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Manufacturing process for silver tin oxide calcium oxide electrical contact and electrical contact product

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 short production cycle

Inactive Publication Date: 2014-12-10
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 for silver tin oxide calcium oxide electrical contact and electrical contact product

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 1.2 Mpa, firstly oxidize at 620°C for 6 hours, and then heat up to 700°C for 6 hours with the furnace. The finished electric contact is obtained after being cooled ...

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 1.2 Mpa, firstly oxidize at 630°C for 18 hours, and then heat up to 710°C for 16 hours with the furnace. The finished electric contact is obtained after being cooled ...

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 flow pressure of 1.2 Mpa, firstly oxidize at 630°C for 22 hours, and then heat up to 720°C for 20 hours with the furnace. The finished electric contact is obtained after being cooled t...

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Abstract

The invention discloses a manufacturing process for a silver tin oxide calcium oxide electrical contact and an electrical contact product. In the manufacturing process, the electrical contact product is manufactured through smelting, ingot casting, hot extrusion, drawing into ally wires, forming of required specification of sheet through cold heading, then diffusion annealing and oxidation treatment. The electrical contact product produced by adopting the preparation method is characterized in that the electrical contact product is low in surface contact resistance, good in electrical property and arc extinguishing performance, high in welding resistance and good in combination property. The processing method is simple, the material utilization rate is high, the detrimental impurity is few, the production cost is low, and the production cycle is low. The economic benefit and social benefit are particularly obvious.

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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IPC IPC(8): H01H11/04C22C5/06
Inventor 张树堂郑晓杰唐艳华
Owner 周朝贵
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