Powder-shaped adhesive for diamond composite sheet and preparation method thereof

A diamond composite sheet and powdery technology, which is applied in the field of superhard material products, can solve the problems of narrow sintering range, poor quality consistency, unsuitable for large-scale production, etc., and achieve the effect of avoiding serious influence and uniform structure

Active Publication Date: 2013-01-30

河南亚龙金刚石制品股份有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of poor quality consistency, narrow sintering range, poor production stability and unsuitable for large-scale production in the production process of diamond composite sheets in the prior art, the present invention provides a powd...

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Abstract

The invention relates to powder-shaped adhesive for a diamond composite sheet. The powder-shaped adhesive is composed of the following raw materials by weight: 70-75% of cobalt, 2-75% of boron carbide, 3-5% of silver, 0.5-1.5% of silicon and the balance of graphene. The preparation method of powder catalyst includes: placing the cobalt, the boron carbide, the silver and the silicon into a ball mill by proportion, grinding the mixture for 4-6 hours, smelting the mixture in a high-temperature furnace, performing cooling through high-purity nitrogen, and breaking the mixture into metal powder with the granularity of 1-2mum; and mixing the obtained powder with graphene powder according to proportion, mixing the mixture in a three-dimensional blender mixer for 4-6 hours, and finally performing surface purification treatment in a vacuum furnace to obtain the powder-shaped adhesive for the diamond composite sheet. The diamond composite sheet synthetized by the powder-shaped adhesive serving as padding has the remarkable advantages of being low in sintering temperature, wide in technological range, good in production stability, high in finished product rate and the like.

Technology Topic

Vacuum furnaceCvd graphene +12

Examples

Experimental program(5)

Example Embodiment

[0019] Example 1

[0020] The powdery adhesive for a diamond composite sheet of this embodiment is made of raw materials with the following weight ratios: 70 parts cobalt, 3 parts boron carbide, 5 parts silver, 1.5 parts silicon, and the balance is graphene.

[0021] The aforementioned cobalt is carbonyl cobalt powder with an average particle size of 1 μm and a purity of 99.9% or more; graphene is composed of 2-10 carbon layers called multilayer graphene; the boron carbide and silver are both powders with a purity of 99.7% or more .

[0022] The above-mentioned powdery adhesive for a diamond composite sheet is a pre-alloyed powder with an average particle size of 1-2 μm.

[0023] The powdery adhesive for the diamond composite sheet of this embodiment is prepared by the following steps:

[0024] (1) Ingredients: Weigh the following raw materials according to the following weight ratio: 70 parts of cobalt, 3 parts of boron carbide, 5 parts of silver, and 1.5 parts of silicon.

[0025] (2) Mixing: Pour the material obtained in step 1 into a mixing tank, and then add cemented carbide balls of the same weight and a diameter of 5mm as the mixing medium into the mixing tank, and install it on the three-dimensional mixer for mixing The mixing time is 4 hours.

[0026] (3) Pulverization: first put the material obtained in step 2 into a high-temperature furnace for smelting, temperature: 1350℃, time: 1 hour, to obtain the molten material of the above ingredients; then spray the melt through a high-pressure nozzle, The pure nitrogen blows the sprayed molten liquid to the alloy powder. After the powder is prepared, particle size classification is required. Only the powder with a particle size of 2μm is selected for use, and other particle sizes need to be re-melted to make powder.

[0027] (4) Ingredients: Add graphene powder with a weight ratio of 20.5% to the alloy powder obtained in step 3, and place it in a three-dimensional mixer to mix evenly to obtain a premixed powder.

[0028] (5) Sintering: Place the premixed powder obtained in step 4 in a boat made of molybdenum metal, and then place it in a vacuum furnace for processing. The process is temperature: 950°C, and vacuum degree is 10 -2 Pa, time: 3 hours, a powdery adhesive for diamond composite sheets can be obtained.

[0029] The powder obtained by this method was used to make diamond composite sheets, and a total of 1200 pieces were produced. The situation is as follows:

[0030] Test items Synthesis process time Yield Average wear ratio Happening 7min 95.83 210,000

Example Embodiment

[0031] Example 2

[0032] The powdery adhesive for a diamond composite sheet of this embodiment is made of raw materials with the following weight ratios: 73 parts of cobalt, 2.5 parts of boron carbide, 4 parts of silver, 1 part of silicon, and the balance being graphene.

