A kind of tungsten reinforced copper composite material and preparation method thereof

Abstract

A tungsten-reinforced copper composite material disclosed by the present invention comprises the following components according to the volume fraction, copper powder is not less than 50%, the balance is tungsten powder, and the sum of the volume percentages of the above components is 100%; A method for preparing a tungsten-reinforced copper composite material is disclosed. A tungsten-reinforced copper composite material of the present invention adopts the ratio of less tungsten and more copper, fully exerts the high-temperature characteristics of insoluble metal tungsten and the high-conductivity characteristics of low-melting-point metal copper, and realizes high-temperature resistance and good conduction. Special requirements; the preparation method of the present invention adopts laser selective melting technology to prepare porous tungsten skeleton. The shape, quantity and size of tungsten skeleton pores are precisely controllable, and the tungsten skeleton is metallurgically combined with high strength, isotropy, and network shape. The binder phase copper is fully filled in the porous tungsten skeleton by infiltration technology to prepare high-density tungsten-reinforced copper composite materials that can be used in various environments, which has good practical value.

Description

technical field

[0001] The invention belongs to the technical field of metal composite materials, and in particular relates to a tungsten-reinforced copper composite material, and also relates to a preparation method of the tungsten-reinforced copper composite material. Background technique

[0002] Tungsten-copper composite material is a typical pseudo-alloy system. The constituent tungsten has a high melting point (3420°C), high strength, arc ablation resistance, high electrical conductivity (174W / m K), and low nuclear fuel retention rate; Component copper has the characteristics of high electrical conductivity and high thermal conductivity (about 400W / m·K at room temperature). It can be seen from the phase diagram that copper and tungsten have no intermediate phase, which on the one hand enables the respective characteristics of the two component metals to be brought into play; on the other hand, different performance requirements can be obtained by adjusting different co...

Examples

preparation example Construction

[0042] A preparation method of tungsten reinforced copper composite material, comprising the following steps:

[0043] Step 1, select raw materials

[0044] According to the volume fraction, weigh the following components, the copper powder is not less than 50%, the balance is tungsten powder, and the sum of the volume percentages of the above components is 100%;

[0045] Step 2, preparing a porous tungsten skeleton;

[0046] Step 2.1, place the tungsten powder in step 1 in the powder loading chamber of the laser selective melting equipment, input the prefabricated porous tungsten skeleton model, start the laser selective melting equipment to print, the diameter of the spot is 45-100 μm, and the scanning method is checkerboard. One time of powder is selected by laser melting once, the scanning distance is 60μm, the scanning speed is 550-650mm / s, the thickness of the powder layer is 25μm, the laser power is 70W-100W, and the laser energy is 80-130J / mm 3 , continuous inert gas...

Embodiment 1

[0062] Objective: To prepare anisotropic copper-tungsten composite material, wherein the volume ratio of Cu is 60vol.%, and the volume ratio of W powder is 40vol.%.

[0063] Step 1, select raw materials

[0064] According to the volume fraction, weigh the following components, copper powder 60vol.%, the balance is tungsten powder, the particle size of pure tungsten powder is 15-53 μm, and the sum of the volume percentages of the above components is 100%;

[0065] Step 2, preparing a porous tungsten skeleton;

[0066] Step 2.1, place the tungsten powder in step 1 in the powder bin of the laser selective melting equipment, try to keep the upper surface of the powder in the bin as flat as possible, input the prefabricated porous tungsten skeleton model, and start the laser selective melting equipment to print, the spot diameter is 100 μm , the scanning method is checkerboard, every time the powder is laid, the laser selection is melted once, the scanning distance is 60μm, the sc...

Embodiment 2

[0079] Objective: To prepare anisotropic copper-tungsten composite material, wherein the volume ratio of Cu is 90vol.%, and the volume ratio of W powder is 10vol.%.

