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A kind of catalyst alloy powder and its surface grooved diamond prepared by using it, preparation method and application

A technology of diamond and alloy powder, which is used in diamond products and applications, catalyst alloy powder and the preparation of surface groove-shaped diamond by using it, can solve the problem that diamond cannot adapt to high-load working conditions, and the surface is smooth and diamond self-sharpening is not high enough. , can not guarantee the service life and other problems, to achieve the effect of large holding force, increase the proportion and improve the service life

Active Publication Date: 2020-07-07
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the self-sharpening of the existing smooth surface diamond is not high enough and the holding force between the bond and the bond is small, especially when it is used as an abrasive grain under a high-load working condition, it is easy to fall off prematurely and greatly shorten the service life.
[0003] Patent CN103521132B discloses a synthesis process of high self-sharpening diamond, which uses nickel-containing iron-based catalyst and diamond surface coated with zirconia coating. Although it can improve the self-sharpening of diamond, it does not achieve self-sharpening by changing the surface morphology of diamond itself. After the zirconia wears off, the diamond itself still cannot adapt to the high-load working state, and the service life cannot be guaranteed

Method used

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  • A kind of catalyst alloy powder and its surface grooved diamond prepared by using it, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a surface-grooved diamond, comprising the following steps:

[0023] (1) Preparation of catalyst alloy powder: trace elements of copper, manganese, chromium, niobium and cobalt are added to the iron-based catalyst, and the catalyst alloy powder is composed of the following raw materials in mass percentage: iron 79%, copper 12.5%, manganese 2.5%, chromium 1 %, niobium 1%, cobalt 4%; then made into 250 mesh alloy powder;

[0024] (2) Graphite column made by mixing materials: Graphite with a purity of 99.9% and the alloy powder obtained in step (1) are fully mixed according to the mass ratio of 1:1 and granulated with a granulator, and pressed into graphite column;

[0025] (3) Graphite column sintering: the graphite column obtained in step (2) was vacuum sintered at 400°C for 15 hours, and then reduced;

[0026] (4) Graphite column surface treatment: wrap the surface of the graphite column obtained in step (3) with 1mm thick pure iron as an oxygen r...

Embodiment 2

[0029] A method for preparing a surface-grooved diamond, comprising the following steps:

[0030] (1) Preparation of catalyst alloy powder: copper, manganese, chromium, niobium, and cobalt trace elements are added to the iron-based catalyst, and the catalyst alloy powder is composed of the following raw materials in mass percentage: 82.5% iron metal, 10% copper metal, and 2.5% manganese metal 1% of chromium metal, 1% of niobium, 3% of cobalt; then made into 250 mesh alloy powder;

[0031] (2) Graphite column made by mixing materials: Graphite with a purity of 99.9% and the alloy powder obtained in step (1) are fully mixed according to the mass ratio of 1:1 and granulated with a granulator, and pressed into graphite column;

[0032] (3) Graphite column sintering: the graphite column obtained in step (2) was vacuum sintered at 450°C for 12 hours, and then reduced;

[0033] (4) Graphite column surface treatment: wrap the surface of the graphite column obtained in step (3) with 1...

Embodiment 3

[0036] A method for preparing a surface-grooved diamond, comprising the following steps:

[0037] 1) Preparation of catalyst alloy powder: copper, manganese, chromium, niobium, and cobalt trace elements are added to the iron-based catalyst, and the catalyst alloy powder is composed of the following raw materials in mass percentage: iron 79%, copper 10%, manganese 3%, chromium 1.6% , niobium 1.6%, cobalt 4.8%; then made into 270 mesh alloy powder;

[0038] 2) Graphite column made by mixing materials: fully mix the graphite with a purity of 99.9% and the alloy powder obtained in step (1) according to the mass ratio of 1.2:1 and granulate it with a granulator, and press it into a graphite column;

[0039] 3) Graphite column sintering: the graphite column obtained in step (2) was vacuum sintered at 420°C for 17 hours, and then reduced;

[0040] 4) Graphite column surface treatment: wrap the surface of the graphite column obtained in step (3) with 1mm thick pure iron as an oxygen ...

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Abstract

The invention belongs to the technical field of diamond synthesis, and particularly relates to grooved-surface diamond. Catalyst alloy powder for synthesizing the grooved-surface diamond is composed of, by mass, 79-82.5% of iron, 10-12.5% of copper, 2.5-4.5% of manganese, 1.0-1.6% of chromium, 1.0-1.6% of niobium and 3.0-4.8% of cobalt. A preparation of the grooved-surface diamond mainly includes:preparing the catalyst alloy powder, mixing materials to prepare a graphite column, sintering the graphite column, treating the surface of the graphite column, and synthesizing at high temperature and high pressure. The grooved-surface diamond is coarse in surface and higher in self sharpness and wear resistance; diamond tools made of the grooved-surface diamond are suitable for high-load work; the grooved-surface diamond has a knife-grain-shaped coarse surface, so that favorable conditions are provided for chemical plating or electroplating.

Description

technical field [0001] The invention belongs to the technical field of diamond synthesis, and in particular relates to a catalyst alloy powder, a method for preparing surface-grooved diamonds by using the catalyst alloy powder, and diamond products and applications. Background technique [0002] The synthesis of synthetic diamond is usually carried out by a six-sided top press under high temperature and high pressure, and the graphite is converted into diamond through the action of an alloy catalyst. In this process, the metal catalyst not only participates in the formation of diamond nuclei under high temperature and pressure, but also affects the carbon source content in the process of the dispersion and growth of diamond nuclei. Therefore, the composition and proportion of the catalyst directly determine the quality and morphology of the synthesized diamond. At present, most of the diamonds synthesized by enterprises and organizations engaged in diamond synthesis at home...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06B22F1/00B22F3/10C22C38/20C22C38/26C22C38/30C22C38/38
CPCB01J3/062B01J2203/061B01J2203/0655B22F1/0003B22F3/1007B22F2999/00C22C38/20C22C38/26C22C38/30C22C38/38B22F2201/20
Inventor 刘乾坤张凤莲易良成武周军徐华雷曹通孙立伟
Owner ZHONGNAN DIAMOND CO LTD
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