[0033] The aforementioned cobalt is carbonyl cobalt powder with an average particle size of 1 μm and a purity of 99.9% or more; graphene is composed of 2-10 carbon layers called multilayer graphene; the boron carbide and silver are both powders with a purity of 99.7% or more .

[0034] The above-mentioned powdery adhesive for a diamond composite sheet is a pre-alloyed powder with an average particle size of 1-2 μm.

[0035] The powdery adhesive for the diamond composite sheet of this embodiment is prepared by the following steps:

[0036] (1) Ingredients: Weigh the following raw materials according to the following weight ratio: cobalt: 73 parts, boron carbide 2.5 parts, silver 4 parts, silicon: 1 part.

[0037] (2) Mixing: Pour the material obtained in step 1 into a mixing tank, and then add cemented carbide balls with the same weight and a diameter of 8mm into the mixing tank as the mixing medium, and install it on the three-dimensional mixer for mixing. The mixing time is 6 hours.

[0038] (3) Powdering: first put the material obtained in step 2 into a high-temperature furnace for smelting, temperature: 1320℃, time: 2 hours, to obtain the melt of the above ingredients; then spray the melt through a high-pressure nozzle, The pure nitrogen blows the sprayed molten liquid to the alloy powder. After the powder is prepared, particle size classification is required. Only powder with a particle size of 1 μm is selected for use, and other particle sizes need to be re-melted to make powder.

[0039] (4) Ingredients: Add graphene powder with a weight ratio of 19.5% to the alloy powder obtained in step 3, and place it in a three-dimensional mixer to mix evenly to obtain a premixed powder.

[0040] (5) Sintering: Put the premixed powder obtained in step 4 into a vacuum furnace for processing, the process is temperature: 950℃, vacuum degree is 10 -2 Pa, time: 3 hours, a powdery adhesive for diamond composite sheets can be obtained.

[0041] The powder obtained by this method was used to make diamond composite sheets, and a total of 1200 pieces were produced. The situation is as follows:

[0042] Test items Synthesis process time Yield Average wear ratio Happening 7.5min 96 213,000

Example Embodiment

[0043] Example 3

[0044] The powdery adhesive for a diamond composite sheet of this embodiment is made of raw materials with the following weight ratios: 75 parts of cobalt, 2 parts of boron carbide, 4 parts of silver, 0.5 parts of silicon, and the balance being graphene.

[0045] The aforementioned cobalt is carbonyl cobalt powder with an average particle size of 1 μm and a purity of 99.9% or more; graphene is composed of 2-10 carbon layers called multilayer graphene; the boron carbide and silver are both powders with a purity of 99.7% or more .

[0046] The above-mentioned powdery adhesive for a diamond composite sheet is a pre-alloyed powder with an average particle size of 1-2 μm.

[0047] The powdery adhesive for the diamond composite sheet of this embodiment is prepared by the following steps:

[0048] (1) Ingredients: Weigh the following raw materials according to the following weight ratio: 75 parts of cobalt, 2 parts of boron carbide, 4 parts of silver, and 0.5 parts of silicon.

[0049] (2) Mixing: Pour the material obtained in step 1 into a mixing tank, and then add cemented carbide balls of the same weight and a diameter of 6mm as the mixing medium into the mixing tank, and install it on the three-dimensional mixer for mixing The mixing time is 5 hours.

[0050] (3) Powdering: first put the material obtained in step 2 into a high-temperature furnace for smelting, temperature: 1320℃, time: 2 hours, to obtain the melt of the above ingredients; then spray the melt through a high-pressure nozzle, The pure nitrogen blows the sprayed molten liquid to the alloy powder. After the powder is prepared, particle size classification is required. Only the powder with a particle size of 1.5μm is selected for use, and other particle sizes need to be re-melted to make powder.

[0051] (4) Ingredients: Add graphene powder with a weight ratio of 18.5% to the alloy powder obtained in step 3, and place it in a three-dimensional mixer to mix uniformly to obtain a premixed powder.

[0052] (5) Sintering: Put the premixed powder obtained in step 4 into a vacuum furnace for processing, the process is temperature: 950℃, vacuum degree is 10 -2 Pa, time: 4 hours, a powdery adhesive for diamond composite sheets can be obtained.

[0053] The powder obtained by this method is used to make diamond composite sheets, and a total of 1,000 sheets are produced. The situation is as follows:

[0054] Test items Synthesis process time Yield Average wear ratio Happening 8min 95 250000

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Uniform tissue
Avoid serious impact

Powder-shaped adhesive for diamond composite sheet and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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