Silver-copper-carbon-rare earth alloy material and production thereof

A technology of rare earth alloys and alloy materials, applied in the field of material chemistry, can solve problems such as insufficient electrical conductivity, wear resistance and self-lubrication, and poor welding performance, and achieve poor electrical corrosion resistance, excellent performance, and obvious technical advantages Effect

Active Publication Date: 2005-07-27
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ag-C and Cu-C alloys are composed of two elements that are not easy to fuse together, and can only be prepared by powder metallurgy. Their ductility and processing performance are far lower than other electrical contact materials. The most important thing is that this kind of material has poor welding performance. In order to have good welding performance with the contact bridge, it is necessary to pave silver on a plane of the contact or use a decarburization process to solve the welding problem, while Cu-C cannot be welded, only inlaid , clamping method to fix, and other materials used for electrical contact have great deficiencies in terms of conductivity, wear resistance and self-lubricating properties

Method used

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  • Silver-copper-carbon-rare earth alloy material and production thereof
  • Silver-copper-carbon-rare earth alloy material and production thereof
  • Silver-copper-carbon-rare earth alloy material and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Mixing: Weigh 10kg of Cu, 2kg of C, 0.1kg of rare earth, and 87.9kg of Ag for each component according to the formula, pass through an 80-mesh sieve after crushing, put into a mixing tank, and mix for 1 hour.

[0046] 2. Mechanical alloying reaction: Put the mixed powder into the material tank of the high-energy ball mill, put steel balls and grinding blocks with a volume three times the powder volume, seal the tank mouth, vacuumize to -0.1Mpa, and then Fill in 0.03Mpa nitrogen as a protective gas, turn on the cooling system and control system of the high-energy ball mill, and mechanically alloy for 5 hours; after the powder in the high-energy ball mill is cooled, take out the powder, pass through a 200-mesh sieve, and use a particle size smaller than 200 mesh Powder, the powder that cannot pass through the 200-mesh sieve is put back into the high-energy ball mill for crushing.

[0047] 3. Low-temperature annealing: using the existing technology, the powder prepared ...

Embodiment 2

[0055] 1. Mixing: Weigh 40kg of Cu, 10kg of C, 2.0kg of rare earth, and 48kg of Ag for each component according to the formula, pass through a 400-mesh sieve after crushing, put into a mixing tank, and mix for 3 hours.

[0056] 2. Mechanical alloying reaction: Put the mixed powder into the material tank of the high-energy ball mill, put steel balls and grinding blocks with a volume 5 times the powder volume, seal the tank mouth, vacuumize to -0.1Mpa, and then Fill in 0.03Mpa nitrogen as a protective gas, turn on the cooling system and control system of the high-energy ball mill, and mechanically alloy for 10 hours; after the powder in the high-energy ball mill is cooled, take out the powder and pass through a 200-mesh sieve.

[0057] 3. Low-temperature annealing: using the existing technology, the powder prepared in step 2 is subjected to low-temperature stress-relief annealing at a temperature of 500-550° C. with hydrogen as a protective gas, and the annealing time is 2 hours....

Embodiment 3

[0065] 1. Mixing: Weigh 25Kg of Cu, C3 Kg, 0.5 Kg of rare earth, and 71.5Kg of Ag for each component according to the formula, pass through a 200-mesh sieve after crushing, put into a mixing tank, and mix for 2.5 hours.

[0066] 2. Mechanical alloying reaction: put the mixed powder into the material tank of the high-energy ball mill, put steel balls and grinding blocks whose volume is 4 times the powder volume, seal the tank mouth, vacuumize to -0.1Mpa, and then Fill in 0.03Mpa nitrogen as a protective gas, turn on the cooling system and control system of the high-energy ball mill, and perform mechanical alloying for 7.5 hours; after the powder in the high-energy ball mill is cooled, take out the powder and pass through a 200-mesh sieve.

[0067] 3. Low-temperature annealing: the powder prepared in step 2 is subjected to low-temperature stress-relief annealing at a temperature of 500-550° C. using hydrogen as a protective gas, and the annealing time is 2 hours.

[0068] 4. Hot...

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Abstract

One kind of alloy that composed by Ag-Cu-C-RE has a good material electricity property. Add Cu and rare-earth element in Ag-C material to form one kind of Ag-Cu-C-RE alloy that synthesized by the method of mechanical composition. Its advantages: a good property; a lower cost by using Cu and RE; obvious technology advantage and marker competitive; and fit for the national policy of saving Ag; can yield good economic returns and social returns.

Description

technical field [0001] The invention relates to a silver-copper-carbon-rare earth alloy material and a preparation method thereof, belonging to the field of material chemistry. Background technique [0002] Ag-C (silver-carbon alloy) material has good electrical conductivity, excellent wear resistance and self-lubricating properties, low and stable contact resistance, especially the resistance to fusion welding is unmatched by other contact materials, and it is also the current low-voltage electrical appliance It is the preferred material for circuit breakers and protection switches with medium current loads, so it is used in large quantities and has a wide range of applications. In long-term use, it is found that pure Ag-C alloy materials have poor electrical corrosion resistance, and metal migration is serious in certain occasions. [0003] Cu-C (copper-carbon alloy) is an alloy with similar properties to Ag-C, and it is superior to Ag-C in certain characteristics such as...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C5/08C22C30/02C22F1/00
Inventor 陈晓
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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