Method for preparing ultrafine platy copper-zinc alloy powder

A technology of alloy powder and copper-gold powder, which is applied in the field of metal powder material preparation, can solve the problems of long production process, low quality of powder material, low production process stability and efficiency, and achieve low production cost and avoid anti-oxidation The effect of reducing reliability and increasing production efficiency

Inactive Publication Date: 2011-08-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency preparation method of ultrafine flaky copper-zinc alloy powder, using a horizontal high-energy ball mill, adjusting the machine speed, and controlling the oxidation of the alloy powder through unique water flow temperature control measures and appropriate ball milling atmosphere adjustment degree, thereby improving the luster and flaking of powder metal, and overcoming the problems of low stability and efficiency of the production process of the prior art, long production process, and low quality of the obtained powder material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Use spherical copper-zinc alloy atomized powder with a particle size of -400 mesh, 85% copper and 15% zinc as a raw material, and then use a ball-to-material weight ratio of 15:1 (the addition of steel balls is 1.95kg, copper The addition of alloy powder is 130g) and 2.2% additives (1.5% stearic acid, 0.1% palmitic acid, 0.6% polyethylene glycol) based on the weight of metal raw material powder, add stainless steel balls with a diameter of 5mm and additives and mix After uniformity, put it into the closed grinding chamber of the horizontal high-energy mixer; control the temperature of the water or oil passing into the cooling water jacket of the mixer to keep the temperature of the grinding process in the grinding chamber at 45 ° C, and pass into the grinding chamber Nitrogen, so that the oxygen content in the grinding chamber is 4%, the nitrogen gas content is 96%, and then grind for 150 minutes at a speed of 200 rpm to obtain more than 60% copper and gold po...

Embodiment 2

[0009] Example 2: Use spherical copper-zinc alloy atomized powder with a particle size of -500 mesh, 70% copper, and 30% zinc as raw material, and then use a ball-to-material weight ratio of 40:1 (the addition of steel balls is 2kg, copper alloy Adding amount of powder is 50g) and 1.6% additives (0.5% stearic acid, 1% palmitic acid, 0.1% polyethylene glycol) of metal raw material powder weight, add stainless steel balls with a diameter of 10mm and additives and mix well Finally, put it into the closed grinding chamber of the horizontal high-energy mixer; control the temperature of the water or oil passing into the cooling water jacket of the mixer to keep the temperature of the grinding process in the grinding chamber at 30 ° C, and pass argon into the grinding chamber Gas, so that the oxygen content in the grinding chamber is 10%, the argon gas content is 90%, and then grind at a speed of 1200 rpm for 120 minutes to obtain more than 75% copper-gold powder of -800 mesh; then pr...

Embodiment 3

[0010] Example 3: Use spherical copper-zinc alloy atomized powder with a particle size of -100 mesh, 95% copper, and 5% zinc as a raw material, and then use a ball-to-material weight ratio of 5:1 (the addition of steel balls is 2kg, copper alloy The amount of powder added is 400g) and 1.1% of the weight of metal raw material powder (palmitic acid 0.6%, polyethylene glycol 0.5%), add stainless steel balls with a diameter of 3mm and additives and mix well, then put it into the horizontal In the closed grinding chamber of the high-energy mixer; control the temperature of the water or oil fed into the cooling jacket of the mixer to keep the temperature of the grinding process in the grinding chamber at 100 ° C, and pass nitrogen into the grinding chamber to make the oxygen in the grinding chamber content of 7% and nitrogen content of 93%, and then grind for 15 minutes at a speed of 1800 rpm to obtain more than 60% copper-gold powder of -700 mesh; Under the same atmosphere and temp...

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Abstract

The invention relates to a method for preparing ultrafine platy copper-zinc alloy powder by using a horizontal stirring and grinding method, belonging to the technical field of preparation of metal powder material. The method comprises the steps of: mixing the copper-zinc alloy powder, grinding media and various grinding aids, putting the mixture into a sealed grinding bin of a horizontal high-energy stirring machine, introducing a protective atmosphere which mainly contains inert gas such as nitrogen and argon and the like, introducing water or oil with the temperature of 15-100 DEG C into a water cooling sleeve of a ball milling machine, controlling the rotating speeds at different stages, grinding, dispersing, modifying and grading the alloy powder to finally obtain copper alloy powder with the meshes of minus 300. In the method, the annealing process of the traditional method is abolished, and proper grinding process parameters are adopted, and the method has the advantages of short production process, high production efficiency, stable process and the like, and the prepared powder material has good platy effect and surface performance. The method also can be used for zinc-aluminum mixing ball milling and the production of powder such as zinc-aluminum alloy powder and the like, in which the degree of oxidation needs to be controlled.

Description

technical field [0001] The invention relates to a production method for preparing ultrafine flaky copper-zinc alloy powder that can be used for printing and spraying by using high-energy stirring and grinding technology, and belongs to the technical field of metal powder material preparation. Background technique [0002] The existing production process of flaky copper-zinc alloy powder is to melt electrolytic copper and electrolytic zinc, spray granulate, dry or wet roller ball mill, high temperature annealing, surface polishing modification, classification and other processes. out. This process not only has a long production process and complicated process, but also the organic additives that do not volatilize during the high-temperature annealing process will generate carbon particles on the surface of the powder particles and oxidize, thereby affecting the metallic luster and reducing the quality of the flaky copper-zinc alloy powder. quality. [0003] The patent title...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02B22F1/00
Inventor 蔡晓兰王开军裴志明蒋昱东
Owner KUNMING UNIV OF SCI & TECH
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