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A layered silver-copper brazing three-composite electrical contact material prepared by atomization method

A technology of electric contact material and atomization method, which is applied in the field of alloy materials, can solve the problems of high cost of electric contact materials, decline of economic benefits of enterprises, and failure to meet the development trend, etc., and achieve excellent welding resistance and durability Arc burning resistance, improved service life, and obvious effects of saving silver

Active Publication Date: 2019-12-20
WENZHOU LONGSUN ELECTRICAL ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, today's silver resources are very limited. With the increase of the amount, the price of silver will rise soaring, so that the cost of producing electrical contact materials will remain high, the economic benefits of enterprises will decline, and the social benefits will also be greatly reduced.
Moreover, another metal element of this type of product, cadmium, is more polluting to the environment, which does not conform to the current development trend of environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Step 1. Atomized powder production: including preparing silver metal alloy powder and copper metal alloy powder.

[0059]When preparing silver metal alloy powder or copper metal alloy powder, adding aluminum, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, indium, tin, antimony, tellurium, bismuth to silver or copper One or two or more metals, or one or two or more rare earth alloys of scandium, yttrium, lanthanum, cerium, neodymium, ytterbium, and lutetium, are smelted at high temperature at a temperature of 1030-1450°C, and are fully After alloying, use high-pressure water to atomize it into silver metal alloy powder or copper metal alloy powder, then dry and pass through a 50-500 mesh sieve.

[0060] Step 1-1 Preparation of silver metal alloy powder

[0061] When preparing silver metal alloy powder, silver and added metal elements and rare earth elements are smelted at a high temperature at a temperature of 1030-1400°C. After ...

Embodiment 2

[0073] The difference with Embodiment 1 is:

[0074] Step 3: Add graphite, nickel, silicon carbide, yttrium, lanthanum oxide and diamond micropowder to the silver metal alloy powder obtained in the previous step 2, according to silver metal alloy 90%, nickel 5.7%, diamond 1.2%, lanthanum oxide 1.5% %, yttrium 0.5%, alumina 0.2%, zirconia 0.1%, bismuth oxide 0.8%, uniformly mixed in the powder mixing ball mill, the mixing time is 8 hours, and the ball-to-material ratio is 20:1.

[0075] Step 6. According to the above-mentioned steps 2, 3, 4, and 5 steps are the same, prepare the copper alloy layer strip, the final content is: copper: 89%, nickel 3.7%, diamond 1.5%, lanthanum oxide 1.5%, yttrium 0.5%, Scandium oxide 0.5%, zinc oxide 1%, aluminum oxide 0.1%, zirconium oxide 0.3%, bismuth oxide 1%, lanthanum yttrium cerium alloy 0.9%.

Embodiment 3

[0077] The difference with Embodiment 1 is:

[0078] Step 3: Add graphite, nickel, silicon carbide, yttrium, lanthanum oxide, and diamond micropowder to the silver metal alloy powder obtained in the previous step 2, by silver metal alloy 96%, nickel 0.5%, diamond 1.5%, lanthanum oxide 2%, uniformly mixed in a powder mixing ball mill, the mixing time is 8 hours, and the ball-to-material ratio is 20:1.

[0079] Step 6. According to the above-mentioned steps 2, 3, 4, and 5, the copper alloy layer strip is prepared, and the final content is: copper: 90%, nickel 3%, vanadium 1%, manganese 0.5%, zinc oxide 1%, Titanium dioxide 1%, diamond 0.5%, lanthanum oxide 1.5%, lanthanum yttrium cerium alloy 0.9%, scandium 0.1%, other 1%.

[0080] The main properties of the three-layer composite material containing additives prepared by the present invention are as follows:

[0081] 1. Density: ≥8.3g / cm3;

[0082] 2. Hardness (HB) ≥ 70;

[0083] 3. Resistivity: ≤2.15μΩ.cm;

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Abstract

The invention discloses a layered silver-copper-brazing three-laminated electric contact material and a preparation method thereof. According to the method, silver alloy powders, copper alloy powders and solders are prepared firstly. After that, strip materials are prepared by utilizing the silver alloy powders, the copper alloy powders and the solders. Finally, the strip materials are compounded to obtain the three-laminated electric contact material. The obtained electric contact material is low in material cost, excellent in comprehensive electrical performance, energy-saving, and environment-friendly, which can be used for replacing the materials of traditional copper alloy contacts, silver alloy contacts and silver-copper alloy contacts.

Description

technical field [0001] The invention relates to an alloy material, in particular to a method for preparing a layered silver-copper-brazing triple-composite electrical contact material prepared by an atomization method. Background technique [0002] The core components of relays, contactors, and circuit breakers are electrical contacts (points), which undertake the heavy task of connecting and breaking currents. The quality of contact elements depends on the performance of electrical contact (points) materials and scientific and effective Combination, it is an important guarantee for electrical safety. [0003] At present, the most widely used contact materials on the market are silver alloy and copper alloy. Copper alloy contact materials are partly used in circuit breakers and high-voltage switches. Although copper alloy contact materials are cheap, copper alloy electrical contacts have poor oxidation resistance. The time from installation to commercial use varies, and ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/021H01H11/04B22F7/04
CPCB22F7/04H01H1/021H01H11/048
Inventor 蒋源冯如信郑元龙何高明
Owner WENZHOU LONGSUN ELECTRICAL ALLOY CO LTD
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