[0080] Step 1, select raw materials

[0081] According to the volume fraction, weigh the following components, the volume ratio of copper powder Cu is 90vol.%, the balance is tungsten powder, and the sum of the volume percentages of the above components is 100%;

[0082] Step 2, preparing a porous tungsten skeleton;

[0083] Step 2.1, place the tungsten powder in step 1 in the powder loading chamber of the laser selective melting equipment, input the prefabricated porous tungsten skeleton model, start the laser selective melting equipment to print, the diameter of the spot is 80 μm, the scanning method is checkerboard, and the powder is laid once The laser selects melting once, the scanning distance is 60μm, the scanning speed is 600mm / s, the thickness of the powder layer is 25μm, the laser power is 100W, and th...

technical field

[0001] The invention belongs to the technical field of metal composite materials, and in particular relates to a tungsten-reinforced copper composite material, and also relates to a preparation method of the tungsten-reinforced copper composite material. Background technique

[0002] Tungsten-copper composite material is a typical pseudo-alloy system. The constituent tungsten has a high melting point (3420°C), high strength, arc ablation resistance, high electrical conductivity (174W / m K), and low nuclear fuel retention rate; Component copper has the characteristics of high electrical conductivity and high thermal conductivity (about 400W / m·K at room temperature). It can be seen from the phase diagram that copper and tungsten have no intermediate phase, which on the one hand enables the respective characteristics of the two component metals to be brought into play; on the other hand, different performance requirements can be obtained by adjusting different co...

Examples

preparation example Construction

[0042] A preparation method of tungsten reinforced copper composite material, comprising the following steps:

[0043] Step 1, select raw materials

[0044] According to the volume fraction, weigh the following components, the copper powder is not less than 50%, the balance is tungsten powder, and the sum of the volume percentages of the above components is 100%;

[0045] Step 2, preparing a porous tungsten skeleton;

[0046] Step 2.1, place the tungsten powder in step 1 in the powder loading chamber of the laser selective melting equipment, input the prefabricated porous tungsten skeleton model, start the laser selective melting equipment to print, the diameter of the spot is 45-100 μm, and the scanning method is checkerboard. One time of powder is selected by laser melting once, the scanning distance is 60μm, the scanning speed is 550-650mm / s, the thickness of the powder layer is 25μm, the laser power is 70W-100W, and the laser energy is 80-130J / mm 3 , continuous inert gas...

Embodiment 1

[0062] Objective: To prepare anisotropic copper-tungsten composite material, wherein the volume ratio of Cu is 60vol.%, and the volume ratio of W powder is 40vol.%.

[0063] Step 1, select raw materials

[0064] According to the volume fraction, weigh the following components, copper powder 60vol.%, the balance is tungsten powder, the particle size of pure tungsten powder is 15-53 μm, and the sum of the volume percentages of the above components is 100%;

[0065] Step 2, preparing a porous tungsten skeleton;

[0066] Step 2.1, place the tungsten powder in step 1 in the powder bin of the laser selective melting equipment, try to keep the upper surface of the powder in the bin as flat as possible, input the prefabricated porous tungsten skeleton model, and start the laser selective melting equipment to print, the spot diameter is 100 μm , the scanning method is checkerboard, every time the powder is laid, the laser selection is melted once, the scanning distance is 60μm, the sc...

Embodiment 2

[0079] Objective: To prepare anisotropic copper-tungsten composite material, wherein the volume ratio of Cu is 90vol.%, and the volume ratio of W powder is 10vol.%.

[0080] Step 1, select raw materials

[0081] According to the volume fraction, weigh the following components, the volume ratio of copper powder Cu is 90vol.%, the balance is tungsten powder, and the sum of the volume percentages of the above components is 100%;

[0082] Step 2, preparing a porous tungsten skeleton;

[0083] Step 2.1, place the tungsten powder in step 1 in the powder loading chamber of the laser selective melting equipment, input the prefabricated porous tungsten skeleton model, start the laser selective melting equipment to print, the diameter of the spot is 80 μm, the scanning method is checkerboard, and the powder is laid once The laser selects melting once, the scanning distance is 60μm, the scanning speed is 600mm / s, the thickness of the powder layer is 25μm, the laser power is 100W, and th...

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