Method for Producing High-pressure Blank Intensity Tungsten Powder by Ammonium Paratungstate Direct Reduction

The invention belongs to the field of powder metallurgy to paratungstate as raw materials, high-pressure direct reduction of green strength of tungsten powder production methods.

Comprising at 700 ~ 1000 ℃ and a hydrogen atmosphere and a hydrogen reduction treatment using recycled, screening impurity. The invention is in the reduction treatment process to avoid the deposition of the tungsten powder to grow up, and incomplete development of the particle morphology and the formation of irregular aggregates or loose crosslinked structure, thereby facilitating press-forming. Which has a shorter production process, the method is simple, advanced, easy to operate controls, reliable, high-purity tungsten powder, combined with high strength, stable quality, which compacts strength of up to 2.0 ~ 3.6MPa, sintered products for large density, high temperature good performance characteristics. It can be widely used in aviation, aerospace production flamethrowers, rocket flight rudder and other parts. BACKGROUND overcome poor formability of tungsten powder, compacts highest intensity 2.0MPa only and can not be further increased, can not meet the aviation, aerospace require the use of other ills.


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