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A kind of AGME contact material for circuit breaker and preparation method thereof

A technology for contact materials and circuit breakers, which is applied to circuits, contacts, metal processing equipment, etc., can solve the problems of cumbersome preparation process, complex process, and high requirements for production environment equipment, so as to improve the density of the green body and reduce the internal pressure of the barrel. Effect of temperature, good arc resistance

Active Publication Date: 2020-12-01
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned process has cumbersome preparation process and complicated process, and has high requirements on the production environment and equipment involved in the preparation process.

Method used

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  • A kind of AGME contact material for circuit breaker and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides a method for preparing an AgMe contact material for a circuit breaker, comprising the following steps:

[0038] In the first step, first put 65wt% of W powder, 1wt% of Ni powder, and 34wt% of silver powder in a powder mixer for premixing at a speed of 40 rpm for 1 hour and pass through a 100-mesh sieve.

[0039] In the second step, the mixed powder obtained in the first step is ball milled, the ball milling speed is 60 rpm and 150 rpm, the alternating time is 0.5h, and the ball milling time is 5 hours, adding balls and deionized water, The ball-to-water ratio (that is, the weight ratio of grinding balls, powder, and deionized water) is 2:1:0.25.

[0040]In the third step, the powder after wet ball milling is wet-mixed and granulated, and PVA glue is added. The glue-mixing temperature is 90°C, the amount of glue added is 10% of the weight of the powder, and the drying temperature is 100°C.

[0041] In the fourth step, the rubber-mixed and granul...

Embodiment 2

[0047] This embodiment provides a method for preparing an AgMe contact material for a circuit breaker, comprising the following steps:

[0048] In the first step, first put 50wt% of WC powder, 1.5% of Fe powder, 1wt% of Co powder, 0.5% of Cu powder, and 48wt% of silver powder in a powder mixer for pre-mixing at a speed of 30 rpm for 4 hours , through a 200-mesh sieve.

[0049] In the second step, the mixed powder obtained in the first step is subjected to ball milling, the ball milling speed is 100 rpm and 250 rpm, the alternating time is 1 h, and the ball milling time is 8 hours, adding grinding balls and absolute ethanol, ball milling The ratio of material to ethanol (that is, the weight ratio of grinding balls, powder, and absolute ethanol) is 1:1:0.1.

[0050] In the third step, the powder after wet ball milling is wet-mixed and granulated, and PVP glue is added. The glue-mixing temperature is 75°C, the amount of glue added is 15% of the weight of the powder, and the dryi...

Embodiment 3

[0057] This embodiment provides a method for preparing an AgMe contact material for a circuit breaker, comprising the following steps:

[0058] In the first step, at first 68.5wt% of W powder, 1.0wt% of Ni powder, 0.5wt% of Cu powder, and 30wt% of silver powder are placed in a powder mixer for premixing, and the rotating speed is 20 rpm for 6 hours. 400 mesh sieve.

[0059] In the second step, the mixed powder obtained in the first step is ball milled, the ball milling speed is 300 rpm and 60 rpm, the alternating time is 0.5h, the ball milling time is 24 hours, adding grinding balls and acetone, the ball material The acetone ratio (that is, the weight ratio of grinding balls, powder, and acetone) is 3:1:0.6.

[0060] In the third step, the powder after wet ball milling is wet-mixed and granulated, and PEG glue is added. The glue-mixing temperature is 100°C, the amount of glue added is 20% of the weight of the powder, and the drying temperature is 110°C.

[0061] In the fourt...

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Abstract

The invention discloses an AgMe contact material for a circuit breaker and a preparation method thereof, comprising: firstly, premixing Ag powder, Me powder and additive powder to obtain AgMe mixed powder; secondly, obtaining The AgMe mixed powder is subjected to high-speed and low-speed alternating wet ball milling; the third step is to wet the powder after wet ball milling to granulation by wet mixing and drying; the fourth step is to shape the granulated powder Pressing to obtain the AgMe green body; the fifth step, degumming and sintering the AgMe green body to obtain the AgMe porous skeleton; the sixth step, sintering the degummed and sintered AgMe porous skeleton and Ag through infiltration and sintering to obtain the AgMe electrical contact material. The hardness of the material of the invention is obviously higher than that of the AgMe electrical contact material prepared by the traditional method, the breaking ability and electrical life of the contact material are improved, the operation is simple, the yield is high, and the material is suitable for large-scale production.

Description

technical field [0001] The present invention relates to an electrical contact material and a preparation method thereof in the field of material technology, in particular to a preparation method of an AgMe (Me is tungsten W or tungsten carbide WC) contact used for a low-voltage circuit breaker and AgMe contact material prepared by this method. Background technique [0002] AgMe-based electrical contact materials are a new generation of contact materials, in which Me is tungsten W or tungsten carbide WC, which mainly utilizes the good electrical and thermal conductivity of Ag and the high melting point and high hardness of Me, which can withstand strong arc corrosion , has good welding resistance and corrosion resistance, has successfully replaced AgCdO and AgNi alloys, and is currently widely used in various low-voltage electrical appliances such as miniature circuit breakers and molded case circuit breakers. [0003] At present, AgMe is mainly used as the moving contact ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/023H01H11/04C22C5/06C22C27/04C22C30/00C22C30/02C22C29/08C22C32/00C22C1/04C22C1/05
CPCH01H1/023H01H11/04H01H11/048C22C5/06C22C27/04C22C30/00C22C30/02C22C29/08C22C32/0052C22C1/0466C22C1/05C22C1/051B22F2998/10B22F1/10B22F3/1035B22F3/1121B22F3/02B22F2009/043
Inventor 费玲娟吕鹏举王晓平祁更新吴新合陈家帆
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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