Silver copper oxide/copper composite electrical contact material and preparation process thereof

An electric contact material, silver copper oxide technology, applied in the direction of contacts, circuits, electric switches, etc., can solve the problems of high silver content in the contact material and high production cost, and achieve the improvement and reduction of physical and electrical properties Material cost, effect of grain refinement

Active Publication Date: 2011-05-11
WENZHOU LONGSUN ELECTRICAL ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some enterprises at home and abroad use the "internal oxidation method" to develop and produce silver-copper oxide contact materials. The silver-copper oxide contacts produced by this method are all silver-based contacts. The disadvantages of these processes are: the overall contact material High silver content, high production cost

Method used

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  • Silver copper oxide/copper composite electrical contact material and preparation process thereof
  • Silver copper oxide/copper composite electrical contact material and preparation process thereof
  • Silver copper oxide/copper composite electrical contact material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The silver oxide copper working layer of this embodiment is as follows through the mechanical industry electrical material product quality supervision and inspection center performance index detection: density: 9.86g / cm3,

[0033] Hardness (HB): 82.3,

[0034] Resistivity: 2.29μΩcm,

[0035] Metallographic structure: The distribution of particles in the silver matrix is ​​mainly uniform, without aggregates, inclusions, and pores, the composite working layer is evenly distributed, and there is no leakage of copper matrix materials around the surface.

[0036] Embodiment two:

Embodiment 2

[0038] Adopt the silver copper oxide / copper composite electrical contact that the present invention makes, its silver copper oxide working layer performance index is as follows:

[0039] 1. Density ≥ 9.6g / cm3;

[0040] 2. Hardness (HB) ≥ 70;

[0041] 3. Resistivity ≤ 3.3μΩcm;

[0042] 4. Metallographic structure: uniform particles;

[0043] 5. Bonding strength: There is no gap between the silver copper oxide working layer and the substrate copper bonding surface.

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Abstract

The invention discloses a silver copper oxide/copper composite electrical contact material and a preparation process thereof. The process comprises the following steps: mixing silver and copper according to certain proportions, and then, smelting the mixture in an intermediate frequency furnace; then, carrying out alloy atomization by using high pressure water atomizing equipment; baking after atomization to obtain powder; screening; putting the screened powder into an internal oxidization furnace for oxidizing at certain temperature and oxygen pressure; carrying out isostatic cool pressing after oxidization to form a billet; sintering and extruding to form a plate; and then, carrying out composite rolling with copper to obtain a finished product. Because the formula and process disclosed by the invention are reasonable, the produced electrical contact has the characteristics of high conductivity, uniform and fine tissue, high bonding strength between a working layer and a welding layer, fusion welding resistance, electrical arc erosion resistance and the like.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and specifically refers to a silver-copper oxide / copper composite electrical contact material and a preparation process thereof. Background technique [0002] Electric contacts are key components of electrical switches such as relays and contactors, and their performance directly affects the reliability and service life of electrical switches. For a long time, silver cadmium oxide / silver contact materials have been widely used in the electrical industry at home and abroad, but silver cadmium oxide materials have certain toxicity. With the improvement of people's living standards, people's requirements for the comprehensive performance of electrical appliances are getting higher and higher. Silver copper oxide material is another new environmental protection contact material that can replace silver cadmium oxide material, and silver copper oxide is used / Copper composite contact mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/0237C22C5/06C22C1/04B21B3/00
Inventor 郑元龙黄文锋李青敏冯如信
Owner WENZHOU LONGSUN ELECTRICAL ALLOY CO LTD
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