CN1279298A

CN1279298A - Cu-base powder alloy as electric contact material

Info

Publication number: CN1279298A
Application number: CN 99112292
Authority: CN
Inventors: 秦惠保; 崔洪涛
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-03
Filing date: 1999-07-03
Publication date: 2001-01-10

Abstract

A Cu-base powder alloy as electric contact material features that such elements are added to copper powder as diamond powder (0.6-2.0%), Cd (1.7-2.2%), La-Ce alloy (0.002-0.1%) and Al2O3 (0.06-2.0%) to improve non-fusibility and electrocorrosion resistance and reduce cost.

Description

Copper original washing powder foam alloy as electric contact material

The invention discloses a kind of polycomponent copper original washing powder foam alloy as electric contact material.

At present, use silver and silver-base alloy as electric contact material in the low voltage electrical apparatus industry mostly, though these materials can guarantee the use properties of its product, but consumed a large amount of precious metals silvers, the cost height, in recent years, in order to reduce the consumption of argent, people have carried out a large amount of research, a lot of electric contact materials have been developed with other material substitution silver and silver alloys, mainly based on copper base alloy, metallic copper is because the conductivity of copper is only second to silver as the body material of electrician's contact, but it is in air, the effect of water vapour and other corrosive gases is led to down or at electrical equipment, in the arcing process of outage stream, the zone of oxidation that produces has restricted its conductivity, making it resistance increases, temperature rise, and because metallic copper intensity is lower, anti-electrocorrosion and resistance fusion welding can be also relatively poor, for example: copper-cadmium-graphite, copper-diamond-cadmium, the use of these materials of alloy material such as copper-niobium has improved the working reliability of copper-base contact material greatly, but at resistance fusion welding, aspects such as anti-electrocorrosion are also undesirable, need further to improve, and cost also needs further to reduce.

Purpose of the present invention is intended to overcome the deficiency of above-mentioned prior art, proposes a kind ofly by the various ingredients alloy composition, and adds the modification medium, makes the copper base alloy electric contact material of material property complementary high-performance and low-cost.

For achieving the above object, the technical measures that the present invention adopts are: a kind of copper original washing powder foam alloy as electric contact material, its technical characterictic is: main ingredient and content are (weight percent): diamond powder: 0.6-2.0%, cadmium: 1.7-2.2%, lanthanum cerium alloy powder: 0.002-0.1%, aluminium sesquioxide: 0.06-2.0%, surplus is a copper powder.

Above-mentioned copper original washing powder foam alloy as electric contact material, the optimum content of lanthanum cerium alloy is 0.002-0.1%, the optimum content of aluminium sesquioxide is 0.06-0.5%.

In Cu alloy material, add bortz powder, can make its characteristics, be beneficial to intensity, the wear resistance that improves contact and guarantee the contact surface uniform wear with dispersion-strengthened; Add the lanthanum cerium alloy, can obviously improve the oxidative phenomena of contact surface, the lanthanum cerium belongs to rare earth metal, out-shell electron is active, during the local arcing of appliance material, contact surface produces the moment splash, under the state of weary oxygen, the trace gold emery is converted into carbon monoxide, produce reducing atmosphere, reduced the possibility of contact material surface oxidation, add the lanthanum cerium alloy because it is low many than lanthanum and cerium powder price, help reducing cost, the performance of contact material improves equally; Add aluminium oxide powder, not only can increase the intensity of copper-based material, improve its resistance fusion welding and anti-pitting attack performance, and make the physicals of its alloy and the variation that matter has all taken place electrical property, strengthened the intensity of copper base alloy, hardness and conductivity, aluminium sesquioxide alloy powder dispersity is good, the framework effect is arranged in matrix, its hardness increases rapidly after suitable thermal treatment, and is more much higher than the intensity that singly adds bortz powder, can reduce the consumption of diamond powder simultaneously, in addition, high rigidity, dystectic aluminium sesquioxide also has the effect of modification medium in copper alloy, can improve the conductivity of material, has also reduced the material cost of manufacture; Add an amount of cadmium alloy, can reduce the arcing temperature of contact, thereby reach the performance of anti-melting welding, inhibited oxidation.

Based on the combination of above-mentioned various ingredients alloy, make the performance of electric contact material of the present invention form complementation, be a kind of high-performance, electric contact material cheaply.

The production technique of copper original washing powder foam alloy as electric contact material of the present invention mainly is: component weighing → mixing stirring → compression moulding → sintering → shaping → technological processs such as thermal treatment.

The present invention compares with other copper base alloy electric contact material, have anti-oxidant, characteristics such as intensity is high, hardness is big, cost is low, resistance fusion welding and anti-electrocorrosion are good, can be widely used in the low-voltage apparatuses such as all kinds of AC/DC contactors, rly. and air switch, be the cheaper alternative of silver alloys electrical contact, have higher use value and favorable economic benefit.

The present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1: weighing 0.6 gram bortz powder, 1.7 restrains the copper cadmium alloy powder, and (cadmium content is 1.7,0.002 gram lanthanum cerium alloy powder, 0.06 gram aluminium sesquioxide, 97.6 gram copper powders down together),, in sealed vessel, mix, compression moulding again, sintering under the condition of anaerobic, shaping is then heat-treated at last, can obtain electric contact material of the present invention.

Embodiment 2: weighing 1.0 gram bortz powders, 2.0 gram copper are every alloy powder, 0.005 gram lanthanum cerium alloy powder, 0.25 gram aluminium sesquioxide, 96.7 gram copper powders, and other is with embodiment 1.

Embodiment 3: weighing 1.8 gram bortz powders, 2.0 gram copper cadmium alloy powder, 0.01 gram lanthanum cerium alloy powder, 0.5 gram aluminium sesquioxide, 95.7 gram copper powders, other is with embodiment 1.

Embodiment 4: weighing 2.0 gram bortz powders, 2.2 gram copper cadmium alloy powder, 0.1 gram lanthanum cerium alloy powder, 2.0 gram aluminium sesquioxides, 93.7 gram copper powders, other is with embodiment 1.

The copper original washing powder foam electric contact material that makes by above four embodiment, its performance has all reached corresponding national standards and industry standard, can satisfy the service requirements of electrician's contact, it is practicable fully being used for producing electrician's contact, have very high use value, also can create considerable economic simultaneously.

Claims

1, a kind of copper original washing powder foam alloy as electric contact material, the weight percent content that it is characterized in that main ingredient is: diamond powder: 0.6-2.0%, cadmium: 1.7-2.2%, lanthanum cerium alloy powder: 0.002-0.1%, aluminium sesquioxide: 0.06-2.0%, surplus is a copper powder.

2, according to the described copper original washing powder of claim 1 foam alloy as electric contact material, the content that it is characterized in that the lanthanum cerium alloy is 0.002-0.01%, and the content of aluminium sesquioxide is 0.06-0.5%.