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Diamond composite sheet and preparation method thereof

A diamond composite sheet and diamond technology are applied in the field of diamond composite sheet and its preparation to achieve the effects of enhanced impact toughness and thermal stability, improved radial temperature field distribution, good economic and social benefits

Inactive Publication Date: 2011-05-04
HENAN FAMOUS DIAMOND IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of drilling technology, the requirements for diamond compacts are getting higher and higher, especially in hard formations with f>10 or highly abrasive formations, ordinary diamond compacts cannot meet the needs

Method used

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  • Diamond composite sheet and preparation method thereof
  • Diamond composite sheet and preparation method thereof
  • Diamond composite sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A diamond composite sheet is composed of a layer of 1mm-thick diamond on a hard alloy, and a layer of 0.1mm-thick polycrystalline diamond on the diamond by a vapor phase epitaxy growth method. The assembly method of the diamond composite sheet is as follows: pyrophyllite on the outer side and inner side is used as the pressure transmission medium, and ZrO2 is used on the outer side and inner circle 2 As insulation material, cylindrical NaCl cup as pressure and temperature equalization material, high temperature resistant metal Mo as shielding material, square graphite sheet as heat source to realize end surface heating.

[0016] The equipment for heating the end surface is a six-sided top press.

Embodiment 2

[0018] A diamond composite sheet is composed of a layer of 2mm-thick diamond on the cemented carbide, and a layer of 0.2mm-thick polycrystalline diamond on the diamond by vapor phase epitaxy growth method. The assembly method of the diamond composite sheet is as follows: use pyrophyllite on the outer side and inner side as the pressure transmission medium, MgO on the outer side and inner circle as the insulation material, the cylindrical NaCl cup as the pressure and temperature equalization material, and the high temperature resistant metal Ta as the shielding material. The square graphite sheet is used as a heat source to realize end surface heating.

[0019] The equipment for heating the end surface is a six-sided top press.

Embodiment 3

[0021] A diamond composite sheet is composed of a layer of 1.5mm thick diamond on the cemented carbide, and a layer of 0.15mm thick polycrystalline diamond on the diamond by vapor phase epitaxy growth method. The assembly method of the diamond composite sheet is as follows: use pyrophyllite on the outer side and inner side as the pressure transmission medium, MgO on the outer side and inner circle as the insulation material, the cylindrical NaCl cup as the pressure and temperature equalization material, and the high temperature resistant metal Ta as the shielding material. The square graphite sheet is used as a heat source to realize end surface heating.

[0022] The equipment for heating the end surface is a six-sided top press.

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Abstract

The invention discloses a diamond composite sheet. A diamond layer is compounded on hard alloy, and a glomerocryst diamond layer is compounded on diamond. The invention greatly improves the radial temperature-field distribution of the composite sheet and ensures that cobalt in the hard alloy uniformly spreads cross the diamond layer. The composite sheet prepared with the method has the advantages that the abrasive resistance of the diamond layer is uniform, the diamond layer is firmly combined with the hard alloy layer, and the impact toughness and the heat stability are enhanced.

Description

technical field [0001] The invention belongs to diamond, and in particular relates to a diamond composite sheet and a preparation method thereof. Background technique [0002] Under high temperature and high pressure conditions (1500°C, 5.5Gpa), a diamond composite sheet can be obtained by compounding a layer of diamond on the cemented carbide substrate. Diamond composite sheet is a kind of composite material with excellent performance. It not only has the high wear resistance of diamond, but also has the impact toughness and weldability of cemented carbide. It is widely used in petroleum, geological exploration, machinery, stone processing, etc. field. Now, in terms of oil exploration, from soft to medium-hard formations, all diamond compact drill bits are used for drilling. With the advancement of drilling technology, the requirements for diamond compacts are getting higher and higher, especially in hard formations with f>10 or highly abrasive formations, ordinary dia...

Claims

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Application Information

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IPC IPC(8): B22F7/02B23P5/00C23C16/27
Inventor 李建林朱长福李洪波邹泽宏
Owner HENAN FAMOUS DIAMOND IND CO LTD
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