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Preparation method of mechanical alloying copper-tungsten alloy powder

A mechanical alloying, copper-tungsten alloy technology, applied in the field of metal alloy materials, can solve the problems of poor flow performance of copper-tungsten alloy powder, poor uniformity of composition distribution, environmental pollution, etc., and achieve good flow performance, large powder particles, The effect of uniform composition

Active Publication Date: 2015-11-18
KUN SHAN DOTOP METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method is to spray dry the precursor solution of copper tungsten to form a powder or use a precipitant to produce a precipitate, then bake it to form a mixture of copper oxide and tungsten oxide, and then reduce it to a nano-copper-tungsten composite powder by hydrogen, but the chemical method requires It is carried out under high temperature conditions, the process is complicated, and corrosive substances are used or generated in the process, which is easy to cause environmental pollution. The prepared copper-tungsten alloy powder has poor fluidity, poor component distribution uniformity, and the particles are too small to measure. Produce

Method used

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  • Preparation method of mechanical alloying copper-tungsten alloy powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Prepare tungsten powder and copper powder in proportion to make copper-tungsten composite powder, and put them into a high-energy stirring mill; in the tungsten-copper composite powder, the copper powder is atomized copper powder of 100 mesh to 300 mesh, accounting for 80wt%. The rest is tungsten powder, crystalline tungsten powder of -320 mesh;

[0032] 2) In the stirring mill, add ball milling medium and grinding balls, wherein the ball milling medium is a volatile organic solvent, accounting for 0.5% of the mass of the copper-tungsten composite powder; The mass ratio is 60:1;

[0033] 3) Fill the stirring mill with nitrogen, the stirring mill has its own circulating cooling water, the ball milling time is 2 hours at room temperature, and the ball milling speed is 500r / min;

[0034] 4) After ball milling, put it into a stabilization container, fill it with nitrogen, and cool it down for 30 minutes;

[0035] 5) After cooling, pass through the steel belt furnace, t...

Embodiment 2

[0041] 1) Prepare tungsten powder and copper powder in proportion to make copper-tungsten composite powder, and put them into a high-energy stirring mill; in the tungsten-copper composite powder, the copper powder is atomized copper powder of 100 mesh to 300 mesh, accounting for 60wt%. The rest is tungsten powder, crystalline tungsten powder of -320 mesh;

[0042] 2) In the stirring mill, add ball milling media and balls, wherein the ball milling media is a volatile organic solvent, accounting for 1% of the mass of the copper-tungsten composite powder; the balls are cemented carbide balls, and the balls are compounded with copper-tungsten The mass ratio of powder is 40:1;

[0043] 3) Fill the stirring mill with nitrogen, the stirring mill has its own circulating cooling water, the ball milling time is 3 hours at room temperature, and the ball milling speed is 400r / min;

[0044] 4) After ball milling, put it into a stabilization container, fill it with nitrogen, and cool it do...

Embodiment 3

[0051] 1) Prepare tungsten powder and copper powder in proportion to make copper-tungsten composite powder, and put them into a high-energy stirring mill; in the tungsten-copper composite powder, the copper powder is atomized copper powder of 100 mesh to 300 mesh, accounting for 40wt%. The rest is tungsten powder, crystalline tungsten powder of -320 mesh;

[0052] 2) In the stirring mill, add ball milling medium and grinding balls, wherein the ball milling medium is a volatile organic solvent, accounting for 2% of the mass of the copper-tungsten composite powder; The mass ratio is 20:1;

[0053] 3) Fill the stirring mill with nitrogen, the stirring mill has its own circulating cooling water, the ball milling time is 5 hours at room temperature, and the ball milling speed is 300r / min;

[0054]4) After ball milling, put it into a stabilization container, fill it with nitrogen, and cool it down for 30 minutes;

[0055] 5) After cooling, pass through the steel belt furnace, the ...

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Abstract

The invention discloses a preparation method of mechanical alloying copper-tungsten alloy powder. Atomized copper powder and crystallized tungsten powder are selected as raw materials; a ball milling medium, in particular a volatile organic solvent as the ball milling medium is added for wet grinding; the wet grinding enables powder grains to be fine; the components are uniform; the powder oxidized degree is reduced; the increment of forming density is facilitated; a mechanical alloying method with a high ball-material ratio is adopted, so that tungsten particles are embedded in copper particles through high-energy collision under the condition of normal temperature to form supersaturated solid solution alloy powder; and finally, the ball milling medium is removed to obtain the mechanical alloying copper-tungsten alloy powder. The tungsten-copper alloy powder, obtained by the method, has such characteristics as larger particles, uniform components, excellent forming capacity, excellent flowing performance, easy formation and easy segregation; and the preparation method is simple in process and easy to operate.

Description

technical field [0001] The invention relates to the technical field of metal alloy materials, in particular to a method for preparing mechanically alloyed copper-tungsten alloy powder. Background technique [0002] Copper-tungsten alloy material is a composite material composed of copper with high electrical conductivity and thermal conductivity and tungsten with high melting point and low thermal expansion coefficient. It is widely used in electronic packaging materials and heat sink materials due to the combination of the respective advantages of copper and tungsten. , electrical contact materials, electrode materials and other materials. [0003] Copper and tungsten are immiscible in solid and liquid states, no chemical reaction occurs after uniform mixing, and each maintains its original physical and mechanical properties. Powder metallurgy is the main way to prepare copper-tungsten alloy materials. Tungsten forms a skeleton in the alloy, copper penetrates into the gap ...

Claims

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Application Information

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IPC IPC(8): B22F9/04
Inventor 朱胜利郭殿月陈文华王汉宁
Owner KUN SHAN DOTOP METAL TECH CO LTD
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