Preparation method of copper-tungsten alloy

A technology of copper-tungsten alloy and tungsten-copper alloy is applied in the field of preparation of copper-tungsten composite materials, which can solve the problems of unevenness, coarse structure and many voids, and achieve the effects of preventing electrical and thermal conductivity, improving mechanical properties and simple process method.

Pending Publication Date: 2021-01-26
LUOYANG KEWEI MOLYBDENUM & TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tungsten-copper alloy prepared by the traditional production process has low density, coarse and uneven structure, and many voids, which seriously affects the electrical and thermal conductivity and high-temperature mechanical properties of tungsten-copper materials.

Method used

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  • Preparation method of copper-tungsten alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of copper-tungsten alloy, concrete steps are as follows:

[0021] Step 1: Atomize and spray acidic solution on the surface of infiltrated tungsten-copper alloy parts for 2 hours, the spray rate is 50ml / min, and the particle size of atomized particles is 12μm. Wrap it in a bag, dry it in low temperature vacuum at 30°C, pressure 100mmHg, drying time 1h, and vacuumize;

[0022] Step 2. Put the tungsten-copper parts vacuum-packed in step 1 into the hot isostatic press, vacuumize, fill with argon, and take out the tungsten-copper alloy wool after cooling with the furnace. The cooling rate is 80°C, of ​​which The pressure of the hot isostatic pressing is 120MPa, the heating rate is 5°C and the temperature is heated to 600°C, and the temperature is continued to rise, and the heating rate is adjusted from 23°C to 1200°C, and the temperature is kept for 3 hours;

[0023] Step 3: Finely process the tungsten-copper alloy wool to obtain tungsten-copper...

Embodiment 2

[0026] A kind of preparation method of copper-tungsten alloy, concrete steps are as follows:

[0027] Step 1: Atomize and spray the acidic solution on the surface of the infiltrated tungsten-copper alloy for 2.5 hours, the spray rate is 55ml / min, and the particle size of the atomized particles is 15μm. After taking it out, wash it with deionized water for 3 times, and dry it in vacuum at low temperature Finally, wrap it with a bag. The temperature of low-temperature vacuum drying is 35°C, the pressure is 150mmHg, the drying time is 3h, and vacuum is applied;

[0028] Step 2. Put the tungsten-copper parts vacuum-packed in step 1 into the hot isostatic press, evacuate, fill with argon, and take out the tungsten-copper alloy wool after cooling with the furnace. The cooling rate is 100°C, where The pressure of the hot isostatic pressing is 160MPa, the heating rate is 7°C and the temperature is heated to 700°C, and the temperature is continued to rise, and the heating rate is adjus...

Embodiment 3

[0032] A kind of preparation method of copper tungsten alloy, concrete steps are as follows:

[0033] Step 1: Atomize and spray the acidic solution on the surface of the infiltrated tungsten-copper alloy for 3 hours, the spray rate is 60ml / min, and the particle size of the atomized particles is 18μm. Wrap it in a bag, dry it in a vacuum at a temperature of 40°C, a pressure of 200mmHg, a drying time of 5 hours, and vacuumize;

[0034] Step 2. Put the tungsten-copper parts vacuum-packed in step 1 into the hot isostatic press, evacuate, fill with argon, and take out the tungsten-copper alloy wool after cooling with the furnace. The cooling rate is 120°C. The pressure of the hot isostatic pressing is 200MPa, the heating rate is 8°C and the temperature is heated to 800°C, and the temperature is continued to rise, and the heating rate is adjusted to be 30°C to the temperature is 1300°C, and the temperature is kept for 5 hours;

[0035] Step 3: Finely process the tungsten-copper all...

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Abstract

The invention provides a preparation method of copper-tungsten alloy. The preparation method of copper-tungsten alloy comprises the following concrete steps of step 1, performing atomized spraying ofan acidic solution onto the surface of an infiltrated tungsten-copper alloy part for 2 to 3 h, taking out the tungsten-copper alloy part, washing the tungsten-copper alloy part with deionized water for 2 to 3 times, drying the tungsten-copper alloy part in vacuum at a low temperature, wrapping the tungsten-copper alloy part with a sheath, and performing vacuum pumping; step 2, putting the tungsten-copper part subjected to vacuum packaging in the step 1 into a hot isostatic press, performing vacuum pumping, introducing argon gas, cooling the tungsten-copper alloy part along with the furnace, and then, taking out the tungsten-copper alloy part to obtain a tungsten-copper alloy blank; and step 3, finely processing the tungsten-copper alloy blank to obtain the tungsten-copper alloy. Infiltrated W-7Cu alloy is subjected to hot isostatic pressing treatment; the density is increased from original 16.9 g/cc to 17.32 g/cc; the hardness is increased from 320 HV to 352 HV; and the military industry requirements can be met.

Description

technical field [0001] The invention belongs to the preparation of copper-tungsten composite materials, in particular to a preparation method of copper-tungsten alloy. Background technique [0002] Tungsten-copper material is an immiscible two-phase composite material composed of metal tungsten with high melting point and high hardness and metal copper with high plasticity and high conductivity. It not only combines the respective characteristics of tungsten and copper, such as high high temperature strength, high electrical and thermal conductivity, good electrical corrosion resistance, high hardness, low thermal expansion coefficient and certain shaping, but also can pass through its The composition changes, controls and adjusts its corresponding mechanical and physical properties. In addition, it also has new properties due to the combination of the two, such as its self-cooling effect due to the evaporation and heat absorption of the contained copper under high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/15C23G1/10C22C1/04C22C27/04
CPCB22F3/15C23G1/106C22C1/0475C22C1/045C22C27/04
Inventor 张灵杰
Owner LUOYANG KEWEI MOLYBDENUM & TUNGSTEN
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