Method for preparing tungsten-copper gradient composite material

A composite material and gradient technology, applied in the field of metal composite materials, can solve the problem that thermal conductivity and ablation resistance cannot be taken into account at the same time, achieve good thermal conductivity and ablation resistance, promote infiltration process, and improve effect of density

Pending Publication Date: 2021-07-09
XIAN UNIV OF 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 method for preparing tungsten-copper gradient composite materials, which solves the problem that the thermal conductivity and ablation resistance of the tungsten-copper composite materials used in the guide rails of electromagnetic rail guns in the prior art cannot be taken into account at the same time

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  • Method for preparing tungsten-copper gradient composite material
  • Method for preparing tungsten-copper gradient composite material
  • Method for preparing tungsten-copper gradient composite material

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Embodiment 1

[0059] A kind of preparation method of the method for preparing tungsten-copper gradient composite material of the present invention, specifically implement according to the following steps:

[0060] Step 1, designing a porous tungsten skeleton model with a gradient distribution of porosity;

[0061] Among them, the porous tungsten skeleton model includes three gradient layers, and the porosity of the three gradient layers increases sequentially from the side in contact with the armature to the side away from the armature, and are respectively k 1 、k 2 and k 3 , the volumes of the three gradient layers are V 1 , V 2 and V 3 ; k 1 = 65%, k 2 = 80%, k 3 =95%; the hole shape in the porous tungsten skeleton model is a cube;

[0062] Step 2, 3D printing porous gradient tungsten skeleton;

[0063] Step 2.1, place tungsten powder in the powder bin of the laser selective melting equipment, input the porous tungsten skeleton model, turn on the printing equipment, select checke...

Embodiment 2

[0077] A kind of preparation method of the method for preparing tungsten-copper gradient composite material of the present invention, specifically implement according to the following steps:

[0078] Step 1, designing a porous tungsten skeleton model with a gradient distribution of porosity;

[0079] Among them, the porous tungsten skeleton model includes three gradient layers, and the porosity of the three gradient layers increases sequentially from the side in contact with the armature to the side away from the armature, and are respectively k 1 、k 2 and k 3 , the volumes of the three gradient layers are V 1 , V 2 and V 3 ; k 1 = 65%, k 2 = 80%, k 3 =95%; the hole shape in the porous tungsten skeleton model is a regular octahedron;

[0080] Step 2, 3D printing porous gradient tungsten skeleton;

[0081] Step 2.1, place tungsten powder in the powder bin of the laser selective melting equipment, input the porous tungsten skeleton model, turn on the printing equipment,...

Embodiment 3

[0095] A kind of preparation method of the method for preparing tungsten-copper gradient composite material of the present invention, specifically implement according to the following steps:

[0096] Step 1, designing a porous tungsten skeleton model with a gradient distribution of porosity;

[0097] Among them, the porous tungsten skeleton model includes three gradient layers, and the porosity of the three gradient layers increases sequentially from the side in contact with the armature to the side away from the armature, and are respectively k 1 、k 2 and k 3 , the volumes of the three gradient layers are V 1 , V 2 and V 3 ;k 1 = 65%, k 2 = 80%, k 3 =95%; the hole shape in the porous tungsten skeleton model is a hexagonal prism;

[0098] Step 2, 3D printing porous gradient tungsten skeleton;

[0099] Step 2.1, place tungsten powder in the powder bin of the laser selective melting equipment, input the porous tungsten skeleton model, turn on the printing equipment, sel...

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Abstract

The invention discloses a method for preparing a tungsten-copper gradient composite material, which comprises the following steps of: preparing a porous tungsten framework of which the porosity is in gradient distribution by using a selective laser melting technology based on a single-component multi-copper and less-tungsten composite material, pressurizing and infiltrating copper under the protection of hydrogen, and finally, carrying out a two-pass rolling process, and carrying out annealing treatment, the tungsten-copper gradient composite material with synergistically improved heat conductivity, conductivity, strength and ablation resistance can be obtained. According to the method for preparing the tungsten-copper gradient composite material provided by the invention, the problem that in the prior art, the heat conductivity and the ablation resistance of a tungsten-copper composite material used for an electromagnetic railgun guide rail cannot be considered at the same time is solved.

Description

technical field [0001] The invention belongs to the technical field of metal composite materials, and in particular relates to a method for preparing tungsten-copper gradient composite materials. Background technique [0002] The electromagnetic railgun is a new concept weapon, which uses powerful electromagnetic energy to accelerate the projectile to a super high speed of 2-3km / s, far exceeding the range and power of traditional artillery, and its precision is controllable. Such powerful combat effectiveness makes it useful It may become a subversive weapon that rewrites the mode of future warfare. When working, a large pulse current flows through the track and the armature to form a closed loop. Since it has to withstand a megaampere current within a few milliseconds, the change rate and peak value of the electromagnetic, temperature, stress and other physical quantities of the guide rail material are extremely large, forming on the material. Huge magnetic field gradients...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F10/28C22C1/04C22F1/08B33Y10/00B33Y80/00
CPCB22F3/105C22C1/04C22F1/08B33Y10/00B33Y80/00Y02P10/25
Inventor 李荣陈文革杨雅娜周凯
Owner XIAN UNIV OF TECH
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