Carbon contact strip, and preparation method and application thereof

A carbon skateboard and carbon technology, which is applied in transportation and packaging, railway vehicles, electric vehicles, etc., can solve the problem of poor mechanical properties, electrical conductivity and arc ablation resistance of carbon skateboards, and reduce the arc ablation resistance of carbon skateboards. , The occupational health of environmental employees has hidden dangers, etc., to achieve the effect of excellent arc ablation resistance, high specific heat capacity, and low burning resistance and heat resistance.

Active Publication Date: 2019-03-05
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages include: 1. A large amount of lead is used in the alloy, 15-20%
2. Extensive use of low melting point metals will reduce the arc ablation resistance of carbon slides
[0011] To sum up, in the background technology disclosed above, in the method of preparing carbon slides, most of the raw materials used are coke powder as the main body. Although the coke powder can improve wear resistance, the coke powder contains many impurities, and the specific heat capacity Low, low ablation resistance and heat resistance; some patent applications contain Pb in copper alloys, and the application of Pb has hidden dangers to the environment and occupational health of employees; some use C / C-Cu composite materials, and copper alloys However, due to the influence of other conditions such as process methods, the mechanical properties, electrical conductivity and arc ablation resistance of the prepared carbon slides are not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] In a second aspect, the present invention provides a method for preparing a carbon slide, wherein the method includes the following steps:

[0042] (1) Artificial graphite powder, petroleum coke powder, carbon black, MoS 2 Kneading with a binder, molding and / or extruding to obtain a green body;

[0043] (2) making a green body after carbonizing the green body;

[0044] (3) impregnating the preform in resin to obtain a carbon blank;

[0045] (4) Carrying out copper infiltration treatment with described carbon green body and copper and / or copper alloy;

[0046] Wherein, based on the total weight of the green body, the amount of the artificial graphite powder is 30-79% by weight, the amount of the petroleum coke powder is 7-36% by weight, and the amount of the carbon black is 1.5-79% by weight. 6 wt% of the MoS 2 The amount of the binder is 0.5-3% by weight, and the amount of the binder is 12-25% by weight. In the present invention, although the composition and compos...

Embodiment 1

[0074] This example is to illustrate the carbon sliding plate prepared by the preparation method of the present invention.

[0075] (1) Preparation of carbon body

[0076] Based on the total weight of the green body, the consumption of artificial graphite powder with a particle diameter of 40 μm is 55.4% by weight, the consumption of petroleum coke powder with a particle diameter of 15 μm is 19.8% by weight, and the consumption of 30nm carbon black is 4.0% by weight. % by weight, MoS 2 0.8% by weight, 20% by weight as the binder pitch, kneaded at 100°C for 3 hours, and molded at 60°C to obtain a green body;

[0077] (2) raising the green body to 1000°C at a heating rate of 0.1°C / min, and carbonizing at 1000°C for 3 hours to obtain a green body;

[0078] (3) impregnating the green body in pitch at 250°C to obtain an initial carbon green body;

[0079] (4) Raise the initial carbon green body to 1000°C at a heating rate of 0.1°C / min, and carbonize at 1000°C for 3 hours; then i...

Embodiment 2

[0083] This example is to illustrate the carbon sliding plate prepared by the preparation method of the present invention.

[0084] (1) Preparation of carbon body

[0085] Based on the total weight of the green body, the consumption of artificial graphite powder with a particle diameter of 50 μm is 39.6% by weight, the consumption of petroleum coke powder with a particle diameter of 15 μm is 33.3% by weight, and the consumption of 30nm carbon black is 5.5% by weight. % by weight, MoS 2 1.6% by weight, and 20% by weight as the binder pitch, kneaded at 150°C for 3 hours, and molded at 60°C to obtain a green body;

[0086] (2) raising the green body to 1300°C at a heating rate of 0.5°C / min, and carbonizing at 1300°C for 1 hour to obtain a green body;

[0087] (3) impregnating the green body in pitch at 350°C to obtain an initial carbon green body;

[0088] (4) Raise the initial carbon body to 1300°C at a heating rate of 0.5°C / min, and carbonize at 1300°C for 1 hour; then impre...

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Abstract

The invention relates to the field of conductive friction materials, and discloses a carbon contact strip, and a preparation method and application thereof. The carbon contact strip comprises a carbonbisque body, and copper and / or copper alloy infiltrating into the carbon bisque body, wherein the carbon bisque body is obtained by carbonizing a green body and immersing the carbonized green body inresin, and the green body contains, on the basis of taking the total weight of the green body as a reference, 38-70 wt% of artificial graphite powder, 7-36 wt% of petroleum coke powder, 1.5-6 wt% ofcarbon black, 0.5-3 wt% of MoS2 and 12-25 wt% of binder. The carbon contact strip of the present invention has a lower contact resistance, better mechanical properties, and superior arc erosion resistance.

Description

technical field [0001] The invention relates to the field of conductive friction materials, in particular to a carbon sliding plate and its preparation method and application. Background technique [0002] Application number 93111950.2 (CN1032741C) discloses a pantograph slide plate of electric locomotive and its manufacturing method, including the manufacture of carbon matrix carbon strips, impregnating the carbon strips with molten copper alloy, and machining the impregnated carbon strips into finished products , which is characterized by adding Fe with a weight ratio of less than 10% in the manufacturing formula of carbon matrix carbon strips 2 o 3 Powder, a manufacturing method and a product of an electric locomotive pantograph slide plate with 7-10% tin (Sn), 1-2% Si and 1-2% Ni added to molten copper alloy by weight. For its carbon material part, the raw materials are 65-75% raw pitch coke powder, 5-10% cryptocrystalline graphite powder, 5-10% channel black and less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52C04B35/622C04B41/88B60L5/20
CPCC04B35/52C04B35/622C04B41/5127C04B41/5133C04B41/88B60L5/205B60L2200/26C04B2235/425C04B2235/424C04B2235/404C04B2235/407C04B41/4535
Inventor 徐述荣郭少聪陈沛杭郭晓明
Owner BYD CO LTD
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