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Diamond compact and manufacturing method thereof

A technology of diamond composite sheet and manufacturing method, which is applied in the field of diamond composite sheet for drilling industry and its preparation, can solve problems such as cracks easily appearing on the interface of composite sheet, achieve the effects of reducing production cost, reducing the amount of diamond micropowder, and prolonging the service life

Active Publication Date: 2016-05-11
ZHUZHOU XIANGYU CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose a method for preparing a diamond composite sheet with a thicker diamond layer without interfacial cracks for the increase in the thickness of the diamond layer of the existing diamond composite sheet that may lead to cracks at the interface of the composite sheet, thereby improving The service life of diamond compacts meets the needs of deep well drilling

Method used

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  • Diamond compact and manufacturing method thereof
  • Diamond compact and manufacturing method thereof
  • Diamond compact and manufacturing method thereof

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Embodiment 1

[0045] by attaching Figure 1-4 It can be seen that the present invention relates to a diamond composite sheet, comprising a cemented carbide substrate 1 and a diamond layer 2, and the diamond layer 2 is compounded on the cemented carbide substrate 1, which is characterized in that the diamond layer at the working edge part 3 of the diamond composite sheet The thickness is greater than the thickness of the diamond layer at the non-cutting edge, and the thickness of the diamond layer is only increased at the working edge part 3 of the diamond composite sheet. By locally increasing the thickness of the diamond layer, the overall performance of the diamond composite sheet can be changed, and the overall impact resistance can be improved. And reduce the wear of the mud on the substrate.

[0046] The diamond layer thickness of the working edge part 3 of the diamond composite sheet is greater than the diamond layer thickness of the non-edge part according to the degree of the diamon...

Embodiment 2

[0062] The basic structure of embodiment two is the same as that of embodiment one, except that the part of the bonding surface joined by the cemented carbide substrate and the diamond layer is made into a gap shape, which is to make the part participating in the cutting operation into a three-layer stepped shape (such as attached Figure 5 shown); in the cemented carbide substrate 201, a three-layer stepped notch groove 205 is made on the part 203 participating in the cutting operation, which are respectively the first stepped layer 204, the second stepped layer 207 and the third stepped layer 206; the diamond Layer 202 is made into a three-layer stepped protruding block by the part participating in the cutting operation, and the fan-shaped three-layer stepped protruding block of the diamond layer matches the fan-shaped three-layer stepped notch groove on the cemented carbide substrate; the surface thickness of the diamond layer is 0.5mm, the thickness of the first stepped la...

Embodiment 3

[0064] The basic structure of the third embodiment is the same as that of the first embodiment, except that the part 303 of the bonding surface where the cemented carbide substrate 301 and the diamond layer are bonded is made into a notch, and the part that participates in the cutting operation is made into a fan-shaped oblique block 304 (as attached Image 6 As shown); in the cemented carbide substrate 301, the fan-shaped oblique block gap groove is made on the part that participates in the cutting operation, and the fan-shaped oblique block protruding block is made on the part of the diamond layer 302 that participates in the cutting operation, and the fan-shaped oblique block of the diamond layer protrudes The blocks fit into the scalloped block notch grooves on the cemented carbide substrate.

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Abstract

The invention discloses a diamond compact. The diamond compact comprises a hard alloy matrix and a diamond layer, wherein the diamond layer is compounded on the hard alloy matrix; the diamond layer at the work cutting edge position of the diamond compact is thicker than the diamond layer at the non-cutting edge position. The thickness of the diamond layer is only increased at the work cutting edge position of the diamond compact, and the thickness of the diamond layer is locally increased to change the integral property of the diamond compact, so that the integral impact resistance is improved and the abrasion of slurry to the matrix is relieved. According to the invention, the diamond layer is locally thickened, compared to the situation that the whole diamond layer of the compact is thickened, the diamond micropowder amount required is greatly reduced, so that the production cost is lowered, but the whole diamond layer thickening effect can be achieved.

Description

technical field [0001] The invention relates to a composite material of cemented carbide and diamond and a manufacturing method thereof, in particular to a diamond composite sheet used in the drilling industry and a preparation method thereof, and can also be widely used in other industrial and mining sites where diamond composite sheets are used for operations. The invention belongs to the technical field of preparation of diamond / tungsten carbide composite materials. Background technique: [0002] Polycrystalline Diamond Compact (PDC) is a layered structure composite superhard material sintered by diamond micropowder and cemented carbide matrix at high temperature (1300-1500°C) and ultra-high pressure (5-7Gpa). Composite drill bits using diamond composite sheets as rock cutting teeth have been widely used in petroleum, coal, and natural gas mining industries. At present, the thickness of the diamond layer of the diamond composite sheet for drilling is generally between 1....

Claims

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Application Information

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IPC IPC(8): E21B10/46E21C35/183B22F7/06
CPCB22F7/062E21B10/46E21C35/183
Inventor 杨友诚
Owner ZHUZHOU XIANGYU CEMENTED CARBIDE
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