Tungsten-Rhenium Wire Production Process

Tungsten-rhenium wire surface is smooth, no glitches, uniform diameter.

Tungsten-Rhenium Wire Production Process

Preparation of raw materials - raw materials separation - mixing - reduction treatment - second mixing - Pressed Sintered - swaging, drawing processing - Finished

1 Raw material preparation: raw materials for the tungsten powder and ammonium perrhenate powder, tungsten powder particle size less than 4um, ammonium perrhenate size of less than 200um

2.Separating material: tungsten powder and powder of ammonium perrhenate were separated in the separator, so that agglomerated particles well dispersed

3. Mixing: The separation had separated ammonium tungsten powder and rhenium powder together into efficient mixer for mixing, mixing time 10-24 hours

4. Reduction treatment: mixed alloy powder under the protection of the hydrogen reduction treatment. Reduction treatment is divided into three phases:

First stage: reduction temperature 200-350 ° Time 1-2h
Second stage: reduction temperature 400-600 ° Time 1-2h
Third stage: the reduction temperature 700-900 ° Time 1-2h

The processing time for each stage according to the processing equipment conditions, furnace volume, loading capacity may be

5.Second Mixture
The restored again into high alloy powder were mixed mixer, mixing time 8-20h

6.Pressed Sintered
For the second time after mixing the alloy powder pressed into a billet, billet temperature of 1100-1300 ° now and hydrogen under the protection of pre-sintering time 0.4-1h, after the pre-sintered billet at a temperature of 2600-3000 ° and hydrogen under the protection of the final vertical melt sintering time 1-2h

7.Swaging, Drawing Processing
Sintered billet in rotary swaging machine for swaging processed into thin rods, thin rods made ​​in wire drawing machine pull tungsten rhenium alloy wire.


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