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Copper-tungsten-carbon-titanium-rare earth alloy material and production thereof

A technology of rare earth alloy and tungsten carbide, which is applied in the field of material chemistry, can solve the problems of Cu-WC series materials, such as the limitation of applicability and satisfaction, unstable internal structure, poor processability and processability, etc., and reduce the oxidation of contact surface Formation of film, improvement of manufacturability and mechanical properties, effect of performance improvement

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

[0002] Conventional Cu-WC (copper-tungsten carbide) series materials are composed of WC (tungsten carbide), an oxidation-resistant material with high hardness, high melting point, low vapor pressure, and good chemical stability, and Cu (copper) with good electrical conductivity. It is an electric contact composite material with good arc resistance, low burning loss and excellent welding resistance. The mass percentage of WC in the conventional Cu-WC series materials is 40-60%. The biggest problem in the use of such materials Because the WC content is too high and the conductivity is low, an oxide film is easily formed on the surface of the contact, which increases the resistance, deteriorates the conductivity, and damages the electrical appliance due to overheating of the contact. This type of contact is only used for higher current. Switches, circuit breakers, etc., but it is not suitable for low-voltage electrical switches and circuit breakers with medium current
This kind of material is composed of elements that are incompatible with each other in the molten state, and its processability and craftsmanship are relatively poor. It can only be manufactured by powder metallurgy. These processes make the internal structure of the material unstable and affect the quality of the material. Effect
The above defects limit the applicability and satisfaction of the Cu-WC series materials in many fields, therefore, it is urgent to solve the above problems

Method used

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  • Copper-tungsten-carbon-titanium-rare earth alloy material and production thereof
  • Copper-tungsten-carbon-titanium-rare earth alloy material and production thereof
  • Copper-tungsten-carbon-titanium-rare earth alloy material and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Mixing: Weigh 5kg of WC, 1kg of C, 0.8kg of Ti, 0.1kg of La, and 93.1kg of Cu according to the formula, pass through a 80-200 mesh sieve after crushing, put into a mixing tank, and mix for 1-3 hours.

[0044] 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

[0045] Pulverized in a high energy ball mill.

[0046] 3. Granulation: Put the powder prepared in step 2 into a granulator, add paraffin to g...

Embodiment 2

[0053] 1. Mixing: Weigh 12kg of WC, 2.5kg of C, 1.2kg of Ti, 1.0kg of La, and 83.3kg of Cu according to the formula, pass through an 80-mesh sieve after crushing, put into a mixing tank, and mix for 1 hour.

[0054] 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.

[0055] 3. Granulation: Put the powder prepared in step 2 into a granulator, add stearic acid to granulate, and the mass ratio of stearic acid to powder is 0.02-0.03:1. Then transfer the granulated material to a box-type resistance furnace and heat at 700°C for 3 hou...

Embodiment 3-7

[0062] The copper-tungsten carbide-carbon-titanium-rare earth alloy material was prepared by the same method as in Example 1. The names and proportions of specific raw materials used in Examples 3-7 are shown in Table 1.

[0063] raw material name

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Abstract

An alloy material of Cu-tungsten carbide-C-Ti-RE is consists of Cu, WC, C, Ti, rare-earth. The material decrease the content of the 'WC' and increase the content of 'Cu' so improve the conductance, as a result, it can control the temperature of the material. The material which added proper C and Ti, RE can improve the non-fusibility, wearability, arc resistance, life of the electricity. The process can improve the fine structure of the histology so the material can be used from the high-current switch, circuit breaker to majority medium-current switch. Especially, it can save the silver and have good market future.

Description

technical field [0001] The invention relates to a copper-tungsten carbide-carbon-titanium-rare earth alloy material and a preparation method thereof, belonging to the field of material chemistry. Background technique [0002] Conventional Cu-WC (copper-tungsten carbide) series materials are composed of WC (tungsten carbide), an oxidation-resistant material with high hardness, high melting point, low vapor pressure, and good chemical stability, and Cu (copper) with good electrical conductivity. It is an electric contact composite material with good arc resistance, low burning loss and excellent welding resistance. The mass percentage of WC in conventional Cu-WC series materials is 40-60%. The biggest problem in the use of such materials Because the WC content is too high and the conductivity is low, an oxide film is easy to form on the surface of the contact, which increases the resistance, deteriorates the conductivity, and damages the electrical appliance due to overheating...

Claims

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Application Information

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IPC IPC(8): C22C9/00
Inventor 陈晓
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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