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Polycrystalline diamond composite tooth, preparation method and down-hole drill bit

A technology of polycrystalline diamond and composite teeth, which is applied in the direction of drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of poor bonding force, poor impact toughness of polycrystalline diamond composite teeth, etc., and achieve the reduction of tensile stress concentration and high body bonding force, improve the effect of impact toughness

Inactive Publication Date: 2015-01-14
HUANGHE S & T COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a polycrystalline diamond composite tooth, which solves the problems of poor bonding force between the cemented carbide matrix and the diamond layer of the existing polycrystalline diamond composite tooth and poor impact toughness of the polycrystalline diamond composite tooth

Method used

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  • Polycrystalline diamond composite tooth, preparation method and down-hole drill bit
  • Polycrystalline diamond composite tooth, preparation method and down-hole drill bit
  • Polycrystalline diamond composite tooth, preparation method and down-hole drill bit

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Embodiment 1

[0041] The polycrystalline diamond composite tooth of the present embodiment comprises a cemented carbide substrate and a polycrystalline diamond layer, and an impact-resistant layer is arranged between the cemented carbide substrate and the polycrystalline diamond layer, and the impact-resistant layer consists of the following mass percentage Component composition: Diamond 75%, WC15%, Co6%, Ni2%, TiC2%. The cemented carbide matrix is ​​composed of the following components in mass percentage: 10% Co, 90% WC; wherein the grain size of WC is 2.5-5.0 μm. The mass ratio of the impact-resistant layer to the polycrystalline diamond layer is 1:2. The polycrystalline diamond layer is composed of the following components in mass percentage: 50% of diamond with a particle size of 50-60 μm, 30% of diamond with a particle size of 30-40 μm, 10% of diamond with a particle size of 10-20 μm, and 10% of Co.

[0042] The structure of the polycrystalline diamond composite tooth of the present e...

Embodiment 2

[0052] The polycrystalline diamond composite tooth of this embodiment comprises a cemented carbide substrate and a polycrystalline diamond layer, and an impact-resistant layer is arranged between the cemented carbide substrate and the polycrystalline diamond layer, and the impact-resistant layer consists of the following mass percentage Composition: Diamond 80%, WC10%, Co3%, Ni4%, TiC3%. The cemented carbide matrix is ​​composed of the following components in mass percentage: Co8%, WC92%, wherein the grain size of WC is 2.5-5.0 μm. The mass ratio of the impact-resistant layer to the polycrystalline diamond layer is 1:3. The polycrystalline diamond layer is composed of the following components in mass percentage: 40% diamond with a particle size of 50-60 μm, 40% diamond with a particle size of 30-40 μm, 16% diamond with a particle size of 10-20 μm, and 4% Co.

[0053] The structure of the polycrystalline diamond composite tooth of the present embodiment is as figure 2 As sho...

Embodiment 3

[0063] The polycrystalline diamond composite tooth of this embodiment comprises a cemented carbide substrate and a polycrystalline diamond layer, and an impact-resistant layer is arranged between the cemented carbide substrate and the polycrystalline diamond layer, and the impact-resistant layer consists of the following mass percentage Component composition: Diamond 78%, WC12%, Co7%, Ni2%, TiC1%. The cemented carbide matrix is ​​composed of the following components in mass percentage: Co6%, WC94%, wherein the grain size of WC is 2.5-5.0 μm. The mass ratio of the impact-resistant layer to the polycrystalline diamond layer is 1:4. The polycrystalline diamond layer is composed of the following components in mass percentage: 40% diamond with a particle size of 50-60 μm, 33% diamond with a particle size of 30-40 μm, 20% diamond with a particle size of 10-20 μm, and 7% Co.

[0064] The preparation method of the polycrystalline diamond composite tooth of the present embodiment comp...

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Abstract

The invention discloses a polycrystalline diamond composite tooth, a preparation method and a down-hole drill bit. The polycrystalline diamond composite tooth comprises a hard alloy matrix and a polycrystalline diamond layer, wherein an impact-resistant layer is arranged between the hard alloy matrix and the polycrystalline diamond layer, and consists of the following components in percentage by weight: 75-80 percent of diamond, 10-15 percent of WC (Wolfram Carbide) and the balance of adhesive. According to the polycrystalline diamond composite tooth, the impact-resistant layer is arranged between the hard alloy matrix and the polycrystalline diamond layer, and consists of the diamond, the WC and the adhesive, so that the binding force between the hard alloy matrix and the polycrystalline diamond layer is improved by the impact-resistant layer, tensile stress concentration is effectively reduced, the impact toughness of the polycrystalline diamond composite tooth is improved, further the quality of the polycrystalline diamond composite tooth is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, specifically relates to a polycrystalline diamond composite tooth and a preparation method thereof, and also relates to a down-the-hole drill using the polycrystalline diamond composite tooth. Background technique [0002] The down-the-hole bit is the key component in the down-the-hole rock drilling project. It is used in open-pit and underground mines, quarries, hydropower projects, well drilling, mineral exploration, rock mass cable anchor hole drilling, geothermal excavation, and subway engineering excavation. , Side pile support and other construction sites are widely used; at the same time, it is also one of the main consumable parts. According to statistics, in the cost of rock drilling, the cost of drill bits accounts for more than 20%. At present, the main products on the market are down-the-hole drills inlaid with cemented carbide column teeth, which are mostly made of cemente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46B22F3/02B22F5/08
CPCE21B10/46B22F3/02B22F5/08
Inventor 王瑞利杨汉嵩蒋爱云何春霞郭晓君郭会娟
Owner HUANGHE S & T COLLEGE
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