composite sheet and its preparation, can solve the problems of inability to perform electrical discharge machining, lack of electrical conductivity, difficult welding processing, etc., and achieves reduction of abnormal growth and good electrical conductivity. , the effect of reducing residual

Active Publication Date: 2015-10-07
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common diamond polycrystalline composite sheet in the prior art is sintered from diamond-cobalt system, and its bonding phase is composed of cobalt, which has a certain conductivity and has the advantages of electric discharge machining. The phase is metal cobalt, so it has the weakness of low heat resistance, and only has a heat resistance of about 700°C
The other is sintered from diamond-carbonate system, and its bondi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A diamond polycrystalline composite sheet with good electrical conductivity comprises a diamond polycrystalline layer and a cemented carbide substrate. The diamond polycrystalline layer is composed of the following raw materials in weight percentage: 75% of diamond powder with a particle size of 0.5-40 μm, hard 20% high-quality alloy powder and 5% nano-metal bond, and the diamond powder is composed of the following raw materials in weight percentage: 60% boron-free diamond powder, 40% boron-containing diamond powder with a boron element content of 0.0005-0.015%; Cemented carbide powder is composed of the following raw materials in weight percentage: 85% WC powder, 12% Co powder, 2% Ti powder and 1% TaC powder, wherein the particle size of WC powder and Co powder is 1-3μm, Ti The particle size of TaC powder and TaC powder is 1.5-2 μm; the binder is composed of the following raw materials in weight percentage: Co powder 97%, Ni powder 2%, W powder 0.9% and B powder 0.1%, w...

Embodiment 2

[0031] A diamond polycrystalline composite sheet with good electrical conductivity comprises a diamond polycrystalline layer and a cemented carbide substrate. The diamond polycrystalline layer is composed of the following raw materials in weight percentage: 85% of diamond powder with a particle size of 0.5-40 μm, hard 12% high-quality alloy powder and 3% nano-metal bond, and the diamond powder is composed of the following raw materials in weight percentage: 70% boron-free diamond powder, 30% boron-containing diamond powder with a boron content of 0.0005-0.015%; Cemented carbide powder is composed of the following raw materials in weight percentage: WC powder 90%, Co powder 8%, Ti powder 1.5% and TaC powder 0.5%, wherein the particle size of WC powder and Co powder is 1-3μm, Ti The particle size of TaC powder and TaC powder is 1.5-2 μm; the binder is composed of the following raw materials in weight percentage: Co powder 99%, Ni powder 0.45%, W powder 0.5%, B powder 0.05%, where...

Embodiment 3

[0039] A diamond polycrystalline composite sheet with good electrical conductivity comprises a diamond polycrystalline layer and a cemented carbide substrate. The diamond polycrystalline layer is composed of the following raw materials in weight percentage: 82% of diamond powder with a particle size of 0.5-40 μm, hard 14% high-quality alloy powder and 4% nano-metal bond, and the diamond powder is composed of the following raw materials in weight percentage: 66% of boron-free diamond powder, 34% of boron-containing diamond powder with a boron content of 0.0005-0.015%; Cemented carbide powder is composed of the following raw materials in weight percentage: WC powder 87%, Co powder 10%, Ti powder 2% and TaC powder 1%, wherein the particle size of WC powder and Co powder is 1-3 μm, Ti The particle size of TaC powder and TaC powder is 1.5-2 μm; the binder is composed of the following raw materials in weight percentage: Co powder 98%, Ni powder 1.5%, W powder 0.4% and B powder 0.1%, ...

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PUM

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Abstract

The invention discloses a polycrystalline diamond compact with excellent electric conductivity and a method for manufacturing the polycrystalline diamond compact. The polycrystalline diamond compact is characterized in that polycrystalline diamond layers of the compact comprise 75-85% of diamond micro-powder, 12-20% of hard alloy powder and 3-5% of nano-metal bonding agents, and the diamond micro-powder includes 60-70% of diamond micro-powder without boron and 30-40% of diamond micro-powder with boron; the hard alloy powder comprises 85-90% of WC powder, 8-12% of Co powder, 1.5-2% of Ti powder and 0.5-1% of TaC powder. The polycrystalline diamond compact and the method have the advantages that the shortcoming that the electric conductivity and the heat-resistance of a polycrystalline diamond compact manufactured in the prior art cannot be simultaneously taken into consideration can be overcome by the aid of conductive and heat-resistant materials such as the boron and tungsten carbide in formulas of the polycrystalline diamond layers, the polycrystalline diamond compact manufactured by the aid of the method is excellent in electric conductivity and heat-resistance simultaneously as compared with the polycrystalline diamond compact manufactured in the prior art, and discharge, welding machining and service requirements on the compact can be met; the method for manufacturing the polycrystalline diamond compact is simple in technology and high in operability, and the polycrystalline diamond compact can be conveniently manufactured by the aid of the method.

Description

technical field [0001] The invention belongs to the technical field of diamond and hard alloy composite materials, and in particular relates to a diamond polycrystalline composite sheet with good electrical conductivity and a preparation method thereof. Background technique [0002] Diamond polycrystalline composite sheet is a kind of superhard composite material made of diamond micropowder as raw material, cemented carbide as matrix, and sintered under high temperature and high pressure conditions through a specific synthesis process. The composite sheet has the advantages of high diamond hardness, good wear resistance and strong impact resistance of cemented carbide, and is widely used in the field of cutting non-ferrous metals and difficult-to-machine non-metallic materials. The common diamond polycrystalline composite sheet in the prior art is sintered from diamond-cobalt system, and its bonding phase is composed of cobalt, which has a certain conductivity and has the ad...

Claims

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Application Information

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IPC IPC(8): C22C26/00C22C1/05
Inventor 张涛卢灿华刘俊涛窦明
Owner ZHONGNAN DIAMOND CO LTD
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