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Method for preparing tungsten molybdenum copper composite material

A composite material, tungsten-molybdenum technology, applied in the field of preparation of tungsten-molybdenum-copper composite materials, can solve the problems of immature production and application, difficulty in completely discharging pores, and difficulty in densification of sintered bodies, so as to achieve high density, eliminate carbonization, The effect of reducing the mixing time

Active Publication Date: 2015-06-10
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small wetting angle of tungsten, molybdenum and copper, it is difficult to completely discharge the internal pores of tungsten-copper, molybdenum-copper and tungsten-molybdenum-copper sintered body, and it is difficult to completely densify the sintered body
At present, most of the preparation methods of the above-mentioned tungsten-copper, molybdenum-copper, and tungsten-molybdenum-copper composite materials are in the stage of laboratory research and development, and are not mature enough for mass production and application.

Method used

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  • Method for preparing tungsten molybdenum copper composite material
  • Method for preparing tungsten molybdenum copper composite material
  • Method for preparing tungsten molybdenum copper composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of W60Mo20Cu20 Composite Material

[0032] Step 1. Sieve the tungsten powder with a Fisher’s particle size of 1.0 μm and the molybdenum powder with a Fisher’s particle size of 3.5 μm, respectively, using a 200 mesh / 300 mesh / 400 mesh multi-stage sieve to obtain tungsten with a Fisher’s particle size of 1.5 μm. powder and molybdenum powder with a Fischer particle size of 3 μm, then add 6 kg of tungsten powder with a Fischer particle size of 1.5 μm and 2 kg of molybdenum powder with a Fischer particle size of 3 μm into a molybdenum ball mill tank, and use 8 kgФ5 molybdenum balls to mix for 60 minutes Finally, the mixed powder of tungsten and molybdenum is obtained;

[0033] Step 2. Weigh 1100g of the tungsten-molybdenum mixed powder described in step 1, put it into a mold cavity with a length and width of 50mm and 100mm respectively, and use a hydraulic press to limit the pressure to a height of 20mm to obtain a porosity of 35%. 20×50×100mm tungsten and molybd...

Embodiment 2

[0039] Preparation of W30Mo40Cu30 Composite Material

[0040] Step 1. Sieve the tungsten powder with a Fisher’s particle size of 1.0 μm and the molybdenum powder with a Fisher’s particle size of 3.5 μm, respectively, using a 200 mesh / 300 mesh / 400 mesh multi-stage sieve to obtain tungsten with a Fisher’s particle size of 1.5 μm. powder and molybdenum powder with a Fischer particle size of 3 μm, then add 3 kg of tungsten powder with a Fischer particle size of 1.5 μm and 4 kg of molybdenum powder with a Fischer particle size of 3 μm into a molybdenum ball mill tank, and use 7 kgФ5 molybdenum balls to mix for 120 minutes Finally, the mixed powder of tungsten and molybdenum is obtained;

[0041] Step 2. Weigh 1250g of the tungsten-molybdenum mixed powder described in step 1, put it into a mold cavity with a length and a width of 50mm and 100mm respectively, and use a hydraulic press to limit the pressure to a height of 30mm to obtain a porosity of 41%. 30×50×100mm tungsten-molybde...

Embodiment 3

[0047] Preparation of W10Mo50Cu40 Composite Material

[0048] Step 1. Sieve the tungsten powder with a Fisher’s particle size of 1.0 μm and the molybdenum powder with a Fisher’s particle size of 3.5 μm, respectively, using a 200 mesh / 300 mesh / 400 mesh multi-stage sieve to obtain tungsten with a Fisher’s particle size of 1.5 μm. powder and molybdenum powder with a Fischer particle size of 3 μm, then add 1.2 kg of tungsten powder with a Fischer particle size of 1.5 μm and 6 kg of molybdenum powder with a Fischer particle size of 3 μm into the molybdenum ball mill tank, and use 7.2 kgФ5 molybdenum balls for ball milling After mixing for 240 minutes, tungsten-molybdenum mixed powder was obtained;

[0049] Step 2. Weigh 1250g of the tungsten-molybdenum mixed powder described in step 1, put it into a mold cavity with a length and width of 50mm and 100mm respectively, and use a hydraulic press to limit the pressure to a height of 40mm to obtain a porosity of 45%. 40×50×100mm tungste...

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Abstract

The invention discloses a method for preparing a tungsten molybdenum copper composite material. The method comprises the steps of 1, ball grinding to obtain tungsten molybdenum mixed powder after screening tungsten powder and molybdenum powder; 2, pressing the tungsten molybdenum mixed powder into a tungsten molybdenum billet; 3, putting the tungsten molybdenum billet on a heating furnace to prepare a tungsten molybdenum skeleton; 4, putting a silicon nitride crucible with an oxygen-free copper plate into the heating furnace, and putting the tungsten molybdenum skeleton above the silicon nitride crucible by a silicon nitride hanging scaffold, heating under a vacuum condition, and then feeding to copper solution to infiltrate; and 5, closing vacuum, and charging argon to the heating furnace, lifting the silicon nitride hanging scaffold to separate from the copper solution, cooling and discharging after cooling to obtain the tungsten molybdenum copper composite material. By adopting the method disclosed by the invention, the machining procedure is saved; the material is saved; the technology is simplified; the method is easy to implement; the tungsten molybdenum copper composite material prepared by the method is low in content of impurity elements such as C, O, Fe and Ni, and high in compactness; and the relative density can be up to over 99.2%.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of a tungsten-molybdenum-copper composite material. Background technique [0002] Tungsten-copper "alloys" and molybdenum-copper "alloys" are often called "pseudo-alloys" because tungsten, molybdenum and copper are difficult to form alloys in the true sense. They are essentially composite materials composed of two-phase or several-phase metals. Usually tungsten and molybdenum are used as the base material of composite materials because of their high melting point, high temperature strength, excellent ablation resistance and low thermal expansion coefficient, and copper is used as the composite phase of composite materials because of their excellent thermal conductivity, electrical conductivity and good plasticity. [0003] At present, the preparation methods of tungsten-copper and molybdenum-copper composite materials mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C27/04C22C30/02
Inventor 赵虎庄飞刘仁智刘俊怀张常乐
Owner JINDUICHENG MOLYBDENUM CO LTD
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