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Synthetic process of high self-sharpening diamond

A synthesis process and diamond technology, applied in the field of high self-sharpening diamond synthesis technology, can solve the problems of short service life and poor self-sharpening of diamond abrasive grains, and achieve the effect of improving service life, good self-sharpening and low strength

Active Publication Date: 2013-02-27
山东昌润钻石股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of poor self-sharpening and short service life of diamond abrasive grains existing in the above-mentioned prior art, the purpose of the present invention is to provide a synthesis process of high self-sharpening diamond, so as to improve the service life of diamond in fields such as abrasive tool cutting

Method used

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  • Synthetic process of high self-sharpening diamond
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  • Synthetic process of high self-sharpening diamond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 Concrete synthetic process step is:

[0049] ①Take 400 mesh or more fine graphite powder and Mn-based alloy catalyst powder, and mix the raw materials at a weight ratio of 6:4. The components of the Mn-based alloy catalyst powder are calculated by weight percentage: Ni: 15%, Cu: 8 %, Fe: 1%, Cr: 0.06%, V: 0.02%, Ce: 0.001%, dispersant: 1.2%, and the balance is Mn;

[0050] ②Put the raw materials in step ① into the three-dimensional mixer and mix for 6 hours. After isostatic pressing at 100MPa, crush them into fine particles with a size of 90 mesh or more, and then put them in a vacuum furnace for 58 minutes at 900°C to fully remove oxygen. Cool down to room temperature to obtain the mixed material;

[0051] ③Put the mixed material into the mold, and then press it into a columnar core column on a four-column press. The size of the core column is Φ40mm×31.5mm, and the density of the core column is 3.4g / cm 3 ;

[0052] ④Put the core column into the diamond ...

Embodiment 2

[0057] Embodiment 2 Concrete synthetic process steps are:

[0058] ①Take 400 mesh finer graphite powder and Mn-based alloy catalyst powder, and mix the raw materials in a ratio of 6:9 by weight. The components of Mn-based alloy catalyst powder are calculated by weight percentage: Ni: 21%, Cu: 11 %, Fe: 2%, Cr: 0.07%, V: 0.04%, Ce: 0.003%, dispersant: 1.8%, and the balance is Mn;

[0059] ②Put the raw materials of step ① into the three-dimensional mixer and mix for 7 hours. After isostatic pressing at 200MPa, crush them into fine particles of 90 mesh or less, and then put them in a vacuum furnace for 65 minutes at 1000°C to fully remove oxygen. Cool down to room temperature to obtain the mixed material;

[0060] ③Put the mixed material into the mold, and then press it into a columnar core column on a four-column press. The size of the core column is Φ40mm×31.5mm, and the density of the core column is 3.7g / cm 3 ;

[0061] ④ Put the core column into the diamond synthesis block...

Embodiment 3

[0066] Embodiment 3 Concrete synthetic process steps are:

[0067] ①Take 400 mesh finer graphite powder and Mn-based alloy catalyst powder, and mix the raw materials at a ratio of 6:7 by weight. The components of Mn-based alloy catalyst powder are calculated by weight percentage: Ni: 18%, Cu: 9.5 %, Fe: 1.5%, Cr: 0.065%, V: 0.03%, Ce: 0.002%, sodium lauryl sulfate: 1.5%, and the balance is Mn;

[0068] ②Put the raw materials in step ① into the three-dimensional mixer and mix for 6.5 hours. After isostatic pressing at 150MPa, crush them into fine particles of 90 mesh or less, and then put them in a vacuum furnace for 62 minutes at 950°C to fully remove oxygen. Cool down to room temperature naturally to obtain the mixed material;

[0069] ③Put the mixed material into the mold, and then press it into a columnar core column on a four-column press. The size of the core column is Φ40mm×31.5mm, and the density of the core column is 3.6g / cm 3 ;

[0070] ④Put the core column into th...

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Abstract

The invention provides a synthetic process of a high self-sharpening diamond. The synthetic process includes that graphite powders and Mn based alloy catalyst powders are mixed according to a weight ratio of 6: (4-9) to obtain a mixture, the mixture is subjected to isostatic pressing and vacuum treatment, the mixture is subjected to compression molding in a four-column press machine, a core column is placed in a diamond synthetic block, the diamond synthetic block is placed in a 6-surface diamond press machine for synthesis, the actual synthesis pressure is in a range from 6.2-6.8 GPa, the synthesis temperature is in a range from 1210 DEG C to 1250 DEG C, and the actual synthesis pressure and the synthesis temperature are completed by a control pressure curve and a power curve respectively. According to the synthetic process of the high self-sharpening diamond, the synthesized high self-sharpening diamond accords with the national synthetic diamond inspection standard, the yield per unit reaches to above 100catars, the crystal forms are not regular, the needle flake shaped crystal forms account for above 75%, the impact toughness (TI) detection is in a range between 15% and 25%, the intensity is low, and the edge tip and the grinding are sharp.

Description

technical field [0001] The invention relates to the technical field of diamond synthesis, in particular to a synthesis process of high self-sharpening diamond. [0002] Background technique [0003] With its excellent mechanical, physical and chemical properties, diamond is used as an industrial material for cutting, grinding, drilling and other tools, especially as a super abrasive introduced into the grinding industry to significantly improve the processing efficiency and quality of parts The service life of the grinding wheel is extended, and the dimensional stability of the processed parts is improved. In the prior art, the self-sharpness of diamond is not high enough, and the surface is smooth and rough enough, and the mechanical bond with the bonding agent is not strong enough, which may easily cause the diamond abrasive grains to fall off prematurely during use. According to statistics, 2 / 3 of the diamond abrasive grains in ordinary diamond grinding wheels fall off ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06
Inventor 林秀峰白云岗王广阁
Owner 山东昌润钻石股份有限公司
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