Method for Directly Manufacturing Heavy Pressure Blank Strength Tungsten Powder With Ammonium Metatungstate

The invention discloses a preparation method of high pressed compact strength tungsten powder by ammonium metatungstate (AMT) direct hydrogen reduction.

The tungsten powder prepared by the invention is directly formed into high-intensity pressed compacts without adding any forming agents, and the transverse rupture strength of the pressed compacts reaches 2.5 to 4.0MPa. The tungsten powder prepared by the invention can be widely used for preparing large tungsten products and tungsten alloy products. In the method, ammonium metatungstate is used for direct reduction, and calcination and other intermediate processes are not necessary, thereby process is simple and energy consumption is low.

The granularity of the tungsten powder prepared by the method is controlled to be homogeneous and the sintering activity is high, thereby being benefit for the preparation of high-performance tungsten products.

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