A copper-based electrical contact composite material and its preparation method

A composite material and electrical contact technology, applied in contacts, circuits, electrical switches, etc., can solve the problems of long sintering time, easy grain growth, and large energy consumption, and achieve shortened production cycle and high electrical conductivity , the effect of increasing the surface area

Inactive Publication Date: 2017-12-05
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The second object of the present invention is to provide a method for preparing copper-based electrical contact composite materials, which solves the problems of too long sintering time, large energy consumption and easy growth of crystal grains in existing preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The copper-based electrical contact composite material of this embodiment is composed of the following components in mass percentage: chromium 20%, tungsten carbide 3%, and the balance is copper.

[0028] The preparation method of the copper-based electrical contact composite material of this embodiment comprises the following steps:

[0029] 1) Take raw chromium powder with a particle size range of 50-200 μm and a median particle size of 100 μm, and raw material tungsten carbide powder with a particle size range of 30-80 μm and a median particle size of 50 μm, and place them in a high-energy ball mill tank respectively. The mass ratio of the material is 15:1, adding grinding balls for ball milling, the speed of the ball mill is 400r / min, and the ball milling time is 15h, respectively to obtain chromium powder with a particle size of 35-150 μm and tungsten carbide powder with a particle size of 10-50 μm;

[0030] 2) Measure the chromium powder, tungsten carbide powder a...

Embodiment 2

[0034] The copper-based electrical contact composite material of this embodiment is composed of the following components in mass percentage: 10% chromium, 1% tungsten carbide, and the balance is copper.

[0035] The preparation method of the copper-based electrical contact composite material of this embodiment comprises the following steps:

[0036] 1) Take raw chromium powder with a particle size range of 50-200 μm and a median particle size of 100 μm, and raw material tungsten carbide powder with a particle size range of 30-80 μm and a median particle size of 50 μm, and place them in a high-energy ball mill tank respectively. The mass ratio of the material is 15:1, adding grinding balls for ball milling, the speed of the ball mill is 400r / min, and the ball milling time is 10h, respectively to obtain chromium powder with a particle size of 35-150 μm and tungsten carbide powder with a particle size of 10-50 μm;

[0037]2) Measure the chromium powder, tungsten carbide powder an...

Embodiment 3

[0041] The copper-based electrical contact composite material in this embodiment is composed of the following components in mass percentage: 30% chromium, 5% tungsten carbide, and the balance is copper.

[0042] The preparation method of the copper-based electrical contact composite material of this embodiment comprises the following steps:

[0043] 1) Take raw chromium powder with a particle size range of 50-200 μm and a median particle size of 100 μm, and raw material tungsten carbide powder with a particle size range of 30-80 μm and a median particle size of 50 μm, and place them in a high-energy ball mill tank respectively. The mass ratio of the material is 15:1, adding grinding balls for ball milling, the speed of the ball mill is 400r / min, and the ball milling time is 20h, respectively to obtain chromium powder with a particle size of 35-150 μm and tungsten carbide powder with a particle size of 10-50 μm;

[0044] 2) Measure the chromium powder, tungsten carbide powder a...

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Abstract

The invention discloses a copper-based electrical contact composite material and a preparation method thereof, belonging to the technical field of metal composite material preparation. The copper-based electrical contact composite material is composed of the following components in mass percentage: 10%-30% of chromium, 1%-5% of tungsten carbide, and the balance is copper. The copper-based electrical contact composite material of the invention has high density, uniform structure, high electrical conductivity and good arc erosion resistance. In the preparation method of the present invention, after mixing chromium powder, tungsten carbide powder and copper powder, a copper-chromium-tungsten carbide composite material is prepared by using a discharge plasma sintering process; Electrical conductivity and wear resistance, as well as high electrical conductivity and thermal conductivity of copper; the preparation method is controllable and environmentally friendly, the process is simple, the cost is low and the production cycle is short, and the arc erosion resistance, welding resistance, strength and conductivity are achieved. The preparation of the electrical contact composite material with high performance is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of metal composite material preparation, and in particular relates to a copper-based electrical contact composite material and a preparation method thereof. Background technique [0002] Electrical contact materials are very important components in switching appliances and electronic instruments and meters. They directly play the role of breaking and connecting circuits and bear the function of normal working current. Their performance is related to the normal operation and service life of switching appliances important role. Copper-chromium materials have been used in vacuum switches as early as the 1970s, mainly for high-voltage and high-current applications in vacuum. Most of the research on copper-chromium alloys has been conducted, while relatively few studies have been conducted on copper-chromium composite materials. An alloy containing copper, chromium, and tungsten carbide has better performance. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05H01H1/025H01H11/04
Inventor 刘勇朱顺新李国辉田保红张毅宋克兴国秀花
Owner HENAN UNIV OF SCI & TECH
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