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A kind of parallel fiber reinforced silver-graphite ribbon contact material and preparation method thereof

A technology of contact materials and parallel fibers, applied in the direction of welding/cutting media/materials, contacts, welding equipment, etc., can solve problems such as poor wettability, low bonding strength, and insignificant influence, achieve excellent plasticity, and improve processing Effects of performance, reliable bond strength

Active Publication Date: 2022-05-17
ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this processing method, the silver graphite and the solder layer are compounded by sintering, which is the same as the principle of silver graphite / silver strip composite solder in the scheme disclosed in patent ZL200910153565.2, and the solder layer is melted and bonded by heating. On the surface of silver graphite strip, but due to the poor wettability between solder and graphite, the strip prepared by ZL 201711177988.9, the bonding strength of the solder layer cannot be compared with the silver graphite / silver / solder strip with pure silver layer, The effect is not obvious in the material processing stage. When the silver graphite contact material is welded on the contact bridge, the bonding strength between the solder layer and the silver graphite layer is low, and there is a risk of contact falling off during use.

Method used

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  • A kind of parallel fiber reinforced silver-graphite ribbon contact material and preparation method thereof
  • A kind of parallel fiber reinforced silver-graphite ribbon contact material and preparation method thereof
  • A kind of parallel fiber reinforced silver-graphite ribbon contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a) 14.55kg silver powder and 0.45kg graphite powder are mixed uniformly in the powder mixing equipment;

[0037] b) Melt 22.5kg of silver and 27.5kg of oxygen-free copper in a graphite crucible of an intermediate frequency melting furnace to form a silver-copper alloy melt, and use high-pressure water atomization equipment to prepare silver-copper alloy powder, which is dried and screened to form a weld layer powder;

[0038] c) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. The center line of the rubber sleeve coincides with the center line of the metal partition. Put the silver graphite powder into the space of the metal partition, and the silver-copper alloy powder. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with silver graphite in the center and s...

Embodiment 2

[0044] a) 14.25kg silver powder and 0.75kg graphite powder are mixed uniformly in the powder mixing equipment;

[0045] b) Melt 30kg of silver and 20kg of oxygen-free copper in a graphite crucible of an intermediate frequency melting furnace to form a silver-copper alloy melt, and use high-pressure water atomization equipment to prepare silver-copper alloy powder, which is dried and sieved to form a welding layer powder ;

[0046] c) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. The center line of the rubber sleeve coincides with the center line of the metal partition. Put the silver graphite powder into the space of the metal partition, and the silver-copper alloy powder. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with silver graphite in the center and sil...

Embodiment 3

[0052] a) 14.4kg silver powder and 0.6kg graphite powder are mixed uniformly in the powder mixing equipment;

[0053] b) Melt 25kg of silver and 25kg of oxygen-free copper in the graphite crucible of the intermediate frequency melting furnace to form a silver-copper alloy melt, and use high-pressure water atomization equipment to prepare silver-copper alloy powder, which is dried and screened to form welding layer powder ;

[0054] c) Prepare the rubber sleeve and the metal partition. The cylindrical metal partition is placed inside the rubber sleeve. The center line of the rubber sleeve coincides with the center line of the metal partition. Put the silver graphite powder into the space of the metal partition, and the silver-copper alloy powder. into the space between the rubber sleeve and the metal partition, pull out the metal partition, and use cold isostatic pressing equipment to press the ingot to obtain a cylindrical coated ingot with silver graphite in the center and si...

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Abstract

The invention discloses a parallel fiber reinforced silver-graphite strip contact material and a preparation method thereof. The material is composed of a working layer and a welding layer, wherein the welding layer material is a silver-copper alloy, and the silver-graphite powder and the silver-copper alloy are mixed together. The powder is pressed into a composite ingot with a silver-copper alloy layer wrapped with a silver-graphite layer, and then processed into a silver-graphite / silver-copper alloy composite strip through sintering, recompression, and reverse extrusion. , surface treatment and other processes to prepare silver-graphite ribbon contact products, which are mainly used in the field of miniature circuit breakers using automatic welding. Compared with the traditional silver-graphite ribbon contact material, the ribbon contact material prepared by the invention meets the requirements of automatic welding, and solves the risks of welding blistering and poor bonding strength in the prior art. The contact material has excellent processing performance, high material utilization rate, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of electrical contacts, and specifically refers to a preparation method of a silver-graphite contact material, in particular to a parallel fiber-reinforced silver-graphite ribbon contact material and a preparation method thereof. Background technique [0002] Silver graphite contact material is widely used in the fields of molded case circuit breakers, frame circuit breakers and miniature circuit breakers because of its good anti-welding performance and low and stable contact resistance. In recent years, electrical manufacturers have higher and higher requirements for the reliability and consistency of electrical components. Contact materials are supplied with strips or profiles to meet the requirements of high-end automatic welding, which has become a development trend in the electrical contact industry. In the field of miniature circuit breakers, commonly used silver-based electrical contact material strip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/04B22F3/10B22F7/06B22F3/16B22F3/20C22C5/06C22C9/00B23K35/30H01H11/04H01H1/0233
CPCB22F3/04B22F3/1007B22F7/06B22F3/164B22F3/20C22C5/06C22C9/00B23K35/3006B23K35/302H01H11/048H01H1/0233B22F2003/166B22F2003/208B22F2998/10
Inventor 万岱林应涛黄钟张海金妹张秀芳何斌缪仁梁郑泽成陈松扬
Owner ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD
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