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Production method for composite carbon graphite material

A composite material and production method technology, applied in the field of non-metallic materials, can solve problems such as low strength and achieve the effect of excellent wear resistance

Inactive Publication Date: 2009-09-30
WUXI ZHONGQIANG ELECTRIC CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above are the excellent properties of carbon graphite materials. The natural disadvantages of carbon graphite materials are brittleness and low strength. Therefore, in some occasions where the working conditions are harsh and there are special requirements for carbon graphite materials, their own performance can no longer meet the needs, so they can only be borrowed. The performance of other materials to make up for the shortcomings of carbon graphite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The production method of the carbon-graphite composite material of the present invention adopts the following process steps: its formula ratio is calculated in parts by weight:

[0029] 1. Carbon powder preparation:

[0030] (1) Put 80 parts of pitch coke powder and 8 parts of carbon black in a 200-liter kneading kettle; knead for 0.8 hours; start the heating equipment of the kneading kettle at the same time, heat for 0.8 hours, and the temperature rises to 110 ° C; add molten coal tar pitch 35 parts, the temperature of molten coal tar pitch is 150°C; continue kneading and the temperature rises to 145°C, and keep kneading for 2.5 hours to get out of the kneading kettle as carbon powder;

[0031] (2), 60 parts of carbon powder and 40 parts of molten coal tar pitch are hot-rolled into 1.8mm thick sheets, pressure: 24MPa / cm 2 ; After cooling, grind it into a powder of ≤300 mesh, cooling temperature: 24°C. Coal tar pitch accounts for about 30% of the total powder.

[003...

Embodiment 2

[0050] The production method of the carbon-graphite composite material of the present invention adopts the following process steps: its formula ratio is calculated in parts by weight:

[0051] 1. Carbon powder preparation:

[0052](1) Put 90 parts of pitch coke powder and 10 parts of carbon black in a 200-liter kneading kettle; knead for 1 hour; start the heating equipment of the kneading kettle at the same time, heat for 1 hour, and the temperature rises to 115 ° C; add molten coal tar pitch 38 parts, the temperature of molten coal tar pitch is 160°C; continue kneading and the temperature rises to 150°C, and keep kneading for 2.8 hours to get out of the kneading kettle as carbon powder;

[0053] (2) Take 70 parts of the above-mentioned carbon powder and 30 parts of molten coal tar pitch and hot-roll it into a 2mm thick sheet, pressure: 25MPa / cm 2 ; After cooling, grind it into a powder of ≤300 mesh, cooling temperature: 25°C. Coal tar pitch accounts for about 30% of the tot...

Embodiment 3

[0068] The production method of the carbon-graphite composite material of the present invention adopts the following process steps: its formula ratio is calculated in parts by weight:

[0069] 1. Carbon powder preparation:

[0070] (1) Put 100 parts of pitch coke powder and 12 parts of carbon black in a 200-liter kneading kettle; knead for 1.2 hours; start the heating equipment of the kneading kettle at the same time, heat for 1.2 hours, and the temperature rises to 120 ° C; add molten coal tar pitch 40 parts, the temperature of the molten coal tar pitch is 170°C; continue to knead the temperature to 155°C, and keep kneading for 3.5 hours to get out of the kneading kettle as carbon powder;

[0071] (2) Take 65 parts of the above-mentioned carbon powder and 35 parts of molten coal tar pitch and hot-roll it into a 2.2mm thick sheet, pressure: 28MPa / cm 2 ; After cooling, grind it into a powder of ≤300 mesh, cooling temperature: 28°C. Coal tar pitch accounts for about 30% of the...

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Abstract

The invention relates to a production method for a composite carbon graphite material. The method comprises the following steps: putting pitch coke powder and carbon black in a kneading kettle for mixed kneading, adding melted coal pitch heating and keeping the temperature to obtain carbon powder; putting three carbon fibers in a mixing tank and adding a polyvinyl alcohol aqueous solution to prepare a carbon fiber mixed solution; and adding the carbon powder and the carbon fiber mixed solution to the kneading kettle for mixed kneading, press forming, high-temperature roasting, coal pitch soakage, secondary high-temperature roasting, rough turning, resin soakage, machine processing, secondary resin soakage and grinding into powder. The prepared carbon powder and short fibers are roasted into the composite carbon graphite material which improves the thermal shock resistance, the strength and the impact resistance by 50 percent to 100 percent than a common carbon material and has excellent wearing resistance, thereby being a first-choice carbon graphite material in the aeronautical and astronautic industry and the war industry.

Description

technical field [0001] The invention relates to a production method of a carbon-graphite composite material, and specifically belongs to the technical field of non-metallic materials. Background technique [0002] For half a century, only a handful of new materials invented in the world can be applied to actual production. Most of them follow the path of composite materials. Two or more materials are mixed together to learn from each other. Improve material properties to meet product requirements. Carbon graphite material has many excellent characteristics and is widely used: 1. It has good self-lubrication and low friction coefficient. 2. Good corrosion resistance. 3. It has good temperature resistance. 4. Good thermal conductivity and low coefficient of linear expansion. 5. The pairing performance is good. 6. Easy to process. [0003] The above are the excellent properties of carbon graphite materials. The natural disadvantages of carbon graphite materials are brittl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/83C04B35/52
Inventor 吴强
Owner WUXI ZHONGQIANG ELECTRIC CARBON CO LTD
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