A kind of cu-mo-g electrical contact material and preparation method thereof

An electrical contact material, cu-mo-g technology, applied in contacts, circuits, electrical switches, etc., can solve the problems of uneven dispersion of graphite, poor interface between graphite and metal matrix, etc., and achieves less impurities and good quality. Resistance to material transfer, effect of reducing sintering temperature

Active Publication Date: 2022-07-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide a preparation method of Cu-Mo-G electrical contact material, which solves the problems of uneven dispersion of graphite in the metal matrix and poor interface bonding between graphite and metal matrix.

Method used

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  • A kind of cu-mo-g electrical contact material and preparation method thereof
  • A kind of cu-mo-g electrical contact material and preparation method thereof
  • A kind of cu-mo-g electrical contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, respectively weigh Cu: 89.8%, Mo: 10.0%, G: 0.2% by mass percentage, and the corresponding masses of Cu, Mo, and G are 161.64g, 18g, and 0.36g, respectively. Among them, Cu is 38μm dendritic powder, Mo is 10μm quasi-spherical powder, G is 10μm quasi-spherical powder, and the purity of each powder is ≥99.9%;

[0034] Step 2, mix the weighed Cu, Mo, G powders and ethanol according to a mass ratio of 9:1, and ultrasonically disperse them in an ultrasonic processor for 40 min to obtain a mixed solution;

[0035] Step 3, adding agate balls with a diameter of 5mm in the mixed solution according to the mass ratio of grinding ball:powder=1.5:1, then transferring to the heating and stirring device for mechanical stirring for 4h, the temperature is 100°C, and the stirring rate is 300rpm;

[0036] Step 4, put the above mixture into an oven with a temperature of 55° C. for 20 minutes to obtain a mixed powder of Cu-Mo-G;

[0037] Step 5, put the mixed powder into a graphite...

Embodiment 2

[0040] Step 1, respectively weigh Cu: 89.4%, Mo: 10.0%, G: 0.6% by mass percentage, and the corresponding masses of Cu, Mo and G are 160.92g, 18g and 1.08g respectively. Among them, Cu is 38μm dendritic powder, Mo is 10μm quasi-spherical powder, G is 10μm quasi-spherical powder, and the purity of each powder is ≥99.9%;

[0041] Step 2, mix the weighed Cu, Mo, G powders and ethanol according to a mass ratio of 9:1, and ultrasonically disperse them in an ultrasonic processor for 40 min to obtain a mixed solution;

[0042] Step 3, adding agate balls with a diameter of 5mm in the mixed solution according to the mass ratio of grinding ball:powder=1.5:1, and then transferring to the heating and stirring device for mechanical stirring for 4h, the temperature is 100°C, and the stirring rate is 300rpm;

[0043] Step 4, put the above mixture into an oven with a temperature of 55° C. for 20 minutes to obtain a mixed powder of Cu-Mo-G;

[0044]Step 5, put the mixed powder into a graphite...

Embodiment 3

[0047] Step 1, respectively weigh Cu: 89.0%, Mo: 10.0%, G: 1.0% by mass percentage, and the corresponding masses of Cu, Mo, and G are 160.2 g, 18 g, and 1.8 g, respectively. Among them, Cu is 38μm dendritic powder, Mo is 10μm quasi-spherical powder, G is 10μm quasi-spherical powder, and the purity of each powder is ≥99.9%;

[0048] Step 2, mix the weighed Cu, Mo, G powders and ethanol according to a mass ratio of 9:1, and ultrasonically disperse them in an ultrasonic processor for 40 min to obtain a mixed solution;

[0049] Step 3, adding agate balls with a diameter of 5mm in the mixed solution according to the mass ratio of grinding ball:powder=1.5:1, and then moving to the heating and stirring device for mechanical stirring for 4h, the temperature is 100 ° C, and the stirring rate is 300rpm;

[0050] Step 4, put the above mixture into an oven with a temperature of 55° C. for 20 minutes to obtain a mixed powder of Cu-Mo-G;

[0051] Step 5, put the mixed powder into a graphit...

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Abstract

The invention discloses a Cu-Mo-G electrical contact material, which comprises the following components by mass percentage: 88.8-93.8%; Mo 6.0-10.0%; and graphite 0.2-1.2%. The invention also discloses a preparation method of a Cu-Mo-G electrical contact material, which comprises the following steps: adding Cu powder, Mo powder and graphite powder weighed in proportion to an ethanol solution for ultrasonic dispersion, then adding grinding balls and Move to a heating and stirring device for mechanical stirring, then put the mixture into an oven to evaporate to dryness to obtain Cu-Mo-G mixed powder, and finally put the mixed powder into a graphite mold for pre-pressing, transfer it to a discharge plasma furnace for sintering, and cool it with the furnace At room temperature, the Cu-Mo-G electrical contact material is obtained. The Cu-Mo-G electrical contact material of the present invention has excellent mechanical-electrical properties, and also has good resistance to material transfer and arc erosion.

Description

technical field [0001] The invention belongs to the technical field of low-voltage copper-based contact materials, in particular to a Cu-Mo-G electrical contact material, and also relates to a preparation method of the copper-based electrical contact material. Background technique [0002] Electrical contacts undertake the tasks of making, carrying and breaking circuits, and are the key to achieving high reliability, high stability and long life of electrical systems. During service, the contacts are subject to repeated mechanical impact and arc erosion, resulting in continuous material wear and ablation. Therefore, the contact material is required not only to have excellent electrical and thermal conductivity and mechanical properties, but also to have good electrical properties such as arc erosion resistance and material transfer resistance. Cu-Mo material not only has the excellent electrical and thermal conductivity and strong plasticity of Cu, but also has the high har...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/05B22F3/105B22F1/06B22F1/065B22F1/12H01H1/025H01H1/027H01H11/04
CPCC22C9/00C22C1/05B22F3/105H01H1/025H01H1/027H01H11/048B22F2003/1051
Inventor 王献辉李贞倪菁艺许荣富刘继拓梁艳
Owner XIAN UNIV OF TECH
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