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Super-thick polycrystalline diamond composite material, preparing method and application of super-thick polycrystalline diamond composite material

A technology of polycrystalline diamond and polycrystalline diamond layer, which is applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of abnormal growth of diamond grains, long infiltration distance, and inability to meet application requirements in performance. , to achieve the effect of good overall stability, long service life and good stability

Active Publication Date: 2020-06-16
成都比拓超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3) PCD with a polycrystalline diamond layer thickness greater than 2mm, due to the long infiltration distance of cobalt in the matrix in the polycrystalline diamond layer during the high temperature and high pressure sintering process, will lead to abnormal growth of diamond grains, etc., making The consistency and uniformity of the polycrystalline diamond layer cannot meet the requirements of subsequent processing and use
[0008] To sum up, ultra-thick polycrystalline diamond composites are difficult to prepare by the traditional "high pressure and high temperature infiltration sintering method", even if they are barely obtained, they cannot meet the requirements of use in terms of performance

Method used

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  • Super-thick polycrystalline diamond composite material, preparing method and application of super-thick polycrystalline diamond composite material
  • Super-thick polycrystalline diamond composite material, preparing method and application of super-thick polycrystalline diamond composite material
  • Super-thick polycrystalline diamond composite material, preparing method and application of super-thick polycrystalline diamond composite material

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Embodiment 1

[0055] This embodiment provides an ultra-thick polycrystalline diamond composite sheet. The polycrystalline diamond composite material includes a polycrystalline diamond layer and a cemented carbide substrate. The diameter of the polycrystalline diamond composite sheet is 30 mm, and the thickness of the polycrystalline diamond layer is 3 mm. The ultra-thick polycrystalline diamond compact is prepared by the following method:

[0056] A WC-Co cemented carbide substrate with a thickness of 5 mm and a diameter of 35 mm, a polycrystalline diamond micropowder layer with a thickness of 5 mm, and a cobalt sheet with a thickness of 0.08 mm are stacked from bottom to top, as figure 1 shown.

[0057] Then, an ultra-thick polycrystalline diamond composite layer was prepared by high-temperature and high-pressure sintering; the sintering temperature was 1600° C., and the sintering pressure was 6.5 GPa. The high-temperature and high-pressure sintered green body can be processed by removing...

Embodiment 2

[0059] This embodiment provides an ultra-thick polycrystalline diamond composite sheet. The polycrystalline diamond composite material includes a polycrystalline diamond layer and a cemented carbide substrate. The diameter of the polycrystalline diamond composite sheet is 50 mm, and the thickness of the polycrystalline diamond layer is 9 mm. The ultra-thick polycrystalline diamond compact is prepared by the following method:

[0060] Place a cemented carbide substrate with a thickness of 10mm on the bottom, and then three layers of polycrystalline diamond micropowder layers with a thickness of 5mm and three layers of cobalt sheets with a thickness of 0.16mm are stacked alternately from bottom to top, as figure 2 shown.

[0061] Then, an ultra-thick polycrystalline diamond composite layer was prepared by high-temperature and high-pressure sintering; the sintering temperature was 1650° C., and the sintering pressure was 7.0 GPa.

Embodiment 3

[0063] This embodiment provides an ultra-thick polycrystalline diamond composite sheet. The polycrystalline diamond composite material includes a polycrystalline diamond layer and a cemented carbide substrate. The diameter of the polycrystalline diamond composite sheet is 40 mm, and the thickness of the polycrystalline diamond layer is 5 mm. The ultra-thick polycrystalline diamond compact is prepared by the following method:

[0064] A cemented carbide substrate with a thickness of 7mm, a polycrystalline diamond powder layer with a thickness of 3mm, a polycrystalline diamond composite sheet sintered at high temperature and high pressure with a thickness of 2mm (the cemented carbide substrate is completely removed), and a polycrystalline diamond with a thickness of 3mm The micropowder layer and the cobalt sheet with a thickness of 0.5 mm are stacked sequentially from bottom to top, such as image 3 shown. The polycrystalline diamond compact (mainly composed of polycrystalline ...

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Abstract

The invention discloses a super-thick polycrystalline diamond composite material. A polycrystalline diamond layer and a hard alloy matrix are included. The hard alloy matrix is a cobalt containing matrix. The diameter of the polycrystalline diamond composite material is larger than or equal to 30 mm, and the thickness of the polycrystalline diamond layer is larger than or equal to 3 mm. Accordingto a composite material preparing method, the hard alloy matrix and at least one polycrystalline diamond micro powder layer are stacked, when the hard alloy matrix and one polycrystalline diamond micro powder layer are stacked, one face of the polycrystalline diamond micro powder layer makes contact with the hard alloy matrix, and the other face makes contact with a cobalt source layer; when the hard alloy matrix and at least two polycrystalline diamond micro powder layers are stacked, a cobalt source layer is laid between the polycrystalline diamond micro powder layers; and a high-temperatureand high-pressure sintering method is adopted to prepare and obtain a super-thick polycrystalline diamond composite layer. By adoption of the provided technology, the super-thick polycrystalline diamond composite material with abrasion resistance, impact resistance and other performance meeting the requirements can be obtained, and the material can be directly used for cutting, preparing and machining of a tool.

Description

technical field [0001] The invention relates to the technical field of machining materials, in particular to an ultra-thick polycrystalline diamond composite material, a preparation method and an application thereof. Background technique [0002] Polycrystalline diamond composite material (also known as diamond composite sheet, English name: Polycrystalline Diamond, often referred to as PCD) is widely used in the production of superhard tools. Compared with the knives made of traditional carbide, tool steel, ceramics and other materials, the knives made of polycrystalline diamond composite materials have high speed and high efficiency, energy saving and environmental protection, high machining accuracy, high machining surface finish, high wear resistance, high life, high Thermal conductivity and other advantages. The polycrystalline diamond composite material is made by sintering the polycrystalline diamond layer and the cemented carbide (WC-Co alloy) substrate at high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22F3/14B22F5/00
CPCB22F7/04B22F3/14B22F5/00B22F2007/045B22F2005/001
Inventor 贺端威杨缤维
Owner 成都比拓超硬材料有限公司
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