Manufacturing process and products of silver tin oxide calcium oxide electrical contacts

A silver tin oxide, manufacturing process technology, applied in the direction of circuits, electric switches, electrical components, etc., can solve the problems of not reaching the expected effect and service life, high surface contact resistance, contact base pollution, etc., to achieve good arc extinguishing performance, low surface contact resistance, and solve the effect of reciprocating turnover

Inactive Publication Date: 2016-05-11
周朝贵 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many production links, long production cycle, low production efficiency, high production cost, and low material utilization rate (only 38-54%)
The reciprocating turnover of materials brings more impurity components to the contact base, pollutes the contact base, and seriously affects its performance
Unable to achieve the expected effect and service life
However, the silver tin oxide contacts used in the current low-voltage electrical equipment generally have the disadvantages of high temperature and large surface contact resistance, and the safety is threatened by fusible welding.

Method used

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  • Manufacturing process and products of silver tin oxide calcium oxide electrical contacts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. According to the mass ratio of components: tin: 5%; calcium: 1.5%; cerium: 0.03%; the balance is silver. The ingots are melted to form silver-tin-calcium alloy ingots.

[0032] 2. The silver-tin-calcium alloy ingot is heated and extruded into a wire, and then drawn to a wire with a diameter of φ1.5mm.

[0033] 3. On the cold heading machine, the wire material of 2 and the silver wire are cut into small sections with suitable lengths by the cold heading machine and made into a sheet contact product of φ3㎜×0.8㎜.

[0034] 4. Pour the contact product of 3 into an argon electric furnace in a vacuum state of 480°C for diffusion annealing for 60 minutes, and then cool down to 80°C with the furnace to take out the product.

[0035] 5. Put the product of 4 into an electric furnace with an oxygen flow pressure of 1.2Mpa, firstly oxidize it at 620°C for 6 hours, and then heat it up to 700°C for 6 hours with the furnace. The finished electric contact is obtained after being co...

Embodiment 2

[0037] 1. According to the mass ratio of components: tin: 7%; calcium: 3%; cerium: 0.05%; the balance is silver. The ingots are melted to form silver-tin-calcium alloy ingots.

[0038] 2. The silver-tin-calcium alloy ingot is heated and extruded into a wire, and then drawn to a wire with a diameter of φ2.5mm.

[0039] 3. On the cold heading machine, the wire material of 2 and the silver wire are cut into small sections with suitable lengths by the cold heading machine and made into a sheet contact product of φ5㎜×1.3㎜.

[0040] 4. Pour the contact product of 3 into an argon electric furnace for 90 minutes in a vacuum state of 500°C for diffusion annealing, and then cool down to 80°C with the furnace to take out the product.

[0041] 5. Put the product of 4 into an electric furnace with an oxygen flow pressure of 1.2Mpa at the first temperature of 630°C for oxidation treatment for 18 hours, and then heat up to 710°C for 16 hours of oxidation treatment with the furnace. The fin...

Embodiment 3

[0043] 1. According to the mass ratio of components: tin: 8%; calcium: 4%; yttrium: 0.02%; the balance is silver. The ingots are melted to form silver-tin-calcium alloy ingots.

[0044] 2. The silver-tin-calcium alloy ingot is heated and extruded into a wire, and then drawn to a wire with a diameter of φ3mm.

[0045] 3. On the cold heading machine, the wire material of 2 and the silver wire are cut into small sections with suitable lengths by the cold heading machine and made into a sheet contact product of φ6㎜×1.5㎜.

[0046] 4. Pour the contact product of 3 into an argon electric furnace for 90 minutes in a vacuum state of 520°C for diffusion annealing, and then cool down to 80°C with the furnace to take out the product.

[0047] 5. Put the product of 4 into an electric furnace with an oxygen pressure of 1.2Mpa, and firstly oxidize it at 630°C for 22 hours, and then heat it up to 720°C for 20 hours with the furnace. The finished electric contact is obtained after being cool...

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Abstract

The present invention disclosed a manufacturing process and its products for silver oxide calcium oxide. The manufacturing process is: melting, ingots, thermal squeezing, pulling into alloy silk materials, and the specifications required for the formation of cold 镦 镦 required.The sheets and discharge of electrical contact products are obtained by oxidation treatment.The electrical contact products produced by the preparation method of the present invention are characterized by low surface contact resistance, good electrical properties, arc extinguishing performance, strong anti -welding performance, and excellent comprehensive performance.Simple processing methods, high material utilization, less harmful impurities, low production cost, and short production cycle.Economic benefits and social benefits are particularly significant.

Description

technical field [0001] The invention belongs to the technical field of electric contact manufacturing, and specifically refers to a manufacturing process and a product of a silver tin oxide calcium oxide electric contact. Background technique [0002] In low-voltage electrical equipment, the electrical contacts, which are the core components of electrical appliances, carry the heavy task of connecting and breaking currents. It is an important guarantee to ensure the safe operation of equipment and the safety of people's lives and property. [0003] At present, the production process of electrical contacts is nothing more than two major types of production: powder metallurgy and alloy internal oxidation. Most of the contact manufacturers continue to use the alloy internal oxidation method to produce electrical contact products. The production link of the method is realized by processes such as smelting, ingot casting, surface treatment, hot-rolled welding cladding, cold-rol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H11/04C22C5/06
Inventor 张树堂郑晓杰唐艳华
Owner 周朝贵
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