The invention discloses a method for manufacturing nanometer
tungsten /
cobalt carbide composite
powder. The method includes steps of firstly, dissolving, by
mass, 55-92% of water-soluble
tungsten salt, 3-40% of water-soluble
cobalt salt, 3-6% of water-soluble
carburizing and nodulizing agents and 0.1-2% of water-soluble composite
grain growth inhibitors into water with the
mass 3-5 times that of a mixture of the water-soluble
tungsten salt, the water-soluble
cobalt salt, the water-soluble
carburizing and nodulizing agents and the water-soluble composite
grain growth inhibitors to prepare mixed
aqueous solution; secondly, adding nanometer
carbon black accounting for 1-10% of the total
mass of the
aqueous solution into the mixed
aqueous solution obtained in the first step, stirring the nanometer
carbon black in the mixed aqueous solution at the rate of 10-30
revolutions per minute for 30-60 minutes so that the nanometer
carbon black can be uniformly mixed in the mixed aqueous solution; thirdly, performing quick low-temperature
spray drying for mixed aqueous solution obtained in the second step to obtain precursor
powder of ultrafine tungsten and cobalt composite salt; and fourthly, performing reduction synthesis and carbon conditioning at the temperature
ranging from 900 DEG C to 1000 DEG C for the precursor
powder obtained in the third step to manufacture tungsten /
cobalt carbide composite powder materials with nanostructures.