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Silver-tin oxide electrical contact material and preparation method thereof

A technology of oxide electrical and contact materials, which is applied in the direction of contact materials, can solve problems such as temperature rise, affecting alloy contact resistance and welding resistance, and material processing difficulties, so as to reduce the internal oxidation temperature and promote internal oxidation. Oxidation process, the effect of overcoming poor processability

Inactive Publication Date: 2005-06-08
KUNMING INST OF PRECIOUS METALS
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AI Technical Summary

Problems solved by technology

[0005] The invention can solve the problem that the temperature rise of the silver tin oxide alloy is higher than that of the silver cadmium oxide, which seriously affects the contact resistance and anti-welding performance of the alloy and the problem that the AgSnO 2 Difficult material processing problems

Method used

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Examples

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Embodiment Construction

[0018] Examples 1 to 4 are the formula ratios of the alloy materials of No. 1 to No. 4 samples in Table 3, which are prepared according to the following steps.

[0019] (1) Ag, Sn, and mixed rare earth elements with a purity of 99.99% are prepared according to the ratio of alloy design components, alloyed in a vacuum intermediate frequency melting furnace, and rapidly solidified and poured.

[0020] (2) Extruding the AgSnRE alloy ingot into plates and wires, the extrusion ratio is >30:1, and the extrusion temperature is 500°C-800°C.

[0021] (3) The extruded material is processed by rolling, drawing, heat treatment and other processes to prepare products such as wire, plate, profile or rivet; the rolling and drawing deformation is 30% to 70%, and the heat treatment temperature is 500℃~800℃.

[0022] (4) According to the requirements of use, the internal oxidation of materials such as wire, plate, profiled material or rivets is carried out. The internal oxidation temperature i...

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Abstract

The invention discloses silver tin oxide electrician contact material and its preparation method. Its chemical composition (weight ratio) is that the SnO2 is from three percent to ten percent; the mixed rare earth oxide (Sm2O3, Gd2O3, Y2O3) is from 0.1 percent to 2.0 percent; the surplus quantity is Ag. The preparation method is that the Ag, Sn, rare earth element are made up according to the alloy design proportion of ingredients, alloying in the vacuum melting furnace; then the AgSnRE is made after quickly solidification. At first the alloy is formed to thread, panel, profiled bar or rivet by extrusion, rolling, drawing, heat treatment. Then it is formed to AgSnO2 mixed rare earth oxide electrician contact material by produce internal operation. It can be used in AC and DC contactor, relay, controller, circuit breaker, switch, and so on.

Description

technical field [0001] The invention relates to a silver-based alloy and a preparation method thereof, in particular to a silver-tin oxide electrical contact material and a preparation method thereof. Background technique [0002] Silver oxide series electrical contact materials mainly include AgCdO, AgSnO 2 , AgZnO, etc. AgCdO electrical contact material (containing CdO: 8% to 15%) has long been known as "the best electrical contact material" due to its excellent arc corrosion resistance, welding resistance and low contact resistance. However, due to the existence of cadmium element and its compounds, the production, use, and recycling of AgCdO materials are faced with the pollution problem of "cadmium poisoning". This is because (1) CdO will accumulate in organisms, such as in kidneys, bones and blood, making it more toxic; (2) for humans, cadmium and its compounds are the second type of toxic chemicals, especially It can easily lead to liver cancer and lung cancer. (3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/04
Inventor 谢明曹曙光陈力李汝明段云喜曾荣川李方中符世继杨有才张健康黎玉盛刘莉
Owner KUNMING INST OF PRECIOUS METALS
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