Preparation Method of Tungsten Carbide-cobalt or Tungsten Carbide-cobalt-chromium Thermal Spraying Powder

The present invention relates to a WC - Co or WC - Co - Cr thermal spray powder preparation method of the tungsten carbide powder and cobalt powder or tungsten carbide powder, cobalt powder and chromium powder are mixed in a certain ratio to prepare a slurry, spray granulation, the granulated powder is sieved and the degreasing treatment, in the vertical high-temperature sintering furnace rapid sintering the powder in free movement continuously and evenly by heating and cooling zones, and the completion of the sintering in the heated zone, the protection atmosphere: nitrogen, sintering temperature: 1000 ~ 1700 ℃, sintering time: 0.1 ~ 5s, and finally sintered powder required for grading and screening. The invention solves the spherical tungsten carbide matrix composites using thermal spray powder in the presence of long production cycle, low productivity and high energy consumption and other problems during the preparation of the traditional method; the use of the present invention, the process is simple, continuous production, energy saving and environmental protection, the resulting powder composition uniformity, high sphericity and good mobility, can be widely used in aerospace, machinery manufacturing, and petroleum and chemical industry.


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