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Electrical contact based on powdered copper and manufacturing process thereof

A manufacturing process and technology of electrical contacts, applied in the field of metallurgy, can solve the problems of expensive precious metal silver, difficulty in large-scale use, and limited resources, and achieve the effects of low price, small arc, and good electrical properties

Inactive Publication Date: 2013-04-03
温州银泰合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price and limited resources of precious metal silver, it is difficult to use it on a large scale in low-voltage electrical appliances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh raw materials by weight percentage: nickel 0.3%, boron 0.15%, tungsten 0.1%, graphite 0.25%, titanium 2%, molybdenum 0.15%, diamond 0.2%, lanthanum 0.3%, aluminum 0.5%, niobium 0.5%, silicon 0.15% , 0.1% yttrium, 0.13% chromium, 0.2% cerium, and the balance is copper powder. First mix the best value with copper powder, and use a high-energy mixing roller machine for 2 hours to mix and roll, then put the mixed alloy powder, 4kg powder into the mold, press it into a round lake with a 350T hydraulic press, and then put it into a vacuum Sinter in a high-temperature furnace at 850°C for 1 hour to cool down, then use a 350T hydraulic press to squeeze and shape it, and then put it into a vacuum high-temperature furnace for sintering and heat preservation for 1 hour. After being out of the furnace, a 650T extrusion machine is used to press it into a plate shape, and then annealed and rolled into the required specifications, and then it is formed into a contact shape with ...

Embodiment 2

[0029] Weigh raw materials by weight percentage: nickel 0.3%, boron 0.1%, tungsten 0.1%, graphite 0.2%, titanium 1%, manganese 0.1%, diamond 0.1%, lanthanum 0.2%, aluminum 0.5%, niobium 0.5%, silicon 0.1% , 0.1% of yttrium, 0.1% of chromium, and 96.4% of copper were mixed in a high-energy mixing drum machine, and the mixing time was 2 hours. Then enter the model and press it with a 350-ton hydraulic press, then put it into a vacuum high-temperature furnace for sintering at 850°C for 1 hour and then cool it down. The steel is annealed and rolled to the required specifications, and then formed into a contact shape by a punching machine to make a powdered copper-based electrical contact.

[0030] The properties of the powdered copper-based electrical contacts are as follows:

[0031] Density 8.3g / cm

[0032] Resistivity 2.4GΩcm

[0033] Hardness 40~60(Hv)

Embodiment 3

[0035] Weigh raw materials by weight percentage: nickel 6%, boron 4%, tungsten 7%, carbon 8%, titanium 7%, manganese 6%, tungsten oxide 8%, lanthanum 7%, aluminum 7%, niobium 6%, silicon 5% %, yttrium 6%, cadmium 6%, copper 27%, mixed in a high-energy mixing drum machine, and the mixing time was 2 hours. Then enter the model and press it with a 350-ton hydraulic press, then put it into a vacuum high-temperature furnace for sintering at 850°C for 1 hour and then cool it down. The steel is annealed and rolled to the required specifications, and then formed into a contact shape by a punching machine to make a powdered copper-based electrical contact.

[0036] The properties of the powdered copper-based electrical contacts are as follows:

[0037] Density 8.3g / cm

[0038] Resistivity 2.4GΩcm

[0039] Hardness 40~60(Hv)

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Abstract

The invention provides an electrical contact based on powdered copper and a preparation process thereof. The electrical contact based on the powdered copper is prepared from the following materials in percentage by weight: 0.3 to 7 percent of nickel, 0.1 to 6 percent of boron, 0.1 to 8 percent of tungsten, 0.2 to 10 percent of graphite, 1 to 7 percent of titanium, 0.1 to 6 percent of molybdenum, 0.1 to 8 percent of diamond, 0.2 to 7 percent of lanthanum, 0.5 to 9 percent of aluminum, 0.5 to 8 percent of niobium, 0.1 to 5 percent of silicon, 0.1 to 6 percent of yttrium, 0.1 to 6 percent of chromium, 0.1 to 5 percent of cerium, and the balance of copper powder. The preparation process comprises the steps of mixing, cold pressing and sintering. In the preparation process, a general silver alloy contact is replaced by copper, so that the cost of silver alloy contacts of electric switches is reduced. The electrical contact based on the powered copper has high electrical performance and mechanical properties, and is a cheap substitute product of silver alloy materials of electrical contacts of low-voltage electric switches.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a powder copper-based electrical contact composite material for low-voltage electrical appliances, and also relates to a manufacturing process of the powder copper-based electrical contact. Background technique [0002] As a key component of low-voltage electrical appliances, electrical contacts play an important role in ensuring the safety and reliability of low-voltage electrical appliances. Therefore, the requirements for electrical contact materials are high, and qualified electrical contact materials should have physical properties such as long life, impact resistance, corrosion resistance, low resistance, good conductivity, and easy welding and processing. In order to ensure the reliability of the electrical contacts, most of them are made of precious metals such as silver and its alloy materials at home and abroad. However, due to the high price and limited resources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04C22C1/10H01H1/025
Inventor 陈长晶
Owner 温州银泰合金材料有限公司
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