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Silver based electrical contact material resistant to arc erosion and preparation method thereof

An electric contact material and arc-resistant technology, applied in contacts, circuits, electric switches, etc., can solve problems such as poor arc corrosion resistance, and achieve stable performance, good electrical and thermal conductivity, and good electrical and thermal conductivity. Effect

Active Publication Date: 2018-09-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a silver-based electrical contact material resistant to arc erosion, which solves the problem of poor arc erosion resistance of existing electrical contact materials

Method used

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  • Silver based electrical contact material resistant to arc erosion and preparation method thereof
  • Silver based electrical contact material resistant to arc erosion and preparation method thereof
  • Silver based electrical contact material resistant to arc erosion and preparation method thereof

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preparation example Construction

[0025] A kind of preparation method of the silver-based electric contact material of resistance to electric arc corrosion The specific process is as follows figure 1 As shown, the specific operation steps are as follows:

[0026] Step 1, weigh the following materials according to the mass percentage: 5%-20% of Cu powder with a purity of not less than 99.9%, TiB with a purity of not less than 99.9% 2 2%-10% Ag powder and 70%-93% Ag powder with a purity of not less than 99.9%, the sum of the mass percentages of the above components is 100%;

[0027] Step 2, the weighed Ag powder, Cu powder and TiB 2 Put the powder into a ball mill, and add control agent absolute ethanol and dispersant polyvinylpyrrolidone to pre-mix the powder. The amount of absolute ethanol added is Ag powder, Cu powder and TiB powder 2 0.5-1.2% of the total mass of the powder, the amount of polyvinylpyrrolidone added is Ag powder, Cu powder and TiB 2 0.5-2.0% of the total mass of the powder, the speed of th...

Embodiment 1

[0033] Step 1, weigh the following materials according to the mass percentage: Cu powder with a purity of not less than 99.9% 5%, and a purity of not less than 99.9% TiB 2 Ag powder 2% and purity not less than 99.9% Ag powder 93%, the sum of the mass percentages of the above components is 100%;

[0034] Step 2, the weighed Ag powder, Cu powder and TiB 2 Put the powder into a ball mill, and add control agent absolute ethanol and dispersant polyvinylpyrrolidone to pre-mix the powder. The amount of absolute ethanol added is Ag powder, Cu powder and TiB powder 2 0.5% of the total mass of powder, the amount of polyvinylpyrrolidone added is Ag powder, Cu powder and TiB 2 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 4h to obtain the ...

Embodiment 2

[0039] Step 1, weigh the following materials according to the mass percentage: 20% of Cu powder with a purity of not less than 99.9%, TiB with a purity of not less than 99.9% 2 Ag powder 3% and purity not less than 99.9% Ag powder 77%, the sum of the mass percentages of the above components is 100%;

[0040] Step 2, the weighed Ag powder, Cu powder and TiB 2 Put the powder into a ball mill, and add control agent absolute ethanol and dispersant polyvinylpyrrolidone to pre-mix the powder. The amount of absolute ethanol added is Ag powder, Cu powder and TiB powder 2 1.2% of the total mass of the powder, the amount of polyvinylpyrrolidone added is Ag powder, Cu powder and TiB 22.0% 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 premixed powder into a three-dimensional powder mixer for re-mixing, the vibration frequency is 40 Hz, and the mixing time is 8 hours to ...

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Abstract

The invention discloses a silver based electrical contact material resistant to arc erosion. The material comprises following components in percentage by weight: 5 to 20% of Cu, 2 to 10% of TiB2, and70 to 93% of Ag, wherein the total percentage by weight is 100%. The invention also discloses a preparation method of the electrical contact material. The preparation method comprises following steps:weighing Ag powder, Cu powder and TiB2 powder according to a ratio, mixing the powder in advanced to obtain premixed powder; placing the premixed powder in a three dimensional powder mixing machine,mixing the premixed powder again to obtain mixed powder; filling obtained powder into a mould, pressing the powder to obtain a pressed blank; placing the pressed blank in a sintering furnace, carryingout sintering, and finally naturally cooling the blank in the furnace to the room temperature to obtain the AgCu-TiB2 electrical contact material. Through the aforementioned method, TiB2 is introduced into an Ag-Cu alloy electrical contact material, and the low cost AgCu-TiB2 electrical contact material is prepared by a powder metallurgic method and has the advantages of good thermal conductivityand electrical conductivity, excellent performance on resisting arc erosion and material transfer, and good mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of low-voltage contact materials, and in particular relates to an arc-resistant silver-based electrical contact material, and also relates to a preparation method of the silver-based electrical contact material. Background technique [0002] The electrical contact is the component in the switchgear that is responsible for making and breaking the circuit, and plays a decisive role in the safe operation of the switchgear. Because of its good comprehensive performance, silver-based contacts are widely used in low-voltage electrical appliances such as relays, contactors and circuit breakers. With the development of low-voltage electrical appliances in the direction of high power, miniaturization, and long life, higher performance requirements are put forward for electrical contact materials, that is, they should have excellent electrical and thermal conductivity, arc erosion resistance, and welding resistance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/08C22C32/00C22C1/05H01H1/023
CPCC22C1/05C22C5/08C22C32/0073H01H1/023
Inventor 王献辉周子敬朱婷习勇
Owner XIAN UNIV OF TECH
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