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Preparation method of ultrahard anti-abrasion PCD (Poly Crystal Diamond) material containing enhanced core

A technology of polycrystalline diamond and wear-resistant materials, which is applied in the synthesis of polycrystalline diamond PCD superhard wear-resistant composite materials, and in the field of high-temperature and high-pressure sintering to synthesize superhard composite materials. A whole material and other issues to achieve the effect of broadening the scope of application

Active Publication Date: 2014-04-30
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These limit the application of polycrystalline diamond
[0007] Cubic boron nitride c-BN, cubic carbon boron nitride c-BC 2 N, boron carbide B 4 C and nano-twinned cubic boron nitride nt-CBN are all materials with ultra-high hardness. These materials only have outstanding single performance, and their extremely high brittleness makes it difficult to use them as a whole material alone.

Method used

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  • Preparation method of ultrahard anti-abrasion PCD (Poly Crystal Diamond) material containing enhanced core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Use a laser cutting machine to cut cubic boron nitride into small square columns of 1×1×4mm.

[0029] 2. Screen diamond micropowder, according to 325-400 mesh, 460-700 mesh, 700-1200 mesh, 1200-1800 mesh, there are 8 parts, 8 parts, 70 parts, and 10 parts respectively for proportioning, according to the binder ratio The mass ratio of the total mass of the powder is 1:20. Add the binder to the diamond powder and mix well. After mixing, put it into a porous graphite column with a circular hole diameter of Φ=3mm and a height of h=5mm. Insert a cubic boron nitride column into the diamond powder, so that the cubic boron nitride column is completely surrounded by the diamond powder. Put the prepared material into the vacuum reduction furnace for reduction for 48h.

[0030] 3. Put the vacuum-reduced porous graphite column into the pyrophyllite block for assembly, and put the assembled pyrophyllite block into the hinged six-sided top press. After the press pressure rises t...

Embodiment 2

[0033] 1. Use a laser cutting machine to cut cubic boron carbonitride into small cylinders of φ1×5mm.

[0034] 2. Screen diamond micropowder, according to the ratio of 325-400 mesh, 460-700 mesh, 700-1200 mesh, 1200-1800 mesh, there are 15 parts, 20 parts, 50 parts, 30 parts respectively, according to the binder ratio The mass ratio of the total mass of the powder is 1:20. Add the binder to the diamond powder and mix well. After mixing, put it into a porous graphite column with a circular hole diameter of Φ=3mm and a height of h=6mm. Insert a cubic boron carbonitride column into the diamond powder, so that the cubic carbon boron nitride column is completely surrounded by the diamond powder. Put the prepared material into the vacuum reduction furnace for 24h reduction.

[0035] 3. Put the vacuum-reduced porous graphite column into the pyrophyllite block for assembly, and put the assembled pyrophyllite block into the hinged six-sided top press. After the press pressure rises t...

Embodiment 3

[0038] 1. Use a laser cutting machine to cut boron carbide into small square columns of 1.2×1.2×4mm.

[0039] 2. Screen diamond micropowder, according to the ratio of 325-400 mesh, 460-700 mesh, 700-1200 mesh, 1200-1800 mesh, there are 10 parts, 15 parts, 65 parts, 10 parts respectively, according to the binder ratio The mass ratio of the total mass of the powder is 1:5. After mixing, put it into a porous graphite column with a square hole side l=2mm and a height h=5mm. Insert a boron carbide cylinder into the diamond powder so that the boron carbide cylinder is completely surrounded by the diamond powder. Put the prepared materials into a vacuum reduction furnace for reduction for 36 hours.

[0040] 3. Put the vacuum-reduced porous graphite column into the pyrophyllite block for assembly, and put the assembled pyrophyllite block into the hinged six-sided top press. After the press pressure rises to 30MPa, start heating, keep the heating current at 50A for 35s, then reduce t...

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Abstract

The invention discloses a preparation method of an ultrahard anti-abrasion PCD (Poly Crystal Diamond) material containing an enhanced core. The enhanced-core-containing PCD (Poly Crystal Diamond) material is obtained by cutting cubic boron nitride (c-BN), cubic boron carbon nitride (c-BC2N), boron carbide (B4C) or nano twin-crystal cubic boron nitride (nt-CBN) serving as the enhanced core into small columns, burying the column bodies of the enhanced core into diamond micro powder, putting the diamond micro powder into a pyrophyllite block and performing synthesis under high-temperature and high-pressure conditions. The novel ultrahard anti-abrasion material prepared by the preparation method disclosed by the invention integrates two characteristics, which are similar to ultrahigh hardness of natural diamonds and toughness of a poly crystal material, of an ultrahard extreme material, so that the application ranges of the ultrahard extreme material and the PCD material are expanded and the increasing requirements on the performance of ultrahard anti-abrasion materials of the mechanical manufacturing and petroleum / geological exploration industries are met.

Description

[0001] technical field [0002] The present invention relates to a kind of additive such as cubic boron nitride c-BN, cubic carbon boron nitride c-BC 2 N, boron carbide B 4 C or nano-twinned cubic boron nitride nt-CBN as a synthetic method of polycrystalline diamond PCD superhard wear-resistant composite material as a reinforcing core is a new method of high temperature and high pressure sintering to synthesize superhard composite materials, which belongs to the field of superhard materials . Background technique [0003] Polycrystalline diamond (PCD) has unparalleled excellent properties, such as high hardness and wear resistance, low friction coefficient, high thermal conductivity, high machining accuracy, etc., and has been used in the automotive and aerospace fields, wood processing industry, electronics industry, It is more and more widely used in petroleum geological drilling industry, wire mold, glass cutting processing, gem processing and other fields. [0004] PC...

Claims

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Application Information

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IPC IPC(8): B01J3/06
Inventor 岳文孟德忠王成彪吴宗毅颜刚林芳付志强
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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