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Manufacturing method of high-green-strength atomized copper powder

A technology of atomizing copper powder and green strength, which is applied in the field of metal powder materials and powder metallurgy, can solve the problems of surrounding ecological environment pollution, etc., and achieve the effects of improving green strength, increasing surface tension, and increasing viscosity

Inactive Publication Date: 2014-09-10
铜陵国传电子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that sulfuric acid solution is used in the production process, which causes serious pollution to the surrounding ecological environment. Western developed countries are gradually reducing the production of electrolytic copper powder

Method used

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  • Manufacturing method of high-green-strength atomized copper powder
  • Manufacturing method of high-green-strength atomized copper powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for making atomized copper powder with high green strength, specifically comprising the following steps:

[0029] 1. Smelting treatment: put the solid pure copper raw material in a melting furnace to melt to obtain liquid copper. The temperature of the melting furnace is 1350°C. During the melting process, oxygenation treatment is carried out. The oxygenation treatment is to add oxygen into the furnace to make the melting after oxygenation The oxygen mass percentage content of the copper liquid is 15%, and the oxygen-increasing treatment may be to blow pure oxygen to the molten metal copper in the melting furnace.

[0030] 2. Atomization treatment: When the liquid copper flows out of the furnace, the atomized copper powder is sprayed out using a closed V-shaped nozzle under a high pressure condition of 30PMa.

[0031] 3. Drying treatment: Dry the copper powder obtained by the atomization treatment in step 2. The drying condition is centrifuge dehydration and dr...

Embodiment 2

[0037] A method for making atomized copper powder with high green strength, specifically comprising the following steps:

[0038] 1. Smelting treatment: put the solid pure copper raw material in the melting furnace to melt to obtain liquid copper. The temperature of the melting furnace is 1450°C. During the melting process, oxygenation treatment is carried out. The oxygenation treatment is to add oxygen into the furnace to make the melting after oxygenation The oxygen mass percentage content of the copper liquid is 8%, and the oxygen-increasing treatment may be to blow pure oxygen to the molten metal copper in the melting furnace.

[0039] 2. Atomization treatment: When liquid copper flows out of the furnace, atomized copper powder is sprayed out using a closed V-shaped nozzle under a high pressure condition of 29PMa.

[0040] 3. Drying treatment: drying the copper powder obtained by the atomization treatment in step 2, the drying is vacuum heating treatment, the vacuum heatin...

Embodiment 3

[0044] A method for making atomized copper powder with high green strength, specifically comprising the following steps:

[0045] 1. Smelting treatment: put the solid pure copper raw material in the melting furnace to melt to obtain liquid copper. The temperature of the melting furnace is 1400 ° C. During the melting process, oxygenation treatment is carried out. The oxygenation treatment is to add oxygen into the furnace to make the melting after oxygenation The oxygen mass percentage content of the copper liquid is 10%, and the oxygen-increasing treatment may be to blow pure oxygen to the molten metal copper in the melting furnace.

[0046] 2. Atomization treatment: When the liquid copper flows out of the furnace, the atomized copper powder is sprayed out using a closed V-shaped nozzle under a high pressure condition of 32PMa.

[0047] 3. Drying treatment: drying the copper powder obtained from the atomization treatment in step 2. The drying includes centrifuge dehydration d...

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Abstract

The invention discloses a manufacturing method of high-green-strength atomized copper powder. The manufacturing method includes steps of smelting, specifically, placing solid-state pure-copper materials into a smelter and smelting to obtain liquid-state copper, and oxygenating during smelting; atomizing, ejecting atomized copper powder by a closed type V-shaped nozzle under the condition of high pressure when the liquid-state copper flows out of the smelter; drying, to be specifically, drying the copper powder subjected to atomization; reduction, reducing the dried copper powder by reducing gas; after-treatment, more specifically, coarsely crushing the reduced copper powder by a hammer mill, then finely crushing by a turbo type mill, finally screening by an ultrasonic screening machine with copper granularity of 150-600 meshes to obtain high-green-strength atomized copper powder. The manufacturing method of the high-green-strength atomized copper powder can manufacture copper powder in various and complicated shape, green strength of the copper powder is effectively improved, and loose-packed density of the copper powder is reduced.

Description

technical field [0001] The invention belongs to the field of metal powder materials and powder metallurgy, and in particular relates to a green body whose strength is higher than 15MPa and whose bulk density is lower than 2.0g / cm 3 Atomized copper powder and preparation method thereof. Background technique [0002] In the current powder metallurgy industry, copper powder is a widely used powder, especially widely used in oil-impregnated bearings, brush products, friction materials, electrical materials and other industries. [0003] At present, the bulk density of commercialized water atomized copper powder is generally 2.5g / cm3-3.5g / cm3, and a few enterprises can produce copper powder with low bulk density of 2.0g / cm3-2.5g / cm3, but The green body strength of water atomized copper powder is very low, generally no more than 5MPa, and it can only be added in a small proportion in some metallurgical products. [0004] Electrolytic copper powder uses copper sulfate as the elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08B22F1/00
Inventor 汤传舵
Owner 铜陵国传电子材料科技有限公司
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