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Self-sharpening diamond and preparation method thereof

A diamond, self-sharpening technology, applied in the diamond field, can solve problems such as low utilization rate and waste of resources

Active Publication Date: 2021-03-16
内蒙古唐合科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when diamond is used in some hard materials (such as zirconia-related materials, cemented carbide, stainless steel, etc.), it has a low utilization rate, which is easy to cause waste of resources

Method used

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  • Self-sharpening diamond and preparation method thereof
  • Self-sharpening diamond and preparation method thereof
  • Self-sharpening diamond and preparation method thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing the self-sharpening diamond described in the above technical solution, comprising the following steps:

[0035] According to the ratio of raw materials, cobalt, nickel, cerium, boron and graphite are mixed and pressed to form graphite columns;

[0036] The graphite column is sequentially subjected to nitriding treatment and press synthesis to obtain the self-sharpening diamond.

[0037] The invention mixes cobalt, nickel, cerium, boron and graphite according to the ratio of raw materials and presses them to obtain graphite columns. In the present invention, the cobalt is preferably cobalt powder, and the particle size of the cobalt powder is preferably ≤48 μm, more preferably 45˜47.5 μm. In the present invention, the nickel is preferably nickel powder, and the particle size of the nickel powder is preferably ≤48 μm, more preferably 45˜47.5 μm. In the present invention, the cerium is preferably cerium powder, a...

Embodiment 1

[0064] 30Kg particle diameter is the cobalt powder of 48 μm, 10Kg particle diameter is the nickel powder of 48 μm, 2Kg particle diameter is the cerium powder of 48 μm, 1Kg particle diameter is that the boron powder of 48 μm and 55Kg particle diameter are the graphite powder that 48 μm purity is 99.999% ( Graphitization treatment at 2900°C for 26 days) mixed in a three-dimensional mixer for 24 hours to obtain a mixture;

[0065] The mixture was isostatically pressed at 190 MPa for 15 minutes to obtain a cylinder with a diameter of 200 mm and a height of 500 mm; the cylinder was crushed into particles with a particle diameter of about 3 mm; 200 g of the crushed particles were crushed in a four-column press (60MPa, 5s) upper pressing obtains that diameter is 48mm, and height is the graphite column of 40mm;

[0066] Put the graphite column into a nitriding container, vacuumize it, fill it with nitrogen, and carry out nitriding treatment under the pressure of 0.6MPa for 24 hours; p...

Embodiment 2

[0070] 28Kg of cobalt powder with a particle size of 48 μm, 9Kg of nickel powder with a particle size of 48 μm, 1.9Kg of cerium powder with a particle size of 48 μm, 0.9Kg of boron powder with a particle size of 48 μm and 57Kg of graphite with a particle size of 48 μm and a purity of 99.999% Powder (graphitized at 2900°C for 28 days) was mixed in a three-dimensional mixer for 24 hours to obtain a mixture;

[0071] The mixture was isostatically pressed at 190MPa for 15 minutes to obtain a cylinder with a diameter of 200mm and a height of 500mm; the cylinder was broken into particles with a particle diameter of about 3mm; Press on the machine (60MPa, 5s) to obtain a diameter of 48mm, a graphite column that is 40mm high;

[0072] Put the graphite column into a nitriding container, vacuumize it, fill it with nitrogen, and carry out nitriding treatment under the pressure of 0.6MPa for 24 hours; put the graphite column after nitriding into a steel cup with a thickness of 0.3mm, and ...

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Abstract

The invention belongs to the technical field of diamonds, and particularly relates to a self-sharpening diamond and a preparation method thereof. The self-sharpening diamond provided by the inventionis prepared by nitriding a graphite column; the graphite column comprises the following components in percentage by mass: 28-31% of cobalt, 9-12% of nickel, 1.8-2% of cerium, 0.8-1% of boron and 55-59% of graphite. According to the method, the surfaces of the self-sharpening diamond particles are rough due to the specific content of cerium, so that the self-sharpening diamond falls off in a micro-blade crushing mode in the grinding process to expose a new sharp surface, the self-sharpening diamond keeps a continuous sharp surface, and the utilization rate of the self-sharpening diamond is increased; meanwhile, the self-sharpening diamond provided by the invention is subjected to nitriding treatment in the preparation process, so that nitrogen atoms replace part of carbon atoms in the diamond in the synthesis process of the diamond, and the strength of the self-sharpening diamond is reduced.

Description

technical field [0001] The invention belongs to the technical field of diamonds, in particular to a self-sharpening diamond and a preparation method thereof. Background technique [0002] As the hardest substance in nature, diamond is mainly used in cutting, grinding, polishing, drilling and other fields. With the continuous development of science and technology, the application fields of diamond have been expanding in recent years, involving various industries such as weapons, aerospace, stone building materials, semiconductors, photovoltaic industry, gemstones, mining, automotive machinery, electronic appliances, etc. The amount of diamonds is also increasing year by year. However, when diamond is used in some hard materials (such as zirconia-related materials, hard alloys, stainless steel, etc.), it has a low utilization rate, which is easy to cause waste of resources. [0003] It is an urgent technical problem to prepare diamonds with higher utilization rate to reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06B01J3/04
CPCB01J3/062B01J3/065B01J3/04B01J2203/0655
Inventor 周建沈建民唐暻晶张鑫男
Owner 内蒙古唐合科技有限公司