Preparation of Mixing Ultrafine Tungsten Carbide and Cobalt

The present invention provides ultrafine tungsten carbide, preparation methods for preparing a mixture of cobalt. Specific steps are as follows:

1) A soluble organic cobalt compound is dissolved in the solution, whichever solution is clear and transparent;

2) The organic solution of a cobalt compound 2) and ultra fine tungsten carbide powder having a volume 5-10 times of its mixing, a method to coat the organic cobalt compound is coated on the tungsten carbide surface sink;

3) Spray drying the liquid medium is evaporated to dryness, the organic cobalt compound is uniformly coated on the surface of a tungsten carbide particle;

4) Through the reduction of the metal cobalt evenly coated on the outer surface of each particle tungsten carbide, it forms a layer of tungsten carbide and cobalt .

The method is simple and easy to make, short process, but also make tungsten carbide, cobalt structured uniformly mixed, so that a subsequent step alloy sintered uniform shrinkage during curing, avoid WC grain growth during sintering, so hard for the final the curing process can be prepared carbide grain size of the alloy with the initial size of the ultrafine particle size fit carbide to provide a strong guarantee.


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