Silver-based contact material with high fusion welding resistance and preparation method of silver-based contact material

A contact material and welding-resistant technology, which is applied in the field of low-voltage contact materials, can solve the problems of poor welding resistance and achieve the effects of improving poor welding resistance, arc erosion resistance and material transfer resistance

Active Publication Date: 2018-07-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a silver-based contact material with high welding resistance, which solves the problem of poor welding resistance of existing electrical contact materials

Method used

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  • Silver-based contact material with high fusion welding resistance and preparation method of silver-based contact material
  • Silver-based contact material with high fusion welding resistance and preparation method of silver-based contact material
  • Silver-based contact material with high fusion welding resistance and preparation method of silver-based contact material

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preparation example Construction

[0023] A kind of preparation method specific process of the silver-based contact material with high anti-welding performance is as follows figure 1 As shown, the specific operation steps are as follows:

[0024] Step 1, weighing the following materials according to the mass percentage: 2% to 15% of Ni powder with a purity of not less than 99.9% and a particle size of 50nm, and TiB with a purity of not less than 99.9% and a particle size of 50nm 2 2% to 8% Ag powder and 77% to 96% Ag powder with a purity of not less than 99.9% and a particle size of 72 μm, the sum of the mass percentages of the above components is 100%;

[0025] Step 2, the weighed Ag powder, Ni powder and TiB 2 Put the powder into a ball mill, add absolute ethanol and polyvinylpyrrolidone to pre-mix the powder, the speed of the ball mill is 250-350r / min, and mix the powder for 4-8 hours to obtain the pre-mixed powder;

[0026] Step 3, put the pre-mixed powder into the three-dimensional powder mixer for re-mi...

Embodiment 1

[0033] Step 1, weigh the following materials according to the mass percentage: 2% Ni powder with a purity of not less than 99.9% and a particle size of 50nm, TiB with a purity of not less than 99.9% and a particle size of 50nm 2 2% Ag powder with a purity of not less than 99.9%, 96% of Ag powder with a particle size of 72 μm, and the sum of the mass percentages of the above components is 100%;

[0034] Step 2, the weighed Ag powder, Ni powder and TiB 2 Put the powder into a ball mill, and add absolute ethanol and polyvinylpyrrolidone to pre-mix the powder. 2 0.5% and 0.5% of the total mass of the powder, the speed of the ball mill is 250r / min, and the powder is mixed for 4 hours to obtain the premixed powder;

[0035] Step 3, put the pre-mixed powder into the three-dimensional powder mixer for re-mixing, the vibration frequency is 30Hz, and the mixing time is 2h, to obtain the mixed powder;

[0036] Step 4, put the mixed powder after re-mixing in step 3 into a mold for press...

Embodiment 2

[0039] Step 1, weigh the following materials according to mass percentage: 15% of Ni powder with a purity of not less than 99.9% and a particle size of 50nm, TiB with a purity of not less than 99.9% and a particle size of 50nm 2 8% Ag powder with a purity of not less than 99.9%, 77% of Ag powder with a particle size of 72 μm, and the sum of the mass percentages of the above components is 100%;

[0040] Step 2, the weighed Ag powder, Ni powder and TiB 2 Put the powder into a ball mill, and add absolute ethanol and polyvinylpyrrolidone to pre-mix the powder.2 1.2% and 2.0% of the total mass of the powder, the speed of the ball mill is 350r / min, and the powder is mixed for 8 hours to obtain the premixed powder;

[0041] Step 3, put the pre-mixed powder into the three-dimensional powder mixer for re-mixing, the vibration frequency is 40Hz, and the mixing time is 6h to obtain the mixed powder;

[0042] Step 4, put the mixed powder after re-mixing in step 3 into a mold for pressing...

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Abstract

The invention discloses a silver-based contact material with high fusion welding resistance. The silver-based contact material comprises, by weight percentage, 2%-15% of Ag powder, 2%-8% of Ni powderand 77%-96% of TiB2 powder; the sum of the weight percentages of the components is 100%. The invention also discloses a preparation method of a silver-based electrical contact material with fusion welding resistance, wherein the preparation method comprises the following steps: pre-mixing the Ni powder, the TiB2 powder and the Ag powder weighed in proportion for 4-8 h; then, continuing to mix thepowder in a three-dimensional motion power mixing machine for 2-6 h; and then compressing the mixed powder into a compressed blank and sintering to obtain an AgNi-TiB2 electrical contact material. TheAgNi-TiB2 electrical contact material prepared in the invention significantly solves a problem of poor fusion welding resistance of an AgNi contact material by introducing TiB2 particles into the AgNi contact material, and has the advantages of excellent electrical properties and low silver content.

Description

technical field [0001] The invention belongs to the technical field of low-voltage contact materials, and in particular relates to a silver-based contact material with high welding resistance, and also relates to a preparation method of the silver-based electrical contact material. Background technique [0002] Contacts are the core components of various high and low voltage switches, electrical appliances, instruments and components, and their performance directly affects the on-off capacity, service life and operational reliability of the entire electrical appliance. There are many kinds of electrical contact materials, among which AgNi contact material is a typical low-voltage contact material, which not only has good electrical conductivity, electrical wear resistance and low and stable contact resistance, but also has good plasticity and machinability performance. At present, AgNi contact materials are widely used in low-voltage electrical appliances such as AC and DC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05
CPCC22C1/05C22C5/06C22C32/0073
Inventor 王献辉朱婷习勇周子敬
Owner XIAN UNIV OF TECH
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