Ultrafine Tungsten Copper Alloy Manufacturing Process

The present invention provides an ultra-fine tungsten-copper alloy manufacturing process. WO3 powders or WO3-CuO composite oxide powder is the use of ultra-low temperature 60 ~ 120 ℃ air ultrasonic spray pyrolysis turn preparation of ultrafine nano-oxide powder. Specific steps are as follows:

1) Restore: low-temperature heat transfer prepared by ultrasonic spray nano or ultrafine WO3 WO3-CuO composite oxide powder as raw material, two H2 gas reduction, the first paragraph of reduction temperature of 380 ~ 5000 ℃, insulation 30 ~ 60 minutes; first made (WO2.9) ultrafine tungsten powder blue;

2) And then restore the second temperature is 700 ~ 780 ℃, kept for 40 to 60 minutes, using a tubular-type reduction apparatus reducing furnace to prepare a W W-Cu alloy powder or powders; reduction Sec above chemical reaction formula is as follows :

Restore the first paragraph: WO3 + 0.1H2 * WO2.9 + 3H2O ............... (1)

Second reduction; WO2.9 + 2.9H2 * W + 2.9H2O ............... (2)
Cu2O3 + H2 * 2Cu + 3H2 ............... (3)

3) High shear pulverization: The ultrafine copper tungsten alloy powder in a high shear mill pulverizing treatment, the rotational speed of 8000 to 30000 rev / min, the grinding time is 30-60 minutes;

4) Forming: This alloy powder using conventional steel forming unit pressure 200 ~ 800MPa, made ​​compacts;

5) Sintering: The green compacts H2 atmosphere for sintering the sintering furnace, heat 1000 ~ 1400 ℃ 30 ~ 80 minutes to obtain an average particle diameter of the tungsten-copper alloy ≤1.5μm.


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