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Preparation method of boron carbide-coated diamond abrasive grains

A diamond and boron carbide technology is applied in the field of diamond material preparation to achieve the effects of reducing damage, improving bonding force and increasing plating rate

Inactive Publication Date: 2019-02-01
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems and deficiencies in the above-mentioned prior art, the present invention provides a preparation method of coated boron carbide diamond abrasive grains, and aims at the shortcomings of the existing diamond coating process such as complex process, high cost, and poor coating effect, and provides a coated boron carbide diamond abrasive grain. The preparation method of abrasive grains, the coating is dense and uniform, the cost is low, simple and efficient

Method used

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  • Preparation method of boron carbide-coated diamond abrasive grains
  • Preparation method of boron carbide-coated diamond abrasive grains
  • Preparation method of boron carbide-coated diamond abrasive grains

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A kind of preparation method step of plated boron carbide diamond abrasive grain is as follows:

[0029] (1) First, after cleaning the surface of 3.98 g of diamond, mix it with 0.33 g of boron powder (that is, the volume ratio of diamond: boron powder = 4:0.5) and place it in the graphite mold cavity, and place the graphite mold in spark plasma sintering furnace; the diamond particle size is 30 mesh, and the boron powder particle size is 300 mesh; the cleaning process of the diamond surface is as follows: the diamond is placed in a mixture of nitric acid and hydrochloric acid and boiled for 30 minutes under magnetic stirring, and then the diamond is taken out and rinsed twice with deionized water , the purpose of this process is to remove the grease on the surface of the diamond, and the degreasing process uses a magnetic stirrer for stirring;

[0030] (2) Vacuum the spark plasma sintering furnace to a vacuum degree of less than 100 Pa, pressurize the cavity of the grap...

Embodiment 2

[0032] A kind of preparation method step of plated boron carbide diamond abrasive grain is as follows:

[0033] (1) Firstly, after cleaning the surface of 3.98 g diamond, mix it with 0.99 g boron powder (i.e. volume ratio diamond: boron powder = 4:1.5) and place it in the graphite mold cavity, and place the graphite mold in spark plasma sintering furnace; the diamond particle size is 60 mesh, and the boron powder particle size is 1200 mesh; the cleaning process of the diamond surface is as follows: the diamond is placed in a mixture of nitric acid and hydrochloric acid and boiled for 30 minutes under magnetic stirring, and then the diamond is taken out and rinsed twice with deionized water , the purpose of this process is to remove the grease on the surface of the diamond, and the degreasing process uses a magnetic stirrer for stirring;

[0034] (2) Vacuum the spark plasma sintering furnace to a vacuum degree of less than 100 Pa, pressurize the cavity of the graphite mold to 1...

Embodiment 3

[0037] A kind of preparation method step of plated boron carbide diamond abrasive grain is as follows:

[0038] (1) Firstly, after cleaning the surface of 3.98 g diamond, mix it with 0.66 g boron powder according to the volume ratio of 4:1, then place it in the graphite mold cavity, and place the graphite mold in the discharge plasma sintering furnace; the diamond particle size is 50 The particle size of the boron powder is 500 mesh; the cleaning process of the diamond surface is as follows: the diamond is placed in a mixture of nitric acid and hydrochloric acid and boiled for 30 minutes under magnetic stirring, and then the diamond is taken out and rinsed twice with deionized water. The purpose of this process is to remove the diamond The grease on the surface is stirred by a magnetic stirrer during the degreasing process;

[0039](2) Vacuum the spark plasma sintering furnace to a vacuum degree of less than 100 Pa, pressurize the cavity of the graphite mold to 10 MPa, raise t...

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Abstract

The invention discloses a preparation method of boron carbide-coated diamond abrasive grains. The preparation method comprises: cleaning diamond surface, uniformly mixing diamond and boron powder, putting the mixture into a mold, putting the mold into a discharge plasma sintering furnace, carrying out sintering at a vacuum degree of less than 100Pa and a sintering temperature of 1200 to 1400 DEG C, keeping the temperature for 10-15min, then carrying out furnace cooling, grinding and screening the cooled and sintered mixture, cleaning the mixture and drying the mixture in vacuum to obtain boroncarbide-coated diamond. The preparation method has the advantages of simple processes, uniform coating and low cost. The boron carbide-coated diamond has good adhesion to metal or a ceramic binder sothat the premature detachment of the diamond is reduced and the service life and processing efficiency of the product are improved.

Description

technical field [0001] The invention belongs to the technical field of diamond material preparation, and in particular relates to a preparation method of plated boron carbide diamond abrasive grains. Background technique [0002] Diamond has a series of excellent properties such as high hardness, high wear resistance, high thermal conductivity and electrical insulation. Diamond tools prepared by embedding diamond particles into the matrix have become indispensable tools for processing various hard materials. Such as grinding wheels, drill bits and cutting tools, etc. These tools have been widely used in stone processing, architectural decoration, national defense, optical glass processing and other fields. [0003] In diamond tools, the main cutting function is the diamond embedded in the matrix material. The performance and service life of the tool depend on the bond strength between the diamond particles and the matrix material. Diamond is composed of carbon elements, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/87C09K3/14
CPCC04B41/009C04B41/5058C04B41/87C09K3/1436C04B35/52C04B41/0072C04B41/4515C04B41/4556
Inventor 穆云超王志新马明星
Owner ZHONGYUAN ENGINEERING COLLEGE
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